Fix indentation and exception pairing in create_3d_model

app.py

@@ -147,28 +147,80 @@ def create_3d_model(buildings: List[Dict]) -> trimesh.Scene:
         except Exception as e:
             if debug: print(f"   ↳ skipping: polygon error: {e}")
             continue
-        
-        # **Extrude + orient + add all in one try/except**
+          # **Extrude + orient + add all in one try/except**
         try:
-            # attempt triangle, else fall back
+            # Try multiple extrusion methods in order of preference
+            extruded = None
+            
+            # Method 1: Try triangle engine
             try:
                 extruded = trimesh.creation.extrude_polygon(polygon, height, engine="triangle")
+                if debug: print("   ↳ used triangle engine")
             except (ImportError, ValueError) as e:
-                if debug:
-                    print(f"   ↳ triangle engine error ({e}), falling back to earcut")
-                extruded = trimesh.creation.extrude_polygon(polygon, height, engine="earcut")
+                if debug: print(f"   ↳ triangle engine error ({e})")
             
-            if debug:
-                print(f"   ↳ extruded mesh vertices={len(extruded.vertices)}, faces={len(extruded.faces)}")
+            # Method 2: Try earcut engine
+            if extruded is None:
+                try:
+                    extruded = trimesh.creation.extrude_polygon(polygon, height, engine="earcut")
+                    if debug: print("   ↳ used earcut engine")
+                except (ImportError, ValueError) as e:
+                    if debug: print(f"   ↳ earcut engine error ({e})")
             
-            # orientation fix
-            transform_x = trimesh.transformations.rotation_matrix(np.pi/2, (1, 0, 0))
-            transform_z = trimesh.transformations.rotation_matrix(np.pi, (0, 0, 1))
-            extruded.apply_transform(transform_x)
-            extruded.apply_transform(transform_z)
+            # Method 3: Manual extrusion fallback
+            if extruded is None:
+                if debug: print("   ↳ using manual extrusion fallback")
+                
+                # Get polygon exterior coordinates
+                coords = list(polygon.exterior.coords[:-1])  # Remove duplicate last point
+                
+                # Create bottom vertices
+                bottom_vertices = np.array([[x, y, 0] for x, y in coords])
+                # Create top vertices
+                top_vertices = np.array([[x, y, height] for x, y in coords])
+                  # Combine all vertices
+                vertices = np.vstack([bottom_vertices, top_vertices])
+                
+                # Create faces
+                faces = []
+                n = len(coords)
+                
+                # Triangulate bottom face (reversed for correct normal)
+                if n >= 3:
+                    bottom_triangles = simple_triangulate_polygon(list(range(n)))
+                    for tri in bottom_triangles:
+                        faces.append([tri[2], tri[1], tri[0]])  # Reverse for correct normal
+                
+                # Triangulate top face
+                if n >= 3:
+                    top_triangles = simple_triangulate_polygon(list(range(n)))
+                    for tri in top_triangles:
+                        faces.append([tri[0] + n, tri[1] + n, tri[2] + n])
+                
+                # Side faces
+                for i in range(n):
+                    next_i = (i + 1) % n
+                    # Two triangles per side
+                    faces.append([i, next_i, next_i + n])
+                    faces.append([i, next_i + n, i + n])
+                
+                extruded = trimesh.Trimesh(vertices=vertices, faces=faces)
+                if debug: print("   ↳ manual extrusion successful")
             
-            scene.add_geometry(extruded)
-            if debug: print("   ↳ added to scene")
+            if extruded is not None:
+                if debug:
+                    print(f"   ↳ extruded mesh vertices={len(extruded.vertices)}, faces={len(extruded.faces)}")
+                
+                # orientation fix
+                transform_x = trimesh.transformations.rotation_matrix(np.pi/2, (1, 0, 0))
+                transform_z = trimesh.transformations.rotation_matrix(np.pi, (0, 0, 1))
+                extruded.apply_transform(transform_x)
+                extruded.apply_transform(transform_z)
+                
+                scene.add_geometry(extruded)
+                if debug: print("   ↳ added to scene")
+            else:
+                if debug: print("   ↳ all extrusion methods failed")
         
         except Exception as e:
             if debug: print(f"   ↳ skipping: extrusion/orientation error: {e}")
@@ -410,7 +462,6 @@ app = create_gradio_app()
 # Launch the app
 if __name__ == "__main__":
     app.launch(
-        share=True,  # Creates public link for Hugging Face
         server_name="0.0.0.0",  # Allow external connections
         server_port=7860,  # Standard port for Hugging Face
         show_error=True,