If I understand correctly what you describe, 

you should be able to do this by saving the reference frame of the first target when the second is detected, and then compute a relative transformation of one target rference frame to the other.

Based on this, you could implement the animation of the target; we don't have a tutorial for this, 

but have a look at the Unity Transform class, which provides the relevant method, to start with:

http://docs.unity3d.com/Documentation/ScriptReference/Transform.html

The rest sounds more like Unity animation programming and 3D maths.

yes you're right .. im think use transform for solution ..

but for send value true or false for object to move when marker detected how ?
 

i see the code in below .

public class ImageTargetPlayAudio : MonoBehaviour,
                                            ITrackableEventHandler
{
    private TrackableBehaviour mTrackableBehaviour;
 
    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 ||
            newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)
        {
            // Play audio when target is found
            audio.Play();
        }
        else
        {
            // Stop audio when target is lost
            audio.Stop();
        }
    }  
}

but the code in above when first image detected his do something is playaudio. and how when detected object number two do something ?

any reference admin ?

Have a look at this article:

https://developer.vuforia.com/forum/faq/unity-how-do-i-get-list-active-trackables

This explains how you can retrieve the complete list of ALL the targets that are currently detected/tracked, and it also shows an example of how to check if  2 differnet targets are tracked at the same time.

ok wait a few hours ... i'll will try .. please dont locked thread ...

im scare have error and question more .. okay ?

and thanks for you're suggest . im appreciate it .

(y)  ....

Hi All, where content I must edit / make that script ??

You saved a life... Thanks a lot!!