RotateAround in Unity

rotate_around.cs

    void Update () {
        //this.transform.RotateAround(this.transform.parent.position, this.transform.parent.up, 1);
 
        MyRotateAround(this.transform.parent.position, this.transform.parent.up, 1);
    }
 
    void MyRotateAround(Vector3 pos, Vector3 up, float degree)
    {
        Quaternion q = Quaternion.AngleAxis(degree, up);
        this.transform.position = q * (this.transform.position-pos) + pos;
        this.transform.rotation *= q;
    }