private void StartTraceableMode()
        {
            SetUIInTrackingMode();

            //ExerciseVideo.Play();

            _sensor = KinectSensor.GetDefault();
            
            //todo - check, not working
            if (_sensor != null)
            {
                _sensor.Open();

                // 2) Initialize the background removal tool.
                _backgroundRemovalTool = new BackgroundRemovalTool(_sensor.CoordinateMapper);
                _drawSkeleton = new DrawSkeleton(_sensor, (int)(KinectSkeleton.Width), (int)(KinectSkeleton.Height));

                _reader = _sensor.OpenMultiSourceFrameReader(FrameSourceTypes.Color | FrameSourceTypes.Depth | FrameSourceTypes.BodyIndex | FrameSourceTypes.Body);
                _reader.MultiSourceFrameArrived += Reader_MultiSourceFrameArrived;
                
                //Gesture detection
                Exercise tempExercise = CurrentExercise;

                _gestureAnalysis = new GestureAnalysis(ref tempExercise);
                _gestureDetector = new GestureDetector(_sensor, _gestureAnalysis, CurrentExercise);

                _gestureAnalysis.startGestureDeteced += _gestureAnalysis_startGestureDeteced;

                CurrentExercise.CreateRounds();

                //_timer.Start();
            }

            ExerciseVideo.Play();
            inPlayMode = true;
        }
        private void StartNonTraceableMode()
        {
            SetUIInNoTrackableMode();

            _sensor = KinectSensor.GetDefault();

            //todo - check, not working
            if (_sensor != null)
            {
                _sensor.Open();

                // 2) Initialize the background removal tool.
                _backgroundRemovalTool = new BackgroundRemovalTool(_sensor.CoordinateMapper);
                _drawSkeleton = new DrawSkeleton(_sensor, (int)(KinectSkeleton.Width), (int)(KinectSkeleton.Height));

                _reader = _sensor.OpenMultiSourceFrameReader(FrameSourceTypes.Color | FrameSourceTypes.Depth | FrameSourceTypes.BodyIndex | FrameSourceTypes.Body);
                _reader.MultiSourceFrameArrived += Reader_MultiSourceFrameArrived_NonTraceable;

            }
        }