auto: daily sync

tools/adaptive-isogrid/src/brain/triangulation_gmsh.py

@@ -140,6 +140,9 @@ def generate_triangulation_gmsh(geometry, params):
         hole_centers = []  # For diagnostics
         
         # --- Step 2: Add hole keepouts ---
+        # CRITICAL: Only add holes whose keepout is fully contained within
+        # the inner plate. Partially-outside keepouts cause 1D mesh
+        # intersections → Gmsh fails with 0 triangles.
         for hole in geometry.get('holes', []):
             diameter = float(hole.get('diameter', 10.0) or 10.0)
             
@@ -148,10 +151,22 @@ def generate_triangulation_gmsh(geometry, params):
                 hole_radius = diameter / 2.0
                 keepout_radius = hole_radius * (1.0 + d_keep)
                 
-                # Check if keepout intersects inner plate
-                keepout_poly = Point(cx, cy).buffer(keepout_radius)
-                if not inner_plate.intersects(keepout_poly):
-                    continue
+                # Check if keepout is fully inside inner plate
+                keepout_poly = Point(cx, cy).buffer(keepout_radius, resolution=32)
+                if not inner_plate.contains(keepout_poly):
+                    # Try shrinking keepout to fit: find max radius that fits
+                    dist_to_edge = inner_plate.exterior.distance(Point(cx, cy))
+                    if dist_to_edge <= hole_radius * 1.05:
+                        # Hole center is too close to edge — skip entirely
+                        continue
+                    # Use slightly smaller radius (leave 0.5mm clearance from boundary)
+                    keepout_radius = min(keepout_radius, dist_to_edge - 0.5)
+                    if keepout_radius <= hole_radius * 1.05:
+                        continue
+                    # Re-check containment
+                    keepout_poly = Point(cx, cy).buffer(keepout_radius, resolution=32)
+                    if not inner_plate.contains(keepout_poly):
+                        continue
                 
                 # Add circle
                 center_tag, hole_loop, arc_tags = _add_circle_to_gmsh(
@@ -171,8 +186,11 @@ def generate_triangulation_gmsh(geometry, params):
                 if hole_poly.is_empty or not inner_plate.intersects(hole_poly):
                     continue
                 
-                # Clip to inner plate
-                clipped = inner_plate.intersection(hole_poly)
+                # Clip to inner plate (with inward offset to avoid boundary touching)
+                inner_shrunk = inner_plate.buffer(-0.5)
+                if inner_shrunk.is_empty:
+                    inner_shrunk = inner_plate
+                clipped = inner_shrunk.intersection(hole_poly)
                 if clipped.is_empty or clipped.area < 1.0:
                     continue
                 
@@ -209,7 +227,7 @@ def generate_triangulation_gmsh(geometry, params):
         if hole_curves:
             hole_dist = field.add("Distance")
             field.setNumbers(hole_dist, "CurvesList", hole_curves)
-            field.setNumber(hole_dist, "Sampling", 100)
+            field.setNumber(hole_dist, "Sampling", 50)
             
             hole_thresh = field.add("Threshold")
             field.setNumber(hole_thresh, "InField", hole_dist)
@@ -222,7 +240,7 @@ def generate_triangulation_gmsh(geometry, params):
         # --- Edge/boundary influence field: E(x) ---
         edge_dist = field.add("Distance")
         field.setNumbers(edge_dist, "CurvesList", outer_lines)
-        field.setNumber(edge_dist, "Sampling", 100)
+        field.setNumber(edge_dist, "Sampling", 50)
         
         edge_thresh = field.add("Threshold")
         field.setNumber(edge_thresh, "InField", edge_dist)
@@ -244,17 +262,13 @@ def generate_triangulation_gmsh(geometry, params):
         # Algorithm 6 = Frontal-Delaunay (2D)
         gmsh.option.setNumber("Mesh.Algorithm", 6)
         
-        # Quality settings
+        # Size control — let background field drive sizes
         gmsh.option.setNumber("Mesh.MeshSizeMin", s_min * 0.8)
         gmsh.option.setNumber("Mesh.MeshSizeMax", s_max * 1.2)
         gmsh.option.setNumber("Mesh.MeshSizeFromPoints", 0)
         gmsh.option.setNumber("Mesh.MeshSizeFromCurvature", 0)
         gmsh.option.setNumber("Mesh.MeshSizeExtendFromBoundary", 0)
         
-        # Angle constraints for quality triangles
-        gmsh.option.setNumber("Mesh.MinimumCircleNodes", 12)
-        gmsh.option.setNumber("Mesh.MinimumCurveNodes", 3)
-        
         # --- Step 5: Generate mesh ---
         gmsh.model.mesh.generate(2)