Cloth Animation Based on Implicit Constraint Dynamics

Cloth animation has been one of the hottest topics in the field of computer graphics for many years. Simulating inextensible cloth with wrinkles is one of the challenges. To prevent the over-stretching in cloth animation, effective constraints are usually introduced into the system. However, existing cloth solvers have established the constraints in disregard of the relationship between stretching and bending deformation, so that the final animation is not satisfactory. In this paper, a novel method of cloth animation based on implicit constraint dynamics is proposed. Firstly, the bending deformation of cloth is analyzed from micro-mesh view, based on which an adaptive constraint is established to structure and shear tensile. By applying the constraints, over-elongation deformation can be avoided while wrinkles are not prevented on cloth. At the same time, global collision constraints are established to prevent the penetration, which can avoid the over-elongation that can be easily caused by locally moving particles. Secondly, constraint dynamic equation including implicit constraints is developed that is solved by constraint manifold iterative refinement method. Finally, experiments are conducted and the analysis and evaluation are given. The results show that our method is stable and effective, which ensures the realistic and effective cloth simulation.