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Stable SDF-Based Collision Handling for Cloth-Solid Interaction in Position-Based Dynamics

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2026, 31(2), pp.123~130
  • DOI : 10.9708/jksci.2026.31.02.123
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science
  • Received : November 6, 2025
  • Accepted : January 20, 2026
  • Published : February 27, 2026

Jong-Hyun Kim 1

1인하대학교

Accredited

ABSTRACT

This paper presents an efficient and stable PBD-based collision handling method for cloth–solid interaction. Conventional iterative constraint projections often produce trembling artifacts during collision response, degrading visual quality and stability. To mitigate this, we propose an SDF-based scheme that decomposes vertex velocities into normal and tangential components: the normal component is stably attenuated while tangential motion is preserved, enabling smooth sliding without oscillation. We further propagate velocity corrections to neighboring face and edge vertices to maintain consistent projections across adjacent regions. Integrated into a sub-stepped PBD solver, the method improves collision stability with negligible overhead. Experiments show reduced surface trembling and more continuous, physically plausible motion, making the approach suitable for real-time cloth simulation and interactive virtual garment applications.

Citation status

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