Question Unable to grab object with hands tracking

Hi,
I try to use the hand tracking for Quest.
It works well for detection of hands.
I try to grab a cube with OVRGrabber and OVR Grabbable but it doesn't work.
Here are screens for the R_hand and the grabbable cube.
Do you know how to do ?
I tried to find a tutorial with this version but found nothing.
Thanks a lot.

 

Hello. Valem made a short tutorial on this a long time ago. You will need to make some minor changes since the oculus integration has been updated since, but most of it is still the same:

 

You have to attach a HandGrabber script to your Hand. Here, I used fingers pinching strength to grab the objects. When index pinching strength greater than the threshold, the grab begins else grab ends

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5. using OculusSampleFramework;
6.  
7. public class HandGrabber : OVRGrabber
8. {
9.     public OVRHand hand;
10.     public float pinchTreshold = 0.7f;
11.  
12.     public Text handDetails;
13.  
14.     public Text IndexText;
15.     public Text RingText;
16.     public Text MiddleText;
17.     public Text PinkyText;
18.     public Text MaxText;
19.     public Text ThumbText;
20.  
21.     private Rigidbody rb;
22.  
23.     // Start is called before the first frame update
24.    protected override void Start()
25.     {
26.         base.Start();
27.         //hand =  hand.GetComponent<OVRHand>();
28.         if(m_grabbedObj)
29.         {
30.             rb = m_grabbedObj.GetComponent<Rigidbody>();
31.         }
32.        
33.     }
34.  
35.     public override void Update()
36.     {
37.         base.Update();
38.        
39.         CheckIndexPinch();
40.        
41.     }
42.  
43.     public void CheckIndexPinch()
44.     {
45.         float pinchIndexStrength = GetComponent<OVRHand>().GetFingerPinchStrength(OVRHand.HandFinger.Index);
46.  
47.        
48.  
49.         float pinchRingStrength = GetComponent<OVRHand>().GetFingerPinchStrength(OVRHand.HandFinger.Ring);
50.  
51.         float pinchPinkyStrength = GetComponent<OVRHand>().GetFingerPinchStrength(OVRHand.HandFinger.Pinky);
52.  
53.      
54.         IndexText.text = pinchIndexStrength.ToString();
55.         RingText.text = pinchRingStrength.ToString();
56.         //MiddleText.text = pinchMiddleStrength.ToString();
57.         PinkyText.text = pinchPinkyStrength.ToString();
58.        
59.  
60.         bool isPinching = pinchIndexStrength > pinchTreshold;
61.      
62.         if (!m_grabbedObj && isPinching && m_grabCandidates.Count > 0 )
63.             GrabBegin();
64.         else if (m_grabbedObj && !isPinching)
65.             GrabEnd();
66.  
67.         float pinchMaxStrength = GetComponent<OVRHand>().GetFingerPinchStrength(OVRHand.HandFinger.Max);
68.         MaxText.text = pinchMaxStrength.ToString();
69.         float pinchThumbStrength = GetComponent<OVRHand>().GetFingerPinchStrength(OVRHand.HandFinger.Thumb);
70.         ThumbText.text = pinchThumbStrength.ToString();
71.  
72.     }
73.  
74.     protected override void GrabBegin()
75.     {
76.         base.GrabBegin();
77.         handDetails.text = transform.name;
78.        
79.         if (rb != null && rb.isKinematic == false)
80.         {
81.             rb.isKinematic = true;
82.         }
83.     }
84.  
85.     protected override void GrabEnd()
86.     {
87.         if(m_grabbedObj)
88.         {
89.             Vector3 lineraVelocity = (transform.position - m_lastPos) / Time.fixedDeltaTime;
90.             Vector3 angularVelocity = (transform.eulerAngles - m_lastRot.eulerAngles) / Time.fixedDeltaTime;
91.  
92.             GrabbableRelease(lineraVelocity, angularVelocity);
93.  
94.         }
95.         if (rb != null && rb.isKinematic == true)
96.         {
97.             rb.isKinematic = false;
98.         }
99.  
100.         GrabVolumeEnable(true);
101.     }
102.  
103.  
104. }