超量外存地表模型的实时绘制技术  

Real-Time Rendering for Out-of-Core Terrain Model

作　　者：吴金钟[1] 刘学慧[1] 吴恩华[1] 

机构地区：[1]中国科学院软件研究所计算机科学重点实验室

出　　处：《计算机辅助设计与图形学学报》2005年第10期2196-2202,共7页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金(60103011;60173022);国家重点基础研究发展规划项目(2002CB312102)

摘　　要：提出一种分块策略对规则网格进行区域分割,采用空间填充曲线对分块内网格点进行多分辨率排列,并基于分块多分辨率对地形网格实时调度和页面预取.文中算法利用块模型进行分块视域剔除和分块LOD场景渲染.在多线程分块多分辨率调度和渲染策略下,大大减少了模型的I/O负载,可以在有限环境下满足实时场景绘制要求.We propose an algorithm to partition the whole model into equal-size blocks and arrange the blocks with space filling curves in multi-resolution form. In real-time rendering, grid points are paged in block-by-block, layer-by-layer order according to the current viewpoint. Block-based view frustum clipping and multi-resolution LOD rendering are implemented at runtime. Under our block-based paging and rendering strategy, the I/O overload is greatly reduced and the algorithm satisfies real-time requirement under limited resources.

关 键 词：地形绘制 细节层次 超量模型 多分辨率 三角带 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]