Chunklod地形的过程化细节度增强算法  

Procedual Level of Detail Enhancement Algorithm of ChunkLod Real Time Terrain Rendering

作　　者：申闫春[1] 朱幼虹[1] 温转萍[1] 曹莉[1] 

机构地区：[1]北京信息科技大学虚拟现实与系统仿真实验室,北京100085

出　　处：《系统仿真学报》2008年第21期5763-5766,5773,共5页Journal of System Simulation

基　　金：科技部科技型中小企业技术创新基金项目(bt2006-50)

摘　　要：在研究了ChunkLod算法的基础上,针对该技术所缺乏当视点离地面非常近时的增强方案这一问题,以块状的模型为处理单位,提出了ChunkLod的过程化细节度增强算法。同时结合局部三角面化简算法和误差评估与控制算法提高绘制效率,避免了因细节度过高引起的海量计算。最后,以地理资源信息管理系统为例,说明了该算法在实际运行中使地形信息达到了预期的视觉效果。实验表明,改进后的ChunkLod过程化细节度增强算法将成为一种具备全部主流细节度技术的实用地形算法。The ChunkLod algorithm was researched Because the technology lacked process that viewpoint is near to the ground, the algorithm was adopted taking massive model as processing unit and the procedural enhancement of LOD was proposed And the algorithm increased the efficiency of rendering by combining the local triangle surface simplified algorithm and the error evaluation ＆ control algorithm, and it avoided large-scale computing caused by over-LOD. Finally, it shows that the visual effect of terrain information is expressed well when the algorithm is working virtually-the geography resources information management system, for example. The experiment indicates that the improved level of detail enhancement of ChunkLod is a practical terrain algorithm with total levels of detail technology.

关 键 词：ChunkLod 细节度增强算法 实时地形绘制 层次细节模型 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]