/// <summary>
        /// Sets the 3D representation of the kinect camera in the 3D representation of the room
        /// </summary>
        /// <param name="devKinect">the representation of the kinect camera of the IGS to get its information of size and
        ///                         and position</param>
        public void SetKinectCamera(DevKinect devKinect)
        {
            Point3D center = new Point3D();


            HelixToolkit.Wpf.BoxVisual3D addKinect = new HelixToolkit.Wpf.BoxVisual3D();
            RotateTransform3D            trans     = new RotateTransform3D();
            AxisAngleRotation3D          rotation  = new AxisAngleRotation3D();

            center.X = devKinect.ball.Center.X;
            center.Y = devKinect.ball.Center.Y;
            center.Z = devKinect.ball.Center.Z;

            addKinect.Center = center;
            addKinect.Length = 0.38;
            addKinect.Width  = 0.156;
            addKinect.Height = 0.123;

            rotation.Axis  = (new Vector3D(0, 1, 0));
            rotation.Angle = devKinect.roomOrientation;

            trans.Rotation      = rotation;
            trans.CenterX       = center.X;
            trans.CenterY       = center.Y;
            trans.CenterZ       = center.Z;
            addKinect.Transform = trans;

            this.kinect = addKinect;
            mainViewport.Children.Remove(kinect);
            mainViewport.Children.Add(kinect);
        }
        /// <summary>
        /// this method intializes the representation of the kinect camera used for positioning and
        /// visualization by reading the information out of the config.xml
        /// </summary>
        public void createIGSKinect()
        {
            float ballRad = 0.4f;

            Point3D kinectCenter    = new Point3D(environmentHandler.getKinectPosX(), environmentHandler.getKinectPosY(), environmentHandler.getKinectPosZ());
            Ball    kinectBall      = new Ball(kinectCenter, ballRad);
            double  roomOrientation = environmentHandler.getKinecHorizontalAngle();
            double  tiltingDegree   = environmentHandler.getKinectTiltAngle();


            IGSKinect = new DevKinect("DevKinect", kinectBall, tiltingDegree, roomOrientation);
        }