脉动风场中的飘雪模拟
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摘要
飘雪场景的模拟可以大大提高虚拟场景的逼真效果,其中风场的建模是重要的环节.为更真实的表现风的随机性,本文基于格子BGK建立风场,用D3Q7模型改进三维风场的建模方法,引入湍流强度的概念描述风场的湍流程度,根据地表面的粗糙程度和离地高度确定其大小,实验表明该方法能更好的增强模拟风场中飘雪场景的真实性.
The simulation of the falling snow could greatly improve the realism of the virtual scene.The modeling for the wind field is a most important part.To perform the random of the wind more veridically,in this article,we build the wind field based on the lattice BGK,and improve the modeling for the three-dimensional wind field with the D3Q7 model.We introduce the turbulence intensity to describe the turbulent of the wind field,and determine its size by the height and the roughness on the terrain surface.The experiments demonstrate that our method can meet the needs of the authenticity of the floating snow simulation much better.
The simulation of the falling snow could greatly improve the realism of the virtual scene.The modeling for the wind field is a most important part.To perform the random of the wind more veridically,in this article,we build the wind field based on the lattice BGK,and improve the modeling for the three-dimensional wind field with the D3Q7 model.We introduce the turbulence intensity to describe the turbulent of the wind field,and determine its size by the height and the roughness on the terrain surface.The experiments demonstrate that our method can meet the needs of the authenticity of the floating snow simulation much better.
引文
[1]Langer M S.A spectral-particle hybrid method for rendering fallingsnow[R].Eurographics Symposium on Rendering,Montreal,2004.
[2]Moeslund T B.Modeling falling and accumulating snow[Z].Den-mark:Computer Vision and Media Technology,Aalborg University,2005.
[3]Masselot.Cellular automata modeling of snowtransport by wind[C].Lecture Notes in Computer Science,Berlin,1995,429-435.
[4]Bryan E Feldman,James F O′Brien.Modeling the accumulation ofwind-driven snow[C].In Proceedings of ACMSiggraph,2002,218-218.
[5]Wei Xiao-ming,Klaus Mueller.The lattice boltzmann method forsimulating gaseous phenomena[J].IEEE Transactions on Visualiza-tion and Computer Graphics,2004,10(2):164-176.
[6]Wei Xiao-ming,Zhao Ye.Lattice-based flow field modeling[J].IEEE Transactions on Visualization and Computer Graphics,2004,10(6):721-723.
[7]Zhang Xi-qian.Advances in research of simulation technology offluctuation wind loading[C].Journal of Earthquake Engineering andEngineering Vibration,2008,28(6):206-210.
[8]Wang Chang-bo.Photorealistic rendering of natural scenery based onphysical model[D].Zhejiang University,2006.
[7]张希黔.脉动风场模拟技术的研究与进展[C].地震工程与工程振动,2008,28(6):206-210.
[8]王长波.基于物理模型的自然景物真实感绘制[D].浙江大学,2006.
[2]Moeslund T B.Modeling falling and accumulating snow[Z].Den-mark:Computer Vision and Media Technology,Aalborg University,2005.
[3]Masselot.Cellular automata modeling of snowtransport by wind[C].Lecture Notes in Computer Science,Berlin,1995,429-435.
[4]Bryan E Feldman,James F O′Brien.Modeling the accumulation ofwind-driven snow[C].In Proceedings of ACMSiggraph,2002,218-218.
[5]Wei Xiao-ming,Klaus Mueller.The lattice boltzmann method forsimulating gaseous phenomena[J].IEEE Transactions on Visualiza-tion and Computer Graphics,2004,10(2):164-176.
[6]Wei Xiao-ming,Zhao Ye.Lattice-based flow field modeling[J].IEEE Transactions on Visualization and Computer Graphics,2004,10(6):721-723.
[7]Zhang Xi-qian.Advances in research of simulation technology offluctuation wind loading[C].Journal of Earthquake Engineering andEngineering Vibration,2008,28(6):206-210.
[8]Wang Chang-bo.Photorealistic rendering of natural scenery based onphysical model[D].Zhejiang University,2006.
[7]张希黔.脉动风场模拟技术的研究与进展[C].地震工程与工程振动,2008,28(6):206-210.
[8]王长波.基于物理模型的自然景物真实感绘制[D].浙江大学,2006.
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