用动态链表实现求凸壳的程序（卷包裹法），供三角网实现编程的人参考-Using dynamic list for the Convex Hull of the realization of procedures (vol Parcel law) for the triangular network programming reference

vc编程读取dxf文件高程点数据，对离散点均匀化处理，并用delaunay逐点插入算法建网。-vc programming to read the dxf file elevation point data, the uniform treatment of discrete points, and delaunay incremental insertion algorithm of network construction.