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Comparing ray/src/rt/ambcomp.c (file contents):
Revision 2.19 by greg, Mon Aug 22 16:07:26 2005 UTC vs.
Revision 2.22 by greg, Sun Sep 26 15:51:15 2010 UTC

# Line 28 | Line 28 | inithemi(                      /* initialize sampling hemisphere */
28          register int  i;
29                                          /* set number of divisions */
30          if (ambacc <= FTINY &&
31 <                        wt > (d = 0.8*bright(ac)*r->rweight/(ambdiv*minweight)))
31 >                        wt > (d = 0.8*intens(ac)*r->rweight/(ambdiv*minweight)))
32                  wt = d;                 /* avoid ray termination */
33          hp->nt = sqrt(ambdiv * wt / PI) + 0.5;
34          i = ambacc > FTINY ? 3 : 1;     /* minimum number of samples */
# Line 94 | Line 94 | divsample(                             /* sample a division */
94                  ar.rdir[i] =    xd*h->ux[i] +
95                                  yd*h->uy[i] +
96                                  zd*h->uz[i];
97 +        checknorm(ar.rdir);
98          dimlist[ndims++] = dp->t*h->np + dp->p + 90171;
99          rayvalue(&ar);
100          ndims--;
# Line 204 | Line 205 | doambient(                             /* compute ambient component */
205                          else
206                                  addcolor(acol, dp->v);
207                  }
208 <        if (!divcnt)
208 >        if (!divcnt) {
209 >                if (div != NULL)
210 >                        free((void *)div);
211                  return(0.0);            /* no samples taken */
212 +        }
213          if (divcnt < hemi.nt*hemi.np) {
214                  pg = dg = NULL;         /* incomplete sampling */
215                  hemi.ns = 0;

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