Abstract
AbstractBecause of the advantages of high stability and efficiency, position‐based dynamics (PBD) is becoming increasingly popular with game developers and filmmakers. On the basis of the unified adaptive PBD, we present a nonlinear cloth wetting model to simulate visually realistic cloth wetting phenomena, which takes into account the influence of gravity on all aspects of the wetting process. Specifically, in order to model water diffusion in unsaturated cloth, we propose a novel nonlinear saturation constraint of cloth particles, which considers the influence of gravity, and then solve it using PBD to stably smooth the saturation field. The dynamic behaviors of the cloth and the water–cloth coupling during the cloth wetting process are modeled by using PBD. Moreover, a water absorption model and a water emission model are proposed to simulate the unsaturated cloth absorbing water and the oversaturated cloth draining water under the influence of gravity, respectively. The experimental results demonstrate that our novel wetting model provides an efficient way to model more stable and realistic cloth wetting phenomena using PBD.
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