protected override void OnBeginRenderLightmap(
StaticLightingCalculationWorld.MeshObject meshObject, LightmapImage renderingImage)
{
lightmapMeshObject = meshObject;
lightmapRenderingImage = renderingImage;
lightmapBucketIndex = Vec2I.Zero;
Vec2I textureSize = lightmapRenderingImage.Size;
//generate lightmapTriangleMap
{
lightmapTriangleMap = new int[textureSize.Y][];
for (int y = 0; y < textureSize.Y; y++)
{
lightmapTriangleMap[y] = new int[textureSize.X];
for (int x = 0; x < textureSize.X; x++)
{
lightmapTriangleMap[y][x] = -1;
}
}
Mesh mesh = meshObject.Mesh;
int triangleCount = mesh.Indices.Length / 3;
for (int triangleIndex = 0; triangleIndex < triangleCount; triangleIndex++)
{
int index0 = mesh.Indices[triangleIndex * 3 + 0];
int index1 = mesh.Indices[triangleIndex * 3 + 1];
int index2 = mesh.Indices[triangleIndex * 3 + 2];
Vec3 position0 = mesh.Positions[index0];
Vec3 position1 = mesh.Positions[index1];
Vec3 position2 = mesh.Positions[index2];
if (MathUtils.IsDegenerateTriangle(position0, position1, position2))
{
continue;
}
Vec2 texCoord0 = mesh.LightmapTexCoords[index0];
Vec2 texCoord1 = mesh.LightmapTexCoords[index1];
Vec2 texCoord2 = mesh.LightmapTexCoords[index2];
Vec2I pixelIndex0 = GetPixelIndexByTexCoord(texCoord0);
Vec2I pixelIndex1 = GetPixelIndexByTexCoord(texCoord1);
Vec2I pixelIndex2 = GetPixelIndexByTexCoord(texCoord2);
Geometry2D.FillTriangle(pixelIndex0, pixelIndex1, pixelIndex2,
new RectI(Vec2I.Zero, textureSize), delegate(Vec2I point)
{
lightmapTriangleMap[point.Y][point.X] = triangleIndex;
});
}
}
}