| 基于R树索引的三维场景细节层次自适应控制方法 |
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| 引用本文： | 龚俊,朱庆,章汉武,李晓明,周东波.基于R树索引的三维场景细节层次自适应控制方法[J].测绘学报,2011,40(4):531-534. |
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| 作者姓名： | 龚俊 朱庆 章汉武 李晓明 周东波 |
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| 作者单位： | 1. 江西师范大学地理与环境学院,江西南昌,330022
2. 武汉大学测绘遥感信息工程国家重点实验室,湖北武汉,430079 |
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| 基金项目： | 国家自然科学基金(41001222;40871212;40721001); 国家973计划(2010CB731801); 测绘遥感信息工程国家重点实验室开放研究基金((10)重04) |
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| 摘 要： | 针对大规模三维城市建模需要,介绍一种基于三维R树索引的多细节层次（简称LOD）管理方法,从叶节点层向根节点自动生成LOD场景,并设计实现LOD检索的算法。通过试验分析,证明本文的LOD定义参数能够定量控制三维场景中的渲染目标数目,进而实现三维场景的自适应可视化方法,尤其适合于建筑物和树木类型的地物目标。
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| 关 键 词： | 三维场景 R树 多细节层次 自适应 |
An Adaptive Control Method of LODs for 3D Scene Based on R-tree Index |
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| GONG Jun,ZHU Qing,ZHANG Hanwu,LI Xiaoming,ZHOU Dongbo.School of Geography , Environment,Jiangxi Normal University,Nanchang ,China,.State Key Laboratory of Information Engineering in Surveying,Mapping , Remote Sensing,Wuhan.An Adaptive Control Method of LODs for 3D Scene Based on R-tree Index[J].Acta Geodaetica et Cartographica Sinica,2011,40(4):531-534. |
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| Authors: | GONG Jun ZHU Qing ZHANG Hanwu LI Xiaoming ZHOU DongboSchool of Geography Environment Jiangxi Normal University Nanchang China State Key Laboratory of Information Engineering in Surveying Mapping Remote Sensing Wuhan |
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| Institution: | GONG Jun1,ZHU Qing2,ZHANG Hanwu1,LI Xiaoming2,ZHOU Dongbo21.School of Geography and Environment,Jiangxi Normal University,Nanchang 330022,China,2.State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan 430079 |
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| Abstract: | Aiming at the requirement of large-scale 3D city modelling,a method is puts forward to organize LOD scene based on R-tree's hierarchical structure.LOD scene can be automatically generated from leaf node layer to root node,and efficient algorithm of LOD search are also designed and implemented.By experimental analysis,it is proved that scene complexity can be quantitatively altered by adjusting one defined LOD parameter,and further adaptively control LOD of 3D scene,which suits building and tree type especia... |
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| Keywords: | 3D scene R-tree levels of detail adaptive |
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