static int clip_poly(float src[MAXV][MAXN],
float dst[MAXV][MAXN], int len, int n,
float val, int isy, int ismax)
{
float cv1[MAXN];
float cv2[MAXN];
int v1, v2, cp;
int r;
v1 = len - 1;
cp = 0;
for (v2 = 0; v2 < len; v2++)
{
copy_vert(cv1, src[v1], n);
copy_vert(cv2, src[v2], n);
if (isy)
r = clipy(val, ismax, cv1, cv2, n);
else
r = clipx(val, ismax, cv1, cv2, n);
switch (r)
{
case IN:
copy_vert(dst[cp++], cv2, n);
break;
case OUT:
break;
case LEAVE:
copy_vert(dst[cp++], cv2, n);
break;
case ENTER:
copy_vert(dst[cp++], cv1, n);
copy_vert(dst[cp++], cv2, n);
break;
}
v1 = v2;
}
return cp;
}
static int clip_poly(float src[MAXV][MAXN],
float dst[MAXV][MAXN], int len, int n,
float val, int isy, int ismax)
{
int v1, v2, cp;
v1 = len - 1;
cp = 0;
if (isy)
for (v2 = 0; v2 < len; v2++)
{
cp += clipy(val, ismax, src[v1], src[v2], n, dst[cp]);
v1 = v2;
}
else
for (v2 = 0; v2 < len; v2++)
{
cp += clipx(val, ismax, src[v1], src[v2], n, dst[cp]);
v1 = v2;
}
return cp;
}
long cOBJECT::Clipper2(POLYGON *poly,VECTOR *TVectors, long minx,long maxx,long miny)
{
long v1,v2;
int i;
long current=0;
v1=poly->NumVectors-1;
v2=0;
for (i=0;i<poly->NumVectors;i++)
{
if (TVectors[poly->VectorIndex[v1]].x>minx)
{
if (TVectors[poly->VectorIndex[v2]].x>minx)
{
if (TVectors[poly->VectorIndex[v1]].x<maxx)
{
if (TVectors[poly->VectorIndex[v2]].x<maxx)
{
poly->ClippedVectorIndex[current]=poly->VectorIndex[v1];
poly->ClippedLightPoints[current]=poly->LightPoints[v1];
current++;
}
else
{
poly->ClippedVectorIndex[current]=poly->VectorIndex[v1];
poly->ClippedLightPoints[current]=poly->LightPoints[v1];
current++;
clipx(poly,TVectors,v1,v2,current,maxx);
current++;
}
}
else
{
if (TVectors[poly->VectorIndex[v2]].x<maxx)
{
clipx(poly,TVectors,v1,v2,current,maxx);
current++;
}
}
}
else
{
poly->ClippedVectorIndex[current]=poly->VectorIndex[v1];
poly->ClippedLightPoints[current]=poly->LightPoints[v1];
current++;
clipx(poly,TVectors,v1,v2,current,0);
current++;
}
}
else
{
if (TVectors[poly->VectorIndex[v2]].x>minx)
{
if (TVectors[poly->VectorIndex[v2]].x>maxx)
{
clipx(poly,TVectors,v1,v2,current,maxx);
current++;
}
clipx(poly,TVectors,v1,v2,current,0);
current++;
}
}
v1=v2;
v2++;
}
poly->ClippedNumVectors=current;
return 0;
}
