Real-time Marine Simulation System

As an emerging comprehensive information technology, Virtual Reality integrates the latest achievements of several kinds of information technology and is applied to all walks of life. As we all know, China is a powerful country in ocean. Including the marine environment virtual reality technology, the marine technology plays a vital role in its national economy. In it, the modeling and rendering of the ocean scenes is the first to be done to enhance the trueness and interactivity of the ocean scene. All of the above include many specific technologies, such as the large-scale terrain rendering, the representation of ocean water and water scenes. In the process of the implementation of the technology, real-time should first be ensured, then at the same time optimize the function. The marine environment VR can be divided into two stages: modeling and rendering. The present work is also focused on designing better algorithms of the two stages to enhance the trueness and interactivity and reduce the calculation amount. At present, most innovative work is focused on the two stages, which also gets good effect, but there still exists many problems to be solved.This article firstly made analysis in the common techniques of real-time ocean simulation, and summarized several surface modeling techniques and sea mesh generation methods. Based on this, an implement method of ocean simulation by projection grid with Fast Fourier Transformation was given. Subsequently, this paper also gave the detailed process of the rendering of the ocean, the generation method of the coastline mesh. Then, we put forward the rendering method of the caustic rendering in the sea bottom and two god ray rendering method underwater. Finally, experimental results were displayed.