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Author SHA1 Message Date
Hartmut 253f11a945 feat: surface-evaluated normals, GMSH tessellation, draw call batching 
USD exporter:
- Compute normals from B-Rep surface via BRepLProp_SLProps at each vertex
  UV parameter — eliminates faceting on curved surfaces (same as Stepper)
- Add GMSH Frontal-Delaunay tessellation engine (opt-in via --tessellation_engine gmsh)
  with per-solid strategy matching export_step_to_gltf.py
- Use vertex normal interpolation instead of faceVarying (6x smaller normals)
- Default engine remains OCC (GMSH has coordinate-space bug with instanced parts)

Frontend:
- Fix faceted shading in InlineCadViewer: only call computeVertexNormals()
  when geometry lacks normals, preserving smooth GLB normals from pipeline
- Add useGeometryMerge hook for draw call batching (merge by material)
- Fix unused import in cadUtils, optional props in ThreeDViewer

Backend:
- Move dataclass import to top of step_processor.py (PEP 8)
- Unified single-read STEP metadata extraction with fallback

Render worker:
- Fix USD import seam/sharp restoration: read primvars via pxr directly
  (Blender's USD importer doesn't expose custom Int2Array primvars)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-03-13 15:14:23 +01:00
Hartmut cc3071297b feat(M5-M7): embed canonical material names in USD via customData + pxr direct read 
- export_step_to_usd.py: accept --material_map CLI arg, write
  schaeffler:canonicalMaterialName as customData on each Mesh prim,
  fix geometry transform (strip shape Location before face exploration,
  apply both face_loc and shape_loc sequentially)
- import_usd.py: after Blender USD import, use pxr to read customData
  directly from the USD file — builds {part_key: material_name} lookup
  (Blender ignores STRING primvars and customData, but pxr reads both)
- _blender_materials.py: add apply_material_library_direct() for exact
  dict-based material assignment without name-matching heuristics
- _blender_scene_setup.py: prefer direct USD lookup, fall back to
  name-matching for legacy USD files without material metadata
- export_glb.py (generate_usd_master_task): resolve material_map via
  material_service.resolve_material_map() and pass to subprocess;
  include material hash in cache key for invalidation
- ROADMAP.md: update P5 status, add M5-M7 milestones

Tested: 3/3 parts matched (ans_lfs120), 172/175 parts matched
(F-802007.TR4-D1-H122AG). Previous: 0/25 matched.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-03-12 23:04:26 +01:00
Hartmut 71584edce6 docs: learning erfasst - OCC face_loc behavior und GLB-Cache-Invalidierung nach Tessellierungs-Fixes 
Dokumentiert drei neue Learnings aus der GE360-HF Wälzkörper-Positions-Untersuchung:
1. BRepMesh auf Compound: Triangulation in Definition-Space, Face-loc = Instance-Placement
2. IsSame() vs IsPartner() für Assembly-Instanz-Deduplizierung
3. Stale GLB-Cache maskiert Code-Fixes — nach Tessellierungs-Änderungen Cache invalidieren

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-03-12 18:08:48 +01:00