Research And Implementation Of Virtual Walkthrough System Based On OpenGL

The basic conception and key technology of virtual reality technology are introduced in this paper. Research status in domestic and overseas is also discussed. Then we make some analysis about OpenGL programming and working theory, summarize the application framework, make some analysis about data feature of virtual building and how to import external 3D model file, which is formatted with 3DS, and use display tabular technology to accomplish three-D models establishment. After building up the basic models, we do some research on color model, light model and texture mapping in the process of generating realistic 3D graphics, such a series of technical issues, and their realization in OpenGL. On simulation of nature in scenes, we discuss simulation of fountain using particulate system and drawing of true sky. We adopt the algorithm of octree based on analyzing some algorithms of scene space subdivision. Last we use scene walkthrough control for interaction.The author using VC++ and OpenGL develops a preliminary three-D campus navigating system. Additionally, in three-D scene, some function of interactive operation and simulation of natural scene have been realized. At last, the author makes a conclusion of the whole thesis and points out the shortages in the system. Some potential research tonics in the future are put forward too.