.\" Generated by the Allegro makedoc utility
.TH cross_product 3alleg4 "version 4.4.2" "Allegro" "Allegro manual"
.SH NAME
cross_product, cross_product_f \- Calculates the cross product. Allegro game programming library.\&
.SH SYNOPSIS
.B #include <allegro.h>

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

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

.SH SEE ALSO
.BR dot_product (3alleg4),
.BR polygon_z_normal (3alleg4),
.BR normalize_vector (3alleg4),
.BR exstars (3alleg4)