private void Zero_Click(object sender, RoutedEventArgs e)
 {
     DenavitHartenbergSetting.Joint joint = (DenavitHartenbergSetting.Joint)(sender as Button).Tag;
     joint.X = 0f;
 }
 private void PlusHalf_Click(object sender, RoutedEventArgs e)
 {
     DenavitHartenbergSetting.Joint joint = (DenavitHartenbergSetting.Joint)(sender as Button).Tag;
     joint.X += 0.5f;
 }
 private void Plus90Degrees_Click(object sender, RoutedEventArgs e)
 {
     DenavitHartenbergSetting.Joint joint = (DenavitHartenbergSetting.Joint)(sender as Button).Tag;
     joint.X += (float)(Math.PI / 2);
 }