基于规则网格的层次化布料动态模拟方法

在布料动态模拟仿真过程中，收敛速度和模拟效率是两个核心指标，可以很好的反应布料在动态过程中的模拟效果。针对布料动态模拟中的收敛速度慢、模拟效率低的问题，提出了一种基于规则网格的层次化模拟方法，实现了基于位置的层次化动态模拟。在该方法中，利用层次化思想在原始网格的基础上构建层次化约束网格，在这个过程中，可以采用不同的决策函数对网格进行精简，构造出更加满足目标要求的约束网格，在构造完成后利用提出的权值关联模型对各层次进行再矫正。在模拟过程中，原始网格利用层次化约束网格从最粗层到最精细层进行收敛矫正，有效避免了传统为提高收敛速度而单一的增加约束矫正迭代次数的问题。为了检验模拟性能，布料在周期钟摆风场下进行了实验。实验表明，在基于规则网格的层次化方法模拟下，能很好的解决传统模拟的约束震荡问题，并且效率高，稳定性好。

Cloth simulation based on grid-hierarchical dynamic simulation method

In the process of cloth dynamic simulation, convergence and efficiency are two core indicators, which can well reflect the performance of simulation. To approve the convergence and quality in cloth dynamic simulation, this paper proposed an approach which based on grid-hierarchical simulation. In this method, a hierarchical constrained grid is constructed on the basis of the original grid using the hierarchical idea, in this process, various decision functions can be used to streamline the grid to adapt different target requirements. After the construction is completed, the proposed weighted association model is used to rectify each level. In the process of simulation, the proposed approach used hierarchical constraint grid to constrain the original grid from the coarse layer to the finest layer to improve the convergence speed, which effectively avoids the problem of increasing the number of iterations in the traditional way. To show the simulation performance, this paper simulates dynamic cloth under the cycle pendulum wind field. The results shows that under the simulation of grid-hierarchical method, it can well solve the constraint oscillation problem of the traditional simulation, and the proposed method is more efficiency and stable.