Integration-point variables and a semi-Lagrangian history at the integration points - #703

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lmoresi merged 16 commits into

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feature/quadrature-point-space

Sep 8, 2026

Commits on Sep 6, 2026

Quadrature-point (delta) finite element as a PETSc plugin space

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d1cc658
IntegrationPointVariable: a public field stored at the mesh integration points

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178edbb
IntegrationPointSemiLagrangian: SLCN history at the integration points

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90857d9
IntegrationPointSemiLagrangian: refuse an under-sampled rule; measurements

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5e4a434
IntegrationPointSemiLagrangian: stability measured by power iteration

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e46f49a

Commits on Sep 7, 2026

Semi-Lagrangian trace-back: mid-point velocity at the mid time

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78cbf67
SemiLagrangian: midtime_velocity switch (False = the pre-2026-09 v^n-only trace)

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c903007
SemiLagrangian: copy the velocity variable's data into v_prev when V_fn is its symbol

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cfb1d96
Semi-Lagrangian velocity history: snapshot the variables inside V_fn

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b9e1125
Semi-Lagrangian velocity history: cache by evaluation at the true nodes

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e1d6894
Tests: make the integration-point tests rank-aware

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c4562ba
Semi-Lagrangian velocity cache and integration-point history: units frame

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5c1549a

Commits on Sep 8, 2026