大规模城市场景的高效建模及其实时绘制  

Efficient Modeling and Real-Time Rendering of Large-scale Urban Scenes

作　　者：刘波[1] 王章野[1] 王丽英[1] 华炜[1] 彭群生[1] 

机构地区：[1]浙江大学CAD&CG国家重点实验室,杭州310058

出　　处：《计算机辅助设计与图形学学报》2008年第9期1153-1162,共10页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家"九七三"重点基础研究发展规划项目(2002CB312101);国家"八六三"高技术研究发展规划计划(2007AA01Z316);浙江省自然科学基金杰出青年团队项目(R407042)

摘　　要：提出一种新的大规模城市场景高效建模及实时绘制方法.该方法综合建筑物的航拍图及地面图片来分层构造单体建筑物的几何模型与纹理,构建出该城市的建筑模型库;并通过城市的小区规划图生成小区模板库,可高效地实现大规模城市的风格式建模.采用单体建筑物的简化建模方法,将分页式的场景剔除技术引入城市场景的图形绘制流水线中,可实现雨、雪等不同气象条件下大规模复杂城市场景的实时绘制,整个场景的平均绘制速度达到20帧/s.This paper proposes a new efficient modeling and real-time rendering approach for scale urban scenes. Our approach hierarchically recovers the geometry and texture of building large- units from their aerial and ground-level images, to construct an urban architectural model library. Besides, it sets up a library of layout templates to support the stylized design of each district in the urban scenes efficiently. By incorporating model simplification and paging scene culling techniques into the rendering pipeline, we successfully achieve the real-time rendering of large-scale complex urban scene under rain, snow and other weather conditions. The average rendering rate of the whole scene reaches up to 20 fps.

关 键 词：城市场景 高效建模 实时绘制 气象条件 建筑模型模板库 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]