程序采用的算法是，最短距离法，源程序由三个文件组成。

CoordinateTransformation.py模块

主要负责将轮廓线进行处理，从而使他们在一个平面的单位正方形内。

PointPair.py模块

主在负责将接收经过CoordinateTransformation处理后两层轮廓线数据，对他们使用最短距离法从而将每个三角片的三个顶点确定下来，并返回其索引值

Main.py

主要负责调opengl以及组织和显示。

-Program uses the algorithm, the shortest distance method, source code consists of three files. CoordinateTransformation.py module is mainly responsible for processing the contour lines so that they are in a plane within the unit square. PointPair.py module is in charge of the Lord will receive treatment through CoordinateTransformation two contour data, the shortest distance method they use to be the three vertices of each triangle determined, and returns the index value is responsible for adjusting opengl Main.py and the organization and display.