Forum Discussion

abdur.rahman.709771's avatar
abdur.rahman.709771
Honored Guest
2 years ago

Add Object Interactions During Runtime

Hello,

I'm trying to instantiate an object during runtime and need to add interactions to it. Specifically I want to add a mesh collider, rigiidbody, HandGrabInteractable, Grabbable, OneGrabFreeTransformer and TwoGrabFreeTransformer to the object. I can not create a prefab for the object as I'm importing it from a server and adding it to the scene during runtime. The issue I'm currently facing is that though I can add the components during runtime, how do I set the proper references in Grabbable for the transformers and in the HandGrabInteractable to the grabbable. I tried creating a prefab with all of the 5 components attached to it and add it as a child for the 3d object but for some reason this doesn't work.

3 Replies

  • Big_Flex's avatar
    Big_Flex
    Meta Employee
    2 years ago

    Hi abdur.rahman.709771, have you tried using the "Inject" functions in the Interactor and Interactable scripts and their child classes? Those functions will let you specify components at runtime.  

  • Samer157's avatar
    Samer157
    Honored Guest
    2 years ago

    Hi abdur.rahman.709771 , you need to use the Inject functions to assign the Rigidbody and Grabbable to the HandGrabInteractable component as Big_Flex mentioned. But the other thing that is needed is to register the interactable with the registry if you're doing this at runtime. For example:

    var grabbable = gameObject.AddComponent<Grabbable>();
    var rigidBody = gameObject.GetComponent<Rigidbody>(); // or add if you don't have it
    handGrabInteractable = gameObject.AddComponent<HandGrabInteractable>();
    handGrabInteractable.InjectRigidbody(rigidBody);
    handGrabInteractable.InjectOptionalPointableElement(grabbable);
    HandGrabInteractable.Registry.Register(handGrabInteractable); // This is the part that's essential to work at runtime.

    I had the same issue and was wondering why it won't work at runtime and had to dig to find this. Hope this helps!

    • moritz's avatar
      moritz
      Explorer
      12 months ago

      Hey, thanks for your comment. Helped me out a great deal!

      For anybody looking for something similar for Injecting in grabbable scripts, this might help out:

      private ITransformer oneGrabTranslateTransformer;
private Grabbable grabbable;

void Awake()
{
oneGrabTranslateTransformer = grabbableObject.GetComponent<OneGrabTranslateTransformer>();
grabbable = grabbableObject.GetComponent<Grabbable>();
}

private void InjectTranslateScript()
{
grabbable.InjectOptionalOneGrabTransformer(oneGrabTranslateTransformer);
oneGrabTranslateTransformer.Initialize(grabbable);
}

      Basically what I missed was the Initialize 🙂

      Hope that helps someone