Wolfram: Transformation Matrix
Matrix for Geometric Transformation
sometimes, you just need the matrix for a transformation.
these functions are good for if you want a matrix directly, e.g. if you are doing physics or linear algebra numerically.
once you get a matrix M, you can apply it to a point by just
M . p
3d rotation related:
matrix for nD:
TransformationMatrix
converts a symbolic
TransformationFunction
to a matrix.