content: import os
  import trimesh
  import numpy as np
  import argparse
  import json
  
  from partcrafter_src.utils.data_utils import scene_to_parts, mesh_to_surface, normalize_mesh
  
  if __name__ == '__main__':
      parser = argparse.ArgumentParser()
      parser.add_argument('--input', type=str, default='assets/objects/scissors.glb')
      parser.add_argument('--output', type=str, default='preprocessed_data')
      args = parser.parse_args()
  
      input_path = args.input
      output_path = args.output
  
      assert os.path.exists(input_path), f'{input_path} does not exist'
  
      mesh_name = os.path.basename(input_path).split('.')[0]
      output_path = os.path.join(output_path, mesh_name)
      if not os.path.exists(output_path):
          os.makedirs(output_path)
  
      config = {
          "num_parts": 0, 
      }
  
      # sample points from mesh surface
      mesh = trimesh.load(input_path, process=False)
      mesh = normalize_mesh(mesh)
      config["num_parts"] = len(mesh.geometry)
      if config["num_parts"] > 1 and config["num_parts"] <= 16:
          parts = scene_to_parts(
              mesh,
              return_type="point",
              normalize=False
          )
      else:
          parts = []
      mesh = mesh.to_geometry()
      object = mesh_to_surface(mesh, return_dict=True)
      datas = {
          "object": object,
          "parts": parts,
      }
      # save points
      np.save(os.path.join(output_path, 'points.npy'), datas)
  
      # save config
      with open(os.path.join(output_path, 'num_parts.json'), 'w') as f:
          json.dump(config, f, indent=4)