Function graphene_triangle_init_from_point3d

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