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Question by kevinspawner · Aug 10, 2015 at 08:13 AM · gameobjectinstantiate

Non Repetative Random.Range

Is it possible to randomize without repeating the same value again? As you can see in the below script, If I instantiate the game object from array, Game objects are repeating, I want the game object to be shuffled not repeated. Any help would be appreciated. Thanks in advance.

 public GameObject[] answerPrefabs;  
     public Transform[]  spawnPos;
 
     public void Start()
     {
         for(int i = 0; i<spawnPos.Length; i++)
         {
             int answerClone= Random.Range(0,answerPrefabs.Length);    
             Instantiate(answerPrefabs[answerClone],spawnPos[i].position,spawnPos[i].rotation);
         }
     }
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Answer by NeverHopeless · Aug 10, 2015 at 08:40 AM

A possibility to remove the instantiated element from array. I would suggest to use System.Collections.Generic.List<T> instead. Try like this:

  public List<GameObject> answerPrefabs;  
  public List<Transform>  spawnPos;
  
  public void Start()
  {
       for(int i = spawnPos.Length - 1; i >= 0; i--)
       {
          int answerClone= Random.Range(0, answerPrefabs.Count);    
          Instantiate(answerPrefabs[answerClone],spawnPos[i].position,spawnPos[i].rotation);

          // Remove the instantiated element from list.
          answerPrefabs.RemoveAt(answerClone);
          spawnPos.RemoveAt(answerClone);
       }
  }

Hope it helps!

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avatar image kevinspawner · Aug 10, 2015 at 08:48 AM 0
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Awesome. Thanks you very much! I ave a question for you.

If I use my previous method, answerPrefabs.RemoveAt(answerClone); I cant use this as it is not a list right? So how do i remove the repetitive one?

avatar image cjdev · Aug 10, 2015 at 08:51 AM 0
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I think you mean Remove() ins$$anonymous$$d of RemoveAt(). The first removes the instance of the object parameter from the list while the second takes an index as a parameter and removes the object from that index in the list.

avatar image kevinspawner · Aug 10, 2015 at 10:12 AM 0
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Thanks. I understood now.

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