基于VegaPrime的大型流域三维管理系统实现

Implementation of Large Area Valley Simulation System Based on VegaPrime

随着数字流域概念及虚拟现实技术的发展,三维仿真系统作为一种全新角度的管理方法和技术手段,在流域的现代化管理中越来越体现出其重要性。讨论了基于Creator/CTS/VegaPrime平台的大型流域三维可视化管理系统的实现方法,通过采用荆江流域30米分辨率DEM数据、15米分辨率ETM+遥感影像和1米分辨率航片数据进行流域大面积精确三维地形建模,开发了一个基于MFC的荆江流域三维仿真管理系统,并通过加入水利设施模型数据及属性数据,实现属性信息的查询和分析功能,使系统具备了基本的流域三维可视化管理功能。在技术层面,该文通过VirtualTexture、多级LOD以及分块地形动态载入管理技术的应用,解决了在大型流域仿真中大面积高精度纹理的处理及实时漫游的难点。

With the development of ＂Digital Valley＂ and ＂Virtual Reality＂, valley simulation system can be extensively used in integrated management of river as an innovative approach and technology. The implementation method of large area valley simulation system based on Creator/CTS/VegaPrime was explored. Jingjiang valley simulation system was developed based on MFC in VC＋＋ platform through DEM data of 30 meter grid spacing and ETM＋ images of 15M spatial resolution and 1M areal photograph. Hydraulic model management and attribute information query functions were realized in the system. The technology details of virtual texture, multi level of detail, tiled terrain dynamically paging management were expounded, which solved the problems of high spatial resolution texture and large area terrain real roaming in valley simulation management system.