How to make SkeletonFrames avaible in my click event?

Question

I want my SkeletonFrames avaible in my click event. Is there anyway to make it possible?

I was planning to create a Kinect to place image on skeleton joints. Here's my coding.

private void button1_Click(object sender, RoutedEventArgs e)
{
    foreach (SkeletonData data in e.SkeletonFrame.Skeletons)
    {
        foreach (Joint joint in data.Joints)
        {
            if (joint.Position.W < 0.6f) return;
            switch (joint.ID)
            {
                case JointID.Head:
                    var heanp = getDisplayPosition(joint);

                    Canvas.SetLeft(imgHead, heanp.X);
                    Canvas.SetTop(imgHead, heanp.Y);
                    break;
            }
        }
    }
}

If there's any mistakes, please do correct me.

Answer 1

You could capture the SkeletonFrameReady event and save the last captured skeleton to a global variable, which you can access from your button click event.

For example:

private Skeleton[] skeletons = new Skeleton[0];

private void SensorSkeletonFrameReady(object sender, SkeletonFrameReadyEventArgs e)
{
    Skeleton[] skeletons = new Skeleton[0];

    using (SkeletonFrame skeletonFrame = e.OpenSkeletonFrame())
    {
        if (skeletonFrame != null)
        {
            skeletons = new Skeleton[skeletonFrame.SkeletonArrayLength];
            skeletonFrame.CopySkeletonDataTo(skeletons);
        }
    }
}

Now you have an array (skeletons) of the last SkeletonFrameReady event.

Based on comments made below, you need to upgrade to v1.6 of the SDK and go through the examples provided by Microsoft. Although they may not do exactly what you are wanting for your immediate project they will teach you the basic fundamentals of working with the Microsoft Kinect for Windows, and give you an understanding of how to work with the sensor.

The example you most want to look at, for your immediate situation, is the SkeletonBasics-WPF example. This will show you how to track the skeleton and pull data from it. It also shows you exactly how draw items onto, and between, the tracked points.

For your situation the most relevant piece is the DrawBonesAndJoints function:

private void DrawBonesAndJoints(Skeleton skeleton, DrawingContext drawingContext)
{
    // Render Torso
    this.DrawBone(skeleton, drawingContext, JointType.Head, JointType.ShoulderCenter);
    this.DrawBone(skeleton, drawingContext, JointType.ShoulderCenter, JointType.ShoulderLeft);
    this.DrawBone(skeleton, drawingContext, JointType.ShoulderCenter, JointType.ShoulderRight);
    this.DrawBone(skeleton, drawingContext, JointType.ShoulderCenter, JointType.Spine);
    this.DrawBone(skeleton, drawingContext, JointType.Spine, JointType.HipCenter);
    this.DrawBone(skeleton, drawingContext, JointType.HipCenter, JointType.HipLeft);
    this.DrawBone(skeleton, drawingContext, JointType.HipCenter, JointType.HipRight);

    // Left Arm
    this.DrawBone(skeleton, drawingContext, JointType.ShoulderLeft, JointType.ElbowLeft);
    this.DrawBone(skeleton, drawingContext, JointType.ElbowLeft, JointType.WristLeft);
    this.DrawBone(skeleton, drawingContext, JointType.WristLeft, JointType.HandLeft);

    // Right Arm
    this.DrawBone(skeleton, drawingContext, JointType.ShoulderRight, JointType.ElbowRight);
    this.DrawBone(skeleton, drawingContext, JointType.ElbowRight, JointType.WristRight);
    this.DrawBone(skeleton, drawingContext, JointType.WristRight, JointType.HandRight);

    // Left Leg
    this.DrawBone(skeleton, drawingContext, JointType.HipLeft, JointType.KneeLeft);
    this.DrawBone(skeleton, drawingContext, JointType.KneeLeft, JointType.AnkleLeft);
    this.DrawBone(skeleton, drawingContext, JointType.AnkleLeft, JointType.FootLeft);

    // Right Leg
    this.DrawBone(skeleton, drawingContext, JointType.HipRight, JointType.KneeRight);
    this.DrawBone(skeleton, drawingContext, JointType.KneeRight, JointType.AnkleRight);
    this.DrawBone(skeleton, drawingContext, JointType.AnkleRight, JointType.FootRight);

    // Render Joints
    foreach (Joint joint in skeleton.Joints)
    {
        Brush drawBrush = null;

        if (joint.TrackingState == JointTrackingState.Tracked)
        {
            drawBrush = this.trackedJointBrush;                    
        }
        else if (joint.TrackingState == JointTrackingState.Inferred)
        {
            drawBrush = this.inferredJointBrush;                    
        }

        if (drawBrush != null)
        {
            drawingContext.DrawEllipse(drawBrush, null, this.SkeletonPointToScreen(joint.Position), JointThickness, JointThickness);
        }
    }
}

Because you don't care about bones, you can remove the function calls that draw them:

private void DrawBonesAndJoints(Skeleton skeleton, DrawingContext drawingContext)
{
    // Render Joints
    foreach (Joint joint in skeleton.Joints)
    {
        Brush drawBrush = null;

        if (joint.TrackingState == JointTrackingState.Tracked)
        {
            drawBrush = this.trackedJointBrush;                    
        }
        else if (joint.TrackingState == JointTrackingState.Inferred)
        {
            drawBrush = this.inferredJointBrush;                    
        }

        if (drawBrush != null)
        {
            drawingContext.DrawEllipse(drawBrush, null, this.SkeletonPointToScreen(joint.Position), JointThickness, JointThickness);
        }
    }
}

Now you have a program that will draw dots on all the joints. If all you want are the hands...

private void DrawBonesAndJoints(Skeleton skeleton, DrawingContext drawingContext)
{
    drawingContext.DrawEllipse(trackedJointBrush, null, SkeletonPointToScreen(skeleton.Joints[JointType.HandLeft].Position), JointThickness, JointThickness);
    drawingContext.DrawEllipse(trackedJointBrush, null, SkeletonPointToScreen(skeleton.Joints[JointType.HandRight].Position), JointThickness, JointThickness);
}

You'll have two little dots following your hands around now.