说明：  本程序基于Visual c++的MFC的对话框，采用OpenGL显示应力云图，在工程中经常采用，代码简洁，常用于应力仿真后处理，值得学习与珍藏。
(This program is based on the MFC dialog box of Visual C++, using OpenGL to display stress cloud maps. It is often used in engineering, with simple code, and is commonly used for stress simulation post-processing. It is worth learning and collecting.)