title: why choose 1024 for when random point generation in PCL application
body: <p>I have noticed in most of the PCl example, they choose 1024 for random point generation. Is there a special reason for choosing 1024 ?    </p>
  
  <pre><code>cloud-&gt;points[i].x = 1024 * rand () / (RAND_MAX + 1.0f);
  cloud-&gt;points[i].y = 1024 * rand () / (RAND_MAX + 1.0f);
  cloud-&gt;points[i].z = 1024 * rand () / (RAND_MAX + 1.0f);
  </code></pre>