In this way when you zoom in the map, your features will be huge.
Except that is the behaviour you want to achieve...
cheers
On Thu, Dec 17, 2009 at 11:44 AM, Andreas Hocevar <ahoce...@opengeo.org> wrote:
> Hi,
>
> why so complicated?
>
> Ivan pointed you to the right way to do it. If you look at it, you see a
> context with a getType function. In this function, you can return the
> desired point radius. If you have your radius in map units, just do the
> following:
>
> return radiusInMapUnits / map.getResolution();
>
> Regards,
> Andreas.
>
>
> On 2009-12-17 11:15, Mehmet Sirin wrote:
>> hi, there you have the same problem: point-vectors stays as they are
>> -without stretching/resizing.
>>
>> i just find the solution:
>>
>> function createCircle(lat, lon, radius){
>> polygonLayer.removeFeatures(polygonLayer.features);
>> var style = {
>> fillColor: '#ff0000',
>> strokeWidth: 1,
>> pointRadius: radius, // in map coordinates
>>
>> };
>>
>>
>> var point = new OpenLayers.Geometry.Point(lat, lon);
>> var polygonFeature =
>> OpenLayers.Geometry.Polygon.createRegularPolygon(point,radius,30,0);
>> var feature = new
>> OpenLayers.Feature.Vector(polygonFeature,null, style);
>>
>>
>> polygonLayer.addFeatures([feature]);
>> polygonLayer.setOpacity(0.5);
>>
>>
>> }
>>
>> 2009/12/17 Ivan Grcic <igr...@gmail.com <mailto:igr...@gmail.com>>
>>
>> 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
>> <m.siri...@googlemail.com <mailto:m.siri...@googlemail.com>> 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
>> > Users@openlayers.org <mailto:Users@openlayers.org>
>> > http://openlayers.org/mailman/listinfo/users
>> >
>> >
>>
>>
>>
>> --
>> Ivan Grcic
>>
>>
>>
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>>
>
>
> --
> Andreas Hocevar
> OpenGeo - http://opengeo.org/
> Expert service straight from the developers.
>
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--
Ivan Grcic
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