cross_product(3)                Allegro manual                cross_product(3)



NAME
       cross_product, cross_product_f - Calculates the cross product. Allegro
       game programming library.

SYNOPSIS
       #include <allegro.h>


       void cross_product(fixed x1, y1, z1, x2, y2, z2, *xout, *yout, *zout);

       void cross_product_f(float x1, y1, z1, x2, y2, z2, *xout, *yout,
       *zout);

DESCRIPTION
       Calculates the cross product (x1, y1, z1) x (x2, y2, z2), storing the
       result in (*xout, *yout, *zout). The cross product is perpendicular to
       both of the input vectors, so it can be used to generate polygon
       normals.


SEE ALSO
       dot_product(3), polygon_z_normal(3), normalize_vector(3), exstars(3)



Allegro                          version 4.2.3                cross_product(3)
