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 |
|
} |
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; |
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 |
|
} |
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 */ |