Object Manipulator with XR Socket Interactor

[GennaroBaratta]

Discussed in #11785

^{Originally posted by crusher1025 September 29, 2023}
Does the Object Manipulator script with the XR Socket Interactor script in Unity XRI? I was able to get XR Socket Interactor to work with the XR Grab Interactable but not Object Manupulator.

Hi all, has anyone been able to get the XR Socket Interactor to work with the ObjectManipulator?
I'm using Unity 2022.3.12f1 with MRTK3

The cube doesn't snap to the attachTransform, as if the socket doesn't exist

[GennaroBaratta]

I found the problem.
XRSocketInteractor's StartSocketSnapping method is limited to accepting only the XRGrabInteractable type, which unfortunaly is not designed as an interface.

protected override void OnHoverEntered(HoverEnterEventArgs args)
{
    base.OnHoverEntered(args);
    if (!CanHoverSnap(args.interactableObject))
    {
        return;
    }

    if (args.interactableObject is XRGrabInteractable grabInteractable)
        StartSocketSnapping(grabInteractable);
}

protected virtual bool StartSocketSnapping(XRGrabInteractable grabInteractable)
{
    // If we've already started socket snapping this interactable, do nothing
    var interactablesSocketedCount = m_InteractablesWithSocketTransformer.Count;
    if (interactablesSocketedCount >= socketSnappingLimit ||
        m_InteractablesWithSocketTransformer.Contains(grabInteractable))
        return false;

    if (interactablesSocketedCount > 0 && ejectExistingSocketsWhenSnapping)
    {
        // Be sure to eject any existing grab interactable from the snap grab socket
        foreach (var interactable in m_InteractablesWithSocketTransformer.AsList())
        {
            interactable.RemoveSingleGrabTransformer(m_SocketGrabTransformer);
        }
        m_InteractablesWithSocketTransformer.Clear();
    }

    grabInteractable.AddSingleGrabTransformer(m_SocketGrabTransformer);
    m_InteractablesWithSocketTransformer.Add(grabInteractable);
    return true;
}

[AMollis]

@morksvart .... MRTK3 is no longer supported in this repository. Please visit https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity

However, issue is already known, see the following:

• [FEATURE REQUEST] Allow developers to set the Rigidbody movement type on ObjectManipulator MixedRealityToolkit/MixedRealityToolkit-Unity#532

This is being fixed this with this PR:

• Adding Rigidbody MovementType to ObjectManipulator MixedRealityToolkit/MixedRealityToolkit-Unity#526