get_align_matrix - Rotates a matrix to align it along specified coordinate
vectors. Allegro game programming library.
void get_align_matrix(MATRIX *m, fixed xfront, yfront,
zfront, fixed xup, fixed yup, fixed zup);
Rotates a matrix so that it is aligned along the specified coordinate vectors
(they need not be normalized or perpendicular, but the up and front must not
be equal). A front vector of 0,0,-1 and up vector of 0,1,0 will return the