feat(linear-static-3d-euler-beam): step 19 - essential-constraints

2026-08-09 19:46:36 +09:00
parent dc6b670db5
commit f3361bfb4e
6 changed files with 592 additions and 0 deletions
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+#pragma once
+
+#include "fesa/core/status.hpp"
+#include "fesa/math/sparse_matrix.hpp"
+#include "fesa/math/vector.hpp"
+
+namespace fesa {
+
+class DofManager;
+
+struct PartitionedStiffness {
+    SparseMatrix kff;
+    SparseMatrix kfc;
+    SparseMatrix kcf;
+    SparseMatrix kcc;
+};
+
+// Applies the DofManager's stable elimination order without owning equation
+// numbering, load assembly, or a solver policy.
+class EssentialConstraints {
+public:
+    static Result<PartitionedStiffness> partition(
+        const SparseMatrix& full,
+        const DofManager& dofs);
+    static Vector gatherFree(const Vector& full, const DofManager& dofs);
+    static Vector gatherConstrained(
+        const Vector& full,
+        const DofManager& dofs);
+    static Vector reconstructFull(
+        const Vector& freeValues,
+        const Vector& constrainedValues,
+        const DofManager& dofs);
+};
+
+} // namespace fesa