title: Distance between anchors
body: <p>I set 2 anchors. The distance calculated between the 2 anchors is pretty much accurate.
  Translating those anchors pose to screen points (worldToScreenPoint), the distance calculated using the 2D (x,y) points  greater by 8 cm.</p>
  
  <p>Am I missing something?</p>
  
  <pre><code>  Vector3  vecCoord;
    Pose     pose;
  
    for (int nIndex = 0; nIndex &lt; nItems; nIndex++)
    {
     pose = listAnchors.get(nIndex).getPose();
  
     m_vecPose.x = pose.tx();
     m_vecPose.y = pose.ty();
     m_vecPose.z = pose.tz();
  
     vecCoord = camera.worldToScreenPoint(m_vecArcorePose);
    }
  </code></pre>
  
  <p>listAnchors contains captured anchors.<br>
  Calculating distance between 2 poses (e.g. <code>listAnchors.get(nIndex).getPose()</code> and <code>listAnchors.get(nIndex+1).getPose()</code>) comes out accurate.
  Calculating the distance between those anchors screen points (received in vecCoord) is not accurate.</p>