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[SpringForceField] Add stiffness matrix computation to JointSpringForceField #5936

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[SpringForceField] Add stiffness matrix computation to JointSpringForceField #5936

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@alxbilger alxbilger commented Feb 4, 2026 •
edited by fredroy
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Supersedes #5895.

Blind attempt to implement buildStiffnessMatrix in JointSpringForceField. The implementation is based on addDForce, and in particular the method addSpringDForce.

I tested the scene JointSpringForceField.scn in the examples, but I suspect a problem in the scene. There are no unit tests, so this implementation couldn't be tested.

[with-all-scenes]

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  • it does not generate new scene test failures.
  • it does not break API compatibility.
  • it is more than 1 week old (or has fast-merge label).

@alxbilger alxbilger added pr: enhancement About a possible enhancement pr: status to review To notify reviewers to review this pull-request pr: ai-generated Label notifying the reviewers that part or all of the PR has been generated with the help of an AI labels Feb 4, 2026
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fredroy commented Feb 4, 2026

[ci-build][with-all-scenes]

@fredroy fredroy linked an issue Feb 4, 2026 that may be closed by this pull request
JointSpringForceField scene not working #5893
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@bakpaul bakpaul mentioned this pull request Feb 5, 2026
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JointSpringForceField scene not working

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