Sandstorm scene parametric modeling and rendering research
|Course||Applied Computer Technology|
|Keywords||Sandstorm Natural scene simulation Parametric modeling Meteorology Visibility Assessment|
Sandstorm is a strong world-wide multiple severe weather phenomena , endangering the survival of the human environment , the impact of economic and social activities. Sandstorm scene physics-based parametric modeling and rendering for sandstorm disaster forecasting , prevention and dust storms on the environment impact assessment to help, has great social significance and economic value. Chapter 1 of this article describes the scene of the simulated sandstorm significance , recalling the meteorological community and computer graphics theory and technology -related academic research progress and a brief description of the main research work . Chapter 2 describes this first storm formation mechanisms and fluid simulation meteorological model and the model based on the above mechanism , to be a reasonable simplification , using the Eulerian grid-based fluid model for dynamic scenes sandstorm different mechanisms such as: from sand, up-flow and interaction with the environment modeling , respectively . Establish a parameterized sandstorm scene modeling methods, through different physical interface input meteorological parameters such as pressure, temperature , dust grains major radius , dust grain density , surface dryness , scene type, etc. , to generate specific weather conditions different sandstorm scene. Finally simulation model described in the GPU sandstorm in implementation, given the simulated processes. Chapter 3 of this paper presents an improved algorithm for real-time rendering sandstorm scene . Firstly, volume rendering and multi- scattering elaborate mechanisms proposed and implemented a multi -byte slice forward scattering volume rendering model . The model is fully considered dust particles interacting with ambient light , which greatly simplifies the calculation of the overall amount of scattering model : proposed based on meteorological parameters sandstorm scene visibility forecasting model , and uses GPU acceleration technology to realize the different types of varying degrees sandstorm scene real-time rendering . Finally , Chapter 4 , the author of this study summarized the work , and proposed further study of this topic and its key technology development direction .