Destroy the first GameObject out of x fired

Questions & Answers
1

I want to destroy the first spawned gameobject once x amount of gameobjects are spawned. So lets say I shoot projectiles. Then I want to despawn or destroy the first projectile I shot (which will be the one the most far away) once I’ve shot lets say 5 projectiles. So there can’t be more than 5 projectiles in the air.

How do I go about doing this? I tried the FindGameObjectsWithTag.Length method to count the amount of projectiles, but then I dont know how to destroy the one I shot first from the 5.

On the player I have the playerController script. This spawns the gameobjects or projectiles once I hit the spacebar.

public GameObject Projectile;

void Update()
    {if (Input.GetKeyDown(KeyCode.Space))
            {
                //spawn projectile 
                Instantiate(Projectile, transform.position, Projectile.transform.rotation);
            }

This works to shoot the projectiles. And then on the projectile itself I have the ProjectileDestroy script:
I gave the projectile a tag. “Projectiletag”.

 public int Projectiles;

    // Start is called before the first frame update
    void Start()
    {
        GameObject.FindGameObjectsWithTag("Projectiletag").Length;
        
    }
    void Update()
    {

        if (GameObject.FindGameObjectsWithTag("Projectiletag").Length== 5)
        {
            Destroy(gameObject);
        }

This code destroys all projectiles once 5 are reached. Not the one I shot first. Any help is appreciated.

2

Remove the script you’ve attached to the projectile and use this on the spawner:

Code not tested

//At the top of the file
using System.Collections.Generic;

// In the class
public GameObject Projectile;
public int MaxProjectileCount = 5;
private Queue<GameObject> projectiles = new Queue<GameObject>();


 void Update()
 {
         if (Input.GetKeyDown(KeyCode.Space))
         {
             //spawn projectile 
             GameObject instance = Instantiate(Projectile, transform.position, Projectile.transform.rotation);
             projectiles.Enqueue(instance);
             while(projectiles.Count > MaxProjectileCount)
                  Destroy(projectiles.Dequeue());
         }