IndexOutOfRangeException: Array index is out of range when using an Array and instantiating

Questions & Answers
1

Within my level i’m wanting to spawn some collectible coins throughout the level at certain points. This is my code i currently have for instantiating a coin prefab at desired spawn points:

var coin : GameObject;
var coinspawn: Transform[];

function OnTriggerEnter(other : Collider){
        if (other.tag == "Player"){
	    for (var i = 0; i < coinspawn.length; i++);
        var coinClone : GameObject = Instantiate (coin, transform.position, transform.rotation);
     	coinClone.transform.position = coinspawn*.position;	*
  • }*
    }
    The problem i’m having is that Unity says IndexOutOfRangeException: Array index is out of range. and points to my coinClone.transform.position = coinspawn_.position; line as the problem but i’m none the wiser as to what exactly it means in my situation._
    As it stands Unity flags the error and when i continue all the clones have been instantiated but just not at the spawn points. What am i doing wrong?
2

The error means that the value of i is too large in this case. i is always coinspawn.length in your script because your for-loop-body is empty! The loop will run through all iterations and after it is finished only one coin is created. I guess you want the prefab instantiation to be inside the loop body:

var coin : GameObject;
var coinspawn: Transform[];

function OnTriggerEnter(other : Collider)
{
    if (other.tag == "Player")
    {
        for (var i = 0; i < coinspawn.length; i++)
        {
            var coinClone : GameObject = Instantiate (coin, transform.position, transform.rotation);
            coinClone.transform.position = coinspawn*.position;* 
 *}*
 *}*
*}*
*```*
3

Thanks Bunny 83, this now works as intended! :slight_smile: