OpenGL是美国SGI公司最新推出的一套开放式的三维图形软件接口，适用于广泛的计算机环境，从个人计算机到工作站，OpenGL都能实现高性能的三维图形功能。OpenGL本身不仅提供对简单图元的操作和控制，还提供了许多函数用于复杂物体的建模。但是，我们通常喜欢使用AutoCAD和3DS及3Dmax等工具来建立模型，并且我们已经有了很多这样的模型，那么我们如何才能资源共享，避免重复劳动呢？利用CAD图形标准数据交换格式—DXF格式，我们就能很容易地实现资源共享，而不需要重复建模。 -SGI OpenGL is the company's new open-3D graphics software interface, applied to a wide range of computing environments, from the personal computer workstations, can achieve high-performance OpenGL 3D graphics capabilities. OpenGL itself not only provide simple graph yuan to the operation and control, but also provides many functions for complex object modeling. However, we usually prefer to use AutoCAD and 3DS max and tools to build models, and we have many such models, then how can we share resources and avoid duplication of work? CAD graphics standard data exchange format - DXF format, we can easily share resources, without the need to repeat modeling.