[1]叶健,陶和平,陈锦雄,等.面向山地灾害动态过程仿真的地形三维建模与可视化[J].山地学报,2012,(02):195.
　YE Jian,TAO Heping,CHEN Jinxiong,et al.3D Terrain Modelling and Visualization for Dynamical Process Simulation of Mountain Disasters[J].Mountain Research,2012,(02):195.
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面向山地灾害动态过程仿真的地形三维建模与可视化()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2012年02期
页码:
195
栏目:
山地学报
出版日期:
2012-01-01

文章信息/Info

Title:
3D Terrain Modelling and Visualization for Dynamical Process Simulation of Mountain Disasters
作者:
叶健;陶和平;陈锦雄;陈晓清;
中国科学院水利部成都山地灾害与环境研究所，四川 成都 610041
Author(s):
YE Jian;  TAO Heping;  CHEN Jinxiong;  CHEN Xiaoqing
Institution of Mountain Hazards and Environment, Chinese Academy of Science, Chengdu 610041,China
关键词:
LOD; 三维地形可视化; ROAM; 分层; 分块
Keywords:
level of detail;  3D terrain visualization;  Realtime Optimally Adapting Meshes;  multiresolution;  block
分类号:
TP391
文献标志码:
A
摘要:
基于山地灾害动态过程仿真需要的考虑,并针对该动态过程仿真时渲染数据量过大所造成的实时性较差的问题,提出了利用改进的三角形二叉树LOD算法实现地形三维建模与可视化的方法。算法对山地地形数据进行了分层和分块的预处理,用三角形二叉树表示地形网格,并结合视点和局部地形的粗糙程度,动态的载入所需的地形块和释放无用的地形块,使得内存中的地形数据维持在一定范围内。实验结果表明;在对地形渲染不失真的前提下,本方法能够有效地提高地形绘制的效率,可应用到大规模山地地形的三维建模与可视化中去,为整个山地灾害的动态过程仿真奠定了良好的基础。
Abstract:
In correspondence with the requirement of dynamical process simulation of mountain disasters and the drawbacks of rendering the whole process of mountain disasters dynamic simulation in real time, the improved LOD algorithm based on the triangle bintree data structure, is proposed, to realize 3D modelling and visualization of mountainous terrain. It performs pretreatment of blocking and layering for mountainous terrain data, and uses triangle bintree to represent terrain meshes. It also dynamically split or merge data blocks with quadtree structures according to viewpoints as well as the roughness in local terrain, which limit the terrain data in the memory. The experimental result shows that the method presented in this paper is feasible and efficient，has a low memory expenses, it can be used to realize real time rendering of very largescale terrain, which lays a good foundation for whole dynamical process simulation of mountain disasters.

备注/Memo

备注/Memo:
收稿日期(Received date)：2011-12-21；改回日期(Accepted)：2012-03-01。
基金项目（Foundation item）：中科院山地所青年百人团队计划项目（SDSQB-2010-03）。\[Supported by the Youth Talent Team Program of IMHE,CAS(SDSQB-2010-03).\]
作者简介（Biography）：叶健（1980-），男，安徽六安人，博士研究生，主要从事山地灾害三维仿真研究方面的工作。\[Ye Jian(1980-),male, born in Luan of Anhui, doctor student, mainly engaged in research of 3D simulation of mountain disasters.\]E-mail:alexye518@gmail.com *
通讯作者(Corresponding author):陈锦雄，男，教授，博士生导师。\[Chen Jinxiong, male, professor, doctoral supervisor.\] E-mail：jimxchen@gmail.com
更新日期/Last Update: 1900-01-01