[OpenLayers-Users] Show polygon vectors as points

[acangi]

OK, I was able to see the marker locally also. 
To do it, I modified the function
OpenLayers.Renderer.Elements.drawGeometry(geometry, style, featureId) :

...
if (style.display != "none") {
  if (!style.strokeColor  && !style.fillColor  && (geometry.CLASS_NAME  !=
"OpenLayers.Geometry.Point"  )) {
    var centerLonLat =  geometry.getBounds().getCenterLonLat();
    geometry = new OpenLayers.Geometry.Point(centerLonLat.lon,
centerLonLat.lat);
  }
...

The code is taken from
http://trac.openlayers.org/browser/sandbox/topp/almanac/lib/OpenLayers/Renderer/Elements.js?rev=6996

Now I'd prefer to override the method instead of writing in OL's code. I'm
trying with 

OpenLayers.Renderer.Elements.prototype.drawGeometry = function(geometry,
style, featureId) {
... complete code of the function, including the modification...
}

but the override isn't taken into account : the result depends on what is
written in the base class. Any clue why my override isn't working ?
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