A Research Of Interactive Dynamic Water-surface Modeling And Rendering

Virtual Reality is an integrated information technology which emerged at the end of 20th century. This technology involves of a number of disciplines and a variety of latest result in many information technologies. Its occurrence changed the way that people used to observe and study things. People can create and experience the virtual world with the support of this technology.Water is very common in the nature, so the quality of water simulation will influence the real degree of the whole scene. Otherwise water is very related to people's daily lives, so dynamic water-surface simulation has great significance to lives and scientific research of the people. The research of dynamic water-surface simulation is a hot issue in Virtual Reality. The difficult of dynamic water-surface simulation is decided by the special nature of water. First, water is an irregular liquid, whose motion is very complicate because of many uncertain factors; Secondly because of there is much optical phenomena in the water such as light reflection and refraction. And the last is that it is difficult to find out a balance between real degrees and rendering speed.Since 1970s, people began to study the water-surface simulation and introduced many excellent modeling and rendering methods. In recent years, with the development of programmable GPU and high level shading language, the study of water-surface modeling and rendering entered a new stage. The purpose of this paper is to find out an interactive dynamic water-surface fast rendering algorithm which can produce high real degree result. On the basis of past method, this paper introduces a GPU-based water-surface rendering method. The model is based on the thinking of Ben Humphrey who used the technologies of texture mapping and mobile texture to simulate water-surface. This paper simplifies his model and adds some interactions which can real-time change the direction and speed of water flow, the size of waves and light intensity. Most of rendering progress of this method is completed in GPU. The result of experiment proves that this method can get both fast rendering speed and high real degree images. Because of the simple-ness of the model, the water-surface of this paper can embedded in various scenes and possess the value of research and practically.