private struct ScreenQuad
        {
            public Vector2 TopLeft;
            public Vector2 TopRight;         
            public Vector2 BottomLeft;
            public Vector2 BottomRight;

            //Constructor for a ScreenQuad
            public ScreenQuad()
            {
                this.TopLeft = new Vector2(0);
                this.TopRight = new Vector2(1, 0);

                this.BottomLeft = new Vector2(0, 1);
                this.BottomRight = new Vector2(1, 1);
            }
        };