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[FEM] Expand source term integration to non-constant sources and example - #6290

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[FEM] Expand source term integration to non-constant sources and example#6290
th-skam wants to merge 17 commits into
sofa-framework:masterfrom
th-skam:sourceTerm-nonconst

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@th-skam

@th-skam th-skam commented Sep 2, 2026

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PR is based on #6196. Extends the FEMSourceTermIntegrator class to aggregate contributions from non-constant source terms that change with the displacement of the nodes.

As an example, the NonConstantSourceTerm.scn example replicates what SurfacePressureForceField does with a TractionSourceTerm class.

Red: SurfacePressureForceField, White: TractionSourceTerm.
image

Haven't settled fully on how we could handle multiple terms inside a Node but it could be a start.

@th-skam th-skam added pr: status to review To notify reviewers to review this pull-request pr: experimental Demonstrate an experimental feature labels Sep 2, 2026
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