#include <dxconfig.h>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
#include <string.h>
#include <dx/dx.h>
#include "render.h"
#include "internals.h"
#define CAT(a,b) a##b
 
 
 static Error							    
  quad_vol (								    
	struct buffer *buf,						    
	struct xfield *xf,						    
	int nquad,							    
	Quadrilateral *quad,						    
	int *indices,							    
	int surface,							    
	int clip_status,						    
	inv_stat invalid_status						    
 ) {									    
	
 RGBColor *c1, *c2, *c3;						    
 float x1, y1, x2, y2, x3, y3;					    
 float r1, g1, b1, o1, z1, r2, g2, b2, o2, z2, r3, g3, b3, o3, z3;	    
 float Qx, dxo, dxz, dxr, dxg, dxb;					    
 float Qy, dyr, dyg, dyb, dyo, dyz, dyA, dyB;			    
 float r, g, b, o, obar, z, nearPlane=xf->nearPlane;			    
 float A, B, d, d1, d2, d3;						    
 int iy1, iy2, iy3;							    
 int iA, iB, iy, i, n, nn, left, right;				    
 float minx = buf->min.x, miny = buf->min.y;				    
 float maxx = buf->max.x, maxy = buf->max.y ;							    
	Pointer fcolors = xf->fcolors;					    
	Pointer bcolors = xf->bcolors;					    
	Pointer opacities = xf->opacities;				    
	RGBColor *cmap = xf->cmap;					    
	float *omap = xf->omap;						    
	char fbyte = xf->fbyte, bbyte = xf->bbyte;			    
	char obyte = xf->obyte;						    
 
    float cmul = xf->tile.color_multiplier;
    float omul = xf->tile.opacity_multiplier / cmul;
    if (xf->tile.perspective)
	DXErrorReturn(ERROR_BAD_PARAMETER,
		    "perspective volume rendering is not supported");
    if (!buf->merged)
	_dxf_MergeBackIntoZ(buf);
    if (opacities) {
	{ 
	
 Point *p;								    
 int v1, v2, v3, i, width, height, valid;				    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 float dr, dg, db;							    
 RGBColor *cmap = xf->cmap;						    
 RGBColor *colors;							    
 int cstcolors;							    
	
 if (xf->fcolors) {							    
	colors = xf->fcolors, cstcolors = xf->fcst;			    
 } else {								    
	colors = xf->bcolors, cstcolors = xf->bcst;			    
 }									    
	
 if (! colors)							    
	DXErrorReturn(ERROR_MISSING_DATA, "no colors in field");	    
	
  									    
 switch(invalid_status) {						    
	case INV_VALID:   iElts = NULL;      valid = 1; break;		    
	case INV_INVALID: iElts = NULL;      valid = 0; break;		    
	case INV_UNKNOWN: iElts = xf->iElts;            break;		    
 }									    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	float dps, dqr;							    
	
	if (iElts)							    
	valid = DXIsElementValid(iElts, index);	    		    
	
	v1=quad[i].p, v2=quad[i].r, v3=quad[i].s ;							    
	
	 							    
	p = &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    	    
	p = &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    	    
	p = &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    	    
	
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  						
 if (valid) {							
	if (    1   ) {							
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else							
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qvo  ,  1 );				
	}								
	if (    1   ) {							
	if (cmap) c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;				
	r2=c2->r, g2=c2->g, b2=c2->b;				
	r3=c3->r, g3=c3->g, b3=c3->b;				
	} else if (    1   ) {						
	if (cmap) r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .r, g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .g, b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .b;	
	else {						 	
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  i );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  i ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
	}								
	if (    1   ) {							
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
	} else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  i ]]) ;					
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  i ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  i ]);			
} ;					
	obar = 1.0-o;						
	} else								
	o = 1.0, obar = 0.0;					
	
	if (    1   ) dxr = d1*r1 + d2*r2 + d3*r3;				
	if (    1   ) dxg = d1*g1 + d2*g2 + d3*g3;				
	if (    1   ) dxb = d1*b1 + d2*b2 + d3*b3;				
	if (    1   )   dxo = d1*o1 + d2*o2 + d3*o3;				
 } else								
	r1 = r2 = r3 = g1 = g2 = g3 = b1 = b2 = b3 = o1 = o2 = o3 = 0.0;
	
  							
 dxz = d1*z1 + d2*z2 + d3*z3;					
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (     1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (     1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (     1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (     1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (     1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (     1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)				 		
	goto CAT(    qvo  ,  1 );						
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (valid) {							
	if (    1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;	
	if (    1   ) dyo = (float)(o3-o1) * Qy;				
 }									
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->    u.big   + iy1*width;					    	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->    u.big  ;					    	
 A += dyA*d;  
	
	
 if (valid) {							
	if (    1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;			
	if (    1   ) o1+=dyo*d;						
 }									
 z1 += dyz*d;							
	
  				
 nn = 0;								
 if (valid) {							
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
}  	
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 	    	
 } else {								
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 }									
 buf->pixels += nn;							
} ;
	}								    
	
 CAT(  qvo ,1) :								    
	v1=quad[i].q, v2=quad[i].p, v3=quad[i].s ;							    
	
	 							    
	p = &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    	    
	p = &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    	    
	p = &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    	    
	
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  						
 if (valid) {							
	if (    1   ) {							
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else							
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qvo  ,  2 );				
	}								
	if (    1   ) {							
	if (cmap) c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;				
	r2=c2->r, g2=c2->g, b2=c2->b;				
	r3=c3->r, g3=c3->g, b3=c3->b;				
	} else if (    1   ) {						
	if (cmap) r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .r, g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .g, b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .b;	
	else {						 	
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  i );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  i ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
	}								
	if (    1   ) {							
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
	} else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  i ]]) ;					
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  i ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  i ]);			
} ;					
	obar = 1.0-o;						
	} else								
	o = 1.0, obar = 0.0;					
	
	if (    1   ) dxr = d1*r1 + d2*r2 + d3*r3;				
	if (    1   ) dxg = d1*g1 + d2*g2 + d3*g3;				
	if (    1   ) dxb = d1*b1 + d2*b2 + d3*b3;				
	if (    1   )   dxo = d1*o1 + d2*o2 + d3*o3;				
 } else								
	r1 = r2 = r3 = g1 = g2 = g3 = b1 = b2 = b3 = o1 = o2 = o3 = 0.0;
	
  							
 dxz = d1*z1 + d2*z2 + d3*z3;					
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (     1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (     1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (     1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (     1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (     1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (     1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)				 		
	goto CAT(    qvo  ,  2 );						
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (valid) {							
	if (    1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;	
	if (    1   ) dyo = (float)(o3-o1) * Qy;				
 }									
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->    u.big   + iy1*width;					    	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->    u.big  ;					    	
 A += dyA*d; ;
	
	
 if (valid) {							
	if (    1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;			
	if (    1   ) o1+=dyo*d;						
 }									
 z1 += dyz*d;							
	
  				
 nn = 0;								
 if (valid) {							
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
}  	
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 	    	
 } else {								
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 }									
 buf->pixels += nn;							
} ;
 CAT(  qvo ,2) :								    
	continue;							    
 }									    
} ;
    } else {
	{ 
	
 Point *p;								    
 int v1, v2, v3, i, width, height, valid;				    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 float dr, dg, db;							    
 RGBColor *cmap = xf->cmap;						    
 RGBColor *colors;							    
 int cstcolors;							    
	
 if (xf->fcolors) {							    
	colors = xf->fcolors, cstcolors = xf->fcst;			    
 } else {								    
	colors = xf->bcolors, cstcolors = xf->bcst;			    
 }									    
	
 if (! colors)							    
	DXErrorReturn(ERROR_MISSING_DATA, "no colors in field");	    
	
  									    
 switch(invalid_status) {						    
	case INV_VALID:   iElts = NULL;      valid = 1; break;		    
	case INV_INVALID: iElts = NULL;      valid = 0; break;		    
	case INV_UNKNOWN: iElts = xf->iElts;            break;		    
 }									    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	float dps, dqr;							    
	
	if (iElts)							    
	valid = DXIsElementValid(iElts, index);	    		    
	
	v1=quad[i].p, v2=quad[i].r, v3=quad[i].s ;							    
	
	 							    
	p = &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    	    
	p = &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    	    
	p = &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    	    
	
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  						
 if (valid) {							
	if (    1   ) {							
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else							
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qvno  ,  1 );				
	}								
	if (    1   ) {							
	if (cmap) c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;				
	r2=c2->r, g2=c2->g, b2=c2->b;				
	r3=c3->r, g3=c3->g, b3=c3->b;				
	} else if (    1   ) {						
	if (cmap) r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .r, g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .g, b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .b;	
	else {						 	
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  i );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  i ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
	}								
	if (   0   ) {							
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
	} else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  i ]]) ;					
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  i ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  i ]);			
} ;					
	obar = 1.0-o;						
	} else								
	o = 1.0, obar = 0.0;					
	
	if (    1   ) dxr = d1*r1 + d2*r2 + d3*r3;				
	if (    1   ) dxg = d1*g1 + d2*g2 + d3*g3;				
	if (    1   ) dxb = d1*b1 + d2*b2 + d3*b3;				
	if (   0   )   dxo = d1*o1 + d2*o2 + d3*o3;				
 } else								
	r1 = r2 = r3 = g1 = g2 = g3 = b1 = b2 = b3 = o1 = o2 = o3 = 0.0;
	
  							
 dxz = d1*z1 + d2*z2 + d3*z3;					
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (     1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (     1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (     1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)				 		
	goto CAT(    qvno  ,  1 );						
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (valid) {							
	if (    1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;	
	if (   0   ) dyo = (float)(o3-o1) * Qy;				
 }									
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->    u.big   + iy1*width;					    	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->    u.big  ;					    	
 A += dyA*d;  
	
	
 if (valid) {							
	if (    1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;			
	if (   0   ) o1+=dyo*d;						
 }									
 z1 += dyz*d;							
	
  				
 nn = 0;								
 if (valid) {							
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
}  	
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 	    	
 } else {								
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 }									
 buf->pixels += nn;							
} ;
	}								    
	
 CAT(  qvno ,1) :								    
	v1=quad[i].q, v2=quad[i].p, v3=quad[i].s ;							    
	
	 							    
	p = &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    	    
	p = &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    	    
	p = &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    	    
	
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  						
 if (valid) {							
	if (    1   ) {							
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else							
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qvno  ,  2 );				
	}								
	if (    1   ) {							
	if (cmap) c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;				
	r2=c2->r, g2=c2->g, b2=c2->b;				
	r3=c3->r, g3=c3->g, b3=c3->b;				
	} else if (    1   ) {						
	if (cmap) r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .r, g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .g, b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .b;	
	else {						 	
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  i );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  i ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
	}								
	if (   0   ) {							
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
	} else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  i ]]) ;					
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  i ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  i ]);			
} ;					
	obar = 1.0-o;						
	} else								
	o = 1.0, obar = 0.0;					
	
	if (    1   ) dxr = d1*r1 + d2*r2 + d3*r3;				
	if (    1   ) dxg = d1*g1 + d2*g2 + d3*g3;				
	if (    1   ) dxb = d1*b1 + d2*b2 + d3*b3;				
	if (   0   )   dxo = d1*o1 + d2*o2 + d3*o3;				
 } else								
	r1 = r2 = r3 = g1 = g2 = g3 = b1 = b2 = b3 = o1 = o2 = o3 = 0.0;
	
  							
 dxz = d1*z1 + d2*z2 + d3*z3;					
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (     1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (     1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (     1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)				 		
	goto CAT(    qvno  ,  2 );						
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (valid) {							
	if (    1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;	
	if (   0   ) dyo = (float)(o3-o1) * Qy;				
 }									
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->    u.big   + iy1*width;					    	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->    u.big  ;					    	
 A += dyA*d; ;
	
	
 if (valid) {							
	if (    1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;			
	if (   0   ) o1+=dyo*d;						
 }									
 z1 += dyz*d;							
	
  				
 nn = 0;								
 if (valid) {							
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
}  	
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 	    	
 } else {								
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 }									
 buf->pixels += nn;							
} ;
 CAT(  qvno ,2) :								    
	continue;							    
 }									    
} ;
    }
	return OK;							    
 } 
 static Error							    
  quad_translucent (								    
	struct buffer *buf,						    
	struct xfield *xf,						    
	int nquad,							    
	Quadrilateral *quad,						    
	int *indices,							    
	int surface,							    
	int clip_status,						    
	inv_stat invalid_status						    
 ) {									    
	
 RGBColor *c1, *c2, *c3;						    
 float x1, y1, x2, y2, x3, y3;					    
 float r1, g1, b1, o1, z1, r2, g2, b2, o2, z2, r3, g3, b3, o3, z3;	    
 float Qx, dxo, dxz, dxr, dxg, dxb;					    
 float Qy, dyr, dyg, dyb, dyo, dyz, dyA, dyB;			    
 float r, g, b, o, obar, z, nearPlane=xf->nearPlane;			    
 float A, B, d, d1, d2, d3;						    
 int iy1, iy2, iy3;							    
 int iA, iB, iy, i, n, nn, left, right;				    
 float minx = buf->min.x, miny = buf->min.y;				    
 float maxx = buf->max.x, maxy = buf->max.y ;							    
	Pointer fcolors = xf->fcolors;					    
	Pointer bcolors = xf->bcolors;					    
	Pointer opacities = xf->opacities;				    
	RGBColor *cmap = xf->cmap;					    
	float *omap = xf->omap;						    
	char fbyte = xf->fbyte, bbyte = xf->bbyte;			    
	char obyte = xf->obyte;						    
 
    if (xf->colors_dep == dep_connections)
    {
	if (clip_status) {
	    { 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT(  qtcdc ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qtcdc  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(    qtcdc  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT(  qtcdc ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qtcdc  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(    qtcdc  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT(  qtcdc ,2) :								    
	continue;							    
 }									    
} ;
	} else if (buf->pix_type==pix_fast) {
	    { 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT(  qtfdc ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qtfdc  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(    qtfdc  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT(  qtfdc ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qtfdc  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(    qtfdc  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT(  qtfdc ,2) :								    
	continue;							    
 }									    
} ;
	} else if (buf->pix_type==pix_big) {
	    { 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT(  qtbdc ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qtbdc  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(    qtbdc  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT(  qtbdc ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qtbdc  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(    qtbdc  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT(  qtbdc ,2) :								    
	continue;							    
 }									    
} ;
	} else {
	    DXSetError(ERROR_INTERNAL, "unknown pix_type %d", buf->pix_type);
	    return ERROR;
	}
    }
    else
    {
	if (clip_status) {
	    { 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qtcdp ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qtcdp  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qtcdp  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qtcdp ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qtcdp  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qtcdp  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qtcdp ,2) :								    
	continue;							    
 }									    
} ;
	} else if (buf->pix_type==pix_fast) {
	    { 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qtfdp ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qtfdp  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qtfdp  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qtfdp ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qtfdp  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qtfdp  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qtfdp ,2) :								    
	continue;							    
 }									    
} ;
	} else if (buf->pix_type==pix_big) {
	    { 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qtbdp ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qtbdp  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qtbdp  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qtbdp ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qtbdp  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    				0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qtbdp  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qtbdp ,2) :								    
	continue;							    
 }									    
} ;
	} else {
	    DXSetError(ERROR_INTERNAL, "unknown pix_type %d", buf->pix_type);
	    return ERROR;
	}
    }
	return OK;							    
 } 
 static Error							    
  quad_opaque (								    
	struct buffer *buf,						    
	struct xfield *xf,						    
	int nquad,							    
	Quadrilateral *quad,						    
	int *indices,							    
	int surface,							    
	int clip_status,						    
	inv_stat invalid_status						    
 ) {									    
	
 RGBColor *c1, *c2, *c3;						    
 float x1, y1, x2, y2, x3, y3;					    
 float r1, g1, b1, o1, z1, r2, g2, b2, o2, z2, r3, g3, b3, o3, z3;	    
 float Qx, dxo, dxz, dxr, dxg, dxb;					    
 float Qy, dyr, dyg, dyb, dyo, dyz, dyA, dyB;			    
 float r, g, b, o, obar, z, nearPlane=xf->nearPlane;			    
 float A, B, d, d1, d2, d3;						    
 int iy1, iy2, iy3;							    
 int iA, iB, iy, i, n, nn, left, right;				    
 float minx = buf->min.x, miny = buf->min.y;				    
 float maxx = buf->max.x, maxy = buf->max.y ;							    
	Pointer fcolors = xf->fcolors;					    
	Pointer bcolors = xf->bcolors;					    
	Pointer opacities = xf->opacities;				    
	RGBColor *cmap = xf->cmap;					    
	float *omap = xf->omap;						    
	char fbyte = xf->fbyte, bbyte = xf->bbyte;			    
	char obyte = xf->obyte;						    
 
    if (clip_status) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qoc ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qoc  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qoc  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front && z>p->back)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front && z>p->back)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qoc ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qoc  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qoc  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front && z>p->back)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front && z>p->back)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qoc ,2) :								    
	continue;							    
 }									    
} ;
    } else if (buf->pix_type==pix_fast) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qof ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qof  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qof  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qof ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qof  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qof  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qof ,2) :								    
	continue;							    
 }									    
} ;
    } else if (buf->pix_type==pix_big) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qob ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qob  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qob  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qob ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qob  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qob  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qob ,2) :								    
	continue;							    
 }									    
} ;
    } else {
	DXSetError(ERROR_INTERNAL, "unknown pix_type %d", buf->pix_type);
	return ERROR;
    }
	return OK;							    
 } 
Error
_dxf_QuadClipping(
    struct buffer *buf,
    struct xfield *xf,
    int nquad,
    Quadrilateral *quad,
    int *indices)
{
    
 RGBColor *c1, *c2, *c3;						    
 float x1, y1, x2, y2, x3, y3;					    
 float r1, g1, b1, o1, z1, r2, g2, b2, o2, z2, r3, g3, b3, o3, z3;	    
 float Qx, dxo, dxz, dxr, dxg, dxb;					    
 float Qy, dyr, dyg, dyb, dyo, dyz, dyA, dyB;			    
 float r, g, b, o, obar, z, nearPlane=xf->nearPlane;			    
 float A, B, d, d1, d2, d3;						    
 int iy1, iy2, iy3;							    
 int iA, iB, iy, i, n, nn, left, right;				    
 float minx = buf->min.x, miny = buf->min.y;				    
 float maxx = buf->max.x, maxy = buf->max.y ;
    Pointer fcolors = NULL;		 
    Pointer bcolors = NULL;		 
    Pointer opacities = NULL;
    RGBColor *cmap = NULL;
    float *omap = NULL;
    inv_stat invalid_status = INV_VALID;
    char fbyte = xf->fbyte, bbyte = xf->bbyte;
    char obyte = xf->obyte;
    if (xf->tile.perspective) {
	struct xfield xx;
	for (i=0; i<nquad; ) {
	    i = _dxf_zclip_quads(xf, (int *)quad, i, indices, nquad, &xx, INV_VALID);
	    if (xx.nconnections)
		_dxf_TriangleClipping(buf, &xx, xx.nconnections,
		xx.c.triangles, xx.indices);
	}
    }
    { 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 0   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT(  qc ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   0   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qc  ,  1 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   0   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(    qc  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     1   ) {						
	     {	if (z > p->front)	p->front = z;	if (z < p->back)	p->back = z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     1   ) {						
	     {	if (z > p->front)	p->front = z;	if (z < p->back)	p->back = z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT(  qc ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   0   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qc  ,  2 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   0   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(    qc  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     1   ) {						
	     {	if (z > p->front)	p->front = z;	if (z < p->back)	p->back = z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     1   ) {						
	     {	if (z > p->front)	p->front = z;	if (z < p->back)	p->back = z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT(  qc ,2) :								    
	continue;							    
 }									    
} ;
    return OK;
}
static Error
_dxf_QuadComposite(
    struct buffer *buf,
    struct xfield *xf,
    int nquad,
    Quadrilateral *quad,
    int *indices,
    int clip_status,
    inv_stat invalid_status
) {
    
 RGBColor *c1, *c2, *c3;						    
 float x1, y1, x2, y2, x3, y3;					    
 float r1, g1, b1, o1, z1, r2, g2, b2, o2, z2, r3, g3, b3, o3, z3;	    
 float Qx, dxo, dxz, dxr, dxg, dxb;					    
 float Qy, dyr, dyg, dyb, dyo, dyz, dyA, dyB;			    
 float r, g, b, o, obar, z, nearPlane=xf->nearPlane;			    
 float A, B, d, d1, d2, d3;						    
 int iy1, iy2, iy3;							    
 int iA, iB, iy, i, n, nn, left, right;				    
 float minx = buf->min.x, miny = buf->min.y;				    
 float maxx = buf->max.x, maxy = buf->max.y ;
    Pointer fcolors = xf->fcolors;
    Pointer bcolors = xf->bcolors;
    Pointer opacities = xf->opacities;
    RGBColor *cmap = xf->cmap;
    float *omap = xf->omap;
    char fbyte = xf->fbyte, bbyte = xf->bbyte;
    char obyte = xf->obyte;
    if (xf->tile.perspective)
	DXErrorReturn(ERROR_BAD_PARAMETER,
		    "perspective volume rendering is not supported");
    if (clip_status) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qcc ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qcc  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qcc  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qcc ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qcc  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qcc  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qcc ,2) :								    
	continue;							    
 }									    
} ;
    } else if (buf->pix_type==pix_fast) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qcf ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qcf  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qcf  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qcf ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qcf  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qcf  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qcf ,2) :								    
	continue;							    
 }									    
} ;
    } else if (buf->pix_type==pix_big) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 1   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qcb ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qcb  ,  1 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qcb  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qcb ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qcb  ,  2 );				
 }									
 if (   1   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   1   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   1   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   1   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    1    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    1    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qcb  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   1   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   1   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   1   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   1   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     1    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     1    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r+obar*p->c.r;	p->c.g=g+obar*p->c.g;	p->c.b=b+obar*p->c.b;	}    ;						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     1    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     1    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     1    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     1    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qcb ,2) :								    
	continue;							    
 }									    
} ;
    } else {
	DXSetError(ERROR_INTERNAL, "unknown pix_type %d", buf->pix_type);
	return ERROR;
    }
    return OK;
}
Error
_dxf_Quad(struct buffer *buf,
	  struct xfield *xf,
	  int nquad,
	  Quadrilateral *quad,
	  int *indices,
	  int surface,
	  int clip_status,
	  inv_stat invalid_status)
{
    int i;
    char fbyte = xf->fbyte, bbyte = xf->bbyte;
    char obyte = xf->obyte;
    if (xf->tile.perspective) {
	struct xfield xx;
	for (i=0; i<nquad; ) {
	    i = _dxf_zclip_quads(xf, (int *)quad, i, indices, nquad, &xx, invalid_status);
	    if (xx.nconnections)
		_dxf_Triangle(buf, &xx, xx.nconnections, xx.c.triangles,
			xx.indices, surface, clip_status, INV_VALID);
	}
    }
    if (xf->volume)
	return quad_vol(buf, xf, nquad, quad, indices, surface, 
				    clip_status, invalid_status);
    if (xf->opacities)
	return quad_translucent(buf, xf, nquad, quad, indices, surface, 
				    clip_status, invalid_status);
    else
	return quad_opaque(buf, xf, nquad, quad, indices, surface, 
				    clip_status, invalid_status);
}
 static Error					
  quad_flat_face (						
	struct buffer *buf,				
	struct xfield *xf,				
	int nquad,					
	Quadrilateral *quad,				
	int *indices,					
	Pointer fcolors,				
	Pointer bcolors,				
	Pointer opacities,				
	int surface,					
	int clip_status,				
	inv_stat invalid_status				
 ) {							
	
 RGBColor *c1, *c2, *c3;						    
 float x1, y1, x2, y2, x3, y3;					    
 float r1, g1, b1, o1, z1, r2, g2, b2, o2, z2, r3, g3, b3, o3, z3;	    
 float Qx, dxo, dxz, dxr, dxg, dxb;					    
 float Qy, dyr, dyg, dyb, dyo, dyz, dyA, dyB;			    
 float r, g, b, o, obar, z, nearPlane=xf->nearPlane;			    
 float A, B, d, d1, d2, d3;						    
 int iy1, iy2, iy3;							    
 int iA, iB, iy, i, n, nn, left, right;				    
 float minx = buf->min.x, miny = buf->min.y;				    
 float maxx = buf->max.x, maxy = buf->max.y ;					
	RGBColor *cmap = xf->cmap;			
	float *omap = xf->omap;				
	char fbyte = xf->fbyte, bbyte = xf->bbyte;	
	char obyte = xf->obyte; 
    { 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if (  0   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qff ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (    1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qff  ,  1 );				
 }									
 if (    0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (    1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (    0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (    0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (    0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (     0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (     0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (     0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (     0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (     0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (     0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    1  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qff  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (    0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (    0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->    u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->    u.big  ;					   	
 A += dyA*d;								
 if (    0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (    0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	p->co.r=r; p->co.g=g; p->co.b=b; p->co.o=z;	p->in ^= IN_FACE;	}    ;						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	p->co.r=r; p->co.g=g; p->co.b=b; p->co.o=z;	p->in ^= IN_FACE;	}    ;						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qff ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (    1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qff  ,  2 );				
 }									
 if (    0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (    1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (    0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (    0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (    0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (     0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (     0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (     0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (     0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (     0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (     0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    1  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qff  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (    0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (    0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->    u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->    u.big  ;					   	
 A += dyA*d;								
 if (    0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (    0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	p->co.r=r; p->co.g=g; p->co.b=b; p->co.o=z;	p->in ^= IN_FACE;	}    ;						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	p->co.r=r; p->co.g=g; p->co.b=b; p->co.o=z;	p->in ^= IN_FACE;	}    ;						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qff ,2) :								    
	continue;							    
 }									    
} ;
	return OK;					
 } 
 static Error					
  quad_flat_vol (						
	struct buffer *buf,				
	struct xfield *xf,				
	int nquad,					
	Quadrilateral *quad,				
	int *indices,					
	Pointer fcolors,				
	Pointer bcolors,				
	Pointer opacities,				
	int surface,					
	int clip_status,				
	inv_stat invalid_status				
 ) {							
	
 RGBColor *c1, *c2, *c3;						    
 float x1, y1, x2, y2, x3, y3;					    
 float r1, g1, b1, o1, z1, r2, g2, b2, o2, z2, r3, g3, b3, o3, z3;	    
 float Qx, dxo, dxz, dxr, dxg, dxb;					    
 float Qy, dyr, dyg, dyb, dyo, dyz, dyA, dyB;			    
 float r, g, b, o, obar, z, nearPlane=xf->nearPlane;			    
 float A, B, d, d1, d2, d3;						    
 int iy1, iy2, iy3;							    
 int iA, iB, iy, i, n, nn, left, right;				    
 float minx = buf->min.x, miny = buf->min.y;				    
 float maxx = buf->max.x, maxy = buf->max.y ;					
	RGBColor *cmap = xf->cmap;			
	float *omap = xf->omap;				
	char fbyte = xf->fbyte, bbyte = xf->bbyte;	
	char obyte = xf->obyte; 
    float cmul = xf->tile.color_multiplier;
    float omul = xf->tile.opacity_multiplier / cmul;
    if (xf->tile.perspective)
	DXErrorReturn(ERROR_BAD_PARAMETER,
		    "perspective volume rendering is not supported");
    if (!buf->merged)
        _dxf_MergeBackIntoZ(buf);
    { 
	
 Point *p;								    
 int v1, v2, v3, i, width, height, valid;				    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 float dr, dg, db;							    
 RGBColor *cmap = xf->cmap;						    
 RGBColor *colors;							    
 int cstcolors;							    
	
 if (xf->fcolors) {							    
	colors = xf->fcolors, cstcolors = xf->fcst;			    
 } else {								    
	colors = xf->bcolors, cstcolors = xf->bcst;			    
 }									    
	
 if (! colors)							    
	DXErrorReturn(ERROR_MISSING_DATA, "no colors in field");	    
	
  									    
 switch(invalid_status) {						    
	case INV_VALID:   iElts = NULL;      valid = 1; break;		    
	case INV_INVALID: iElts = NULL;      valid = 0; break;		    
	case INV_UNKNOWN: iElts = xf->iElts;            break;		    
 }									    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	float dps, dqr;							    
	
	if (iElts)							    
	valid = DXIsElementValid(iElts, index);	    		    
	
	v1=quad[i].p, v2=quad[i].r, v3=quad[i].s ;							    
	
	 							    
	p = &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    	    
	p = &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    	    
	p = &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    	    
	
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  						
 if (valid) {							
	if (    1   ) {							
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else							
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qfv  ,  1 );				
	}								
	if (    0   ) {							
	if (cmap) c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;				
	r2=c2->r, g2=c2->g, b2=c2->b;				
	r3=c3->r, g3=c3->g, b3=c3->b;				
	} else if (    1   ) {						
	if (cmap) r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .r, g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .g, b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .b;	
	else {						 	
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  i );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  i ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
	}								
	if (    0   ) {							
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
	} else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  i ]]) ;					
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  i ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  i ]);			
} ;					
	obar = 1.0-o;						
	} else								
	o = 1.0, obar = 0.0;					
	
	if (    0   ) dxr = d1*r1 + d2*r2 + d3*r3;				
	if (    0   ) dxg = d1*g1 + d2*g2 + d3*g3;				
	if (    0   ) dxb = d1*b1 + d2*b2 + d3*b3;				
	if (    0   )   dxo = d1*o1 + d2*o2 + d3*o3;				
 } else								
	r1 = r2 = r3 = g1 = g2 = g3 = b1 = b2 = b3 = o1 = o2 = o3 = 0.0;
	
  							
 dxz = d1*z1 + d2*z2 + d3*z3;					
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (     0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (     0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (     0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (     0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (     0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (     0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)				 		
	goto CAT(    qfv  ,  1 );						
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (valid) {							
	if (    0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;	
	if (    0   ) dyo = (float)(o3-o1) * Qy;				
 }									
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->    u.big   + iy1*width;					    	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->    u.big  ;					    	
 A += dyA*d;  
	
	
 if (valid) {							
	if (    0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;			
	if (    0   ) o1+=dyo*d;						
 }									
 z1 += dyz*d;							
	
  				
 nn = 0;								
 if (valid) {							
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
}  	
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 	    	
 } else {								
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 }									
 buf->pixels += nn;							
} ;
	}								    
	
 CAT(  qfv ,1) :								    
	v1=quad[i].q, v2=quad[i].p, v3=quad[i].s ;							    
	
	 							    
	p = &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    	    
	p = &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    	    
	p = &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    	    
	
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  						
 if (valid) {							
	if (    1   ) {							
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else							
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(    qfv  ,  2 );				
	}								
	if (    0   ) {							
	if (cmap) c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;				
	r2=c2->r, g2=c2->g, b2=c2->b;				
	r3=c3->r, g3=c3->g, b3=c3->b;				
	} else if (    1   ) {						
	if (cmap) r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .r, g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .g, b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  i ]]) .b;	
	else {						 	
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  i );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  i ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
	}								
	if (    0   ) {							
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
	} else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  i ]]) ;					
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  i ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  i ]);			
} ;					
	obar = 1.0-o;						
	} else								
	o = 1.0, obar = 0.0;					
	
	if (    0   ) dxr = d1*r1 + d2*r2 + d3*r3;				
	if (    0   ) dxg = d1*g1 + d2*g2 + d3*g3;				
	if (    0   ) dxb = d1*b1 + d2*b2 + d3*b3;				
	if (    0   )   dxo = d1*o1 + d2*o2 + d3*o3;				
 } else								
	r1 = r2 = r3 = g1 = g2 = g3 = b1 = b2 = b3 = o1 = o2 = o3 = 0.0;
	
  							
 dxz = d1*z1 + d2*z2 + d3*z3;					
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (     0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (     0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (     0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (     0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (     0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (     0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)				 		
	goto CAT(    qfv  ,  2 );						
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (valid) {							
	if (    0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;	
	if (    0   ) dyo = (float)(o3-o1) * Qy;				
 }									
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->    u.big   + iy1*width;					    	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->    u.big  ;					    	
 A += dyA*d; ;
	
	
 if (valid) {							
	if (    0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;			
	if (    0   ) o1+=dyo*d;						
 }									
 z1 += dyz*d;							
	
  				
 nn = 0;								
 if (valid) {							
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
}  	
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (      0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (      0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (      0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (      0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (      0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (      0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 	    	
 } else {								
	{	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
	{	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (  0 ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (  0 ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (      1   ) {						
	      {	if (p->in<=0) {	if (z < p->front) {	if (surface) {	p->in++;	if (z > p->back)	p->back = z;	if (valid && !xf->tile.flat_z)	{ p->co.r=r; p->co.g=g; p->co.b=b; }	}	}	} else {	if (surface)	p->in = 0;	if (z >= p->front) {	p->in = -DXD_MAX_INT;	z = p->front;	}	if (z > p->back) {	float ar; float ag; float ab; float ao;	if (valid) { if (  1) {	d = (z - p->back) * cmul;	ar = d * r;	ag = d * g;	ab = d * b;	ao = d * o * omul;	} else {	d = 0.5 * (z - p->back) * cmul;	ar = d * (p->co.r+r);	ag = d * (p->co.g+g);	ab = d * (p->co.b+b);	ao = d * (p->co.o+r) * omul;	p->co.r = r;	p->co.g = g;	p->co.b = b;	p->co.o = o;	}	if (  1) {	if ((obar=1-ao) < 0.0)	obar = 0.0;	} else {	if ((obar=1-0.125*ao) < 0.0)	obar = 0.0;	obar = obar*obar; obar = obar*obar; obar = obar*obar;	}	p->c.r = p->c.r * obar + ar;	p->c.g = p->c.g * obar + ag;	p->c.b = p->c.b * obar + ab;	}	p->back = z;	}	}	}    ;						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (  0 ) r+=dxr, g+=dxg, b+=dxb;		
	if (  0 ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (  0 ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (  0 ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 }									
 buf->pixels += nn;							
} ;
 CAT(  qfv ,2) :								    
	continue;							    
 }									    
} ;
	return OK;					
 } 
 static Error					
  quad_flat_translucent (						
	struct buffer *buf,				
	struct xfield *xf,				
	int nquad,					
	Quadrilateral *quad,				
	int *indices,					
	Pointer fcolors,				
	Pointer bcolors,				
	Pointer opacities,				
	int surface,					
	int clip_status,				
	inv_stat invalid_status				
 ) {							
	
 RGBColor *c1, *c2, *c3;						    
 float x1, y1, x2, y2, x3, y3;					    
 float r1, g1, b1, o1, z1, r2, g2, b2, o2, z2, r3, g3, b3, o3, z3;	    
 float Qx, dxo, dxz, dxr, dxg, dxb;					    
 float Qy, dyr, dyg, dyb, dyo, dyz, dyA, dyB;			    
 float r, g, b, o, obar, z, nearPlane=xf->nearPlane;			    
 float A, B, d, d1, d2, d3;						    
 int iy1, iy2, iy3;							    
 int iA, iB, iy, i, n, nn, left, right;				    
 float minx = buf->min.x, miny = buf->min.y;				    
 float maxx = buf->max.x, maxy = buf->max.y ;					
	RGBColor *cmap = xf->cmap;			
	float *omap = xf->omap;				
	char fbyte = xf->fbyte, bbyte = xf->bbyte;	
	char obyte = xf->obyte; 
    if (clip_status) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 0   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qftc ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qftc  ,  1 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qftc  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qftc ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qftc  ,  2 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qftc  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qftc ,2) :								    
	continue;							    
 }									    
} ;
    } else if (buf->pix_type==pix_fast) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 0   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qftf ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qftf  ,  1 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qftf  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qftf ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qftf  ,  2 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qftf  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qftf ,2) :								    
	continue;							    
 }									    
} ;
    } else if (buf->pix_type==pix_big) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 0   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qftb ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qftb  ,  1 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qftb  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qftb ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qftb  ,  2 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qftb  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=o*r+obar*p->c.r;	p->c.g=o*g+obar*p->c.g;	p->c.b=o*b+obar*p->c.b;	if (o > 0.5 )	p->z=z;	}    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qftb ,2) :								    
	continue;							    
 }									    
} ;
    } else {
	DXSetError(ERROR_INTERNAL, "unknown pix_type %d", buf->pix_type);
	return ERROR;
    }
	return OK;					
 } 
 static Error					
  quad_flat_opaque (						
	struct buffer *buf,				
	struct xfield *xf,				
	int nquad,					
	Quadrilateral *quad,				
	int *indices,					
	Pointer fcolors,				
	Pointer bcolors,				
	Pointer opacities,				
	int surface,					
	int clip_status,				
	inv_stat invalid_status				
 ) {							
	
 RGBColor *c1, *c2, *c3;						    
 float x1, y1, x2, y2, x3, y3;					    
 float r1, g1, b1, o1, z1, r2, g2, b2, o2, z2, r3, g3, b3, o3, z3;	    
 float Qx, dxo, dxz, dxr, dxg, dxb;					    
 float Qy, dyr, dyg, dyb, dyo, dyz, dyA, dyB;			    
 float r, g, b, o, obar, z, nearPlane=xf->nearPlane;			    
 float A, B, d, d1, d2, d3;						    
 int iy1, iy2, iy3;							    
 int iA, iB, iy, i, n, nn, left, right;				    
 float minx = buf->min.x, miny = buf->min.y;				    
 float maxx = buf->max.x, maxy = buf->max.y ;					
	RGBColor *cmap = xf->cmap;			
	float *omap = xf->omap;				
	char fbyte = xf->fbyte, bbyte = xf->bbyte;	
	char obyte = xf->obyte; 
    if (clip_status) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 0   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qfoc ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qfoc  ,  1 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qfoc  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front && z>p->back)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front && z>p->back)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qfoc ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qfoc  ,  2 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qfoc  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front && z>p->back)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z && z<p->front && z>p->back)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qfoc ,2) :								    
	continue;							    
 }									    
} ;
    } else if (buf->pix_type==pix_fast) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 0   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qfof ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qfof  ,  1 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qfof  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qfof ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct fast   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qfof  ,  2 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qfof  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.fast   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.fast  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qfof ,2) :								    
	continue;							    
 }									    
} ;
    } else if (buf->pix_type==pix_big) {
	{ 	    
	
 Point *p;								    
 int v1, v2, v3, i, width, height;					    
 int i1, i2, i3;							    
 float ox, oy;							    
 InvalidComponentHandle iElts;					    
 RGBColor vcolors[8];						    
 int shademe;							    
 char fcst = xf->fcst, bcst = xf->bcst, ncst = xf->ncst;		    
 char fbyte = xf->fbyte, bbyte = xf->bbyte;				    
 char obyte = xf->obyte;						    
	
 iElts = (invalid_status == INV_UNKNOWN) ? xf->iElts : NULL;		    
	
 width = buf->width, height = buf->height;				    
 ox = buf->ox, oy = buf->oy;						    
	
 if ( 0   && xf->lights) {						    
	fcolors = (Pointer)vcolors;					    
	bcolors = (Pointer)(vcolors+4);					    
	_dxfInitApplyLights(xf->kaf, xf->kdf, xf->ksf, xf->kspf,	    
	xf->kab, xf->kdb, xf->ksb, xf->kspb,            
	xf->fcolors, xf->bcolors, xf->cmap,		    
	xf->normals, xf->lights,			    
	xf->colors_dep, xf->normals_dep,		    
	fcolors, bcolors, 4, fcst, bcst, ncst, 	    
	fbyte, bbyte);				    
	cmap    = NULL;							    
	shademe = 1;							    
 } else {								    
	shademe = 0;							    
	if (fbyte || bbyte)						    
	_dxf_initUbyteToFloat();                                        
 }									    
	
 for (i=0; i<nquad; i++, quad++) {					    
	int index = (indices == NULL) ? i : indices[i];			    
	
	if (iElts && DXIsElementInvalid(iElts, index))			    
	continue;							    
	
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->r, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->s, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe)							    
	{ 								    
	i1 = 0; i2 = 2; i3 = 3;					    
	if (! _dxfApplyLights((int *)quad, &index, 1))	    	    
	return ERROR;						    
	}								    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	goto CAT( qfob ,1);					    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if (!((x1<minx && x2<minx && x3<minx) ||			    
	(x1>maxx && x2>maxx && x3>maxx) ||			    
	(y1<miny && y2<miny && y3<miny) ||			    
	(y1>maxy && y2>maxy && y3>maxy)))				    
	{								    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qfob  ,  1 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (   
					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qfob  ,  1 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	}								    
	
 CAT( qfob ,1) :								    
	 							    
	v1=quad->p, p= &xf->positions[v1], x1=p->x, y1=p->y, z1=p->z;	    
	v2=quad->s, p= &xf->positions[v2], x2=p->x, y2=p->y, z2=p->z;	    
	v3=quad->q, p= &xf->positions[v3], x3=p->x, y3=p->y, z3=p->z;	    
	
	if (shademe) i1 = 0, i2 = 3, i3 = 1;				    
	
	if (xf->tile.perspective) {					    
	if (z1>nearPlane || z2>nearPlane || z3>nearPlane)		    
	continue;						    
	z1=(float)-1.0/z1;  x1*=z1;  y1*=z1;			    
	z2=(float)-1.0/z2;  x2*=z2;  y2*=z2;			    
	z3=(float)-1.0/z3;  x3*=z3;  y3*=z3;			    
	}								    
	if ((x1<minx && x2<minx && x3<minx) ||				    
	(x1>maxx && x2>maxx && x3>maxx) ||				    
	(y1<miny && y2<miny && y3<miny) ||				    
	(y1>maxy && y2>maxy && y3>maxy))				    
	continue;						    
	
	buf->triangles++;						    
	{
	
   struct big   *pp, *p;							
 Pointer colors;							
 int cstcolors;							
 RGBColor cbuf1, cbuf2, cbuf3;					
 char cbyte;								
 char obyte = xf->obyte;						
	
  							
 x1+=ox, y1+=oy;							
 x2+=ox, y2+=oy;							
 x3+=ox, y3+=oy;							
	
  			
 if (x1<- (DXD_MAX_INT/2)  || x1> (DXD_MAX_INT/2)  || y1<- (DXD_MAX_INT/2)  || y1> (DXD_MAX_INT/2)  ||			
 x2<- (DXD_MAX_INT/2)  || x2> (DXD_MAX_INT/2)  || y2<- (DXD_MAX_INT/2)  || y2> (DXD_MAX_INT/2)  ||				
 x3<- (DXD_MAX_INT/2)  || x3> (DXD_MAX_INT/2)  || y3<- (DXD_MAX_INT/2)  || y3> (DXD_MAX_INT/2) )				
	DXErrorReturn(ERROR_BAD_PARAMETER,				
	"camera causes numerical overflow");			
	
  		
 d1 = y3-y2,  d2 = y1-y3,  d3 = y2-y1;				
 d = x1*d1 + x2*d2 + x3*d3;						
 Qx = d? (float)1.0 / (float)d : 0.0;				
 d1 *= Qx,  d2 *= Qx,  d3 *= Qx;					
	
  							
 if (   1   ) {								
	if (d < 0)							
	cbyte = fbyte, colors = fcolors, cstcolors = xf->fcst;	
	else								
	cbyte = bbyte, colors = bcolors, cstcolors = xf->bcst;	
	if (!colors) goto CAT(   qfob  ,  2 );				
 }									
 if (   0   ) {							
	if (shademe) {							
	c1 = ((RGBColor *)colors) + i1;				
	c2 = ((RGBColor *)colors) + i2;				
	c3 = ((RGBColor *)colors) + i3;				
	} else {							
	if (cmap)							
	c1= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v1 ]]) , c2= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v2 ]]) , c3= & (cmap[((unsigned char *)colors)[cstcolors ? 0 :  v3 ]]) ;	
	else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v1 );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  v1 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v2 );	
	  cbuf2 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf2 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf2 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf2  = (((RGBColor *)colors)[cstcolors ? 0 :  v2 ]);		
} ; 
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  v3 );	
	  cbuf3 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf3 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf3 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf3  = (((RGBColor *)colors)[cstcolors ? 0 :  v3 ]);		
} ;	
	c1 = &cbuf1; c2 = &cbuf2; c3 = &cbuf3;			
	}								
	}								
	r1=c1->r, g1=c1->g, b1=c1->b;					
	r2=c2->r, g2=c2->g, b2=c2->b;					
	r3=c3->r, g3=c3->g, b3=c3->b;					
 } else if (   1   ) {							
	if (cmap){							
	r= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .r; g= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .g; b= (cmap[((unsigned char *)colors)[cstcolors ? 0 :  index ]]) .b;	
	} else {							
	
{									
 if (cbyte)								
 {									
	RGBByteColor *ptr=((RGBByteColor *)colors)+(cstcolors ? 0 :  index );	
	  cbuf1 .r = _dxd_ubyteToFloat[ptr->r];				
	  cbuf1 .g = _dxd_ubyteToFloat[ptr->g];				
	  cbuf1 .b = _dxd_ubyteToFloat[ptr->b];				
 } else								
	  cbuf1  = (((RGBColor *)colors)[cstcolors ? 0 :  index ]);		
} ;						
	r = cbuf1.r; g = cbuf1.g; b = cbuf1.b;			
	}								
 }									
 if (   0   ) {								
	if (omap) o1= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v1 ]]) , o2= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v2 ]]) , o3= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  v3 ]]) ;		
	else {								
	
{									
 if (obyte)								
   o1  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v1 ]];  
 else								
   o1  = (((float *)opacities)[xf->ocst ? 0 :  v1 ]);			
} ; 
{									
 if (obyte)								
   o2  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v2 ]];  
 else								
   o2  = (((float *)opacities)[xf->ocst ? 0 :  v2 ]);			
} ; 
{									
 if (obyte)								
   o3  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  v3 ]];  
 else								
   o3  = (((float *)opacities)[xf->ocst ? 0 :  v3 ]);			
} ;			
	}								
 } else if (opacities||omap) {					
	if (omap) o= (omap[((unsigned char *)opacities)[xf->ocst ? 0 :  index ]]) ;				    	
	else      
{									
 if (obyte)								
   o  = _dxd_ubyteToFloat[((ubyte *)opacities)[xf->ocst ? 0 :  index ]];  
 else								
   o  = (((float *)opacities)[xf->ocst ? 0 :  index ]);			
} ;					
	obar = 1.0-o;							
 } else								
	o = 1.0, obar = 0.0;						
	
  							
 if (   0   ) {							
	dxr = (r1 == r2 && r1 == r3) ? 0.0 : d1*r1 + d2*r2 + d3*r3;	
	dxg = (g1 == g2 && g1 == g3) ? 0.0 : d1*g1 + d2*g2 + d3*g3;	
	dxb = (b1 == b2 && b1 == b3) ? 0.0 : d1*b1 + d2*b2 + d3*b3;	
 }									
 if (   0   ) dxo = (o1 == o2 && o1 == o3) ? 0.0 : d1*o1 + d2*o2 + d3*o3;
 dxz = (z1 == z2 && z1 == z3) ? 0.0 : d1*z1 + d2*z2 + d3*z3;		
	
  		
 {	
 if ( y2  <  y1 ) {							
	(d=  y1  ,   y1  =  y2  ,   y2  =d) , (d=  x1  ,   x1  =  x2  ,   x2  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r2  ,   r2  =d) , (d=  g1  ,   g1  =  g2  ,   g2  =d) , (d=  b1  ,   b1  =  b2  ,   b2  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o2  ,   o2  =d) ;						
	(d=  z1  ,   z1  =  z2  ,   z2  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y1 ) {							
	(d=  y1  ,   y1  =  y3  ,   y3  =d) , (d=  x1  ,   x1  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r1  ,   r1  =  r3  ,   r3  =d) , (d=  g1  ,   g1  =  g3  ,   g3  =d) , (d=  b1  ,   b1  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o1  ,   o1  =  o3  ,   o3  =d) ;						
	(d=  z1  ,   z1  =  z3  ,   z3  =d) ;							
 }									
} 		
 {	
 if ( y3  <  y2 ) {							
	(d=  y2  ,   y2  =  y3  ,   y3  =d) , (d=  x2  ,   x2  =  x3  ,   x3  =d) ;						
	if (    0    ) (d=  r2  ,   r2  =  r3  ,   r3  =d) , (d=  g2  ,   g2  =  g3  ,   g3  =d) , (d=  b2  ,   b2  =  b3  ,   b3  =d) ;			
	if (    0    ) (d=  o2  ,   o2  =  o3  ,   o3  =d) ;						
	(d=  z2  ,   z2  =  z3  ,   z3  =d) ;							
 }									
} 		
	
  					
  	
 if (    					0  ) {								
	A = B = x1;							
	if (x2<A) A = x2; else B = x2;					
 if (x3<A) A = x3; else if (x3>B) B = x3;			
	if (A<buf->fmin.x) buf->fmin.x = A;				
	if (B>buf->fmax.x) buf->fmax.x = B;				
	if (y1<buf->fmin.y) buf->fmin.y = y1;				
	if (y3>buf->fmax.y) buf->fmax.y = y3;				
 }									
	
  					
 iy1 = ((int)(( y1 )-30000.0)+30000) , iy2 = ((int)(( y2 )-30000.0)+30000) , iy3 = ((int)(( y3 )-30000.0)+30000) ;			
 if (iy1>iy2 || iy2>iy3) {						
	DXSetError(ERROR_INVALID_DATA,					
	"position number %d, %d, or %d is invalid", v1, v2, v3);	
	return NULL;							
 }									
 if (iy1==iy3)					 	
	goto CAT(   qfob  ,  2 );  
	
  							
 d = y3 - y1;							
 Qy = d? (float)1.0 / (float)d : 0.0;				
 if (   0   ) dyr=(r3-r1)*Qy, dyg=(g3-g1)*Qy, dyb=(b3-b1)*Qy;		
 if (   0   ) dyo = (float)(o3-o1) * Qy;					
 dyz = (z3-z1) * Qy;							
 dyA = (float)(x3-x1) * Qy; 						
	
  						
 A = x1;								
 pp = buf->   u.big   + iy1*width;					   	
	
  			
 d = iy1 - y1;							
 if (iy1<0)								
	d-=iy1, pp=buf->   u.big  ;					   	
 A += dyA*d;								
 if (   0   ) r1+=dyr*d, g1+=dyg*d, b1+=dyb*d;				
 if (   0   ) o1+=dyo*d;							
 z1 += dyz*d;							
	
  				
 nn = 0;								
 {	
	
 if (  iy2 >height)							
	  iy2  = height;							
 if ( iy1 <  iy2  &&   iy2 >0 &&  iy1 <=height) {				
	B =   x1 ;								
	d =   y2  -   y1 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x2 -  x1 ) * d;					
	if ( iy1 <0)  iy1 =0;						
	d =  iy1  -   y1 ;							
	B += d*dyB;							
	for (iy= iy1 ; iy<  iy2 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 {	
	
 if (  iy3 >height)							
	  iy3  = height;							
 if ( iy2 <  iy3  &&   iy3 >0 &&  iy2 <=height) {				
	B =   x2 ;								
	d =   y3  -   y2 ;							
	d = d? (float)1.0 / (float)d : 0.0;				
	dyB = (float)(  x3 -  x2 ) * d;					
	if ( iy2 <0)  iy2 =0;						
	d =  iy2  -   y2 ;							
	B += d*dyB;							
	for (iy= iy2 ; iy<  iy3 ; iy++) {					
	iA = ((int)(( A )-30000.0)+30000) ;						
	iB = ((int)(( B )-30000.0)+30000) ;						
	if (iB>iA) left=iA, right=iB;				
	else left=iB, right=iA;					
	if (left<0) left=0;						
	if (right>width) right=width;				
	n = right - left;						
	if (n>0) {							
	nn += n;						
	p = pp+left;						
	d = left - A;						
	if (     0    ) r=r1+d*dxr, g=g1+d*dxg, b=b1+d*dxb;		
	if (     0    ) o=o1+d*dxo, obar=1.0-o;			
	z=z1+d*dxz;						
	while (--n>=0) {					
	if (     (z>p->z)    ) {						
	     {	p->c.r=r; p->c.g=g; p->c.b=b; p->z=z; }    ;						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	} else {						
	if (     0    ) r+=dxr, g+=dxg, b+=dxb;		
	if (     0    ) o+=dxo, obar=1.0-o;			
	z+=dxz;						
	p++;						
	}							
	}							
	}								
	if (     0    ) r1+=dyr, g1+=dyg, b1+=dyb;			
	if (     0    ) o1+=dyo;						
	z1 += dyz;							
	A+=dyA, B+=dyB;						
	pp+=width;							
	}								
 }									
} 		
 buf->pixels += nn;							
} ;
	
 CAT( qfob ,2) :								    
	continue;							    
 }									    
} ;
    } else {
	DXSetError(ERROR_INTERNAL, "unknown pix_type %d", buf->pix_type);
	return ERROR;
    }
	return OK;					
 } 
 
Error
_dxf_QuadFlat(
    struct buffer *buf,
    struct xfield *xf,
    int nquad,
    Quadrilateral *quad,
    int *indices,
    Pointer fcolors,
    Pointer bcolors,
    Pointer opacities,
    int surface,
    int clip_status,
    inv_stat invalid_status
) {
    
 RGBColor *c1, *c2, *c3;						    
 float x1, y1, x2, y2, x3, y3;					    
 float r1, g1, b1, o1, z1, r2, g2, b2, o2, z2, r3, g3, b3, o3, z3;	    
 float Qx, dxo, dxz, dxr, dxg, dxb;					    
 float Qy, dyr, dyg, dyb, dyo, dyz, dyA, dyB;			    
 float r, g, b, o, obar, z, nearPlane=xf->nearPlane;			    
 float A, B, d, d1, d2, d3;						    
 int iy1, iy2, iy3;							    
 int iA, iB, iy, i, n, nn, left, right;				    
 float minx = buf->min.x, miny = buf->min.y;				    
 float maxx = buf->max.x, maxy = buf->max.y ;
    RGBColor *cmap = xf->cmap;
    float *omap = xf->omap;
    char fbyte = xf->fbyte, bbyte = xf->bbyte;
    char obyte = xf->obyte;
    if (xf->tile.perspective) {
	struct xfield xx;
	for (i=0; i<nquad; ) {
	    i = _dxf_zclip_quads(xf, (int *)quad, i, indices, nquad, &xx, invalid_status);
	    if (xx.nconnections)
		_dxf_TriangleFlat(buf, &xx, xx.nconnections, xx.c.triangles,
			      xx.indices, xx.fcolors, xx.bcolors, xx.opacities,
			      surface, clip_status, invalid_status);
	}
    }
    if (xf->ct!=ct_triangles && xf->ct!=ct_quads)
	return quad_flat_vol(buf, xf, nquad, quad, indices,
			    fcolors, bcolors, opacities,
			    surface, clip_status, invalid_status);
    else if (xf->opacities)
	return quad_flat_translucent(buf, xf, nquad, quad, indices,
				    fcolors, bcolors, opacities,
				    surface, clip_status, invalid_status);
    else
	return quad_flat_opaque(buf, xf, nquad, quad, indices,
			       fcolors, bcolors, opacities,
			       surface, clip_status, invalid_status);
}