一种基于OSG的海量地形快速渲染方法  

An Approach of Quick Rendering of Massive Terrain Dataset Based on OSG

作　　者：范亚兵 王明海 范亚洲[2] 刘勇 

机构地区：[1]61363部队 [2]长安大学地球科学与资源学院

出　　处：《测绘与空间地理信息》2014年第7期190-192,196,共4页Geomatics & Spatial Information Technology

摘　　要：针对海量地形数据实时渲染,本文采用开源跨平台三维渲染引擎OSG(Open Scene Graph)技术,设计了一种海量地形快速渲染方案。文中对场景结构的组织和管理、LOD调度等关键技术展开了研究,分析了生成IVE三维模型的分页LOD层次结构,提出了一种海量地形快速渲染的实现方法。试验结果实现了海量地形数据的实时加载、距离坡度测量、多种场景漫游方式以及水淹分析等功能,对工程实践有一定的指导意义。For the real - time rendering of massive terrain dataset, the open - source scene graph which is a cross platform is used in this paper, and a kind of scheme of quick rendering of massive terrain dataset is designed. Some key techniques of this strategy like organization and management of the scene, LOD loading are researched, and the paged LOD structure of created IVE model are analyzed, and an approach is proposed for the rendering of massive terrain dataset. The experimentation validates the realization tbr the function such as massive terrain database rapid loading, the measurement of distance and gradient, multiple scene ramble mode with the intention, and flood analysis, which offers benefits project practice development to some extent.

关 键 词：开源场景图形 海量地形 细节层次模型 视景仿真 

分 类 号：P231.5[天文地球—摄影测量与遥感]