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| 烟雾的快速模拟 |
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童若锋1,2, 陈凌钧3, 汪国昭3
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1.浙江大学人工智能研究所,杭州,310027;2.浙江大学 CAD&CG 国家重点实验室,杭州,310027;3.浙江大学应用数学系,杭州,310027
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| 摘要: |
| 文章提出利用粒子系统和浓度场相结合的方法来模拟烟雾的运动与扩散.在粒子属性中加入一浓度函数,通过粒子作用半径及浓度函数的变化模拟烟雾的扩散,还通过粒子的运动及分裂反映风力场的作用.与原有的粒子系统相比,不仅增加了对烟雾扩散的描述,还可以用少量的粒子生成连续的浓度场,在很大程度上提高了计算速度.同时文章还给出了一种快速的烟雾绘制方法. |
| 关键词: 动态模拟,粒子系统,浓度场,光线投射. |
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| 基金项目:本文研究得到国家自然科学基金、国家教育部博士点基金、浙江省自然科学基金和浙江大学曹光彪基金资助. |
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| A Method for Quick Smog Simulation |
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TONG Ruo-feng,CHEN Ling-jun,WANG Guo-zhao
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| Abstract: |
| In this paper, a method of combining particle system with density fields is presented to simulate smog movement and diffusion . By attaching a density function to the particle attributes, smog diffusion is simulated through the variance of particle effect radius and density functions, effect of turbulence is imitated through particle movement and fragmentation. Compared with the traditional particle system, this method can describe smog diffusion and produce continuous density fields with less particles, the computation is thus greatly speeded up. A quick algorithm for smog rendering is also presented for real-time simulation. |
| Key words: Dynamic simulation, particle system, density field, ray casting. |
