title: visualize the point cloud .obj file
body: <p>I have the error when visualizing the point cloud by using open3d.</p>
  <p>My code is</p>
  <p>import numpy as np
  import open3d as o3d</p>
  <p>if <strong>name</strong> == &quot;<strong>main</strong>&quot;:</p>
  <pre><code>print(&quot;Load a ply point cloud, print it, and render it&quot;)
  pcd = o3d.io.read_point_cloud(r&quot;D:\1. PSM 2020\TRY\ayuu\pointnet-master\Area_6_conferenceRoom_1_pred.obj&quot;)
  print(pcd)
  print(np.asarray(pcd.points))
  o3d.visualization.draw_geometries([pcd])
  </code></pre>
  <p>And the error said that my file do not have point cloud</p>
  <p>runfile('D:/1. PSM 2020/TRY/ayuu/pointnet-master/sem_seg/TRY2.py', wdir='D:/1. PSM 2020/TRY/ayuu/pointnet-master/sem_seg')
  Load a ply point cloud, print it, and render it
  [Open3D WARNING] Read geometry::PointCloud failed: unknown file extension for D:\1. PSM 2020\TRY\ayuu\pointnet-master\Area_6_conferenceRoom_1_pred.obj (format: auto).
  PointCloud with 0 points.
  []</p>
  <p>But, if I visualize the point cloud using online 3d viewer, it will show the result.</p>
  <p><a href="https://i.stack.imgur.com/KWmHN.png" rel="nofollow noreferrer">enter image description here</a></p>