pub unsafe extern "C" fn graphene_ray_get_closest_point_to_point(
r: *const graphene_ray_t,
p: *const graphene_point3d_t,
res: *mut graphene_point3d_t,
)
pub unsafe extern "C" fn graphene_ray_get_closest_point_to_point(
r: *const graphene_ray_t,
p: *const graphene_point3d_t,
res: *mut graphene_point3d_t,
)