Wasn't it JavaJive who wrote:
> function createDragDirMarker( loc1, anAzim )
> {
> var rAzim = (90 - anAzim)*Math.PI/180;
> var loc2 = new google.maps.LatLng( loc1.lat() +
>markerLength*Math.sin(rAzim), loc1.lng() + markerLength*Math.cos
>(rAzim) );
> createDragLineMarker( loc1, loc2 );
> }
That code would work if degrees of latitude and longitude had the same
length.
You might consider reverse engineering the OpenLayers .rotate() code:
rotate:function(angle,origin){
angle*=Math.PI/180;
var radius=this.distanceTo(origin);
var theta=angle+Math.atan2(this.y-origin.y,this.x-origin.x);
this.x=origin.x+(radius*Math.cos(theta));
this.y=origin.y+(radius*Math.sin(theta));
this.clearBounds();
}
Or you might consider using EOffsetBearing()
see http://econym.org.uk/gmap/eshapes.htm
--
Mike Williams
http://econym.org.uk/gmap
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