3D Modeling And Scene Simulation Of Typhoon

With the development of social economy, typhoon does great harm to buildings and people in the Seaside Areas in Southeast China, and the trend of damage and influence caused by typhoon is increasing. So it is necessary to impose people's cognition on typhoon, so as to reduce the casualties and property loss to minimal when typhoon comes.The performance of computer has been raised quickly in past several years. Virtual Reality and 3D Visualization Technique is widely used in our life as well. In such a simulated environment, people would have an immersed sense. In view of great danger and contingency of typhoon, Virtual Reality and Visualization Technology provide an effective way to do propaganda of disaster prevention, emergency decision-making and evaluation after disaster .This paper based on typhoon wind-field model, combined with real-time satellite image, to simulate the profile, intensity, track and moving velocity of typhoon. Then reappear the moving of typhoon and its change. Among them, 3D modeling of wind field and scenes visualization is the major work of the paper.After systematic analysis the present wind field model of typhoon, the paper chooses 2D VBogus wind field model and extern it on vertical direction to get a 3D wind field model. It implements the simulation of structure and velocity of typhoon. Because of much influence and uncertain factor during typhoon moving, and considering the restriction on moving direction of typhoon by clear sky regions around it, the paper use the axes of clear sky regions to forecast the track of typhoon, and doing experimental test.Finally based on particle system, this paper developed 3D Visualization System of Typhoon using the VC++ development environment and OpenGL. Functions of this system are as follows: calculation of wind field and track of typhoon, export and import of data and satellite image, realistic rendering of terrain and typhoon and so on, which offers a new method for the research of realistic simulation of disaster scene.