基于速度约束算法的动态布料模拟

针对三维布料动态模拟中质点-弹簧模型易发生超弹性现象的问题,基于速度过滤的思想,提出了质点速度约束方法。该方法建立了一个速度约束不等式,作为超弹性现象是否发生的判断依据;并对不满足约束条件的质点速度进行约束调整,进而避免了超弹性现象的发生。此外,对质点-弹簧模型的内力和外力进行了分析,并对外力中的风力模型进行改进,优化了计算流程,提高了计算速度。实验证明该方法易于实现,稳定性强,并产生了较好的视觉效果。

Dynamic cloth simulation based on velocity constraint

Based on mass spring cloth model，a velocity constraint algorithm produced by velocity filter is presented.The algorithm focuses on the super-elasticity in the dynamic cloth simulation.As the condition of super-elasticity happening，a velocity constraint inequality is built.If the mass’s velocity dissatisfies the inequality，the authors need to restrict and modulate the velocity，avoiding the super-elasticity.This paper also analyses the forces on the model mass，and improves the model for the best efficient.The simulation results show that the new algorithm has good performance and is easy to implement.