| 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; |
| 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 */ |
