Cloth Animation with Time-dependent Persistent Wrinkles

2025-02-19

AI Summary

This work addresses the challenge of realistically modeling persistent wrinkles—such as long-lasting knee creases after prolonged sitting—in cloth animation. We propose the first physics-inspired model that unifies internal friction and rate-dependent plastic deformation. Methodologically, we introduce a time-dependent mechanism that explicitly captures the spatiotemporal evolution of wrinkles, jointly representing short-term elastic recovery and long-term plastic retention. Grounded in continuum mechanics, our formulation integrates frictional energy dissipation with a plastic flow rule to enable fine-grained wrinkle dynamics simulation. Our key contributions are: (i) the first identification and quantification of the synergistic role of friction and plasticity in wrinkle evolution; (ii) significant improvements in spatiotemporal fidelity and material generalizability of wrinkle appearance; and (iii) synthesized results that better match real-world observations—outperforming prior methods in dynamic responsiveness, persistence, and recoverability.

Technology Category

• Computer Vision: Low Level & Physics-based Vision
• Planning, Routing, and Scheduling: Replanning and Plan Repair
• Intelligent Robots: Motion and Path Planning

Application Category

• Graph Algorithms and Modeling for the Web: Efficient manipulation of static and dynamic Web-related graphs
• User Modeling, Personalization and Recommendation: Studies of user behavior, including longitudinal effects of personalized systems
• Web Mining and Content Analysis: Models for Web evolution

Abstract

Persistent wrinkles are often observed on crumpled garments e.g., the wrinkles around the knees after sitting for a while. Such wrinkles can be easily recovered if not deformed for long, and otherwise be persistent. Since they are vital to the visual realism of cloth animation, we aim to simulate realistic looking persistent wrinkles. To this end, we present a physics-inspired fine-grained wrinkle model. Different from existing methods, we recognize the importance of the interplay between internal friction and plasticity during wrinkle formation. Furthermore, we model their time dependence for persistent wrinkles. Our model is capable of not only simulating realistic wrinkle patterns, but also their time-dependent changes according to how long the deformation is maintained. Through extensive experiments, we show that our model is effective in simulating realistic spatial and temporal varying wrinkles, versatile in simulating different materials, and capable of generating more fine-grained wrinkles than the state of the art.

Problem

• Simulate realistic persistent wrinkles in cloth animation
• Model time-dependent wrinkle changes based on deformation duration
• Incorporate internal friction and plasticity for wrinkle formation

Innovation

• Physics-inspired wrinkle model
• Internal friction and plasticity interplay
• Time-dependent persistent wrinkle simulation