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计算机系统应用英文版:2018,27(2):223-229
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布料仿真中的自适应各向异性应变限制研究
(中国科学技术大学 计算机科学与技术学院, 合肥 230027)
Adaptive Anisotropic Strain Limiting in Cloth Simulation
(College of Computer Science and Technology, University of Science and Technology of China, Hefei 230026, China)
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Received:April 24, 2017    Revised:May 24, 2017
中文摘要: 布料仿真技术旨在通过计算机生成逼真的布料动态效果,在虚拟现实、服装动画等领域有着广泛的应用前景. 为了避免仿真过程中布料的过度形变并且提高布料应变的准确性,在布料模拟过程中为布料添加了自适应的各向异性应变限制约束. 首先将布料模型离散化为三角形网格,在每一帧都对布料进行网格重划的基础上,通过定义内积倒数映射,将规定的布料全局应变限制转化为各个三角形形变主轴的局部应变限制,保证了在每次网格重划之后局部应变限制仍然能够和全局应变限制保持一致. 另外在求解过程中,提出了结合罚函数与拉格朗日乘子法的改进方法求解算法得到的约束非线性规划方程. 实验表明,本文所提出的方法有效地提高了应变限制的准确性.
Abstract:Cloth simulation is aimed to generate realistic cloths by the computer. It has a wide application prospect in the visual reality, fashion animation and other fields. In order to avoid the excessive deformation and improve the accuracy of the cloth, we present a technique for strain limiting that dynamically re-calculates anisotropic strain limits. We discretize the cloth model as a triangular mesh, and define the inner-product inverse projection for computing the limits for each principal axis of deformation after remeshing in each frame. It ensures that the local limits of every triangle are adaptive to the global limits. And we propose the improved method to solve the optimization problems by strain limiting. The experimental results show that our technique can effectively improve the accuracy of strain limiting and enhance the realism of the cloth.
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尤祖寰,董兰芳.布料仿真中的自适应各向异性应变限制研究.计算机系统应用,2018,27(2):223-229
YOU Zu-Huan,DONG Lan-Fang.Adaptive Anisotropic Strain Limiting in Cloth Simulation.COMPUTER SYSTEMS APPLICATIONS,2018,27(2):223-229