Comments

Wow! It`s awesome!

@kendrick0772: Maybe You can get a inspration in here. Check this out.

http://social.msdn.microsoft.com/forums/en-US/wpf/thread/f2dbc76e-dd54-4be6-b7d8-a72b1f1296ac/

@Blas: I think ScaleTo() is the built-in function of the joint.After you uncomment the line 180, you should comment the CameraPosition() (line 118~121),then you can get a right answer. Maybe CameraPosition() has a high priority than ScaledPosition(), I think..

@Blas: Maybe I think, You should check the GetCameraPoint() method. To scale the position of skeleton, CameraPosition() method must be commented. And After you uncomment the ScaledPosition() method in sensor_AllFrameReady event, You can get a right result!

I solve the problem. Thanks for your help!

@Dan:Definitely. Can you explain why this happens? I can`t find the reason.. Thanks!  

@Dan:Hmm. That`s strange. I didn`t modifiy the sample code. I re-downloaded it, but the same problem occured in that situation.Joint Information is right,but scaledjoint is still incorrect..

anyways. here is the code.

bool closing = false;
        const int skeletonCount = 6; 
        Skeleton[] allSkeletons = new Skeleton[skeletonCount];

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            kinectSensorChooser1.KinectSensorChanged += new DependencyPropertyChangedEventHandler(kinectSensorChooser1_KinectSensorChanged);

        }

        void kinectSensorChooser1_KinectSensorChanged(object sender, DependencyPropertyChangedEventArgs e)
        {
            KinectSensor old = (KinectSensor)e.OldValue;

            StopKinect(old);

            KinectSensor sensor = (KinectSensor)e.NewValue;

            if (sensor == null)
            {
                return;
            }

            


            var parameters = new TransformSmoothParameters
            {
                Smoothing = 0.3f,
                Correction = 0.0f,
                Prediction = 0.0f,
                JitterRadius = 1.0f,
                MaxDeviationRadius = 0.5f
            };
            sensor.SkeletonStream.Enable(parameters);

            sensor.SkeletonStream.Enable();

            sensor.AllFramesReady += new EventHandler<AllFramesReadyEventArgs>(sensor_AllFramesReady);
            sensor.DepthStream.Enable(DepthImageFormat.Resolution640x480Fps30); 
            sensor.ColorStream.Enable(ColorImageFormat.RgbResolution640x480Fps30);

            try
            {
                sensor.Start();
            }
            catch (System.IO.IOException)
            {
                kinectSensorChooser1.AppConflictOccurred();
            }
        }

        void sensor_AllFramesReady(object sender, AllFramesReadyEventArgs e)
        {
            if (closing)
            {
                return;
            }

            //Get a skeleton
            Skeleton first =  GetFirstSkeleton(e);

            if (first == null)
            {
                return; 
            }



            //set scaled position
            //ScalePosition(headImage, first.Joints[JointType.Head]);
            ScalePosition(leftEllipse, first.Joints[JointType.HandLeft]);
            ScalePosition(rightEllipse, first.Joints[JointType.HandRight]);

            GetCameraPoint(first, e); 

        }

        void GetCameraPoint(Skeleton first, AllFramesReadyEventArgs e)
        {

            using (DepthImageFrame depth = e.OpenDepthImageFrame())
            {
                if (depth == null ||
                    kinectSensorChooser1.Kinect == null)
                {
                    return;
                }
                

                //Map a joint location to a point on the depth map
                //head
                DepthImagePoint headDepthPoint =
                    depth.MapFromSkeletonPoint(first.Joints[JointType.Head].Position);
                //left hand
                DepthImagePoint leftDepthPoint =
                    depth.MapFromSkeletonPoint(first.Joints[JointType.HandLeft].Position);
                //right hand
                DepthImagePoint rightDepthPoint =
                    depth.MapFromSkeletonPoint(first.Joints[JointType.HandRight].Position);


                //Map a depth point to a point on the color image
                //head
                ColorImagePoint headColorPoint =
                    depth.MapToColorImagePoint(headDepthPoint.X, headDepthPoint.Y,
                    ColorImageFormat.RgbResolution640x480Fps30);
                //left hand
                ColorImagePoint leftColorPoint =
                    depth.MapToColorImagePoint(leftDepthPoint.X, leftDepthPoint.Y,
                    ColorImageFormat.RgbResolution640x480Fps30);
                //right hand
                ColorImagePoint rightColorPoint =
                    depth.MapToColorImagePoint(rightDepthPoint.X, rightDepthPoint.Y,
                    ColorImageFormat.RgbResolution640x480Fps30);


                //Set location
                CameraPosition(headImage, headColorPoint);
                CameraPosition(leftEllipse, leftColorPoint);
                CameraPosition(rightEllipse, rightColorPoint);
            }        
        }


        Skeleton GetFirstSkeleton(AllFramesReadyEventArgs e)
        {
            using (SkeletonFrame skeletonFrameData = e.OpenSkeletonFrame())
            {
                if (skeletonFrameData == null)
                {
                    return null; 
                }

                
                skeletonFrameData.CopySkeletonDataTo(allSkeletons);

                //get the first tracked skeleton
                Skeleton first = (from s in allSkeletons
                                         where s.TrackingState == SkeletonTrackingState.Tracked
                                         select s).FirstOrDefault();

                return first;

            }
        }

        private void StopKinect(KinectSensor sensor)
        {
            if (sensor != null)
            {
                if (sensor.IsRunning)
                {
                    //stop sensor 
                    sensor.Stop();

                    //stop audio if not null
                    if (sensor.AudioSource != null)
                    {
                        sensor.AudioSource.Stop();
                    }


                }
            }
        }

        private void CameraPosition(FrameworkElement element, ColorImagePoint point)
        {
            //Divide by 2 for width and height so point is right in the middle 
            // instead of in top/left corner
            Canvas.SetLeft(element, point.X - element.Width / 2);
            Canvas.SetTop(element, point.Y - element.Height / 2);

        }

        private void ScalePosition(FrameworkElement element, Joint joint)
        {
            //convert the value to X/Y
            Joint scaledJoint = joint.ScaleTo(1280, 720); 
            
            //convert & scale (.3 = means 1/3 of joint distance)
            //Joint scaledJoint = joint.ScaleTo(1280, 720, .3f, .3f);

            Canvas.SetLeft(element, scaledJoint.Position.X);
            Canvas.SetTop(element, scaledJoint.Position.Y); 
            
        }


        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            closing = true; 
            StopKinect(kinectSensorChooser1.Kinect); 
        }

only one that I modifiy is ScaledPosition Section.

Thanks for your help!

Hi! I have a question. In that sample code, scaledPosition method is not working.When I take a breakpoint at

Joint scaledJoint = joint.ScaleTo(1280, 720); 

in debug mode, scaledJointType is a HipCenter, not what I want. And trackingState fixed to 'NotTracked' mode.I don`t know what I have to do.please help. Thanks.

@Dan:Wow! It worked. Thanks a lot! I appreciate that.

@Dan: Thanks for replying.But still not working... I found the difference between the sample and mine is

using Coding4Fun.Kinect.Wpf; and if(sensor.IsRunning){} section.

Of course, the execution is fine. but when I unplug this(I try the way both usb cable and power adapter), NullreferenceException Ploblem is occured. Oh, and I got something to ask you. Is the usb cable using the main powerline of Xbox Kinect? I unplugged the usb cable, The Kinect`s power turned off and VS2010 got the error. 

Anyways, I`ll try it as possible as i can. Thanks!