1、主要涉及类：

OpenLayers.Layer.Vector、OpenLayers.Control.DrawFeature、 

OpenLayers.Handler.RegularPolygon

2、方法编写

var polygonControl ;function addPolygonLayer(){  var polygonLayer = new OpenLayers.Layer.Vector("Polygon Layer");   map.addLayers([polygonLayer]);   polyOptions = {sides: 4};   polygonControl = new OpenLayers.Control.DrawFeature(polygonLayer,              OpenLayers.Handler.RegularPolygon,{handlerOptions: polyOptions});                map.addControl(polygonControl);                map.setCenter(new OpenLayers.LonLat(0, 0), 3);                    document.getElementById('activate').checked = true;        document.getElementById('deactivate').checked = false;   }     function setOptions(options) {            polygonControl.handler.setOptions(options);     }

  3、操作选项：

deactivateactivate       triangle      square      pentagon      hexagon      circle