public void GlueFaces()
        {
            Quad front = Faces[(int)CubeFaces.Front];
            Quad back = Faces[(int)CubeFaces.Back];
            Top.updateVertices(back.UpperRight, back.UpperLeft, front.UpperLeft, front.UpperRight);
            Bottom.updateVertices(back.LowerRight, back.LowerLeft, front.LowerLeft, front.LowerRight);
            Left.updateVertices(front.UpperRight, back.UpperLeft, front.LowerRight, back.LowerLeft);
            Right.updateVertices(back.UpperRight, front.UpperLeft, back.LowerRight, front.LowerLeft);
        }