利用离散点数据，画点符，并进行不规则三角网的构建，耗时短，速度快，-use of discrete data, and the painting website points, and TIN of Construction, time-consuming short, fast and

通过用户交互的方式形成Delauny三角网，也可以通过读取点（txt）文件画tin并且输出三角网的每条边的起点，终点，线的斜率和截距-Using the way that users control the positions of the points so as to draw the TIN under the rule of Delauny.Besides,it allows the users that call the txt file which records the infor