[OpenLayers-Users] Cluster strategy not working

[Jerome Freyre]

Heidtmare is right and faster than me.... :D

Have a look to http://openlayers.org/dev/examples/strategy-cluster.html to
modify the size of cluster depending of the number of feature they represent



Here is a script that is working. And think that you can 

PS: Sorry for the "double post" I push the wrong button :)

	        var map, wfs;

			var styleMap1 = new OpenLayers.StyleMap({
		        "default": new OpenLayers.Style(
		            {
		                 fillColor: "#0000FF",
		                 strokeColor: "#0000FF",
		                 pointRadius: 6
		            }
		        )
		    });

			function init(){
			                map = new OpenLayers.Map('map');
			                var wms = new OpenLayers.Layer.WMS(
			                    "OpenLayers WMS",
			                    "http://labs.metacarta.com/wms/vmap0?",
			                    {layers: 'basic'}
			                );
			                map.addLayer(wms);
			                map.zoomToMaxExtent();
			
			
							var strat = new OpenLayers.Strategy.Cluster({distance:20});
										vectorLayer = new OpenLayers.Layer.Vector("Vektorlayer",{
										strategies: [
											strat
										],
										styleMap: styleMap1, maxResolution: 19});
										strat.activate();

			map.addLayers([vectorLayer]);
			
			/**
			 * Generate datas // Simulate your data access
			 */
            var dx = 3;
            var dy = 3;
            var px, py;
            featuresToBeClustered = [];
            for(var x=-45; x<=45; x+=dx) {
                for(var y=-22.5; y<=22.5; y+=dy) {
                    px = x + (2 * dx * (Math.random() - 0.5));
                    py = y + (2 * dy * (Math.random() - 0.5));
                    featuresToBeClustered.push({
						'lonlat':new OpenLayers.LonLat(px,py),
						'id':px+'  '+py
					});
                }
            }
			/**
			 * Populate the array of feature
			 */
			var arrayOfFeatures = [];
			for (var i=0; i<featuresToBeClustered.length; i++){
			    arrayOfFeatures.push(generateFeature(vectorLayer,
featuresToBeClustered[i].lonlat, featuresToBeClustered[i].id));
			}
			
			/**
			 * Add all features in one time
			 */ 
			vectorLayer.addFeatures(arrayOfFeatures);
			
			
			
			map.setCenter(new OpenLayers.LonLat(0, 0), 2);
			
		}
		/**
		 * Modification of you function
		 */
		function generateFeature(layer, lonlat, mestId){
		   var geometryObjekt = new
OpenLayers.Geometry.Point(lonlat.lon,lonlat.lat);
		   var vectorObjekt = new OpenLayers.Feature.Vector(geometryObjekt);
		   vectorObjekt.attributes.mest = mestId;
		   return vectorObjekt;
		}




Heidtmare wrote:
> 
> i believe you need to add all your features at once,
> so instead of looping the layer.addFeatures() call
> you need to build all your features into an array and then call
> layer.addFeatures() once.
> 
> 
> 

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