pub unsafe extern "C" fn graphene_plane_init(
p: *mut graphene_plane_t,
normal: *const graphene_vec3_t,
constant: c_float,
) -> *mut graphene_plane_t
pub unsafe extern "C" fn graphene_plane_init(
p: *mut graphene_plane_t,
normal: *const graphene_vec3_t,
constant: c_float,
) -> *mut graphene_plane_t