496 |
|
cc[i] = c1[i] + l*disp[i]; |
497 |
|
return(a2); |
498 |
|
} |
499 |
– |
|
500 |
– |
|
501 |
– |
sourcehit(r) /* check to see if ray hit distant source */ |
502 |
– |
register RAY *r; |
503 |
– |
{ |
504 |
– |
int first, last; |
505 |
– |
register int i; |
506 |
– |
|
507 |
– |
if (r->rsrc >= 0) { /* check only one if aimed */ |
508 |
– |
first = last = r->rsrc; |
509 |
– |
} else { /* otherwise check all */ |
510 |
– |
first = 0; last = nsources-1; |
511 |
– |
} |
512 |
– |
for (i = first; i <= last; i++) |
513 |
– |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
514 |
– |
/* |
515 |
– |
* Check to see if ray is within |
516 |
– |
* solid angle of source. |
517 |
– |
*/ |
518 |
– |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
519 |
– |
<= source[i].ss2) { |
520 |
– |
r->ro = source[i].so; |
521 |
– |
if (!(source[i].sflags & SSKIP)) |
522 |
– |
break; |
523 |
– |
} |
524 |
– |
|
525 |
– |
if (r->ro != NULL) { |
526 |
– |
for (i = 0; i < 3; i++) |
527 |
– |
r->ron[i] = -r->rdir[i]; |
528 |
– |
r->rod = 1.0; |
529 |
– |
r->rox = NULL; |
530 |
– |
return(1); |
531 |
– |
} |
532 |
– |
return(0); |
533 |
– |
} |