这段代码功能是显示VRML格式文件，采用Opengl显示列表，平滑分割3D三角形网格-This code function is shown VRML format used Opengl display list, Smoothing segmentation 3 D triangular mesh

基于区域增长法的模型切割 很适于初学者对opengl和三维模型的学习-Model-based region growing method is suitable for beginners cutting and three-dimensional model of the learning opengl