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root/radiance/ray/src/px/greyscale.c
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Comparing ray/src/px/greyscale.c (file contents):
Revision 2.3 by greg, Fri Jun 4 14:46:44 1993 UTC vs.
Revision 2.4 by greg, Tue Feb 14 08:55:09 1995 UTC

# Line 62 | Line 62 | char  *argv[];
62   greyscale(col0)                 /* output our grey scale */
63   COLOR  col0;
64   {
65 <        double  exp();
65 >        extern double  exp();
66          COLOR  col1, col2, scanline[512];
67          double  x;
68          int  j;

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