此程序利用二维曲线上等弧长编写程序，然后推广到曲面上布局分布点坐标，并求出这些点的法矢，最终把图形显示出来-This program uses a two-dimensional curve of the upper arc length of the preparation process, and then extended to the layout of the surface layout point coordinates, and the normal vector of these points, and finally the graphics displa