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DoomLevelMesh LightmapUVs are now finally correct

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RaveYard 2023-08-31 15:49:29 +02:00 committed by Christoph Oelckers
parent 2bce8b86c3
commit 73030b9315
1 changed files with 27 additions and 0 deletions
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27
src/rendering/hwrenderer/doom_levelmesh.cpp
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@ -499,6 +499,33 @@ int DoomLevelMesh::SetupLightmapUvs(int lightmapSize)
FinishSurface(lightmapSize, lightmapSize, packer, *surf);
}
// You have no idea how long this took me to figure out...
// Reorder vertices into renderer format
for (Surface& surface : Surfaces)
{
if (surface.type == ST_FLOOR)
{
// reverse vertices on floor
for (int j = surface.startUvIndex + surface.numVerts * 2 - 2, k = surface.startUvIndex; j > k; j-=2, k+=2)
{
std::swap(LightmapUvs[k], LightmapUvs[j]);
std::swap(LightmapUvs[k + 1], LightmapUvs[j + 1]);
}
}
else if (surface.type != ST_CEILING) // walls
{
// from 0 1 2 3
// to 0 2 1 3
std::swap(LightmapUvs[surface.startUvIndex + 2 * 1], LightmapUvs[surface.startUvIndex + 2 * 2]);
std::swap(LightmapUvs[surface.startUvIndex + 2 * 2], LightmapUvs[surface.startUvIndex + 2 * 3]);
std::swap(LightmapUvs[surface.startUvIndex + 2 * 1 + 1], LightmapUvs[surface.startUvIndex + 2 * 2 + 1]);
std::swap(LightmapUvs[surface.startUvIndex + 2 * 2 + 1], LightmapUvs[surface.startUvIndex + 2 * 3 + 1]);
}
}
return packer.getNumPages();
}