title: Change SCNNode position without changing orientation
body: <p>I am using SceneKit and have an app with multiple SCNNodes and when the user taps one, it will follow their finger (using a UILongPressGestureRecognizer). In the state began and changed, I am using the following line of code to change the node's position:</p>
  
  <pre><code>_currentlyMoving?.position = SCNVector3Make(worldPoint.x, worldPoint.y, worldPoint.z)
  </code></pre>
  
  <p>In this line, <code>_currentlyMoving</code> is the SCNNode, and worldPoint the position of my finger.</p>
  
  <p>This is moving the node to the correct position; however, it also appears to be changing the rotation of the node to (0,0,0) (The node is always at its starting rotation.)</p>
  
  <p>Is there any way to change the position of an SCNNode without affecting the rotation?</p>
  
  <p>Also, I have tried the following but it did not work either (the same thing happened):</p>
  
  <pre><code>_currentlyMoving?.transform.m41 = worldPoint.x
  _currentlyMoving?.transform.m42 = worldPoint.y
  _currentlyMoving?.transform.m43 = worldPoint.z
  </code></pre>
  
  <p>The only other thing that I am doing with the node is the following three lines to stop it from moving while picked up:</p>
  
  <pre><code>_currentlyMoving?.physicsBody?.velocity = SCNVector3Make(0.0, 0.0, 0.0)
  _currentlyMoving?.physicsBody?.velocityFactor = SCNVector3Make(0.0, 0.0, 0.0)
  _currentlyMoving?.physicsBody?.angularVelocity = SCNVector4Make(0.0, 0.0, 0.0, 1.0)
  </code></pre>