kinect sdk 2.0關節角度和跟蹤

Question

如何檢查您正在訪問的關節是否有被跟蹤的跟蹤狀態。我發現關節的8角，我似乎無法得到的結果顯示我的屏幕上，

public double AngleBetweenTwoVectors(Vector3D vectorA, Vector3D vectorB) 
    { 
     double dotProduct = 0.0; 
     vectorA.Normalize(); 
     vectorB.Normalize(); 


     dotProduct = Vector3D.DotProduct(vectorA, vectorB); 

     return (double)Math.Acos(dotProduct)/Math.PI * 180; 
    } 

    public double[] GetVector(Body skeleton) 
    { 

     Vector3D Shoulder = new Vector3D(skeleton.Joints[JointType.SpineShoulder].Position.X, skeleton.Joints[JointType.SpineShoulder].Position.Y, skeleton.Joints[JointType.SpineShoulder].Position.Z); 
     Vector3D RShoulder = new Vector3D(skeleton.Joints[JointType.ShoulderRight].Position.X, skeleton.Joints[JointType.ShoulderRight].Position.Y, skeleton.Joints[JointType.ShoulderRight].Position.Z); 
     Vector3D LShoulder = new Vector3D(skeleton.Joints[JointType.ShoulderLeft].Position.X, skeleton.Joints[JointType.ShoulderLeft].Position.Y, skeleton.Joints[JointType.ShoulderLeft].Position.Z); 
     Vector3D RElbow = new Vector3D(skeleton.Joints[JointType.ElbowRight].Position.X, skeleton.Joints[JointType.ElbowRight].Position.Y, skeleton.Joints[JointType.ElbowRight].Position.Z); 
     Vector3D LElbow = new Vector3D(skeleton.Joints[JointType.ElbowLeft].Position.X, skeleton.Joints[JointType.ElbowLeft].Position.Y, skeleton.Joints[JointType.ElbowLeft].Position.Z); 
     Vector3D RWrist = new Vector3D(skeleton.Joints[JointType.WristRight].Position.X, skeleton.Joints[JointType.WristRight].Position.Y, skeleton.Joints[JointType.WristRight].Position.Z); 
     Vector3D LWrist = new Vector3D(skeleton.Joints[JointType.WristLeft].Position.X, skeleton.Joints[JointType.WristLeft].Position.Y, skeleton.Joints[JointType.WristLeft].Position.Z); 
     Vector3D RKnee = new Vector3D(skeleton.Joints[JointType.KneeRight].Position.X, skeleton.Joints[JointType.KneeRight].Position.Y, skeleton.Joints[JointType.KneeRight].Position.Z); 
     Vector3D LKnee = new Vector3D(skeleton.Joints[JointType.KneeLeft].Position.X, skeleton.Joints[JointType.KneeLeft].Position.Y, skeleton.Joints[JointType.KneeLeft].Position.Z); 
     Vector3D RAnkle = new Vector3D(skeleton.Joints[JointType.AnkleRight].Position.X, skeleton.Joints[JointType.AnkleRight].Position.Y, skeleton.Joints[JointType.AnkleRight].Position.Z); 
     Vector3D LAnkle = new Vector3D(skeleton.Joints[JointType.AnkleLeft].Position.X, skeleton.Joints[JointType.AnkleLeft].Position.Y, skeleton.Joints[JointType.AnkleLeft].Position.Z); 
     Vector3D Hip = new Vector3D(skeleton.Joints[JointType.SpineBase].Position.X, skeleton.Joints[JointType.SpineBase].Position.Y, skeleton.Joints[JointType.SpineBase].Position.Z); 
     Vector3D RHip = new Vector3D(skeleton.Joints[JointType.HipRight].Position.X, skeleton.Joints[JointType.HipRight].Position.Y, skeleton.Joints[JointType.HipRight].Position.Z); 
     Vector3D LHip = new Vector3D(skeleton.Joints[JointType.HipLeft].Position.X, skeleton.Joints[JointType.HipLeft].Position.Y, skeleton.Joints[JointType.HipLeft].Position.Z); 


     double AngleRElbow = AngleBetweenTwoVectors(RElbow - RShoulder, RElbow - RWrist); 
     double AngleRShoulder = AngleBetweenTwoVectors(RShoulder - Shoulder, RShoulder - RElbow); 
     double AngleLElbow = AngleBetweenTwoVectors(LElbow - LShoulder, LElbow - LWrist); 
     double AngleLShoulder = AngleBetweenTwoVectors(LShoulder - Shoulder, LShoulder - LElbow); 
     double AngleRKnee = AngleBetweenTwoVectors(RKnee - RHip, RKnee - RAnkle); 
     double AngleLKnee = AngleBetweenTwoVectors(LKnee - LHip, LKnee - LAnkle); 
     double AngleRHip = AngleBetweenTwoVectors(RHip - Hip, RHip - RKnee); 
     double AngleLHip = AngleBetweenTwoVectors(LHip - Hip, LHip - LKnee); 


     Results.Add(AngleLShoulder); 
     Results.Add(AngleLElbow); 
     Results.Add(AngleLKnee); 
     Results.Add(AngleLHip); 
     Results.Add(AngleRShoulder); 
     Results.Add(AngleRElbow); 
     Results.Add(AngleRKnee); 
     Results.Add(AngleRHip); 

     double[] resultsArray = Results.ToArray(); 

     return resultsArray; 

    } 

    private void Button_Click(object sender, RoutedEventArgs e) 
    { 
     result1.Text = Results[4].ToString(); 
     result2.Text = Results[5].ToString(); 
     result3.Text = Results[6].ToString(); 
     result4.Text = Results[7].ToString(); 
     result5.Text = Results[0].ToString(); 
     result6.Text = Results[1].ToString(); 
     result7.Text = Results[2].ToString(); 
     result8.Text = Results[3].ToString(); 
    } 

有來自Kinect的來到節目現場的飼料，但是當按鈕被按下，出於某種原因拋出空指針異常。我想這是因爲我不確定關節是否被跟蹤。我該如何去做呢？

也是我的代碼顯示角度正確嗎？我爲每個結果使用了文本框。

Answer 1

foreach (Joint joint in skeleton.Joints) 
      { 
       if (joint.TrackingState == JointTrackingState.Tracked) 
       { 
        //Do something      
       } 
       else if (joint.TrackingState == JointTrackingState.Inferred) 
       { 
        //Do something else     
       } 
      } 

此遍歷節點陣列，並檢查每個關節如果JointTrackingState是Tracked，Inferred或NotTracked，見here。計算角度的程序非常好。

如果您有更多關於如何計算接頭角度的問題，請參閱here。

如果你想要一個工作程序，我會通過電子郵件發送給你。或者參見here。希望這有助於:)