if (points.length === 0) {
                const pointF: PointF2D = new PointF2D((endLowerLeft.x - startLowerRight.x) / 2 + startLowerRight.x,
                                                      (endLowerLeft.y - startLowerRight.y) / 2 + startLowerRight.y);
                points.push(pointF);
            }