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; |
155 |
|
setcolor(r->pcol, 1.0, 1.0, 1.0); |
156 |
|
setcolor(r->mcol, 0.0, 0.0, 0.0); |
233 |
|
int tst_irrad = do_irrad && !(r->crtype & ~(PRIMARY|TRANS)); |
234 |
|
OBJREC *m; |
235 |
|
|
236 |
< |
r->rxt = r->rmt = r->rot; /* preset effective ray length */ |
236 |
> |
r->rxt = r->rot; /* preset effective ray length */ |
237 |
|
for ( ; mod != OVOID; mod = m->omod) { |
238 |
|
m = objptr(mod); |
239 |
|
/****** unnecessary test since modifier() is always called |
513 |
|
r->pert[0] = -r->pert[0]; |
514 |
|
r->pert[1] = -r->pert[1]; |
515 |
|
r->pert[2] = -r->pert[2]; |
516 |
+ |
r->rflips++; |
517 |
|
} |
518 |
|
|
519 |
+ |
|
520 |
+ |
int |
521 |
+ |
rayreject( /* check if candidate hit is worse than current */ |
522 |
+ |
OBJREC *o, |
523 |
+ |
RAY *r, |
524 |
+ |
double t |
525 |
+ |
) |
526 |
+ |
{ |
527 |
+ |
OBJREC *mnew, *mray; |
528 |
+ |
|
529 |
+ |
if ((t <= FTINY) | (t > r->rot + FTINY)) |
530 |
+ |
return 1; |
531 |
+ |
if (t < r->rot - FTINY) /* is new hit significantly closer? */ |
532 |
+ |
return 0; |
533 |
+ |
/* coincident, so decide... */ |
534 |
+ |
if (o == r->ro) |
535 |
+ |
return 1; /* shouldn't happen */ |
536 |
+ |
if (r->ro == NULL) |
537 |
+ |
return 0; /* ditto */ |
538 |
+ |
if ((mnew = findmaterial(o)) == NULL) |
539 |
+ |
return 1; /* new has no material */ |
540 |
+ |
if ((mray = findmaterial(r->ro)) == NULL) |
541 |
+ |
return 0; /* old has no material(!) */ |
542 |
+ |
if (istransp(mnew->otype)) |
543 |
+ |
return 1; /* new is transparent */ |
544 |
+ |
|
545 |
+ |
return !istransp(mray->otype); /* reject unless old is */ |
546 |
+ |
} |
547 |
|
|
548 |
|
void |
549 |
|
rayhit( /* standard ray hit test */ |