一种视点相关的实时海洋渲染算法“研究生论坛”

针对模拟仿真系统对海洋模拟效果实时性和真实性的严格要求，提出一种视点相关的海洋渲染算法。在实时性上，使用快速傅里叶变换的频谱统计模型计算视点近处的海洋运动细节，使用Perlin噪声扰动的方式模拟视点远处的海洋运动，并对远近过渡区域进行alpha混合处理；在真实性上，构建视点相关的海洋网格并通过实时坐标转换使其能够适用于全球漫游，并结合实时光照和水底折射渲染海水颜色。文章提供了能够适用全球范围海洋真实模拟的新方法。实验表明该算法在展现逼真海洋视觉效果的同时，具有较高的渲染帧率。

View-dependent Real-time Rendering of Ocean

In order to meet strict requirements of real-time and reality of Simulation System, a rendering algorithm of ocean applied to the earth model is proposed. For real-time, ocean mesh grids are classified into near-view part and far-view part. Moving details of near-view part are computed by using FFT spectrum statistical model and far-view part is simulated by disturbance of Perlin noise, and the near-far transition region is rendered by Alpha Blending; For reality, view-dependent ocean mesh grids are built and can be applied to global navigation by real-time coordinate transformation and color of ocean water is rendered by considering both of real-time illumination and underwater refraction. The experimental results show that the proposed algorithm can be applied to efficient rendering of global ocean, which meets the requirements of real-time and reality.