基于浅水海浪数值模型的近岸海浪仿真

针对航海模拟器中视景仿真的要求,对海浪进行实时仿真.在分析近岸水波模拟中几何合成法和物理方法的基础上,提出一种利用浅水海浪SWAN数值模型的近岸海浪仿真方法.该方法基于Gerstner海浪波形,通过对需要模拟水域进行水深数据采集,应用SWAN对网格化水深数据进行相应的计算,得到近岸海域的波高、相位以及频率数据.通过采样得到Gerstner波形所需参数进行合成.基于GPU实现了LOD海面的几何绘制和光学效果.实验表明,该方法在满足近岸水波数值特性的同时,绘制方法简单且速度快,能够满足航海模拟器近岸航行训练的需求.

Rendering of Near-shore Waves Based on Numerical Model for Shallow Water

To meet the requirements of training in coastal region for marine simulators,a method for rendering of near shore waves are presented.Firstly,the parameters of near shore waves are acquired by solving the SWAN numerical model for shallow water.The depth data of simulating region are imported as gridding input.The outputs of SWAN,such as significant height,phase and frequency,are provided for the modeling of Gerstner.Finally,the real-time rendering based on GPU is carried out,a LOD sea surface grid and optics effects are achieved.The experiments results show that this method can meet the numerical characteristics of shallow water,and have a good performance in rendering speed,which can meet the requirements for marine simulators.