基于边界元素法的柔软物体变形模拟  

Boundary Element Method Based Soft Object Simulation

作　　者：梅春晖[1] 石教英[1] 

机构地区：[1]浙江大学CAD & CG国家重点实验室,杭州310027

出　　处：《计算机学报》2003年第12期1709-1716,共8页Chinese Journal of Computers

摘　　要：在计算机动画和虚拟现实技术中 ,基于物理的建模方法是高真实感地模拟物体受力变形和运动的有效途径 .近年来基于边界元的物理模型方法因其简捷的计算模式而受到关注 ,该文针对当前边界元模型在视觉效果和计算量上的一些缺陷 ,分别提出了两方面的改进方法 ,基于LOD的动态自适应多分辨率网格边界元模型和近似的非线性边界元的物理模型 ,分别用于在不损失视觉效果的前提下减少计算量以及模拟物体大变形 ,并提出了相应的加速算法 ,取得了较好的效果 .In the Computer Animation and Virtual Reality (VR) applications, physically based modeling is an effective method for soft object deformation and movement simulation. In recent years, Boundary Element Method based modeling method is taken in practice due to its convenient modeling manner for Computer Graphics. But there are some limitations in current simple Boundary Element Method based modeling method, such as the high time consumption and the unsatisfied simulation fidelity in some situations. In this paper, two improvements are introduced for these limitations. The first improvement is the Level of Detail (LOD) technique based dynamical multiresolution representation for Boundary Element Method modeling, which is used to reduce time consumption without loss of simulation fidelity. And for simulating large deformation realistically, the approximate nonlinear Boundary Element Method modeling is presented. With these modeling method improvements, corresponding acceleration algorithms are proposed. In Computer Graphics and VR applications, the improved Boundary Element Method based modeling method can be used more efficiently with high quality.

关 键 词：计算机动画 边界元素法 几何建模 柔软物体 变形模拟 计算机图形学 物理模型 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]