22 |
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23 |
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extern double ssampdist; /* scatter sampling distance */ |
24 |
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|
25 |
+ |
#ifndef MAXSSAMP |
26 |
+ |
#define MAXSSAMP 16 /* maximum samples per ray */ |
27 |
+ |
#endif |
28 |
+ |
|
29 |
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/* |
30 |
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* Structures used by direct() |
31 |
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*/ |
337 |
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( sr.ro != source[scp->sno].so || |
338 |
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source[scp->sno].sflags & SFOLLOW )) { |
339 |
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/* follow entire path */ |
340 |
< |
if (!raycont(&sr)) |
337 |
< |
objerror(sr.ro, USER, "material not found"); |
340 |
> |
raycont(&sr); |
341 |
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rayparticipate(&sr); |
342 |
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if (trace != NULL) |
343 |
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(*trace)(&sr); /* trace execution */ |
385 |
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COLOR cumval, ctmp; |
386 |
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int i, j; |
387 |
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|
388 |
< |
if (r->slights == NULL || r->slights[0] == 0 || r->gecc >= 1.-FTINY) |
388 |
> |
if (r->slights == NULL || r->slights[0] == 0 |
389 |
> |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
390 |
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return; |
391 |
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if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
392 |
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nsamps = 1; |
393 |
+ |
#if MAXSSAMP |
394 |
+ |
else if (nsamps > MAXSSAMP) |
395 |
+ |
nsamps = MAXSSAMP; |
396 |
+ |
#endif |
397 |
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oldsampndx = samplendx; |
398 |
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samplendx = random()&0x7fff; /* randomize */ |
391 |
– |
initsrcindex(&si); |
399 |
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for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
400 |
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setcolor(cumval, 0., 0., 0.); |
401 |
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lastt = r->rot; |
406 |
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sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
407 |
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sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
408 |
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sr.rmax = 0.; |
409 |
< |
/* sample ray to this source */ |
410 |
< |
if (si.sp >= si.np-1 || !srcray(&sr, NULL, &si) || |
411 |
< |
sr.rsrc != r->slights[i]) { |
412 |
< |
si.sn = r->slights[i]-1; /* reset */ |
413 |
< |
si.np = 0; |
414 |
< |
if (!srcray(&sr, NULL, &si) || |
408 |
< |
sr.rsrc != r->slights[i]) |
409 |
< |
continue; /* no path */ |
410 |
< |
} |
409 |
> |
initsrcindex(&si); /* sample ray to this source */ |
410 |
> |
si.sn = r->slights[i]; |
411 |
> |
nopart(&si, &sr); |
412 |
> |
if (!srcray(&sr, NULL, &si) || |
413 |
> |
sr.rsrc != r->slights[i]) |
414 |
> |
continue; /* no path */ |
415 |
|
copycolor(sr.cext, r->cext); |
416 |
< |
sr.albedo = r->albedo; |
416 |
> |
copycolor(sr.albedo, r->albedo); |
417 |
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sr.gecc = r->gecc; |
418 |
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rayvalue(&sr); /* eval. source ray */ |
419 |
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if (bright(sr.rcol) <= FTINY) |
433 |
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d = (1. - r->gecc*r->gecc) / (d*d*d); |
434 |
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} |
435 |
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/* other factors */ |
436 |
< |
d *= si.dom * r->albedo * r->rot / (4.*PI*nsamps); |
436 |
> |
d *= si.dom * r->rot / (4.*PI*nsamps); |
437 |
|
multcolor(sr.rcol, r->cext); |
438 |
+ |
multcolor(sr.rcol, r->albedo); |
439 |
|
scalecolor(sr.rcol, d); |
440 |
|
addcolor(cumval, sr.rcol); |
441 |
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} |