pub unsafe extern "C" fn graphene_frustum_init_from_frustum(
f: *mut graphene_frustum_t,
src: *const graphene_frustum_t,
) -> *mut graphene_frustum_t
pub unsafe extern "C" fn graphene_frustum_init_from_frustum(
f: *mut graphene_frustum_t,
src: *const graphene_frustum_t,
) -> *mut graphene_frustum_t