Divergent behavior of FastTetrahedralCorotationalForceField

[ScheiklP]

Problem

With the same exact parameters, FastTetrahedralCorotationalForceField shows unstable behavior, compared to TetrahedralCorotationalFEMForceField.

Expected behavior I would expect both components to show the same behavior, or at least to be stable.

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Environment

Context

• System: Ubuntu 23.10
• Version of SOFA: v23.12
• State: Release

TetrahedralCorotationalFEMForceField

FastTetrahedralCorotationalForceField

Object code: https://github.com/ScheiklP/sofa_env/blob/main/sofa_env/scenes/ligating_loop/sofa_objects/cavity.py#L197

Cheers, Paul