Question by kubajs · Jan 31, 2021 at 08:50 PM · interaction execution order

2 XRGrabInteractable scripts on one game object (parent, child), second grab interactable does not respond

Hi guys,

I'm facing strange issue with XRGrabInteractable script. I can only re-create this issue when building for Android (Oculus). Issue not met on Windows build. Problem - I have 2 XRGrabInteractable components on single gun object. One is attached to the gun handle collider (parent object), another one is attached to gun slider (to do manual gun pistol reload) on some child object. When starting android build, the XRGrabInteractable attached to the slider doesn't respond. I basically cannot move the slider. I figured out I have to disable and re-enable the XRGrabInteractable to get it working instantly.

Therefore I created the following nasty hack which works:

 public class GrabInteractableHack : MonoBehaviour
 {
     private XRGrabInteractable _grabInteractable;
 
     private void Awake()
     {
         _grabInteractable = GetComponent<XRGrabInteractable>();
         _grabInteractable.enabled = false;
     }
 
     void Start()
     {
         _grabInteractable.enabled = true;
     }
 }

Not sure whether scripts execution order settings in Projects Settings / Script Execution Order would help. But anyway, I'm curious why this occurs.

Any idea welcome!

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