说明：  二维随机平面的生成程序，用来模仿二维海平面，平面的大小，分辨力，都可以设置，最后产生三维图和等高图。
(The two-dimensional random plane generating program is used to simulate the two-dimensional sea level. The size and resolution of the plane can be set. Finally, three-dimensional and contour maps are generated.)