基于Geometry Clipmap的大规模地形绘制算法  

A Large Scale Terrain Rendering Algorithm Based on Geometry Climap

作　　者：王朋[1] 刘惠义[1] 杨战军[2] 

机构地区：[1]河海大学计算机与信息学院 [2]92955部队

出　　处：《计算机与数字工程》2015年第5期887-891,共5页Computer & Digital Engineering

摘　　要：针对地形渲染的实时性与大规模地形数据的海量性之间的矛盾,基于Geometry Clipmap算法的基本思想,对其进行了简化和改进。在原始地形数据处理阶段,精简了原算法的数据结构,并按Clipmap格式进行存储;在绘制阶段,针对相邻层次间的裂缝问题,提出了一种删除边的方法有效地消除了裂缝。实验表明,该方法充分利用了GPU的优势,为大规模地形的实时绘制提供了解决方案。There has been a contradiction between the real-time terrain rendering and the massive data of a large scale terrain. Based on the basic idea of the Geometry Clipmap algorithm, this paper simplified and improved the original algo- rithm. When processing the raw terrain data, the method simplified the original algorithm＇s data structure and stored it into Clipmap structure. When rendering the terrain, a method that deletes some edges to effectively eliminate the cracks between adjacent levels is proposed. The experiments show that the method takes full advantage of the GPU and provides a solution to large scale terrain rendering.

关 键 词：地形 GEOMETRY clipmap 裂缝消除 GPU 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]