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Diffstat (limited to 'Source/Core/VideoBackends/Software/TransformUnit.cpp')
| -rw-r--r-- | Source/Core/VideoBackends/Software/TransformUnit.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Source/Core/VideoBackends/Software/TransformUnit.cpp b/Source/Core/VideoBackends/Software/TransformUnit.cpp index e1e6fd68a6..6fcf42df9e 100644 --- a/Source/Core/VideoBackends/Software/TransformUnit.cpp +++ b/Source/Core/VideoBackends/Software/TransformUnit.cpp @@ -97,6 +97,11 @@ void TransformNormal(const InputVertexData* src, OutputVertexData* dst) MultiplyVec3Mat33(src->normal[0], mat, dst->normal[0]); MultiplyVec3Mat33(src->normal[1], mat, dst->normal[1]); MultiplyVec3Mat33(src->normal[2], mat, dst->normal[2]); + // The scale of the transform matrix is used to control the size of the emboss map effect, by + // changing the scale of the transformed binormals (which only get used by emboss map texgens). + // By normalising the first transformed normal (which is used by lighting calculations and needs + // to be unit length), the same transform matrix can do double duty, scaling for emboss mapping, + // and not scaling for lighting. dst->normal[0].Normalize(); } |