空海一体虚拟战场环境构建技术  

Building Technology on Virtual Synthetic Air-sea Battlefield Environment

作　　者：侯学隆[1] 张海峰[1] 罗木生[1] 

机构地区：[1]海军航空工程学院指挥系,山东烟台264001

出　　处：《兵工自动化》2015年第7期37-43,共7页Ordnance Industry Automation

基　　金：总装军用仿真技术十二五预研资助项目(51304030205);海军武器装备军内科研项目(2012-475)

摘　　要：针对海军空海一体虚拟战场环境仿真平台演练需求,构建了3种仿真计算模型,即天空场景仿真模型、海浪场景仿真模型和海面光照模型。利用通用天空标准亮度分布模型,进行亮度计算、颜色空间转换、颜色校正和顶点颜色映射,实现不同经纬度地域、不同时间、不同天气状况下天空动态场景的实时仿真;通过对方向谱进行离散采样,提取单元波振幅、频率、传播方向等参数,构造FFT计算模式快速合成大量单元波实时生成海浪;建立海面光照模型,应用GPU着色技术,将动态天空的变化在海浪场景中得以体现,表达了环境之间的依存性与随动性。仿真效果表明:该技术途径可逼真模拟空海一体战场环境,在工程上具有较强的实用价值。According to counter simulation exercise requirements for naval multiple weapon platforms, sky scene simulation model, ocean wave simulation model and ocean surface optical model were built. First, a method for simulating dynamic real-time sky background image varied with different region, different time and different weather conditions was discussed. After sphere sky geometry model was built, any arbitrary sky element luminance could be computed based on CIE general sky standard luminance. Then, the sky background dynamic image could be generated by means of scaling luminance, converting color space, adjusting color gamma factor and mapping each vertex in sphere sky. Second, ocean waves could be simulated effectively by means of getting amplitude, frequency and direction of component wave based on ocean wave spectrum sampling. FFT algorithm was used in summing many component waves. Finally, dynamic sky scene could be shown well in ocean wave scene by constructing ocean surface optical model and using GPU painting technology. The result of simulation shows that the approach could simulate realistic synthetic air-sea battlefield environment, and possess very strong practical value in engineering.

关 键 词：天空图像 海浪仿真 虚拟环境 视景仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]