ADMM superset of Projective Dynamics: Fast Simulation of Hyperelastic Models with Dynamic Constraints

作者：Overby Matthew^*; Brown George E; Li Jie; Narain Rahul

来源：IEEE Transactions on Visualization and Computer Graphics, 2017, 23(10): 2222-2234.

DOI：10.1109/TVCG.2017.2730875

• Computer graphics
• animation
• computer simulation
• optimization methods
• dynamics

We apply the alternating direction method of multipliers (ADMM) optimization algorithm to implicit time integration of elastic bodies, and show that the resulting method closely relates to the recently proposed projective dynamics algorithm. However, as ADMM is a general purpose optimization algorithm applicable to a broad range of objective functions, it permits the use of nonlinear constitutive models and hard constraints while retaining the speed, parallelizability, and robustness of projective dynamics. We further extend the algorithm to improve the handling of dynamically changing constraints such as sliding and contact, while maintaining the benefits of a constant, prefactored system matrix. We demonstrate the benefits of our algorithm on several examples that include cloth, collisions, and volumetric deformable bodies with nonlinear elasticity and skin sliding effects.

• 出版日期2017-10