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light: bounce: area-weight the patches when averaging them to get the light to emit for a face

This commit is contained in:
Eric Wasylishen 2016-09-08 21:39:37 -06:00
parent ce812f5570
commit eaec325ab4
1 changed files with 7 additions and 3 deletions
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10
light/light.cc
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@ -871,14 +871,18 @@ MakeBounceLightsThread (void *arg)
DiceWinding(winding, 64.0f, SaveWindingFn, &args);
winding = nullptr; // DiceWinding frees winding
// average them
// average them, area weighted
vec3_t sum = {0,0,0};
float totalarea = 0;
if (patches.size()) {
for (const auto &patch : patches) {
VectorAdd(sum, patch->directlight, sum);
const float patcharea = WindingArea(patch->w);
totalarea += patcharea;
VectorMA(sum, patcharea, patch->directlight, sum);
// printf(" %f %f %f\n", patch->directlight[0], patch->directlight[1], patch->directlight[2]);
}
VectorScale(sum, 1.0/patches.size(), sum);
VectorScale(sum, 1.0/totalarea, sum);
}
vec3_t texturecolor;