Mercurial > pygame
diff src/pixelarray_methods.c @ 993:78ab04b73064
Changed distance range to 0-1.
| author | marcus |
|---|---|
| date | Sat, 05 Apr 2008 13:05:41 +0000 |
| parents | 1577bcf02ed5 |
| children | 123fae0cfc2d |
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--- a/src/pixelarray_methods.c Sat Apr 05 10:46:13 2008 +0000 +++ b/src/pixelarray_methods.c Sat Apr 05 13:05:41 2008 +0000 @@ -20,11 +20,13 @@ /* Simple weighted euclidian distance, which tries to get near to the * human eye reception using the weights. + * It receives RGB values in the range 0-255 and returns a distance + * value between 0.0 and 1.0. */ #define COLOR_DIFF_RGB(r1,g1,b1,r2,g2,b2) \ (sqrt (.299 * (r1 - r2) * (r1 - r2) + \ .587 * (g1 - g2) * (g1 - g2) + \ - .114 * (b1 - b2) * (b1 - b2))) + .114 * (b1 - b2) * (b1 - b2)) / 255.0) /** @@ -338,9 +340,9 @@ &replcolor, &distance)) return NULL; - if (distance < 0 || distance > 255) + if (distance < 0 || distance > 1) return RAISE (PyExc_ValueError, - "distance must be in the range from 0.0 to 255.0"); + "distance must be in the range from 0.0 to 1.0"); surface = PySurface_AsSurface (array->surface); if (!_get_color_from_object (delcolor, surface->format, &dcolor) || @@ -527,9 +529,9 @@ &distance)) return NULL; - if (distance < 0 || distance > 255) + if (distance < 0 || distance > 1) return RAISE (PyExc_ValueError, - "distance must be in the range from 0.0 to 255.0"); + "distance must be in the range from 0.0 to 1.0"); surface = PySurface_AsSurface (array->surface); if (!_get_color_from_object (excolor, surface->format, &color))