Hi, cant you make something like this: http://openlayers.org/dev/examples/styles-context.html
On Thu, Dec 17, 2009 at 10:34 AM, Mehmet Sirin <[email protected]> wrote: > hi, > since there isn't a buffer function integrated in openlayers i have to find > other ways to simulate buffering a point and displaying it: > > function pointBuffer(lat, lon, radius,color){ > polygonLayer.removeFeatures(polygonLayer.features); > var style = { > fillColor: '#ff0000', > strokeWidth: 1, > pointRadius: radius, // in pixels > > }; > > > var point = new OpenLayers.Geometry.Point(lat, lon); > var feature = new OpenLayers.Feature.Vector(point,null, > style); > > polygonLayer.addFeatures([feature]); > polygonLayer.setOpacity(0.5); > > } > > --------------------------------------------------------------------------------------------------------------- > ... > var lonlat1=new > OpenLayers.LonLat(parseInt(radius),0); > var lonlat2=new > OpenLayers.LonLat(parseInt(radius*2),0); > var > pixel1=map.getLayerPxFromLonLat(lonlat1); > var > pixel2=map.getLayerPxFromLonLat(lonlat2); > > > var dist= > Math.abs(parseInt(pixel2.x)-parseInt(pixel1.x)); > > > createCircle(x,y,dist); > > -------------------------------------------------------------------------------------------------------------- > It works fine, but now the problem: > When zooming in or out the point feature won't resize -that means it does > not changes. the pixel size/radius is the same in every zoom level. > for solving this, i thought of creating a linearring and then a polygon, of > which i know that will automatically resize with zooming. > i tried: > var linearRing = new OpenLayers.Geometry.LinearRing(point); //just one point > var polygonFeature = new OpenLayers.Feature.Vector( > new OpenLayers.Geometry.Polygon([linearRing]),null, style); > but seems not to work.. > > > anybody can help? > > regards > m.sirin > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users > > -- Ivan Grcic _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
