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Fix random thunder activation caused by rounding error in setup interpolation

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This commit is contained in:
kaetemi 2016-03-19 22:13:38 +01:00
parent d76dc8fe56
commit c83f467be1
1 changed files with 7 additions and 1 deletions
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8
code/nel/src/misc/bitmap.cpp
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@ -3106,11 +3106,17 @@ bool CBitmap::blit(const CBitmap *src, sint32 x, sint32 y)
// Private : // Private :
float CBitmap::getColorInterp (float x, float y, float colorInXY00, float colorInXY10, float colorInXY01, float colorInXY11) const float CBitmap::getColorInterp (float x, float y, float colorInXY00, float colorInXY10, float colorInXY01, float colorInXY11) const
{ {
if (colorInXY00 == colorInXY10
&& colorInXY00 == colorInXY01
&& colorInXY00 == colorInXY11)
return colorInXY00; // Fix rounding error for alpha 255...
float res = colorInXY00*(1.0f-x)*(1.0f-y) + float res = colorInXY00*(1.0f-x)*(1.0f-y) +
colorInXY10*( x)*(1.0f-y) + colorInXY10*( x)*(1.0f-y) +
colorInXY01*(1.0f-x)*( y) + colorInXY01*(1.0f-x)*( y) +
colorInXY11*( x)*( y); colorInXY11*( x)*( y);
clamp (res, 0.0f, 255.0f); clamp(res, 0.0f, 255.0f);
return res; return res;
} }