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root/Development/ray/src/common/spec_rgb.c
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Comparing ray/src/common/spec_rgb.c (file contents):
Revision 2.9 by greg, Thu Apr 17 15:42:02 1997 UTC vs.
Revision 2.10 by gwlarson, Wed Oct 7 17:11:40 1998 UTC

# Line 10 | Line 10 | static char SCCSid[] = "$SunId$ LBL";
10  
11   #include "color.h"
12  
13 + #define CEPS    1e-7                    /* color epsilon */
14  
15 +
16   RGBPRIMS  stdprims = STDPRIMS;          /* standard primary chromaticities */
17  
18   COLOR  cblack = BLKCOLOR;               /* global black color */
# Line 151 | Line 153 | COLOR  lower, upper;
153          vv = 1.;                        /* check each limit */
154          for (i = 0; i < 3; i++)
155                  if (gamut & CGAMUT_LOWER && col[i] < lower[i]) {
156 <                        v = (lower[i] - cgry[i])/(col[i] - cgry[i]);
156 >                        v = (lower[i]+CEPS - cgry[i])/(col[i] - cgry[i]);
157                          if (v < vv) vv = v;
158                          rflags |= CGAMUT_LOWER;
159                  } else if (gamut & CGAMUT_UPPER && col[i] > upper[i]) {
160 <                        v = (upper[i] - cgry[i])/(col[i] - cgry[i]);
160 >                        v = (upper[i]-CEPS - cgry[i])/(col[i] - cgry[i]);
161                          if (v < vv) vv = v;
162                          rflags |= CGAMUT_UPPER;
163                  }

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