基于OSG的电子沙盘系统的研究与实现

结合“山西省水利工程规划电子沙盘”实例提供了一种基于开源跨平台三维渲染引擎OSG的电子沙盘系统开发方案,并对其中场景结构的组织和管理、大地形建模和立体显示等关键技术展开了研究.分析了地形建模工具VPB的工作机理及生成IVE模型的分页细节层次结构,提出了一种模拟飞行的场景切换模式的实现方法.所开发出的系统具有海量模型库迅速加载、矢量文字图片显示、多种场景漫游方式并存等特点,对于工程实践有一定的指导意义.

Research and implementation of electronic sand table system based on OSG

A strategy to build electronic sand table system based on OpenSceneGraph which is a cross-platform open source scene graph API is proposed combined with a project example build on this strategy.Some key techniques of this strategy like organization and management of the scene,large terrain modeling and 3D stereo display are researched.The work process of terrain modeling software VirtualPlanetBuilder and the PagedLOD structure of created IVE model are analyzed,an implement method of "fly-to" scene switch mode is proposed.The realized system characterize by model database rapid loading,vector text and picture display and multiple scene ramble mode with the intention that benefits project development.