Hi everybody, In my project, I currently use the cluster strategy.
In the example http://dev.openlayers.org/sandbox/vector-behavior/examples/strategy-cluster.html we use a little formula in the context to define the radius : Math.min(feature.attributes.count, 7) + 3; Personnally, I am not sure that it is the right way to define the radius size of the cluster. Normally, the radius should be defined by the "max value of all cluster" and the "max radius we autorize"!? Personally, I add a function in the Cluster.js file which is called before the this.layer.addFeatures(clusters) in the cluster function : getBiggestClusterValue: function(clusters) { if (this.maxVal == -1) { if(clusters) { for(var i=0; i<clusters.length; ++i) { if (clusters[i].attributes.count > this.maxVal) this.maxVal = clusters[i].attributes[this.AttributeUsedToCount]; } } return this.maxVal; } else return this.maxVal; }, And in the context, I use this formula to determine the radius var maxClustersValue = parseInt(clusterStrategy.maxVal); var maxRadius = 18; var currentClusterValue = feature.attributes.nbOfSpams; var radius = Math.ceil(currentClusterValue * (maxRadius / maxClustersValue)); return Math.max(2,radius); Is my reflexion correct? Thanks all, Jérome -- View this message in context: http://www.nabble.com/Problem-with-cluster-strategy-tp20701364p20701364.html Sent from the OpenLayers Dev mailing list archive at Nabble.com. _______________________________________________ Dev mailing list Dev@openlayers.org http://openlayers.org/mailman/listinfo/dev
