68 |
|
r->gecc = seccg; |
69 |
|
r->slights = NULL; |
70 |
|
} else { /* spawned ray */ |
71 |
< |
if (ro->rot >= FHUGE) { |
71 |
> |
if (ro->rot >= FHUGE*.99) { |
72 |
|
memset(r, 0, sizeof(RAY)); |
73 |
|
return(-1); /* illegal continuation */ |
74 |
|
} |
116 |
|
if (photonMapping && rt != TRANS) |
117 |
|
return(-1); |
118 |
|
} |
119 |
< |
if (maxdepth <= 0 && rc != NULL) { /* Russian roulette */ |
119 |
> |
if ((maxdepth <= 0) & (rc != NULL)) { /* Russian roulette */ |
120 |
|
if (minweight <= 0.0) |
121 |
|
error(USER, "zero ray weight in Russian roulette"); |
122 |
< |
if (maxdepth < 0 && r->rlvl > -maxdepth) |
122 |
> |
if ((maxdepth < 0) & (r->rlvl > -maxdepth)) |
123 |
|
return(-1); /* upper reflection limit */ |
124 |
|
if (r->rweight >= minweight) |
125 |
|
return(0); |
130 |
|
r->rweight = minweight; |
131 |
|
return(0); |
132 |
|
} |
133 |
< |
return(r->rweight >= minweight && r->rlvl <= abs(maxdepth) ? 0 : -1); |
133 |
> |
return((r->rweight >= minweight) & (r->rlvl <= abs(maxdepth)) ? 0 : -1); |
134 |
|
} |
135 |
|
|
136 |
|
|
146 |
|
r->ro = NULL; |
147 |
|
r->rox = NULL; |
148 |
|
r->rxt = r->rmt = r->rot = FHUGE; |
149 |
+ |
VCOPY(r->rop, r->rorg); |
150 |
+ |
r->ron[0] = -r->rdir[0]; r->ron[1] = -r->rdir[1]; r->ron[2] = -r->rdir[2]; |
151 |
+ |
r->rod = 1.0; |
152 |
|
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
153 |
+ |
r->rflips = 0; |
154 |
|
r->uv[0] = r->uv[1] = 0.0; |
155 |
|
setcolor(r->pcol, 1.0, 1.0, 1.0); |
156 |
|
setcolor(r->mcol, 0.0, 0.0, 0.0); |
217 |
|
raytrans(r); |
218 |
|
return(1); |
219 |
|
} |
220 |
< |
if (!islight(m->otype)) |
220 |
> |
if (!islight(m->otype)) { |
221 |
> |
setcolor(r->pcol, 1.0, 1.0, 1.0); |
222 |
|
return((*ofun[Lamb.otype].funp)(&Lamb, r)); |
223 |
+ |
} |
224 |
|
} |
225 |
|
return(0); /* not a qualifying surface */ |
226 |
|
} |
235 |
|
int tst_irrad = do_irrad && !(r->crtype & ~(PRIMARY|TRANS)); |
236 |
|
OBJREC *m; |
237 |
|
|
238 |
< |
r->rxt = r->rmt = r->rot; /* preset effective ray length */ |
238 |
> |
r->rxt = r->rot; /* preset effective ray length */ |
239 |
|
for ( ; mod != OVOID; mod = m->omod) { |
240 |
|
m = objptr(mod); |
241 |
|
/****** unnecessary test since modifier() is always called |
409 |
|
int flags |
410 |
|
) |
411 |
|
{ |
412 |
+ |
static int warnedPM = 0; |
413 |
+ |
|
414 |
|
rc[0] = rc[1] = rc[2] = 1.; |
415 |
|
|
416 |
|
while (r != NULL && r->crtype&flags) { |
417 |
|
int i = 3; |
418 |
|
while (i--) |
419 |
|
rc[i] *= colval(r->rcoef,i); |
420 |
+ |
/* check for participating medium */ |
421 |
+ |
if (!warnedPM && (bright(r->cext) > FTINY) | |
422 |
+ |
(bright(r->albedo) > FTINY)) { |
423 |
+ |
error(WARNING, |
424 |
+ |
"ray contribution calculation does not support participating media"); |
425 |
+ |
warnedPM++; |
426 |
+ |
} |
427 |
|
r = r->parent; |
428 |
|
} |
429 |
|
} |
515 |
|
r->pert[0] = -r->pert[0]; |
516 |
|
r->pert[1] = -r->pert[1]; |
517 |
|
r->pert[2] = -r->pert[2]; |
518 |
+ |
r->rflips++; |
519 |
|
} |
520 |
|
|
521 |
+ |
|
522 |
+ |
int |
523 |
+ |
rayreject( /* check if candidate hit is worse than current */ |
524 |
+ |
OBJREC *o, |
525 |
+ |
RAY *r, |
526 |
+ |
double t, |
527 |
+ |
double rod |
528 |
+ |
) |
529 |
+ |
{ |
530 |
+ |
OBJREC *mnew, *mray; |
531 |
+ |
|
532 |
+ |
if ((t <= FTINY) | (t > r->rot + FTINY)) |
533 |
+ |
return(1); |
534 |
+ |
if (t < r->rot - FTINY) /* is new hit significantly closer? */ |
535 |
+ |
return(0); |
536 |
+ |
/* coincident point, so decide... */ |
537 |
+ |
if (o == r->ro) |
538 |
+ |
return(1); /* shouldn't happen */ |
539 |
+ |
if (r->ro == NULL) |
540 |
+ |
return(0); /* ditto */ |
541 |
+ |
mnew = findmaterial(o); |
542 |
+ |
mray = findmaterial(r->ro); /* check material transparencies */ |
543 |
+ |
if (mnew == NULL) { |
544 |
+ |
if (mray != NULL) |
545 |
+ |
return(1); /* old has material, new does not */ |
546 |
+ |
} else if (mray == NULL) { |
547 |
+ |
return(0); /* new has material, old does not */ |
548 |
+ |
} else if (istransp(mnew->otype)) { |
549 |
+ |
if (!istransp(mray->otype)) |
550 |
+ |
return(1); /* new is transparent, old is not */ |
551 |
+ |
} else if (istransp(mray->otype)) { |
552 |
+ |
return(0); /* old is transparent, new is not */ |
553 |
+ |
} |
554 |
+ |
if (rod <= 0) { /* check which side we hit */ |
555 |
+ |
if (r->rod > 0) |
556 |
+ |
return(1); /* old hit front, new did not */ |
557 |
+ |
} else if (r->rod <= 0) { |
558 |
+ |
return(0); /* new hit front, old did not */ |
559 |
+ |
} |
560 |
+ |
/* earlier modifier definition wins tie */ |
561 |
+ |
return (r->ro->omod >= o->omod); |
562 |
+ |
} |
563 |
|
|
564 |
|
void |
565 |
|
rayhit( /* standard ray hit test */ |