说明：  此程序是在学习vb参加省级级赛时，在老师的指导下所编写的不规则三角网的程序，可用于计算不规则三角网的土方量。也能够在vb.net中运行功能主要包括读书TXT文件，识别离散点数据，文件内包含数据文件，还能够在窗口显示数据文件，以及保存计算的输出结果。窗口有四个控件按钮，可以分别实现读取数据，绘制TIN图形及显示，显示边点及端点信息而且都能够保存等等。内附完整程序源代码，注释清晰，方便学习，几乎每行都有代码解释，定义简洁，只要有点编程基础的都能都学习掌握。
(This program is a program of irregular triangulation network written under the guidance of teachers when learning vb to participate in the provincial competition, which can be used to calculate the earthwork of irregular triangulation network. The functions that can also be run in vb.net mainly include reading TXT files, identifying discrete point data, containing data files in the file, displaying data files in the window, and saving the output of the calculation. The window has four control buttons, which can respectively read data, draw TIN graphics and display, display edge points and endpoint information and can be saved, and so on. Contains complete program source code, clear comments, easy to learn, almost every line has code interpretation, the definition is simple, as long as there is a bit of programming foundation can learn to master.)