Merge pull request #6706 from fredj/cluster_getDistance

Add ol.source.Cluster#getDistance function

src/ol/source/cluster.js

@@ -74,6 +74,16 @@ ol.source.Cluster = function(options) {
 ol.inherits(ol.source.Cluster, ol.source.Vector);
 
 
+/**
+ * Get the distance in pixels between clusters.
+ * @return {number} Distance.
+ * @api
+ */
+ol.source.Cluster.prototype.getDistance = function() {
+  return this.distance_;
+};
+
+
 /**
  * Get a reference to the wrapped source.
  * @return {ol.source.Vector} Source.