Gives the homogeneous matrix of a transformation function.
TransformationMatrix[tfun]
TransformationMatrix[RotationTransform[Pi/2]]
→ {{0, -1, 0}, {1, 0, 0}, {0, 0, 1}}TransformationMatrix[TranslationTransform[{1, 2}]]
→ {{1, 0, 1}, {0, 1, 2}, {0, 0, 1}}