如何使DefaultTrackableEventHandler脚本检查随机选择的游戏对象是否与相机显示的游戏对象相同？

Question

This is the script that gets a randomly selected object from an array of game objects:

public GameObject[] models;
       GameObject currentPoint;
       int index;
 public AudioSource correct;
 public AudioSource notcorrect;

 void Start()
 {
     models = GameObject.FindGameObjectsWithTag("numbers");
     index = Random.Range (0, models.Length);
     currentPoint = models[index];
     print (currentPoint.name);
     models [index].GetComponent<AudioSource> ().PlayDelayed(2);
     }

So now it gets a random game object and plays it's relevant AudioClip (for ex number 5), and now in the DefaultTrackableEventHandler i need to check if the number that is shown to the camera is equal to the number that was randomly selected.

I am posting the DefaultTrackableEventHandler script below:

using UnityEngine;

namespace Vuforia
{
    /// <summary>
    /// A custom handler that implements the ITrackableEventHandler interface.
    /// </summary>
    public class DefaultTrackableEventHandler : MonoBehaviour,
    ITrackableEventHandler
    {
        #region PRIVATE_MEMBER_VARIABLES

        private TrackableBehaviour mTrackableBehaviour;

        #endregion // PRIVATE_MEMBER_VARIABLES



        #region UNTIY_MONOBEHAVIOUR_METHODS

        void Start()
        {
            mTrackableBehaviour = GetComponent<TrackableBehaviour>();
            if (mTrackableBehaviour)
            {
                mTrackableBehaviour.RegisterTrackableEventHandler(this);
            }
        }

        #endregion // UNTIY_MONOBEHAVIOUR_METHODS



        #region PUBLIC_METHODS
        public GameObject show;
        public GameObject hide;
        /// <summary>
        /// Implementation of the ITrackableEventHandler function called when the
        /// tracking state changes.
        /// </summary>
        public void OnTrackableStateChanged(
            TrackableBehaviour.Status previousStatus,
            TrackableBehaviour.Status newStatus)
        {
            if (newStatus == TrackableBehaviour.Status.DETECTED ||
                newStatus == TrackableBehaviour.Status.TRACKED ||
                newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)
            {
                OnTrackingFound();
            }
            else
            {
                OnTrackingLost();
            }
        }

        #endregion // PUBLIC_METHODS



        #region PRIVATE_METHODS


        private void OnTrackingFound()
        {
            show.SetActive(true);
            Renderer[] rendererComponents = GetComponentsInChildren<Renderer>(true);
            Collider[] colliderComponents = GetComponentsInChildren<Collider>(true);
            AudioSource[] audiocomponents  = GetComponentsInChildren<AudioSource>(true);
            // Enable rendering:
            foreach (Renderer component in rendererComponents)
            {
                component.enabled = true;
            }


            // Enable colliders:
            foreach (Collider component in colliderComponents)
            {
                component.enabled = true;
            }

            //Enable AudioSource 
            foreach (AudioSource component in audiocomponents)
            {
                component.enabled = true;
            }

            Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " found");
        }


        private void OnTrackingLost()
        {
            hide.SetActive(true);
            Renderer[] rendererComponents = GetComponentsInChildren<Renderer>(true);
            Collider[] colliderComponents = GetComponentsInChildren<Collider>(true);
            AudioSource[] audiocomponents  = GetComponentsInChildren<AudioSource>(true);
            // Disable rendering:
            foreach (Renderer component in rendererComponents)
            {
                component.enabled = false;
            }

            // Disable colliders:
            foreach (Collider component in colliderComponents)
            {
                component.enabled = false;
            }
            //Disable AudioSource
            foreach (AudioSource component in audiocomponents)
            {
                component.enabled = false;
            }

            Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " lost");
        }

        #endregion // PRIVATE_METHODS
    }
}

Please help me !!

Answer 1

Vuforia works with data sets containing trackable source, so let's say you have 5 objects and they represent numbers from 1 to 5, you need to have five trackables in your data sets. Those are created on the Vuforia portal.

Then, you pick a game object, this game object should be related to a trackable. You can define the names to match, then you can do:

StateManager sm = TrackerManager.Instance.GetStateManager ();
// This gets all the trackable currently tracked
// so if you are looking at 3 and 5 it will contain both
IEnumerable<TrackableBehaviour> activeTrackables = sm.GetActiveTrackableBehaviours ();
 
foreach (TrackableBehaviour tb in activeTrackables) {
    // As you iterate, you compare with current game object name
    // if you have 3 and 5 and target object is 5 then you get a match.
    if( tb.TrackableName == currentObject.name) { }
}