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root/radiance/ray/src/rt/raytrace.c
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Comparing ray/src/rt/raytrace.c (file contents):
Revision 1.16 by greg, Thu May 2 11:58:20 1991 UTC vs.
Revision 1.19 by greg, Fri Jun 14 10:34:26 1991 UTC

# Line 1 | Line 1
1 < /* Copyright (c) 1990 Regents of the University of California */
1 > /* Copyright (c) 1991 Regents of the University of California */
2  
3   #ifndef lint
4   static char SCCSid[] = "$SunId$ LBL";
# Line 121 | Line 121 | int  mod;
121                                          /* check for infinite loop */
122          if (depth++ >= MAXLOOP)
123                  objerror(r->ro, USER, "possible modifier loop");
124 +        r->rt = r->rot;                 /* set effective ray length */
125          for ( ; mod != OVOID; mod = m->omod) {
126                  m = objptr(mod);
127                  /****** unnecessary test since modifier() is always called
# Line 136 | Line 137 | int  mod;
137                                  raytrans(r);
138                                  return;
139                          }
140 <                        if (m->otype != MAT_ILLUM)
140 >                        if (!islight(m->otype))
141                                  m = &Lamb;
142                  }
143                  (*ofun[m->otype].funp)(m, r);   /* execute function */
# Line 322 | Line 323 | register CUBE  *scene;
323                  else if (r->rdir[i] < -FTINY)
324                          sflags |= 0x10 << i;
325          }
326 +        if (sflags == 0)
327 +                error(CONSISTENCY, "zero ray direction in localhit");
328          t = 0.0;
329          if (!incube(scene, curpos)) {
330                                          /* find distance to entry */

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