Rendering ocean water of restricted region with twice clip method

The ocean animation is an important part of the visual simulation system. Using the view concerned projection grid can efficiently realize the rendering of ocean without boundary. But when using it to deal with the rendering of restricted region, it has some limitations. In this article, we introduce the twice clip method to deal with the restricted region rendering of ocean water. The experiment shows that the twice clip method can solve the problem and achieve good rendering effect and meet the real-time requirement of visual simulation system.