| 374 |
|
srcscatter(r) /* compute source scattering into ray */ |
| 375 |
|
register RAY *r; |
| 376 |
|
{ |
| 377 |
+ |
int oldsampndx; |
| 378 |
|
int nsamps; |
| 379 |
|
RAY sr; |
| 380 |
|
SRCINDEX si; |
| 386 |
|
return; |
| 387 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
| 388 |
|
nsamps = 1; |
| 389 |
< |
initsrcindex(&si); |
| 389 |
> |
oldsampndx = samplendx; |
| 390 |
> |
samplendx = random()&0x7fff; /* randomize */ |
| 391 |
|
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
| 392 |
|
setcolor(cumval, 0., 0., 0.); |
| 393 |
|
lastt = r->rot; |
| 398 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
| 399 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
| 400 |
|
sr.rmax = 0.; |
| 401 |
< |
/* sample ray to this source */ |
| 402 |
< |
if (si.sp >= si.np-1 || !srcray(&sr, NULL, &si) || |
| 403 |
< |
sr.rsrc != r->slights[i]) { |
| 404 |
< |
si.sn = r->slights[i]-1; /* reset */ |
| 405 |
< |
si.np = 0; |
| 406 |
< |
if (!srcray(&sr, NULL, &si) || |
| 405 |
< |
sr.rsrc != r->slights[i]) |
| 406 |
< |
continue; /* no path */ |
| 407 |
< |
} |
| 401 |
> |
initsrcindex(&si); /* sample ray to this source */ |
| 402 |
> |
si.sn = r->slights[i]; |
| 403 |
> |
nopart(&si, &sr); |
| 404 |
> |
if (!srcray(&sr, NULL, &si) || |
| 405 |
> |
sr.rsrc != r->slights[i]) |
| 406 |
> |
continue; /* no path */ |
| 407 |
|
copycolor(sr.cext, r->cext); |
| 408 |
|
sr.albedo = r->albedo; |
| 409 |
|
sr.gecc = r->gecc; |
| 437 |
|
multcolor(cumval, ctmp); |
| 438 |
|
addcolor(r->rcol, cumval); /* sum into ray result */ |
| 439 |
|
} |
| 440 |
+ |
samplendx = oldsampndx; |
| 441 |
|
} |
| 442 |
|
|
| 443 |
|
|
