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Comparing ray/src/rt/raytrace.c (file contents):
Revision 2.78 by greg, Wed Apr 3 16:04:33 2019 UTC vs.
Revision 2.82 by greg, Mon Jan 4 19:07:15 2021 UTC

# Line 68 | Line 68 | rayorigin(             /* start new ray from old one */
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                  }
# Line 146 | Line 146 | rayclear(                      /* clear a ray for (re)evaluation */
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);
# Line 509 | Line 513 | flipsurface(                   /* reverse surface orientation */
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  

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