引江济太虚拟景观系统关键技术的研究与实现

Crucial techniques for implementation of scene visualization for water diversion from Yangtze River to Taihu Lake

介绍了系统场景可视化采用的一些关键技术.开发了引江济太三维虚拟景观原型系统(YJJT3D系统),用OpenGL作为底层图形驱动程序,以VC++6.0为开发工具,利用虚拟现实技术、多媒体技术和三维图形技术,实现了对大规模地形场景的实时动态显示、信息查询以及空间分析,并提出解决超大数据量数字高程模型快速显示的算法,将地物在地形中进行显示.该系统能在PC机上流畅地运行,图形的生成速度和质量较高.

An introduction was given to some crucial techniques for scene visualization. With OpenGL taken as driving program for bottom graph treatment and VC ＋ ＋ 6.0 taken as development tool, a 3-D scene visualization system for water diversion from Yangtze River to Taihu Lake （YJJT3D） was developed by use of visual reality technique, multimedia technique, and 3-D graphic technique; thus the real-time dynamic display, information inquiry, and spatial analysis of largo-scale terrain were realized. Moreover, the algorithm for fast display of DEM with a great deal of data was proposed, so that the geographic characteristics can be displayed in terrain. The system can be applied in PC with high speed and quality for graphic generation.