22 |
|
|
23 |
|
extern double ssampdist; /* scatter sampling distance */ |
24 |
|
|
25 |
+ |
#ifndef MAXSSAMP |
26 |
+ |
#define MAXSSAMP 16 /* maximum samples per ray */ |
27 |
+ |
#endif |
28 |
+ |
|
29 |
|
/* |
30 |
|
* Structures used by direct() |
31 |
|
*/ |
337 |
|
( sr.ro != source[scp->sno].so || |
338 |
|
source[scp->sno].sflags & SFOLLOW )) { |
339 |
|
/* follow entire path */ |
340 |
< |
if (!raycont(&sr)) |
337 |
< |
objerror(sr.ro, USER, "material not found"); |
340 |
> |
raycont(&sr); |
341 |
|
rayparticipate(&sr); |
342 |
|
if (trace != NULL) |
343 |
|
(*trace)(&sr); /* trace execution */ |
385 |
|
COLOR cumval, ctmp; |
386 |
|
int i, j; |
387 |
|
|
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 |
|
return; |
391 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
392 |
|
nsamps = 1; |
393 |
+ |
#if MAXSSAMP |
394 |
+ |
else if (nsamps > MAXSSAMP) |
395 |
+ |
nsamps = MAXSSAMP; |
396 |
+ |
#endif |
397 |
|
oldsampndx = samplendx; |
398 |
|
samplendx = random()&0x7fff; /* randomize */ |
399 |
|
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |