基于BTF的草地实时绘制与ROAM实现  

Real-time Rendering and ROAM Realization of Grassland based on BTF

作　　者：郝海蓉[1] 申永军[1] 张晓炜[1] 张恒国[2] 

机构地区：[1]兰州大学信息科学与工程学院 [2]中国人民解放军95861部队

出　　处：《微计算机信息》2009年第24期243-245,共3页Control & Automation

摘　　要：在计算机图形学领域,传统的草建模研究多基于几何学,这种方式对于大规模草地而言,要产生大量数据,场景绘制时计算复杂度较高。针对此问题,采用一种基于GPU的双向纹理函数BTF方法,压缩处理采样数据,GPU完成双向纹理重构与映射,在场景质量和速度上得到了较好效果,在实现上采用ROAM算法,实现多分辨率渲染,对距离视点较远或粗糙的地方采取粗略绘制,进一步提高了渲染速度。In the field of computer graphics, the conventional methods of grass model are mainly based on geometry. The computation of this method is very complicated because of the mass data of grassland. A BTF method based GPU is proposed, which compressed the data in video memory and restructured when the grass is rendering. As a result of the model, the computational complexity of system is reduced greatly and real-time rendering is realized. Roam arithmetic is used in realization, which further the velocity of rendering.

关 键 词：双向纹理函数 图形处理器 奇异值分解 实时优化自适应地形网格 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]