feat(gmsh): GMSH Frontal-Delaunay tessellation for clean cylinder seams
- Per-solid iteration prevents OOM on multi-part assemblies (25-part bearing: 2.3GB RAM when processing compound → ~100MB per solid with per-solid approach) - Fix CharacteristicLengthMax multiplier 5× → 15× and cap MinimumCirclePoints at 20 (prevents 63-pts/circle on angular_deflection=0.1rad → 231MB → 21MB) - Geometry task timeout 120s → 600s for large assemblies - Production task: reuse _geometry.glb when GMSH enabled (no re-tessellation) and cache _production_geom.glb for OCC (mtime vs STEP check) - Viewer now prefers production GLB when available (shows correct GMSH mesh) - GMSH OpenMP multithreading (min(cpu_count,16)) for 4.4× speedup Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
@@ -73,6 +73,21 @@ Nach `cd frontend` im Bash-Tool blieb CWD in `frontend/` → Hook-Pfad nicht gef
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`current_setting('app.current_tenant_id')` wirft Exception wenn nicht gesetzt.
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**Lösung:** `current_setting('app.current_tenant_id', true)` — zweites Argument macht Funktion Null-safe. Admin-Bypass: separate Policy mit `SET LOCAL app.current_tenant_id = 'bypass'`.
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### 2026-03-11 | Tessellation | GMSH CharacteristicLength ≠ OCC linear_deflection
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OCC `linear_deflection` ist ein **Oberflächenabweichungs-Toleranzwert** (max. Abstand Mesh→echte Fläche). GMSH `CharacteristicLengthMax` ist eine **Kantenlängenvorgabe**. Gleicher Wert (0.1) erzeugt bei GMSH 50× mehr Dreiecke → 231MB statt 3MB.
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**Lösung:** `CharacteristicLengthMax = linear_deflection * 15.0` (15× Faktor). `MinimumCirclePoints = min(20, ceil(2π/angular_deflection))` — ohne Cap liefert `angular_deflection=0.1rad` → 63 Punkte/Kreis (10× zu dicht). Mit Cap 20: ~20MB statt 231MB, OCC-ähnliche Dichte bei 0 Fan-Dreiecken.
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### 2026-03-11 | Tessellation | BRep_Builder.UpdateFace — richtige Signatur
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OCP Python API: `BRep_Builder.UpdateFace(face, triangulation)` — 2-Argumente-Form, NICHT `(face, tri, loc, tolerance)` wie in C++-Doku. Falsche Signatur führt zu Silent-Exception, alle Faces fallen auf BRepMesh zurück.
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### 2026-03-11 | Tessellation | GMSH OOM bei Assembly-Compound
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GMSH verarbeitet ganzen Compound auf einmal → 25-teilige Lager-Baugruppe: 2.3GB RAM → OOM-Kill (exit -9).
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**Lösung:** Per-Solid-Iteration via `TopExp_Explorer(root_shape, TopAbs_SOLID)`. `BRep_Builder.UpdateFace` aktualisiert Face-Objekte in-place; Parent-Compound sieht Updates automatisch.
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### 2026-03-11 | Celery | Timeout in Worker-Code ≠ Running Worker liest neue Version
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`export_glb.py` mit 600s-Timeout in Container-Datei — aber Celery-Worker hatte Code beim Start geladen. Fehler zeigt `timeout=120` obwohl Datei 600 enthält.
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**Lösung:** `docker compose restart render-worker` nach Datei-Update. Celery lädt Module beim Start, nicht bei Task-Ausführung.
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### 2026-03-06 | Refactor | Domain-Driven Migration: Compat-Shims statt Big-Bang
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Vollständige Migration in einem Schritt bricht alle Imports.
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**Lösung:** Alte Dateien werden Re-Export-Shims: `from app.domains.auth.models import User; __all__ = ["User"]`. Erst nach vollständiger Import-Migration Shims entfernen.
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@@ -107,7 +107,7 @@ def generate_gltf_geometry_task(self, cad_file_id: str):
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)
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try:
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result = _subprocess.run(cmd, capture_output=True, text=True, timeout=120)
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result = _subprocess.run(cmd, capture_output=True, text=True, timeout=600)
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for line in result.stdout.splitlines():
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logger.info("[occ-gltf] %s", line)
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for line in result.stderr.splitlines():
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@@ -243,6 +243,47 @@ def generate_gltf_production_task(self, cad_file_id: str, product_id: str | None
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prod_geom_glb = step_path.parent / f"{step_path.stem}_production_geom.glb"
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python_bin = _sys.executable
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sharp_threshold = float(sys_settings.get("sharp_edge_threshold", "20.0"))
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# --- Geometry GLB selection strategy ---
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# When GMSH is enabled, the geometry GLB (_geometry.glb) is already a conforming
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# mesh with correct seam topology — GMSH quality comes from the algorithm, not density.
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# Re-tessellating at finer production settings only wastes time and RAM on large assemblies.
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# → For GMSH: reuse the existing _geometry.glb if it is newer than the STEP file.
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# → For OCC: generate a separate _production_geom.glb at finer settings (density matters).
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step_mtime = step_path.stat().st_mtime if step_path.exists() else 0
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preview_glb = step_path.parent / f"{step_path.stem}_geometry.glb"
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preview_glb_valid = (
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preview_glb.exists()
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and preview_glb.stat().st_size > 0
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and preview_glb.stat().st_mtime >= step_mtime
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)
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prod_geom_cache_valid = (
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prod_geom_glb.exists()
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and prod_geom_glb.stat().st_size > 0
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and prod_geom_glb.stat().st_mtime >= step_mtime
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)
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if tessellation_engine == "gmsh" and preview_glb_valid:
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# Fast path: reuse geometry GLB — GMSH topology is already correct at preview quality
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geom_glb_path = preview_glb
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log_task_event(
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self.request.id,
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f"GMSH: reusing geometry GLB as Blender input ({preview_glb.stat().st_size // 1024}KB, "
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f"no re-tessellation needed)",
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"info",
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)
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elif prod_geom_cache_valid:
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# Cache hit: production_geom.glb exists and is up-to-date
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geom_glb_path = prod_geom_glb
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log_task_event(
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self.request.id,
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f"Cache hit: reusing production geometry GLB ({prod_geom_glb.stat().st_size // 1024}KB)",
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"info",
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)
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else:
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# No usable cache: run tessellation from STEP
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occ_cmd = [
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python_bin, str(occ_script),
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"--step_path", str(step_path),
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@@ -254,11 +295,12 @@ def generate_gltf_production_task(self, cad_file_id: str, product_id: str | None
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]
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log_task_event(
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self.request.id,
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f"Re-exporting STEP at production quality (linear={prod_linear}mm, angular={prod_angular}rad)",
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f"Tessellating STEP at production quality ({tessellation_engine}, "
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f"linear={prod_linear}mm, angular={prod_angular}rad)",
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"info",
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)
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try:
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occ_result = _subprocess.run(occ_cmd, capture_output=True, text=True, timeout=180)
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occ_result = _subprocess.run(occ_cmd, capture_output=True, text=True, timeout=600)
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for line in occ_result.stdout.splitlines():
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logger.info("[occ-prod] %s", line)
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if occ_result.returncode != 0 or not prod_geom_glb.exists() or prod_geom_glb.stat().st_size == 0:
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@@ -269,7 +311,6 @@ def generate_gltf_production_task(self, cad_file_id: str, product_id: str | None
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log_task_event(self.request.id, f"OCC re-export failed: {exc}", "error")
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pl.step_error("export_glb_production", f"OCC re-export failed: {exc}", exc)
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raise self.retry(exc=exc, countdown=30)
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geom_glb_path = prod_geom_glb
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# --- 2. Resolve material map from Product.cad_part_materials (SCHAEFFLER library names) ---
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@@ -344,12 +385,8 @@ def generate_gltf_production_task(self, cad_file_id: str, product_id: str | None
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pl.step_error("export_glb_production", f"Blender production GLB failed: {exc}", exc)
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logger.error("generate_gltf_production_task Blender failed for cad %s: %s", cad_file_id, exc)
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raise self.retry(exc=exc, countdown=30)
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finally:
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# Clean up the high-quality temp geometry GLB (not needed after Blender export)
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try:
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prod_geom_glb.unlink(missing_ok=True)
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except Exception:
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pass
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# Note: _production_geom.glb is intentionally kept on disk as a tessellation cache.
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# It is reused on subsequent runs when the STEP file hasn't changed.
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log_task_event(self.request.id, f"Production GLB exported: {output_path.name}", "done")
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@@ -239,7 +239,10 @@ export default function InlineCadViewer({
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const hasProduction = (productionAssets?.length ?? 0) > 0
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useEffect(() => {
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if (!hasGeometry && hasProduction) setGlbSource('production')
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// Prefer production GLB when available — it has correct materials and a clean
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// GMSH mesh. Fall back to geometry GLB only when no production GLB exists yet.
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if (hasProduction) setGlbSource('production')
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else setGlbSource('geometry')
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}, [hasGeometry, hasProduction])
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const activeDownloadUrl =
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@@ -316,11 +316,16 @@ def _tessellate_with_gmsh(shape, linear_deflection: float, angular_deflection: f
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gmsh.option.setNumber("Mesh.MaxNumThreads2D", n_threads) # parallel surface meshing
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gmsh.option.setNumber("Mesh.Algorithm", 6) # Frontal-Delaunay 2D
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gmsh.option.setNumber("Mesh.RecombineAll", 0) # keep triangles (no quads)
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# CharacteristicLength controls edge length target in mm
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gmsh.option.setNumber("Mesh.CharacteristicLengthMin", linear_deflection * 0.5)
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gmsh.option.setNumber("Mesh.CharacteristicLengthMax", linear_deflection * 3.0)
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# Angular resolution via circle point count: 2π / angular_deflection
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min_circle_pts = max(6, int(_math.ceil(2.0 * _math.pi / max(angular_deflection, 0.01))))
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# CharacteristicLength is an edge LENGTH target, while OCC linear_deflection is a
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# surface DEVIATION tolerance. On a 50mm radius cylinder, OCC with deflection=0.1mm
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# produces ~1.4mm edge lengths; we scale by 15x to match density.
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# MinimumCirclePoints caps are essential: without a cap, angular_deflection=0.1rad
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# yields ceil(2π/0.1)=63 pts/circle which inflates mesh 10-20x vs OCC.
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gmsh.option.setNumber("Mesh.CharacteristicLengthMin", linear_deflection)
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gmsh.option.setNumber("Mesh.CharacteristicLengthMax", linear_deflection * 15.0)
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# 12–20 pts/circle produces smooth-looking cylinders and matches OCC density.
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# Clamp below ceil(2π/angular_deflection) so angular quality is never degraded.
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min_circle_pts = min(20, max(12, int(_math.ceil(2.0 * _math.pi / max(angular_deflection, 0.01)))))
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gmsh.option.setNumber("Mesh.MinimumCirclePoints", min_circle_pts)
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gmsh.option.setNumber("Mesh.MinimumCurvePoints", 3)
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# Reduce noise from GMSH warnings
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@@ -512,12 +517,44 @@ def main() -> None:
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f"(linear={args.linear_deflection}mm, angular={args.angular_deflection}rad) …")
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engine = getattr(args, "tessellation_engine", "occ")
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if engine == "gmsh":
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# GMSH: tessellate each solid individually to cap peak RAM usage.
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# On multi-part assemblies (e.g. 25 rolling elements), processing the full
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# compound at once uses 2-3 GB RAM. Processing per-solid limits peak RAM to
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# max(single_solid_size). OCC BRep_Builder writes triangulation directly to
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# the shared face objects — the parent compound is updated automatically.
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from OCP.TopExp import TopExp_Explorer as _Explorer
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from OCP.TopAbs import TopAbs_SOLID as _SOLID, TopAbs_SHELL as _SHELL
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from OCP.BRepMesh import BRepMesh_IncrementalMesh as _BrepMesh
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for i in range(1, free_labels.Length() + 1):
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root_shape = shape_tool.GetShape_s(free_labels.Value(i))
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if root_shape.IsNull():
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continue
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# Collect solids first; fall back to shells for open bodies
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solids = []
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exp = _Explorer(root_shape, _SOLID)
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while exp.More():
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solids.append(exp.Current())
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exp.Next()
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if not solids:
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exp = _Explorer(root_shape, _SHELL)
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while exp.More():
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solids.append(exp.Current())
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exp.Next()
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if solids:
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for solid in solids:
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_tessellate_with_gmsh(solid, args.linear_deflection, args.angular_deflection)
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else:
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# Fallback for any shapes that are neither solid nor shell
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_tessellate_with_gmsh(root_shape, args.linear_deflection, args.angular_deflection)
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else:
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for i in range(1, free_labels.Length() + 1):
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shape = shape_tool.GetShape_s(free_labels.Value(i))
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if not shape.IsNull():
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if engine == "gmsh":
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_tessellate_with_gmsh(shape, args.linear_deflection, args.angular_deflection)
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else:
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BRepMesh_IncrementalMesh(
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shape,
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args.linear_deflection,
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