Player instantiates TWICE after killed by two enemies simultaneously.

dommyp

I'm following along with Brackey's "How to make a 2D game " series, and am now up to his wave spawner videos. Everything has been working fine so far, but now I'm running into an issue where I sometimes get two players spawning. I think it's happening if I am killed by two enemies simultaneously, so the _RespawnPlayer() method is being called twice. 

The players both move around and shoot together, but can fall off the platforms separately. It's not exactly what I had intended so I'd love to hear if anyone has a fix for this!

dommyp

Here's my GameMaster script:

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class GameMaster : MonoBehaviour

{

   

  public static GameMaster gm;

  public CameraShake camShake; //reference to the camera shake

  public float spawnCamShakeAmount = 0.05f;

  public float spawnCamShakeDuration = 0.1f;

  void Awake()

  {

    if (gm == null)

    {

      gm = this; //so we have a static variable called "gm" and we set it equal to this instance of the game master class if it's not already set 

    }

  }

  void Start()

  {

    camShake = GameMaster.gm.GetComponent<CameraShake>();

    if (camShake == null)

    {

      Debug.LogError("No CameraShake script found on GM object.");

    }

  }

  //variable containing reference to player Prefab

  public GameObject playerPrefab;

  //variable containing reference to spawn point

  public Transform spawnPoint;

  //create an integer containing seconds to delay before respawning

  public float spawnDelay = 2f;

  //variable containing reference to particle spawn prefab

  public GameObject spawnPrefab; //don't need to use Transform if we're not going to access the Transform component (such as Transform.position), which we're not in this case

  

            //underscore to signify that this is a LOCAL method, not a STATIC method

  public IEnumerator _RespawnPlayer() //IEnumerator is a "coroutine" which allows the function to be delayed before being called (in the "yield return new" line below

  {

     

    //play the respawn audio clip which has been dragged onto the _GM 

    GetComponent<AudioSource>().Play();

    yield return new WaitForSeconds(spawnDelay); //waits for the given number of seconds (determined by the spawnDelay variable) before respawning

    Instantiate(playerPrefab, spawnPoint.position, spawnPoint.rotation); //instantiate player

    camShake.Shake(spawnCamShakeAmount, spawnCamShakeDuration); 

    GameObject clone = Instantiate(spawnPrefab, spawnPoint.position, spawnPoint.rotation);

    Destroy(clone, 3f); //this destroys the instantiated particles (which we've called "clone", which is standard practice for a briefly instantiated game object) after 3s

  }

  public static void KillPlayer(Player player) //function which accesses the Player class (which we made in the Player script), and we're calling the player "player"

  {

    Destroy(player.gameObject);

    gm.StartCoroutine(gm._RespawnPlayer()); //calls the RespawnPlayer method defined above

  }

  public static void KillEnemy(Enemy enemy)

  {

    gm._KillEnemy(enemy); //call the _KillEnemy method we created below

  }

  public void _KillEnemy(Enemy _enemy) //underscore to signify that this is a LOCAL method, not a STATIC method

  {

    //initiate enemy death particles, at the enemy position, with no additional rotation

    GameObject _clone = Instantiate(_enemy.deathParticles, _enemy.transform.position, Quaternion.identity) as GameObject;

    //destroy the enemy death particles after 5 seconds

    Destroy(_clone, 5f);

    camShake.Shake(_enemy.enemyCamShakeAmount, _enemy.enemyCamShakeDuration);

    Destroy(_enemy.gameObject);

  }

}