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root/Development/ray/src/rt/raytrace.c
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Comparing ray/src/rt/raytrace.c (file contents):
Revision 2.60 by greg, Sat Dec 12 00:03:42 2009 UTC vs.
Revision 2.62 by greg, Mon Oct 25 22:57:45 2010 UTC

# Line 512 | Line 512 | localhit(              /* check for hit in the octree */
512                  else if (r->rdir[i] < -1e-7)
513                          sflags |= 0x10 << i;
514          }
515 <        if (sflags == 0)
516 <                error(CONSISTENCY, "zero ray direction in localhit");
515 >        if (!sflags) {
516 >                error(WARNING, "zero ray direction in localhit");
517 >                return(0);
518 >        }
519                                          /* start off assuming nothing hit */
520          if (r->rmax > FTINY) {          /* except aft plane if one */
521                  r->ro = &Aftplane;
522                  r->rot = r->rmax;
523 <                for (i = 0; i < 3; i++)
522 <                        r->rop[i] = r->rorg[i] + r->rot*r->rdir[i];
523 >                VSUM(r->rop, r->rorg, r->rdir, r->rot);
524          }
525                                          /* find global cube entrance point */
526          t = 0.0;
# Line 542 | Line 543 | localhit(              /* check for hit in the octree */
543                  if (t >= r->rot)        /* clipped already */
544                          return(0);
545                                          /* advance position */
546 <                for (i = 0; i < 3; i++)
546 <                        curpos[i] += r->rdir[i]*t;
546 >                VSUM(curpos, curpos, r->rdir, t);
547  
548                  if (!incube(scene, curpos))     /* non-intersecting ray */
549                          return(0);
# Line 634 | Line 634 | raymove(               /* check for hit as we move */
634                          ax = 2;
635                  }
636          }
637 <        pos[0] += r->rdir[0]*t;
638 <        pos[1] += r->rdir[1]*t;
639 <        pos[2] += r->rdir[2]*t;
637 >        VSUM(pos, pos, r->rdir, t);
638          return(ax);
639   }
640  

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