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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 the requirements of naval air-sea virtual battlefield environment simulation platform, three simulation models, sky scene simulation model, surf scene simulation model and sea light illumination model, are constructed. Real-time simulation of the sky dynamic scene under different latitudes and longitudes, different weather conditions and different weather conditions is carried out by using the common sky standard brightness distribution model; and the brightness calculation, color space conversion, color correction and vertex color mapping are implemented; Extract the parameters of wave amplitude, frequency and propagation direction of unit wave, construct FFT computing mode to generate a large number of unit waves in real time, and then generate sea waves; establish a sea illumination model and apply GPU shading technology to reflect the dynamic sky changes in the surf scene and express the environment Between the dependence and follow-up. The simulation results show that the technical approach can simulate the air-sea one battlefield environment vividly and has strong practical value in engineering.