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Allows negative light to result in negative diffuse and 'combined'

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when you have world exposure set. (it used to clip it in 0-1, now it
mirrors the values)
This commit is contained in:
Ton Roosendaal
2008-02-14 18:00:58 +00:00
parent 4b784f4311
commit 3c2adb1801
1 changed files with 20 additions and 3 deletions
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23
source/blender/render/intern/source/shadeoutput.c
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@@ -1513,11 +1513,28 @@ static void shade_lamp_loop_only_shadow(ShadeInput *shi, ShadeResult *shr)
}
}
/* let's map negative light as if it mirrors positive light, otherwise negative values disappear */
static void wrld_exposure_correct(float *diff)
{
diff[0]= R.wrld.linfac*(1.0f-exp( diff[0]*R.wrld.logfac) );
diff[1]= R.wrld.linfac*(1.0f-exp( diff[1]*R.wrld.logfac) );
diff[2]= R.wrld.linfac*(1.0f-exp( diff[2]*R.wrld.logfac) );
float f= diff[0];
if(f>0.0f)
diff[0]= R.wrld.linfac*(1.0f-exp( f*R.wrld.logfac) );
else
diff[0]= - R.wrld.linfac*(1.0f-exp( - f*R.wrld.logfac) );
f= diff[1];
if(f>0.0f)
diff[1]= R.wrld.linfac*(1.0f-exp( f*R.wrld.logfac) );
else
diff[1]= - R.wrld.linfac*(1.0f-exp( - f*R.wrld.logfac) );
f= diff[2];
if(f>0.0f)
diff[2]= R.wrld.linfac*(1.0f-exp( f*R.wrld.logfac) );
else
diff[2]= - R.wrld.linfac*(1.0f-exp( - f*R.wrld.logfac) );
}
void shade_lamp_loop(ShadeInput *shi, ShadeResult *shr)