飞行视景仿真中三维大地形的生成  

3D Huge Terrain Generation in Flight Scene Simulation

作　　者：姚本君[1] 赵欢[1] 李传良[2] 陈暮春[2] 

机构地区：[1]湖南大学计算机与通讯学院,长沙410082 [2]空军工程大学工程学院,西安710038

出　　处：《系统仿真学报》2009年第6期1633-1636,共4页Journal of System Simulation

摘　　要：如何既逼真的实现三维大地形的可视化,又消耗尽量少的系统硬件资源,是飞行视景仿真必须克服的问题。从飞行仿真中三维地形显示的特点出发,以我国东南部某地区的DEM(数字高程模型)数据块及其航拍照片作为原始数据,采用先生成测试地形,再实现全部大地形的方法,通过设置3个级别的LOD和采用地形转换、网格简化及地形分块技术,采用三维建模软件Creator生成了一块400×400km2的大地形,满足了飞行仿真的需求。How to generate both living 3D huge terrain and expend hardware resource as less as possible is a compulsory problem in flight scene simulation.At the base of analyzing display requirement of 3D terrain in flight simulation,taking DEM data block and airscape of some area in southeast of China for example,a block of 160000 sq km terrain was generated using 3D modeling software Creator.In the process of terrain realization,firstly test terrain was generated,and then the whole terrain was realized.The technology of setting three level LOD,terrain conversion,mesh predigestion and terrain division was adopted to satisfy the requirement of flight simulation.

关 键 词：三维大地形 LOD 地形转换 网格简化 地形分块 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]