Example Function for getting the Screen Position. This is directly from the Flixel Code Base.

FlixelExample.hx

	/**
	 * Call this function to figure out the on-screen position of the object.
	 *
	 * @param   Point    Takes a `FlxPoint` object and assigns the post-scrolled X and Y values of this object to it.
	 * @param   Camera   Specify which game camera you want.
	 *                   If `null`, it will just grab the first global camera.
	 * @return  The Point you passed in, or a new Point if you didn't pass one,
	 *          containing the screen X and Y position of this object.
	 */
	public function getScreenPosition(?point:FlxPoint, ?Camera:FlxCamera):FlxPoint
	{
		if (point == null)
			point = FlxPoint.get();

		if (Camera == null)
			Camera = FlxG.camera;

		point.set(x, y);
		if (pixelPerfectPosition)
			point.floor();

		return point.subtract(Camera.scroll.x * scrollFactor.x, Camera.scroll.y * scrollFactor.y);
	}