Changing icon based on zoom level

Question

How do I go about changing an icon height & width based on the Google Maps zoom level?

I\'m using Google Maps api v3.

Answer 1

This is the code I used eventually:

google.maps.event.addListener(google_map, 'zoom_changed', function() {
    var z = google_map.getZoom();

    _.each(map_shapes, function(s) {

        if (! $.isFunction(s.shape.getPosition)) return;

        var w = s.shape.getIcon().size.width;
        var h = s.shape.getIcon().size.height;

        s.shape.setIcon(new google.maps.MarkerImage(
            s.shape.getIcon().url, null, null, null, new google.maps.Size(
                w - Math.round(w / 3 * (last_zoom - z)),
                h - Math.round(h / 3 * (last_zoom - z)))
            )
        );

    });

    last_zoom = z;
});