Vec3 TransformNormal(Vec3 normal)
Transforms a point through the Matrix, but excluding translation! This is great for transforming vectors that are -directions- rather than points in space. Use this to transform normals and directions. The same as multiplying (x,y,z,0) with the Matrix.
|Vec3 normal||The direction to transform.|
|RETURNS: Vec3||The direction transformed by the Matrix.|
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