ArcMapAddinDistanceAndDirection.ViewModels.LinesViewModel.UpdateFeedback C# (CSharp) Метод

        private void UpdateFeedback()
        {
            // for now lets stick with only updating feedback here with Bearing and Distance case
            if (LineFromType != LineFromTypes.BearingAndDistance)
                return;

            if(Point1 != null && HasPoint1)
            {
                if(feedback == null)
                {
                    var mxdoc = ArcMap.Application.Document as IMxDocument;
                    CreateFeedback(Point1, mxdoc.FocusMap as IActiveView);
                    feedback.Start(Point1);
                }

                // now get second point from distance and bearing
                var construct = new Polyline() as IConstructGeodetic;
                if (construct == null)
                    return;

                construct.ConstructGeodeticLineFromDistance(GetEsriGeodeticType(), Point1, GetLinearUnit(), Distance, GetAzimuthAsDegrees(), esriCurveDensifyMethod.esriCurveDensifyByDeviation, -1.0);

                var line = construct as IPolyline;

                if (line.ToPoint != null)
                {
                    FeedbackMoveTo(line.ToPoint);
                    Point2 = line.ToPoint;
                }
            }
        }