//public bool InCamera(Camera camera) {
        //	return(false);
        //}

        static public Polygon2D CreateFromCamera(Camera camera)
        {
            float     sizeY   = Camera.main.orthographicSize;
            Polygon2D polygon = Polygon2D.CreateFromRect(new Vector2(sizeY * (((float)Screen.width) / Screen.height), sizeY));

            return(polygon);
        }