大规模三维云实时模拟方法 |
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引用本文: | 任威,梁晓辉,马上,沈旭昆. 大规模三维云实时模拟方法[J]. 计算机辅助设计与图形学学报, 2010, 22(4) |
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作者姓名: | 任威 梁晓辉 马上 沈旭昆 |
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作者单位: | 虚拟现实技术与系统国家重点实验室,北京,100191;北京航空航天大学计算机学院,北京,100191 |
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基金项目: | 国家自然科学基金(60873159);;教育部新世纪优秀人才支持计划;;国家“八六三”高技术研究发展计划(2009AA012103) |
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摘 要: | 针对虚拟环境中大规模三维云渲染开销大的问题,提出一种大规模三维云实时模拟方法.在云建模方面,利用Navier-Stokes流体力学公式模拟云的动态生成,提出一种基于八叉树的模型化简策略,减少了云模型粒子数;在渲染阶段,提出一种基于Cell的绘制更新策略,结合Impostor技术自动混合绘制三维云与Impostor,实现了大规模三维云的实时模拟.实验结果表明,该方法基于物理的方法模拟云,同时在绘制阶段根据视点的移动实时更新,效果逼真;与同类方法相比,基于Cell的绘制策略更新时计算量更小,有效地避免了绘制更新时常见的抖动和跳变问题.
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关 键 词: | 虚拟环境 三维云 Cell 实时模拟 |
A Real-Time Simulation Method for Large-Scale 3D Clouds |
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Affiliation: | State Key Laboratory of Virtual Reality Technology and Systems/a>;Beijing 100191;School of Computer Science and Engineering/a>;Beihang University/a>;Beijing 100191 |
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Abstract: | According to the problem of time consuming on large-scale 3D clouds rendering in virtual environment,this paper presents a real-time simulation method for large-scale 3D clouds.In modeling process,the Navier-Stokes equations are adopted for cloud modeling,and a method based on octree is presented to reduce the particle number of the cloud model.In rendering process,impostor technique is used and a schedule algorithm based on Cell is proposed to render the mixed 3D clouds and impostor automatically.As the cl... |
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Keywords: | virtual environment 3D clouds Cell real-time simulation |
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