/*
* polyobj
*
* construct a polygon from a object token list.
*/
void
polyobj(int n, Token *dp, int fill)
{
int i, j;
float vect[4], result[4];
for (i = 0, j = 0; i < n; i++, j += 3) {
vect[V_X] = dp[j + V_X].f;
vect[V_Y] = dp[j + V_Y].f;
vect[V_Z] = dp[j + V_Z].f;
vect[V_W] = 1;
multvector(result, vect, vdevice.transmat->m);
p[i][V_X] = result[V_X];
p[i][V_Y] = result[V_Y];
p[i][V_Z] = result[V_Z];
p[i][V_W] = result[V_W];
}
if (fill)
vdevice.fill = polymodeflag;
else
vdevice.fill = 0;
dopoly(n);
vdevice.cpW[V_X] = dp[V_X].f;
vdevice.cpW[V_Y] = dp[V_Y].f;
vdevice.cpW[V_Z] = dp[V_Z].f;
}
/*
* pclos
*
* draw the polygon started by the above.
*/
void
pclos(void)
{
float lstx, lsty, lstz;
Vector result;
int i, j;
Token *tok;
if (!vdevice.initialised)
verror("pclos: vogl not initialised");
vdevice.inpolygon = 0;
if (vdevice.inobject) {
tok = newtokens(2 + 3 * (numv + 1));
tok[0].i = POLYF;
tok[1].i = numv + 1;
for (i = 0, j = 2; i <= numv; i++, j += 3) {
tok[j + V_X].f = p[i][V_X];
tok[j + V_Y].f = p[i][V_Y];
tok[j + V_Z].f = p[i][V_Z];
}
return;
}
lstx = p[numv][V_X];
lsty = p[numv][V_Y];
lstz = p[numv][V_Z];
numv++;
for (i = 0; i < numv; i++) {
multvector(result, p[i], vdevice.transmat->m);
p[i][V_X] = result[V_X];
p[i][V_Y] = result[V_Y];
p[i][V_Z] = result[V_Z];
p[i][V_W] = result[V_W];
}
dopoly(numv);
vdevice.cpW[V_X] = lstx;
vdevice.cpW[V_Y] = lsty;
vdevice.cpW[V_Z] = lstz;
}
/*
* polf
*
* construct a filled polygon from an array of points provided
* by the user.
*/
void
polf(long int nv, float (*dp)[3])
{
int i, j;
Vector vect, result;
Token *tok;
long n = nv;
if (!vdevice.initialised)
verror("poly: vogl not initialised");
vdevice.fill = polymodeflag;
if (vdevice.inobject) {
tok = newtokens(2 + 3 * n);
tok[0].i = POLYF;
tok[1].i = n;
for (i = 0, j = 2; i < n; i++, j += 3) {
tok[j + V_X].f = dp[i][V_X];
tok[j + V_Y].f = dp[i][V_Y];
tok[j + V_Z].f = dp[i][V_Z];
}
return;
}
for (i = 0; i < n; i++) {
vect[V_X] = dp[i][V_X];
vect[V_Y] = dp[i][V_Y];
vect[V_Z] = dp[i][V_Z];
vect[V_W] = 1;
multvector(result, vect, vdevice.transmat->m);
p[i][V_X] = result[V_X];
p[i][V_Y] = result[V_Y];
p[i][V_Z] = result[V_Z];
p[i][V_W] = result[V_W];
}
dopoly(n);
vdevice.cpW[V_X] = dp[0][V_X];
vdevice.cpW[V_Y] = dp[0][V_Y];
vdevice.cpW[V_Z] = dp[0][V_Z];
vdevice.fill = 0;
}
main() {
dopoly(x, y, ARRSIZE(x));
printf("Done.\n");
return 0;
}
void
fillpolyop(Image *dst, Point *p, int np, int wind, Image *src, Point sp, Drawop op)
{
dopoly('P', dst, p, np, wind, 0, 0, src, &sp, op);
}
void
fillpoly(Image *dst, Point *p, int np, int wind, Image *src, Point sp)
{
dopoly('P', dst, p, np, wind, 0, 0, src, &sp, SoverD);
}
void
polyop(Image *dst, Point *p, int np, int end0, int end1, int radius, Image *src, Point sp, Drawop op)
{
dopoly('p', dst, p, np, end0, end1, radius, src, &sp, op);
}
void
poly(Image *dst, Point *p, int np, int end0, int end1, int radius, Image *src, Point sp)
{
dopoly('p', dst, p, np, end0, end1, radius, src, &sp, SoverD);
}
