instantiating too many objects

Questions & Answers
1

I have a boss that summons spawn enemies, but I only want one enemy spawned per spawn point. So I’m not sure what’s going on within my code that causes it to spawn many enemies at the same location.

bool isSpawned;

Start()
{

isSpawned = false;

}

//transition ability
	void RaiseDead()
	{
		if(Input.GetKey(KeyCode.Alpha1))
		{
			animation["Summon"].wrapMode = WrapMode.Loop;
			animation.CrossFade("Summon");
			
			auraHand.Play();
			shieldWall.Play();
			shieldWallCollider.enabled = true;
			
			StartCoroutine(SummonDead());
		}
	}

	IEnumerator SummonDead()
	{
		//spawn summoning particles
		yield return new WaitForSeconds(3);
		summonParticle1.Play();

		//spawn skeletons
		if(!isSpawned){
		yield return new WaitForSeconds(3);
		Instantiate (skeleton, spawnPoint1.position, spawnPoint1.rotation);
		isSpawned = true;
		}

		//despawn summoning particles 
		yield return new WaitForSeconds(1);
		summonParticle1.Stop();
		yield break;
	}
2

basically what i think happens is that on key press you run a few coroutines and they are all isSpawned = false still because it waits 3 seconds for it to become true…
in simple terms, you call the coroutine several times.

instead of Input.GetKey(KeyCode.Alpha1)

use = Input.GetKeyDown(KeyCode.Alpha1)

and make the isSpawned bool false straight away without waiting 3 seconds