大规模三维地形仿真算法的研究  

Research on a Kind of Large-scale 3D Terrain Simulation Algorithm

作　　者：杜丽霞[1] 郝志斌[1] 

机构地区：[1]兰州交通大学电子与信息工程学院,甘肃兰州730070

出　　处：《兰州交通大学学报》2011年第3期112-115,128,共5页Journal of Lanzhou Jiaotong University

摘　　要：采用LOD算法,以视点相关及地形本身起伏程度相关技术来决定地形应有的细节程度.在每次渲染前,都基于视点相关以及地形本身起伏程度相关的节点评价系统动态地更新地形网格,递归地分割每一个节点,直到达到需要的细节程度.地形的起伏程度事先被计算出来以提高速度.在不同的细节等级上作区分主要是为了增加地形的真实感.在编程时所使用的工具为OpenGL,主要是运用其强大的图形库去验证了细节等级在大地行中运用的正确性.LOD algorithm can be used to determine the proper level of detail terrain. This algorithm adopts view-dependent and topographic undulations of its own related technology. Before each rendering, node evaluation system that is based on the view-dependent and topographic undulations of its own is used to update dynamically. Each node is split until it can reach the level of detail required. The undulations of the terrain will be calculated advancedly to improve the speed. Making distinction at different levels of detail is used to increase the realism. The tool used in programming is OpenGL. The powerful graphics verify the correctness.

关 键 词：三维地形 仿真 算法 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术]