title: OpenLayers 3: How to calculate distance between 2 points?
body: <p>Using OpenLayers 3, how can I determine the distance between two points in the Spherical Mercator (SRID: 3857) projection?</p>
  
  <p>I know that <code>distanceTo</code> was used in OpenLayers 2</p>
  
  <pre><code>point1.distanceTo(point2)
  </code></pre>
  
  <p>I looked through the <a href="http://openlayers.org/en/v3.0.0/apidoc/ol.geom.Point.html">OpenLayers 3 docs</a>, but I'm not finding anything similar...</p>