Study On The Parametric Modeling And Rendering Of Sandstorm Scene

A sandstorm is a world-wide disastrous meteorological phenomenon, causing ecological problems, effecting on human health, and impacting the economy and social activities. Physical-based parametric modeling and rendering of sandstorm scene is significant to disaster forecasting and prevention and environmental impact assessment.In chapter 1, we introduce the importance of the simulation of the sandstorm scene, review the related work in the area of meteorology and computer graphics, and briefly describe the main aspect of the research of this paper.This Chapter 2, we argue the meteorological mechanism of sandstorm and the basic theories of fluid simulation. With a reasonable simplification of the mechanism, we use grid-based eulerian fluid simulation method to model the different mechanisms of sandstorm such as:sand blowing, up-flow and interaction with environment. We get a Parametric method to modeling sandstorm scene, which can generate different sandstorm scene by different physical parameters, such as pressure, temperature, dust particles radius, dust density, surface dryness, scene type, etc. Finally, we describe the GPU implementation and processes of this simulation model.Chapter 3 presents an improved real-time rendering algorithm of sandstorm scene. We describe volume rendering and multi-scattering mechanism, and then propose a multi-scattering rendering model using half-angle slice rendering. The model takes into account the interaction between dust particles and light, greatly simplifying the computation. We present a visibility forecast model based on meteorological parameters with GPU technology, and achieve different types of sandstorm scenes in real-time.Finally, the summary and conclusion of this paper are given, as well as the discussion of the further research work.