Parametric Modeling and Reai-time Rendering of Sandstorm Scenes

Sandstorm is a catastrophic natural phenomenon.To quantitative modeling and realistic rendering of sandstorm are of great significance in environment protection,disaster rescue,urban traffic and special effects synthesis in films &TV,etc.This paper presents a parametric modeling method of sandstorm based meteorology.In particular,by analyzing the correlation between the up-flow and temperature field,we provide a simplified model to simulate the process of sand raising and flow.Different sandstorm under various circumstances can be simulated by specifying their corresponding parameters such as air pressure,temperature,dust density,the type of surroundings,etc,To real-time render the sandstorm scene,we adopt the half-angle slice based volume rendering method,which greatly reduces the computation cost.Our simulation results of different degree sandstorms in deserts and cities demonstrate the efficiency of the proposed approach.Finally,we employ the meteorological computing model to evaluate the air visibility of the synthesized sandstorm scenes.