Question Grab Rotation Fix

So I understand that XR Interaction Toolkit is coming up with a solution to this. But before that happens, I need to fix this problem for my project.
When I pick up an object using a ray interactor (or direct interactor), the rotation of the object always resets to match the "hand" or controller. I need the object to keep its rotation. I'm trying to add a script to do this but I can't seem to get it right. I tried to get the rotation this way:

Code (CSharp):

1.     void Start()
2.     {
3.         interactor = grabee.transform.GetComponent<XRGrabInteractable>();
4.     }
5.     void Update()
6.     {
7.         interactor.selectEntered.AddListener(GetRotation);
8.     }
9.     void FixedUpdate()
10.     {
11.         if(interactor.isSelected)
12.             RotateWith();
13.  
14.         if(interactor.isSelected)
15.             MoveWith();
16.     }
17.  
18.     public void GetRotation(SelectEnterEventArgs args)
19.     {
20.         flag = true;
21.         originalRotation = grabee.transform.localRotation;
22.     }
23.  
24.     public void MoveWith()
25.     {
26.         grabee.transform.position = grabber.transform.position;
27.     }
28.  
29.     public void RotateWith()
30.     {
31.         if(flag)
32.         {
33.             grabee.transform.localRotation = grabber.transform.localRotation * originalRotation;
34.             flag = false;
35.         }
36.         else
37.         {
38.             grabee.transform.localRotation = grabber.transform.localRotation;
39.         }
40.     }

But I think I need to get the rotation right before selectEntered. But I don't know how or if that's really the way. Any help would be much appreciated.

 

I think this is where things could be wrong.

Multiplication does not seem right, I would have used the object rotation, and then add the hand's rotation like -

Code (CSharp):

1. grabee.transform.localRotation =  originalRotation + grabber.transform.localRotation;

I mean it's totally untested but you could give it a shot.

 

That was my first instinct too but localRotations are of the type Quaternion which you can't use + for. I will try converting them to Euler angle and giving a try though. Thanks.

 

Hi. Is there any updated code here, including declarations. I'm a unity newbie and am trying to do the same thing with similar issues. Thanks in advance for the help.

 

Same for me. I am working with VRTK 4 grabbers, but the problem should be of the same kind.