import os
import numpy as np



def read_obj_file_ours(obj_fn, sub_one=False):
  vertices = []
  faces = []
  with open(obj_fn, "r") as rf:
    for line in rf:
      items = line.strip().split(" ")
      if items[0] == 'v':
        cur_verts = items[1:]
        cur_verts = [float(vv) for vv in cur_verts]
        vertices.append(cur_verts)
      elif items[0] == 'f':
        cur_faces = items[1:] # faces
        cur_face_idxes = []
        for cur_f in cur_faces:
          try:
            cur_f_idx = int(cur_f.split("/")[0])
          except:
            cur_f_idx = int(cur_f.split("//")[0])
          cur_face_idxes.append(cur_f_idx if not sub_one else cur_f_idx - 1)
        faces.append(cur_face_idxes)
    rf.close()
  vertices = np.array(vertices, dtype=np.float)
  return vertices, faces