The conventional wisdom (in scientific computing) that you seldom need to compute an inverse of a matrix does not apply to computer graphics. 4x4 matrix inverse

The conventional wisdom (in scientific computing) that you seldom need to compute an inverse of a matrix does not apply to computer graphics. 4x4 matrix inverse is one of the most useful functions in computer graphics and is used a lot. It is most often used as a hand rolled 4x4 matrix inversion function, not a generic NxN matrix inversion.