[OpenLayers-Users] createRegularPolygon ignores map units

[jas_gao]

this question has been asked before, but no answer available.  so here it is again,

the unit defined in map is 'km', however not matters what unit I chaged to the map the function createRegularPolygon always create a very tiny circle around the selected feature. the code is 

// slider is a ext js componnet, slider.getValue returns exact what i what, so here is no problems i assume
   tempvec = new OpenLayers.Layer.Vector("buffer");
   bufferCircle =  OpenLayers.Geometry.Polygon.createRegularPolygon(window.selectedFeature.geometry, parseFloat(slider.getValue()),40);
   buffer = new OpenLayers.Feature.Vector(bufferCircle);

   tempvec.addFeatures([buffer]);

Thanks in advance!!
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