title: Convert a pointcloud from .txt to .ply
body: <p>I am new to Pointcloud (LiDAR) processing and I was wondering if there is any tool/library able to convert a pointcloud saved in .txt to a .ply file.</p>
  <p>The pointcloud .txt looks like this</p>
  <pre><code>pointcloud_width pointcloud_height
  point1_x point1_y point1_z point1_intensity
  point2_x point2_y point2_z point2_intensity
  ...
  pointN_x pointN_y pointN_z pointN_intensity
  </code></pre>
  <p>Thanks for your help</p>