基于图形硬件的海量地形可视化算法  

A Graphic Hardware-based Algorithm for Visualization of Massive Terrain Dataset

作　　者：殷小静[1] 慕晓冬[1] 陈琦[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《火力与指挥控制》2012年第11期61-64,共4页Fire Control & Command Control

基　　金：军内科研重点基金资助项目(EP103071)

摘　　要：利用基于图形硬件的地形可视化算法——Geometry Clipmap算法的基本思想,结合图形硬件的最新发展情况,充分利用CUDA的并行计算能力和VBO、PBO的数据缓存能力,改进了数据预处理方式、数据缓存机制以及视景体裁切算法,通过三角形条带方式进一步提高了绘制速度,实现了海量数据的实时可视化。实验表明,改进后的Geometry Clipmap算法提高了渲染效率,并节约了系统资源。The main idea of the Geometry Clipmap is used,which is a graphic hardware-barea terrn visualization algorithm. Following the lately advance of graphic hardware, the emphasis focuses on data management.data memory and view frustum culling, which profits from the parallel calculation capability of CUDA and the data memory capability of VBO and PBO. In the end,massive terrain are visualizated in the form of triangle strips. The experiments show that the improved Geometry Clipmap algorithm does not only increase the visualization efficiency but also economize the system resource.

关 键 词：海量地形 地形可视化 数据缓存 视景体剪切 Geometry Clipmap 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]