public static bool  obj_equal(long L, long R)
    {
        MeshRenderer left  = FCGetObj.GetObj <MeshRenderer>(L);
        MeshRenderer right = FCGetObj.GetObj <MeshRenderer>(R);

        if (left != null)
        {
            return(left.Equals(right));
        }
        if (right != null)
        {
            return(right.Equals(left));
        }
        return(true);
    }