多边形填充绘制并用渐变颜色填充, 按下键盘 1 ,多边形回到用给定点画模式进行填充按下键盘 2 ,多边形用给定点画模式进行填充,按下“S”键，多边形变大（镜头变小），按下“s”键，多边形变小（镜头变大）-Drawing filled polygons with gradient color filling, pressing the keyboard 1, the polygon with a given point to return to painting models filled by