Decimate meshes

public/cad/decimate_mesh.py

@@ -0,0 +1,39 @@
+import open3d as o3d
+import shutil
+from pathlib import Path
+
+
+def decimate_mesh(input_path, output_path, target_faces=7500):
+    try:
+        mesh = o3d.io.read_triangle_mesh(str(input_path))
+        if len(mesh.triangles) > target_faces:
+            mesh = mesh.simplify_quadric_decimation(target_faces)
+            o3d.io.write_triangle_mesh(str(output_path), mesh)
+            print(f"Decimated {input_path.name}: {len(mesh.triangles)} faces")
+            return True
+    except Exception as e:
+        print(f"Could not decimate {input_path.name}, copying original: {e}")
+        return False
+    return False
+
+
+def process_folder(folder_path, output_folder):
+    folder_path = Path(folder_path)
+    output_folder = Path(output_folder)
+    output_folder.mkdir(exist_ok=True)
+
+    mesh_files = list(folder_path.glob("*.stl")) + list(folder_path.glob("*.obj"))
+
+    for mesh_path in mesh_files:
+        output_path = output_folder / mesh_path.name
+        if not decimate_mesh(mesh_path, output_path):
+            shutil.copy2(mesh_path, output_path)
+            print(f"Copied original {mesh_path.name}")
+
+
+if __name__ == "__main__":
+    zbot_path = Path("zbot")
+    mesh_folder = zbot_path / "meshes"
+    output_folder = zbot_path / "meshes_decimated"
+
+    process_folder(mesh_folder, output_folder)