Boundary surface preparation (weld, manifold/orientation, exact self-intersection, feature edges) and mesh.surface.check (#15)

* mesh: boundary surface preparation (weld, manifold and orientation checks, exact self-intersection, feature edges) Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm * engine: mesh.surface.check on an open design's body or an imported surface Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm * engine: struct-init the test session Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm * surface: weld at an absolute distance too; the engine welds CAD tessellations at twice SolidCraft's linear tolerance Faces of a SolidCraft tessellation carry their own copies of shared boundary points, which agree only to within the kernel's tolerance (up to ~2e-6 mm on the test corpus). Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm * docs: surface preparation in the literature survey, architecture and roadmap Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm * surface: simplify after review - The weld distance travels with the mesh (SurfaceMesh::weld_distance, set by Shape::tessellate), so every consumer welds a tessellation correctly without opting in. - Exact tests are infallible on predicates::orient2d_projected (shared with generic_orient2d), and compute each vertex's plane side once per pair with an early reject. - One Box3 for the weld, the BVH and shells; a Half struct for edges; the weld's two lookups share one loop, with chained grid cells; cached normals for feature edges; shared parameter helpers. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm * corpus: boundary surface preparation as a corpus stage 20 of 21 parts are valid boundaries with their expected genus; cross-cylinders' tessellation has cracks and flipped triangles where its two intersection curves meet. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm --------- Co-authored-by: jyviko <[email protected]> Co-authored-by: Claude Opus 5.5 <[email protected]>
2026-10-13 16:01:42 -04:00
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@@ -17,7 +17,7 @@ hex meshes today and it gives the best elements where stresses are read.
 | Milestone | Scope | Status |
 |---|---|---|
 | M0 Foundation | Workspace, quality gates, FE model, command engine with rollback and panic guard, CLI, geometry boundary on SolidCraft | done |
-| M1 Geometry in and surface preparation | Open `.solidcraft` designs with persistent face names, assemblies placed (done); face-tagged 3MF (done); test corpus, `cargo xtask corpus` (done); exact predicates (done); quality metrics and certified validity gate (done); weld, closed/manifold/orientation checks, feature edges | in progress |
+| M1 Geometry in and surface preparation | Open `.solidcraft` designs with persistent face names, assemblies placed (done); face-tagged 3MF (done); test corpus, `cargo xtask corpus` (done); exact predicates (done); quality metrics and certified validity gate (done); weld, closed/manifold/orientation and self-intersection checks, feature edges (`modelcraft-mesh::surface`, `mesh.surface.check`, done) | in progress |
 | M2 Tet meshing and size field | Size field (global, per face and edge seeds, curvature and proximity); Bowyer–Watson Delaunay (exact, symbolic perturbation, verified; `modelcraft-mesh::delaunay`, done); robust CDT boundary recovery (Diazzi et al. 2023); Delaunay refinement, ODT smoothing, sliver removal; tet4 and tet10 with mid-side nodes on the B-rep; mesh verify per set | in progress |
 | M3 First deck | Sets and surfaces bound to SolidCraft face, edge, vertex and body names, resolved after meshing; materials (isotropic and orthotropic elastic, density) with a unit-system label and consistency check; sections (solid, shell, beam profiles) assigned by set; element formulation per region mapped to each solver; BCs (fixed, displacement, symmetry); loads (force and moment on reference points, pressure, gravity); reference points with kinematic and distributing coupling; steps (linear static, frequency) with explicit per-step load and BC tables and output presets; writers for Abaqus input, Nastran SOL 101/103 and LS-DYNA implicit; the `.modelcraft` file | planned |
 | M4 Own solver and first results | Linear static and modal solver (tet4/10, hex8, hex20; sparse direct, Lanczos), verified against analytic solutions; deformed shape, contours, mode shapes, probes, reaction sums | planned |