add an object as a child problem

Hi
I have a moving object containing some objects.
When i'm creating some of the child objects and setting the parent to parent object, the created object does not move with parent.
I checked the hierarchy panel. but the created objects are not in the parents as a child.

this is my code:
GameObject parent = GameObject.Find ("Ground");
clone.transform.parent = parent.transform;

what is the problem

 

Have you tried verifying that parent is being assigned correctly?

 

yes.

Here is complete function

void OnTriggerExit2D(Collider2D other)
{
GameObject clone;
clone = Instantiate(other,
new Vector2(other.transform.position.x + (other.transform.lossyScale.x / 20),other.transform.position.y),
other.transform.rotation) as GameObject;
//clone.rigidbody2D.velocity = -Vector2.right * 5;
GameObject parentObject = GameObject.Find ("Ground");
clone.transform.parent = parentObject.transform;
//print (parent.name);
}

 

May sound like a stupid question, but:

Does this "Clone" object, contains a rigidbody?

If yes, probably this is the problem. The parent moves, but the child still has his own physics.

 

It would still be parented to the correct transform, though, I think.

I think I'm missing something as I can't see an issue with that code. I would suggest running the Find() function in Start() or Awake() and add the parentObject as a member variable, though. There's no point in having to find the object over and over again if it's always going to be referencing the same object. I'd also use:

Code (CSharp):

1. Transform parentObject = GameObject.Find ("Ground").transfom;
2. clone.transform.parent = parentObject;

Unless there's a reason for you to reference the gameObject itself.

The full script might be helpful, unless someone can spot something I'm missing.

 

I did what you said but the problem still exists.
Here is my complete script after fixing small problems.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class EnterTriggerControl : MonoBehaviour {
5.  
6.     Transform parentObject;
7.  
8.     void Start(){
9.         parentObject = GameObject.Find ("Ground").transform;
10.     }
11.  
12.     void OnTriggerExit2D(Collider2D other){
13.         GameObject clone;
14.         clone = Instantiate(other,
15.                             new Vector2(other.transform.position.x + (other.transform.lossyScale.x / 20),other.transform.position.y),
16.                             other.transform.rotation) as GameObject;
17.         clone.transform.parent = parentObject;
18.  
19.     }
20. }

Yes the child has rigidbody 2D. But parent Does not.

Here is my Hierarchy window after creating object.

 

Sorry, I misunderstand the problem, so, when an object enters in your trigger you create another instance of this object?

Don't know if this may be the problem (didn't tested...), but try to replace this line:

Code (CSharp):

1. clone = Instantiate(other,
2. new Vector2(other.transform.position.x + (other.transform.lossyScale.x / 20),other.transform.position.y),
3.                             other.transform.rotation) as GameObject;

For this:

Code (CSharp):

1. clone = Instantiate(other.gameObject,
2.                             new Vector2(other.transform.position.x + (other.transform.lossyScale.x / 20),other.transform.position.y),
3.                             other.transform.rotation) as GameObject;

(Instead of passing a Collider, use the GameObject)

 

I don't know why, but this fixed the problem. Really thank you arthur_fukushima

 

No problem

I think that's because you were trying to create a collider, the correct is to create a new gameobject.