摘要
虚拟城市是 3维城市地理信息系统的前沿领域 ,该文对在微机上如何建立虚拟城市作了初步探讨 ,把建立虚拟城市的方法分为 3维真实场景建模、海量数据环境下的场景漫游以及确定任意时刻声音文件的调入时机三个部分。重点介绍了控制三维场景漫游、自适应层次细节模型、简单碰撞检测的实现方法 ,并提出了采用泰森模型调用声音文件的新思路。最后给出在VC 开发环境下用OpenGL建立虚拟城市的应用实例。
Virtual-Reality City (VR City) is one of the most important technologies in 3D UGIS (Urban GIS). This paper makes a pilot study on the method of how to establish VR city on common PCs and divide this method into three sections: 3D real scene modeling, roaming in magnanimity data environment and determining the fold time of sound files at different places. Then, this paper introduces the methods of roam-controlling in 3D scenes, ROAM algorithm, simple collision detection in detail and it also brings out a new thought that using voronoi model to fold the sound files. At last, it gives the application example of establishing VR city with OpenGL in VC++6.0 development environment.
出处
《地理学与国土研究》
CSSCI
CSCD
北大核心
2002年第3期27-29,33,共4页
Geography and Territorial Research
基金
国家自然科学基金 (4 0 0 710 65 )
重点基础研究发展规划项目 (G2 0 0 0 0 7790 0 )
