making a no-spawn-zone with triggers

making a game that after every round, asteroids will spawn randomly on the screen instead of inside a 2d circle collider that I set up in the middle of the screen. But my code doesn’t seem to be working. Here’s the code…

void Start () {
	safeZone = GetComponentInChildren<CircleCollider2D>();

void PlaceAsteriods () {

	GameObject ASP = new GameObject("Spawner");
	bool cannotPlaceThere = true;

	for (int a = 0; a < 4 + round; a++) {

		ASP.transform.position = new Vector3(Random.Range(SB.leftConstraint, SB.rightConstraint), Random.Range(SB.topConstraint, SB.bottomConstraint));

		while(cannotPlaceThere) {
			if (triggeredTag != Tags.spawnPos)
				cannotPlaceThere = false;

		Instantiate (bigAsteriods[Random.Range(0, bigAsteriods.Length)], ASP.transform.position , ASP.transform.rotation);

void OnTriggerEnter2D(Collider2D hit) {
	triggeredTag = hit.collider.tag;


Anyone have an idea on how to not spawn a rock in the circle collider?

you could make a script that destroys the asteroid the second it hits the collider

function OnCollisionEnter(col: Collision){
  if (col.gameObject.CompareTag("asteroid")){

You have an infinite while loop. Nothing inside your while loop will change the value of triggeredTag, so it will run for ever. Note that the OnTriggerXXX methods are not called during an update method.

Here is how I would structure it

  • Pick a random position
  • Check if your random position is inside your collider (use a ray cast?). If not then start over
  • Spawn the asteroid