private void OnCollisionEnter(Collision collision)

     {

        rb.useGravity = false;

        rb.constraints = RigidbodyConstraints.FreezeRotation;

        rb.constraints = RigidbodyConstraints.FreezePosition;

        collision.gameObject.transform.parent = GameObject.Find("ImageTarget").transform;    // This line image target and collision object combine. Thus, non-moving object move direction of image target. TAG:           stcik objects

        Debug.Log("Collission detect.");

     }

     //Deniz BABAT

As I said, you can set the game object transform so to duplicate the same values of the original object, using this code:

gameObject.transform.localScale =  desired local scale (e.g. the one of another object)

But you should definitely debug your code and understand why you are getting such small scale values...

Also, probably worth checking in the Unity websoite about how to Instantiate / clone game objects, as this goes beyond the scope of Vuforia:

http://docs.unity3d.com/Documentation/ScriptReference/Object.Instantiate.html

Thank you for your answer. i done it in Unity. I duplicate it in one script and change the duplicate's scale in other script. i do not know why it is not work when do it in same script

The duplicate Script

void onDuplicat(){
        Debug.LogError("Test Step two OK");
        if (duplicateObject){
            pickedObject = GameObject.Find("teapot");
            childObject = Instantiate(pickedObject.gameObject,new Vector3(0,0,0),Quaternion.identity) as GameObject;
            childObject.gameObject.transform.parent = GameObject.Find("IMAGE2").transform
        }
    }

Change the Scale Script

 void onChangeScale(){
        Debug.LogError("Test Step two OK");
        if (duplicateObject){
            pickedObject = GameObject.Find("teapot(Clone)");
            childObject.transform.localScale = new Vector3(0.1f,0.1f,0.1f);
            childObject.transform.localPosition = new Vector3(0,0,0);
        }
         
    }

Also, i find that the Scale of the duplicate is very small, about 5e-3, and the Rotation is different . How can i duplicate the exactly transform values of 3D Object?

You can change localScale of any game object by doing:

gameObject.transform.localScale = new Vector3 (  sx,  sy,  sz );

Is it any sample apps of Diminoes of unity? I cannot find it in the website

I want to study how to  duplicate the 3D object, also, i want to study how to clean the 3D object in runtime

Thanks

The code you posted does not show how you set the pickedObject and the parentObject;

first you should verify / debug if those are correctly set; then, if everything is correctly setup, you may also need to check the localScale of your childObject (currently youu are setting the localPosition to new Vector3(0,0,0), but you could also change the localScale; for example, the object may be too small (and thus not visible) due to the parent scale...

using UnityEngine;
using System.Collections;

public class Test : MonoBehaviour, ITrackableEventHandler{

private TrackableBehaviour mTrackableBehaviour;
private bool duplicateObject = false;
public GameObject pickedObject;
public GameObject childObject = null;
public GameObject parentObject ;

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

}

public void OnTrackableStateChanged(TrackableBehaviour.Status previousStatus,TrackableBehaviour.Status newStatus){
if (newStatus == TrackableBehaviour.Status.DETECTED || newStatus == TrackableBehaviour.Status.TRACKED){
duplicateObject = true;
Debug.LogError("True111111");
onDuplicat();
}else{
duplicateObject = false;
}
}

// Update is called once per frame

void onDuplicat(){
Debug.LogError("True33333");
if (duplicateObject){
Debug.LogError("True2222222");
childObject = Instantiate(pickedObject.gameObject,new Vector3(0,0,0),Quaternion.identity) as GameObject;
childObject.gameObject.transform.parent = parentObject.transform;
childObject.transform.localPosition = new Vector3(0,0,0);
Debug.LogError("The parent: "+ childObject.gameObject.transform.parent +"!!!");
}

}
}

Hi, this is the code i have done.

The problem is i cannot see the gameObject in runtime

Hi, 

not sure I fully understand what you are trying to achieve; could you explain it a bit more clearly?