SpawnAndAttachAfterControllerIsTracking.cs

//======= Copyright (c) Valve Corporation, All rights reserved. ===============
//
// Purpose: Spawns and attaches an object to the hand after the controller has
//          tracking
//
//=============================================================================

using UnityEngine;
using System.Collections;

namespace Valve.VR.InteractionSystem
{
    //-------------------------------------------------------------------------
    public class SpawnAndAttachAfterControllerIsTracking : MonoBehaviour
    {
        private Hand hand;
        public GameObject itemPrefab;

    
        //-------------------------------------------------
        void Start()
        {
            hand = GetComponentInParent<Hand>();
        }


        //-------------------------------------------------
        void Update()
        {
            if ( itemPrefab != null )
            {
                if ( hand.controller != null )
                {
                    if ( hand.controller.hasTracking )
                    {
                        GameObject objectToAttach = GameObject.Instantiate( itemPrefab );
                        objectToAttach.SetActive( true );
                        hand.AttachObject( objectToAttach );
                        hand.controller.TriggerHapticPulse( 800 );
                        Destroy( gameObject );

                        // If the player's scale has been changed the object to attach will be the wrong size.
                        // To fix this we change the object's scale back to its original, pre-attach scale.
                        objectToAttach.transform.localScale = itemPrefab.transform.localScale;
                    }
                }
            }
        }
    }
}