兵工自动化
兵工自動化
병공자동화
ORDNANCE INDUSTRY AUTOMATION
2015年
7期
37-43
,共7页
天空图像%海浪仿真%虚拟环境%视景仿真
天空圖像%海浪倣真%虛擬環境%視景倣真
천공도상%해랑방진%허의배경%시경방진
sky image%ocean wave simulation%virtual environment%scene simulation
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.
針對海軍空海一體虛擬戰場環境倣真平檯縯練需求,構建瞭 3 種倣真計算模型,即天空場景倣真模型、海浪場景倣真模型和海麵光照模型.利用通用天空標準亮度分佈模型,進行亮度計算、顏色空間轉換、顏色校正和頂點顏色映射,實現不同經緯度地域、不同時間、不同天氣狀況下天空動態場景的實時倣真;通過對方嚮譜進行離散採樣,提取單元波振幅、頻率、傳播方嚮等參數,構造FFT計算模式快速閤成大量單元波實時生成海浪;建立海麵光照模型,應用GPU著色技術,將動態天空的變化在海浪場景中得以體現,錶達瞭環境之間的依存性與隨動性.倣真效果錶明:該技術途徑可逼真模擬空海一體戰場環境,在工程上具有較彊的實用價值.
침대해군공해일체허의전장배경방진평태연련수구,구건료 3 충방진계산모형,즉천공장경방진모형、해랑장경방진모형화해면광조모형.이용통용천공표준량도분포모형,진행량도계산、안색공간전환、안색교정화정점안색영사,실현불동경위도지역、불동시간、불동천기상황하천공동태장경적실시방진;통과대방향보진행리산채양,제취단원파진폭、빈솔、전파방향등삼수,구조FFT계산모식쾌속합성대량단원파실시생성해랑;건립해면광조모형,응용GPU착색기술,장동태천공적변화재해랑장경중득이체현,표체료배경지간적의존성여수동성.방진효과표명:해기술도경가핍진모의공해일체전장배경,재공정상구유교강적실용개치.
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.