Abstract: Concerning the cloth undulation in dealing with the super-elasticity, an improved particle constraint algorithm based on mass-spring model was presented. In an iteration cycle, it only adjusted the longest stretch spring, and the other over-stretched springs adaptively made the velocity change. The paper took curtain dynamic simulation as example to implement this algorithm, and the curtain flapped naturally in the wind. The experimental results demonstrate that the proposed algorithm can effectively avoid unrealistic undulation and has strong stability.

Key words: mass-spring model, cloth deformation, undulation phenomena, particle constraint, curtain simulation

摘要： 针对传统质点位置修正方法在处理超弹性现象时的布料抖动问题,提出一种基于质点—弹簧模型的质点约束方法。在每次迭代中只对拉伸最长的弹簧进行位置修正,其余过度拉伸的弹簧只作质点速度调整。算法以窗帘动态模拟为例,快速逼真地模拟了窗帘在外力作用下的飘动效果。实验结果表明,该方法能够抑制超弹性现象的发生,并能有效地避免布料不切实际的抖动,具有较强的稳定性。

关键词: 质点—弹簧模型, 布料变形, 抖动现象, 质点约束, 窗帘模拟