NAME

       apply_quat - Multiplies a point by a quaternion. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       void apply_quat(const QUAT *q, float x, y, z, *xout, *yout, *zout);

DESCRIPTION

       Multiplies  the  point (x, y, z) by the quaternion q, storing the result in (*xout, *yout,
       *zout). This is quite a bit slower than apply_matrix_f(), so only use it  to  translate  a
       few  points.  If  you have many points, it is much more efficient to call quat_to_matrix()
       and then use apply_matrix_f().