1cross_product(3) Allegro manual cross_product(3)
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6 cross_product, cross_product_f - Calculates the cross product. Allegro
7 game programming library.
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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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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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26 dot_product(3), polygon_z_normal(3), normalize_vector(3), exstars(3)
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30Allegro version 4.2.2 cross_product(3)