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root/Development/ray/src/gen/gensky.c
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Comparing ray/src/gen/gensky.c (file contents):
Revision 1.1 by greg, Thu Feb 2 11:16:29 1989 UTC vs.
Revision 1.2 by greg, Fri Jul 21 21:17:42 1989 UTC

# Line 133 | Line 133 | computesky()                   /* compute sky parameters */
133                          zenithbr = (1.376*turbidity-1.81)*tan(altitude)+0.38;
134                          zenithbr *= 1000.0/683.0;
135                  }
136 +        if (zenithbr < 0.0)
137 +                zenithbr = 0.0;
138                                          /* Compute horizontal radiance */
139          if (cloudy) {
140                  groundbr = zenithbr*0.777778;

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