/// <summary>
        /// Use this overload for placing points for roads and boundaries 
        /// </summary>
        /// <param name="worldEditor"></param>
        /// <param name="displayObject"></param>
        /// <param name="validate"></param>
        /// <param name="complete"></param>
        public MultiPointPlacementHelper(WorldEditor worldEditor, DisplayObject displayObject, MultiPointValidate validate, MultiPointComplete complete)
        {
            app = worldEditor;
            dragObject = displayObject;
            completeCallback = complete;
            validateCallback = validate;

            points = new List<Vector3>();

            dragHelper = new DragHelper(app, dragObject, new DragComplete(DragCallback));
        }
        /// <summary>
        /// Use this overload to place multiple Static Objects.  It allows the static objects placed to be placed on other objects.
        /// </summary>
        /// <param name="worldEditor"></param>
        /// <param name="displayObject"></param>
        /// <param name="validate"></param>
        /// <param name="complete"></param>
        public MultiPointPlacementHelper(WorldEditor worldEditor, MultiPointValidate validate, DisplayObject displayObject, MultiPointComplete complete)
        {
            app              = worldEditor;
            dragObject       = displayObject;
            completeCallback = complete;
            validateCallback = validate;

            points = new List <Vector3>();


            dragHelper = new DragHelper(app, new DragComplete(DragCallback), dragObject);
        }