Instantiate random prefab ONCE

Questions & Answers
1

Hi!

I’ve got a simple wave system in place for my game and currently I have it so it spawns prefab 0 and goes up until it reaches the end. I would like it to spawn a random prefab of those. Then I would simply use “Random.Range”. BUT I don’t want it to spawn a prefab twice. I only want it to spawn it once. Like it spawns prefab 4. Then it never spawns that one. How could I do something like this?

Thanks in advance!

3

You can consider using List. Not enough knowledge about it though, correct me anyone if the following codes need to improve. You can try this, worked for me-

using System.Collections.Generic;
.....
public List<GameObject> myList = new List<GameObject>();
.....
void Start () {
    Debug.Log ("Total item now is " + myList.Count);
}
void Update () {
    if(Input.GetKeyDown (KeyCode.Space)){
        if(myList.Count == 0){
			Debug.Log ("No Objects to spawn");
	    } else {
			GameObject itemToSpawn = myList[Random.Range (0, myList.Count)];
			GameObject myItem = Instantiate (itemToSpawn, transform.position, Quaternion.identity) as GameObject;
			myList.Remove (itemToSpawn);
			Debug.Log ("Total item now is " + myList.Count);
	    }
    }
}

And populate the list in the inspector by dragging your prefabs to the list.
Hope it helps somehow.

2

You could make a list of the instanciated prefab,
and then each Random.Range that you use to instanciate, you check if the list contains the chosen prefab.
If its on the list, chose other, if not, instanciate.