int mav_linePolygonIntersection(MAV_polygon *p, MAV_line ln, MAV_objectIntersection *oi);
int mav_lineInfPlaneIntersection(MAV_vector pt, MAV_vector norm, MAV_line ln, MAV_objectIntersection *oi);
int mav_lineAxisPlaneIntersection(float xmin, float xmax, float ymin, float ymax, float zmin, float zmax, MAV_vector pt, MAV_vector norm, MAV_line ln, MAV_objectIntersection *oi);
= item mav_lineInfPlaneIntersection tests for intersection between the line ln and the plane defined by the point pt and the normal vector norm.