Survey on scene simulation of the inviscid ocean wave

The scene simulation of ocean waves is a hot topic in computer graphics. Based on whether the liquid viscosity is considered, the simulation can be separated into two types, the scene simulation of viscid ocean waves and of the inviscid. For the scene simulation of viscid ocean waves, its theoretical principle is the governing equations of the viscid liquid, and it fits rendering middle and small scale size wave. When it is used for large scale rendering, the real-time ability is not good. In the scene simulation of inviscid ocean waves, the vicinity of liquid is ignored, but the simulation fits for large scale ocean waves and is real-time. The scene simulation of inviscid waves contains two methods: the method based on the regular wave and that based on the irregular. Both methods use the ocean wave spectrum. So the rendering results can reflect the wind influence on the wave. Both methods can be applied in the maritime simulator. An improvement is done by introducing a new instantaneous spatial spectrum with the JONSWAP spectrum as its frequency spectrum and the Poisson distribution as its directional distribution function. This improvement makes the generated waves show the fetch length influence. Additionally, two possible improvements for the irregular wave method are raised. One is to optimize the sampling of wave number vector to reduce the calculation amount, and the other one is to try the shallow water spectrum so that the rendered wave may reflect the water depth influence.