FractureFields: Contact-Aware Binary Multi-Field Transfer for Fractured 3D Gaussian Simulation

2026-08-28

AI Summary

该研究通过引入FractureFields方法，解决了3D高斯模拟中物体断裂后不同碎片间动量泄漏的问题，利用拓扑自适应传输与接触感知的二进制多场转移技术。

Abstract

Physics-integrated 3D Gaussian representations make it possible to simulate image-reconstructed assets directly as particles, but current Gaussia-MPM pipelines keep a single Eulerian velocity field even after fracture. When disconnected fragments share interpolation support, they still write to and read from the same grid nodes, producing cross-fragment momentum leakage that appears as residual adhesion and non-physical stretching. We present FractureFields, a topology-adaptive transfer for fractured 3D Gaussian objects. After a structural event assigns persistent fragment identities, FractureFields builds fragment-specific mass and momentum fields in a single P2G pass, advances each field independently, and performs a field-aware G2P update so particles only sample their own fragment's grid state. To handle re-contact, we add a momentum-conserving contact projection that applies equal and opposite normal impulses only when two fragment fields are approaching, preserving free separation otherwise. Experiments on reconstructed scenes and a controlled re-contact benchmark show that fragment-conditioned routing eliminates realized cross-fragment mixing by construction, while contact projection reduces interpenetration during collision without reintroducing residual coupling. Overall, we argue that post-fracture simulation should treat structural disconnection as a change in local dynamical state, not merely a change in constitutive stress.

Problem

• Fracture
• Gaussian-MPM
• Cross-fragment momentum leakage
• Eulerian velocity field
• Physics-integrated 3D Gaussian

Innovation

• FractureFields
• topology-adaptive transfer
• fragment-specific fields
• momentum-conserving contact projection
• post-fracture simulation