立体旋转的圈,用数组将坐标点保存；根据三维坐标变换；将立体的坐标变换成不成角度的坐标值；再根据正等轴侧（其它轴测图）、或透视坐标变换将坐标值变换到屏幕上用直线将图形绘制出来。-three-dimensional rotating the ring, and the array will coordinate point preservation; Under the three-dimensional coordinate transformation; three-dimensional co