title: How to interactively Draw a Circle in openlayers-3
body: <p>I'am intersted in a fuctionality, that was present in openlayers-2, but absent at the moment in 3rd installment - interactive circle drawing.</p>
  
  <p>As you can see in example here: <a href="http://openlayers.org/en/v3.0.0/examples/draw-and-modify-features.html" rel="nofollow">http://openlayers.org/en/v3.0.0/examples/draw-and-modify-features.html</a></p>
  
  <p>There's no available option for Circle. Even though comment states, that there should be available all of @type {ol.geom.GeometryType}, circle dowsen't work. Tried it myself with this piece of code:</p>
  
  <pre><code>function addInteraction(type) {
      draw = new ol.interaction.Draw({
          features: featureOverlay.getFeatures(),
          type: /** @type {ol.geom.GeometryType} */ 'Circle'
      });
      map.addInteraction(draw);
  }
  </code></pre>
  
  <p>Is there any native\patch\hack solutions present?</p>