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Simulation and Rendering of Anistropic Scattering Clouds in Sky Scene Based on Distribution Function

Author: MaYing
Tutor: LvMengYa
School: Yanshan University
Course: Applied Computer Technology
Keywords: Cloud simulation Empty battlefield of days simulation Distribution function Table query Phase function Impostor texture
CLC: TP391.9
Type: Master's thesis
Year: 2010
Downloads: 53
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Abstract


By the national \This is the project's sub-topics , the study aerospace roaming cloud modeling and rendering . Cloud as an important part of the air and space battlefield environment , a very important influence on the authenticity of the environment simulation results . Air and space battlefield simulation , however , is a large and complex system , there are a lot of elements , cloud simulation must take up very little resources ; simulated the physical processes of cloud formation is extremely complex and varied shape , to meet the air and space battlefield environment in shapes and high real-time cloud it is very meaningful . First, for the particle system simulation cloud timeliness low cloud modeling method proposed the use of a distribution function , thereby controlling the shape of the cloud particle attributes controlled by setting the type of the distribution function , use the function to control the particle trajectory demise solve particle system modeling process due to the large number of particles and the law of motion difficult to extract real-time system . Secondly, the complex propagation path of light in the clouds , the texture data , the problem of large , the introduction the shadow association table and the deformation of the ball light texture database table query technology , in the preprocessing stage , the corresponding texture is calculated and stored in the shadow Relevance table , drawn by index query for texture data , shorten the rendering time . Then , in the real-time rendering stage using patch-texture the Impostor texture way to draw in order to meet the requirements of different viewpoints from the cloud of detail ; Impostor texture scaling error correction performance optical anisotropy in the clouds the scattering properties of the scattering phase function to be optimized to achieve the the cloud particles multiplet anisotropic scattering . Finally, the use of VC and OpenGL programming tool on an ordinary PC , designed drawing of a single cloud and join the cloud empty days roaming system . The experiments show that : the generated cloud authenticity better draw high efficiency to meet the air and space in the battlefield environment . The work done to explore and determine the authenticity and real-time cloud simulation , for aerospace simulation of the battlefield environment is of great significance .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Computer simulation
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