【作者】 朱程程；

【导师】 刘建忠；

【作者基本信息】 解放军信息工程大学 ， 人文地理学， 2007， 硕士

【摘要】 本文简要分析了城市在未来战争的地位和城市战场环境的特点,简要地总结了三维城市战场环境的构成要素及主要建模对象,并以此为线索总结了城市战场空间数据的获取方法及数据的预处理方法。在此基础上,详细阐述了各主要建模对象的建模方法和理论。总结了目前常用的三维城市战场可视化技术,并对各可视化技术进行了详细的比较分析,选择Java3D作为本文城市战场三维可视化的开发环境,进而分类别讨论了在Java3D中如何实现各主要建模对象的可视化。本文分析了目前在大规模城市三维可视化普遍存在难点和需要解决的问题。并提出了自己的数据组织方法和大场景显示时的数据动态载入机制。在大范围场景数据的入库管理方面,本文提出一种交互式可视化的数据入库方法,一定程度上解决了传统三维建模软件不能应对大范围场景建模问题。在大范围城市场景数据的显示方面,本文提出了一种基于多分辨率模型数据的多级数据分页动态装载机制,一定程度上解决了传统可视化软件随着数据量增大渲染负担加重的问题。最后,在论文研究的基础上,设计了城市战场三维可视化的试验原形系统,并实现了二三维同步漫游、海量场景数据的可视化交互入库、大范围城市场景的显示、依二维地图定位、依数据库查询定位、作战方案的动画编辑与演示等功能。更多还原

【Abstract】 This article analyzed the role cities will play in future battle and the city battle filed environment, summarized the main modeling target in 3D city battle filed environment, and in accordance, summarized the way of obtaining and proceeding spatial data of city battle field. Based on the job said above, this article summarized the main methods and technologies of 3D modeling in common use. And discussed the common ways of 3D visualization, and made a clear comparison among the ways, then choose Java3D as the developing environment of 3D visualization in this article. And specified how the main 3D modeling targets are visualized in Java3D environment.This article summarized the main problems people meet in large-scale city data visualization, and put forward a newly way of data engagement and employment in the course of 3D displaying. To solve the problem of data engagement, this article put forward a interactive and viewable way of loading 3D data into the database. To solve the problem of large-scale city data displaying, this article put forward a way of multi-leveled LOD data based multi-leveled data flipping mechanism.This article also designed a test system for large-scale city data displaying, and realized functions such as the co-tracing of 3D scene and 2D maps, positioning be 2D map clicks, positioning by DBMS queries, the interactive visualizing way of mass data loading to the DBMS, the displaying of mass city data, city action editing and showing etc.更多还原