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(3alleg4),        polygon_z_normal(3alleg4),         normalize_vector(3alleg4),
       exstars(3alleg4)