1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/vmath/ray_c.c	Thu Sep 08 08:30:42 2011 +0300
     1.3 @@ -0,0 +1,18 @@
     1.4 +#include "ray.h"
     1.5 +#include "vector.h"
     1.6 +
     1.7 +ray_t ray_transform(ray_t r, mat4_t xform)
     1.8 +{
     1.9 +	mat4_t upper;
    1.10 +	vec3_t dir;
    1.11 +
    1.12 +	m4_copy(upper, xform);
    1.13 +	upper[0][3] = upper[1][3] = upper[2][3] = upper[3][0] = upper[3][1] = upper[3][2] = 0.0;
    1.14 +	upper[3][3] = 1.0;
    1.15 +
    1.16 +	dir = v3_sub(r.dir, r.origin);
    1.17 +	dir = v3_transform(dir, upper);
    1.18 +	r.origin = v3_transform(r.origin, xform);
    1.19 +	r.dir = v3_add(dir, r.origin);
    1.20 +	return r;
    1.21 +}