how to not randomly active again object that was deactive in array

Questions & Answers
1

how to not randomly active again object that was deactive in array

Hi there Guys, I have a problem with script to randomly activate object in Array,. But I want that object was Active and then deactive, will not randomly active again, so the object in array will not active twice or active again, please help. this my script, ,

Using UnityEngine;
using System.Collections;

public class button : MonoBehaviour {
public static button Instance;

public GameObject[] objectPool;
private int currentIndex = 0;

void Awake () {
	Instance = this;
}

public void random(){

	{

		int newIndex = Random.Range(1, objectPool.Length);
		// Deactivate old gameobject
		objectPool[currentIndex].SetActive(false);
		// Activate new gameobject
		currentIndex = newIndex;
		objectPool[currentIndex].SetActive(true);

	}
}

}

2

I would try something like this. I haven’t tested the code, so I can not guarantee anything :

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class button : MonoBehaviour {

    public static button Instance;

    public GameObject[] objectPool;
    private int currentIndex = 0;
    private List<int> availableIndices;
    
    void Awake ()
    {
        Instance = this;
        availableIndices = new List<int>();
        
        for( int i = 0 ; i < objectPool.Count ; ++i )
            availableIndices.Add( i ) ;
            
        availableIndices.Remove( currentIndex ) ;
    }
    public void random(){
    {
        int newIndex = Random.Range(0, availableIndices.Count );
        
        // Add current index as available for next call to random() function
        availableIndices.Add( currentIndex ) ;
                
        // Deactivate old gameobject
        objectPool[currentIndex].SetActive(false);
        
        // Activate new gameobject
        currentIndex = newIndex;
        objectPool[currentIndex].SetActive(true);
        
        // Remove the new index from available indices for next call to random() function
        availableIndices.Remove( currentIndex ) ;
    }
}
3

Simply check the object you are trying to deactivate is not already deactivated … Gameobject.activeInHierarchy

4

@irfanys, I would suggest your to use Linq and use List instead of array.
Here is how you code should look:
using UnityEngine;
using System.Collections.Generic;
using System.Linq;

public class button : MonoBehaviour
{
    public static button Instance;
    public List<GameObject> objectPool;
    private int currentIndex = 0;
    void Awake()
    {
        Instance = this;
    }
    public void random()
    {
        int oldindex = objectPool.IndexOf(objectPool.Where(obj => obj.activeSelf).ToList()[0]);
        objectPool[oldindex].SetActive(false);
        int newIndex = -1;
        while (newIndex<0||newIndex == oldindex)
            newIndex = Random.Range(0, objectPool.Count);

        objectPool[newIndex].SetActive(true);
    }
}