Example sources in the examples dir

examples/cluster.js

@@ -0,0 +1,80 @@
+goog.require('ol.Feature');
+goog.require('ol.Map');
+goog.require('ol.View');
+goog.require('ol.geom.Point');
+goog.require('ol.layer.Tile');
+goog.require('ol.layer.Vector');
+goog.require('ol.source.Cluster');
+goog.require('ol.source.MapQuest');
+goog.require('ol.source.Vector');
+goog.require('ol.style.Circle');
+goog.require('ol.style.Fill');
+goog.require('ol.style.Stroke');
+goog.require('ol.style.Style');
+goog.require('ol.style.Text');
+
+
+var count = 20000;
+var features = new Array(count);
+var e = 4500000;
+for (var i = 0; i < count; ++i) {
+  var coordinates = [2 * e * Math.random() - e, 2 * e * Math.random() - e];
+  features[i] = new ol.Feature(new ol.geom.Point(coordinates));
+}
+
+var source = new ol.source.Vector({
+  features: features
+});
+
+var clusterSource = new ol.source.Cluster({
+  distance: 40,
+  source: source
+});
+
+var styleCache = {};
+var clusters = new ol.layer.Vector({
+  source: clusterSource,
+  style: function(feature, resolution) {
+    var size = feature.get('features').length;
+    var style = styleCache[size];
+    if (!style) {
+      style = [new ol.style.Style({
+        image: new ol.style.Circle({
+          radius: 10,
+          stroke: new ol.style.Stroke({
+            color: '#fff'
+          }),
+          fill: new ol.style.Fill({
+            color: '#3399CC'
+          })
+        }),
+        text: new ol.style.Text({
+          text: size.toString(),
+          fill: new ol.style.Fill({
+            color: '#fff'
+          })
+        })
+      })];
+      styleCache[size] = style;
+    }
+    return style;
+  }
+});
+
+var raster = new ol.layer.Tile({
+  source: new ol.source.MapQuest({layer: 'sat'})
+});
+
+var raw = new ol.layer.Vector({
+  source: source
+});
+
+var map = new ol.Map({
+  layers: [raster, clusters],
+  renderer: 'canvas',
+  target: 'map',
+  view: new ol.View({
+    center: [0, 0],
+    zoom: 2
+  })
+});