Itersects a ray with a brush
Returns the face hit and the distance along the ray the intersection occured at
Returns NULL and 0 if not hit at all
-
-http://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=556
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*/
extern bool Patch_Ray(patchMesh_t *patch, vec3_t origin, vec3_t dir, double *t, double *u, double *v);