Creating a random prefab generator in C# for endless runner

Questions & Answers
1

Hey Everyone,
I’m making an endless runner game for my current college (UK) project, but I’m unable to create a script that generates a random prefab (from a list of prefabs) one after the other. Any help with this would be appreciated so much as I am relatively new to both Unity and C#, Thanks!
Dale

2

I don’t recommend you to Call this CreatePrefab() function inside Update() function. As it will create infinite number of prefabs and will decrease your game performance, So I recommend you to have Entry or exit trigger to instantiate the prefab objects. :slight_smile:

Also check this question : Infinite Runner World creation [sloved]

public GameObject[] _myPrefabs;

	void Start()
	{

		CreatePrefab();
	}
	
	void CreatePrefab()
	{
		GameObject clone = Instantiate(_myPrefabs[RandomNumber()])as GameObject;
	}

	int RandomNumber()
	{
		System.Random rand = new System.Random();
		return rand.Next(0,_myPrefabs.Length);
	}
3

You may use the Random.Range function and a switch/case cicle.
EDIT: Sorry, i forgot to write that this is in Javascript. It may be useful for who is searching the answer but doesn’t write code in C#

Example:

#pragma strict
private var rand:int;

function FixedUpdate(){
rand=Random.Range(1,4);
case 1:
Instantiate(<prefab1>);
break;
case 2:
Instantiate(<prefab2>);
break;
case 3:
Instantiate(<prefab3>);
break;
case 4:
Instantiate(<prefab4);
break;
}

Maybe it is not the best way…
P.S Remember to change your physics timestep.

4

why case you just create

int rnd ;

rnd=Random.Range(0,5);

instantiate(tile[rnd],transform.position,transform.rotation);
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