1cross_product(3)                Allegro manual                cross_product(3)
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NAME

6       cross_product,  cross_product_f - Calculates the cross product. Allegro
7       game programming library.
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SYNOPSIS

10       #include <allegro.h>
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13       void cross_product(fixed x1, y1, z1, x2, y2, z2, *xout, *yout, *zout);
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15       void cross_product_f(float x1,  y1,  z1,  x2,  y2,  z2,  *xout,  *yout,
16       *zout);
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DESCRIPTION

19       Calculates  the  cross product (x1, y1, z1) x (x2, y2, z2), storing the
20       result in (*xout, *yout, *zout). The cross product is perpendicular  to
21       both  of  the input vectors, so it can be used to generate polygon nor‐
22       mals.
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SEE ALSO

26       dot_product(3), polygon_z_normal(3), normalize_vector(3), exstars(3)
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30Allegro                          version 4.4.2                cross_product(3)