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| author | paramat <mat.gregory@virginmedia.com> | 2017-02-06 21:48:54 +0000 |
|---|---|---|
| committer | paramat <mat.gregory@virginmedia.com> | 2017-02-07 00:19:52 +0000 |
| commit | 8bc6a303b461662b7434a5ee8557292d43682cc9 (patch) | |
| tree | 0b1e32537fa4717e4ca5daab448d982b3bf7dbf6 /src/mesh.cpp | |
| parent | 5da3ed19a38ba5a342ba16c61be7bfb7c17b2308 (diff) | |
| download | minetest-8bc6a303b461662b7434a5ee8557292d43682cc9.tar.gz minetest-8bc6a303b461662b7434a5ee8557292d43682cc9.tar.bz2 minetest-8bc6a303b461662b7434a5ee8557292d43682cc9.zip | |
Face shading: Add shade factor comments
Diffstat (limited to 'src/mesh.cpp')
| -rw-r--r-- | src/mesh.cpp | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/mesh.cpp b/src/mesh.cpp index 6a055abb2..a79264ef0 100644 --- a/src/mesh.cpp +++ b/src/mesh.cpp @@ -42,8 +42,15 @@ inline static void applyShadeFactor(video::SColor& color, float factor) void applyFacesShading(video::SColor &color, const v3f &normal) { - // Many special drawtypes have normals set to 0,0,0 and this - // must result in maximum brightness (no face shadng). + /* + Some drawtypes have normals set to (0, 0, 0), this must result in + maximum brightness: shade factor 1.0. + Shade factors for aligned cube faces are: + +Y 1.000000 sqrt(1.0) + -Y 0.447213 sqrt(0.2) + +-X 0.670820 sqrt(0.45) + +-Z 0.836660 sqrt(0.7) + */ float x2 = normal.X * normal.X; float y2 = normal.Y * normal.Y; float z2 = normal.Z * normal.Z; |