海量地形三维仿真系统的设计与实现

The Design and Implemention of a Large Area Terrain 3D Simulation System

在CTS和Vegaprime软件的基础上,建立海量地形三维仿真系统。收集中国福建省的ETM数据和数字高程模型数据,预处理后利用CTS软件生成虚拟纹理和地形格网,并进行纹理映射。在VegaPrime下引用地形格网和虚拟纹理形成三维的海量大地形场景,并基于MFC环境下实现海量大地形三维仿真系统。通过采用虚拟纹理技术、层次细节模型、大地形数据的组织、地形纹理的映射技术、大地形碰撞检测技术、大地形调度技术,解决了在大区域尺度下海量地形数据漫游的难点。

Based on creator terrain studio（CTS） and Vega Prime,this paper manages to build up the massive terrain 3D simulation system.By preprocessing database of ETM and DEM in Fujian,virtual texture and topographic pattern are generated by CTS.After texture mapping,a 3D massive terrain scene is created by using of Vega Prime and finally massive terrain 3D simulation system is realized based on MFC.The application of virtual texture,level of detail model,organization of massive terrain database,terrain texture mapping,large terrain collision detection,and large terrain dispatching technology is helpful in solving large scale image and terrain roaming.