使用c++编写的关于网格方面的程序，包括网格的数据结构，输入输出，细分变形，补洞等程序-Prepared using c++ program on the grid area, including the grid data structure, input and output, subdivision deformation, fill holes and other procedures

在做地铁隧道的断面变形分析时，会用到中轴线的提取-When the subway tunnel section deformation analysis, will be used to extract the axis of