一种基于图形硬件的海量地形实时可视化算法  

Graphic Hardware-based Algorithm for Real-Time Visualization of Massive Terrain Dataset

作　　者：康宁[1] 徐青[1] 周杨[1] 蓝朝桢[1] 

机构地区：[1]信息工程大学测绘学院

出　　处：《系统仿真学报》2007年第17期3988-3992,共5页Journal of System Simulation

基　　金：国家863-703资助项目(2005AA733050)

摘　　要：利用基于图形硬件的地形可视化算法—Geometrical Clipmap算法的基本思想,简化了算法的实现细节,讨论了算法的纹理映射处理方法,同时使用了一种更为快速高效的视锥体裁切方法和裂缝消除技术,进一步提高了绘制速度。并利用该算法结合金字塔多分辨率层次模型以及多线程动态调用机制,实现了海量数据的实时可视化。The main idea of the Geometrical Clipmap was used, which was a graphic hardware-based terrain visualization algorithm, The emphasis focused on simplification of the details and discussed the methods of texture mapping. It promoted the rendering effects by a new high performance frustum culling method and crack filling technique. The experiment results show this approach can reach fine performance for real-time rendering of massive terrain dataset combining with the tile-pyramid model and multi-thread,

关 键 词：地形可视化 LOD 多分辨率 瓦片金字塔 多线程 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]