pub unsafe extern "C" fn graphene_triangle_init_from_point3d(
t: *mut graphene_triangle_t,
a: *const graphene_point3d_t,
b: *const graphene_point3d_t,
c: *const graphene_point3d_t
) -> *mut graphene_triangle_t
pub unsafe extern "C" fn graphene_triangle_init_from_point3d(
t: *mut graphene_triangle_t,
a: *const graphene_point3d_t,
b: *const graphene_point3d_t,
c: *const graphene_point3d_t
) -> *mut graphene_triangle_t