man apply_matrix () - Multiplies a point by a transformation matrix. Allegro game programming library.
NAME
apply_matrix, apply_matrix_f - Multiplies a point by a transformation matrix. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
void apply_matrix(const MATRIX *m, fixed x, y, z, *xout, *yout, *zout);
void apply_matrix_f(const MATRIX_f *m, float x, y, z, *xout, *yout, *zout);
DESCRIPTION
Multiplies the point (x, y, z) by the transformation matrix m, storing the result in (*xout, *yout, *zout).