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root/Development/ray/src/cv/bsdfquery.c
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Comparing ray/src/cv/bsdfquery.c (file contents):
Revision 2.8 by greg, Mon Feb 6 23:21:32 2017 UTC vs.
Revision 2.9 by greg, Thu Apr 13 00:14:36 2017 UTC

# Line 5 | Line 5 | static const char RCSid[] = "$Id$";
5   *  Query values from the given BSDF (scattering interpolant or XML repres.)
6   *  Input query is incident and exiting vectors directed away from surface.
7   *  We normalize.  Output is a BSDF value for the vector pair.
8 + *  A zero length in or out vector is ignored, causing output to be flushed.
9   *  It is wise to sort the input directions to keep identical ones together
10   *  when using a scattering interpolant representation.
11   */
# Line 25 | Line 26 | readIOdir(FVECT idir, FVECT odir, FILE *fp, int fmt)
26   {
27          double  dvec[6];
28          float   fvec[6];
29 <
29 > tryagain:
30          switch (fmt) {
31          case 'a':
32                  if (fscanf(fp, FVFORMAT, &idir[0], &idir[1], &idir[2]) != 3 ||
# Line 46 | Line 47 | readIOdir(FVECT idir, FVECT odir, FILE *fp, int fmt)
47                  break;
48          }
49          if ((normalize(idir) == 0) | (normalize(odir) == 0)) {
50 <                fprintf(stderr, "%s: zero input vector!\n", progname);
51 <                return(0);
50 >                fflush(stdout);         /* desired side-effect? */
51 >                goto tryagain;
52          }
53          return(1);
54   }

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