本程序由QT+OpenGL开发而成，能以点，线，面，平滑表面等方式显示模型，支持自由旋转，缩放，拖动，能检查模型是否完整，并自动补全模型，能读取ascii编码的obj模型和CAD模型-This procedure by QT+ OpenGL developed to a point, line and plane, smooth surface, such as display models, support for free rota