How to Start a Coroutine once when a bool is true

[LagoGames]

Hi, I’m having an issue with my code where I’m trying to spawn enemies between a certain time frame the way I’m doing this is when that time period is true set a bool to true triggering a StartCoroutine. The issue is with this solution they will infinitely spawn while the bool is true. If I disable the bool right evert the enemies are spawning or use a WaitForSeconds after spawning, The enemies are not spawned at all both scripts work independently and out separate scripts. Both are below with the timer on top and the spawning code below it. Thank you so much for your advice and help and I appreciate it so much. If you have any questions or possible solutions I would love to hear them. Thank you all very very much.

   [SerializeField] private Gradient lightColor;
    [SerializeField] private GameObject light;

    private int days;
    public int Days => days;

    private float time = 50;

    private bool canChangeDay;

    [HideInInspector]
    public bool isNight;
    private bool spawning = false;

    public delegate void OnDayChanged();

    public OnDayChanged DayChanged;

    public static DayNightCycle instance;

    void Start()
    {
       
        instance = this;
        spawning = false;
        isNight = false;
        HUD.instance.TimeText.text = "Day";
    }


    void Update()
    {

        Debug.Log(time);

        if (time > 500)
        {
            time = 0;
        }

        if(spawning = false && (int)time > 200 && (int)time < 300)
        {
            isNight = true;
            Debug.Log("night");
            spawning = true;
            HUD.instance.TimeText.text = "Night";
        }
        else
        {
            isNight = false;
            spawning = false;
            // Debug.Log("day");
        }
       
          
       

        if((int)time == 250 && canChangeDay)
        {
            canChangeDay = false;
            DayChanged();
           
            days++;
           
        }

        if((int)time == 255)
       
            canChangeDay = true;

            time += Time.deltaTime;
            light.GetComponent<Light2D>().color = lightColor.Evaluate(time * 0.002f);
               

    }

    IEnumerator Night()
    {

      
        Debug.Log("night");
        yield return new WaitForSeconds(1f);
        spawning = true;

    }


}

---

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class WaveSpawner : MonoBehaviour
{
    [System.Serializable]
    public class Wave
    {
        public Enemy[] enemies;
        public int count;
        public float timeBetweenSpawns;

    }

    public Wave[] waves;
    public Transform[] spawnPoints;
    public float timeBetweenWaves;
    private bool StartNight;

    private Wave currentWave;
    private int currentWaveIndex;
    private Transform player;

    private void Start()
    {
        player = GameObject.FindGameObjectWithTag("Player").transform;

       // StartCoroutine(StartNextWave(currentWaveIndex));
    }

    void Update()
    {
       

        if(DayNightCycle.instance.isNight == true)
        {
           
            StartCoroutine(StartNextWave(currentWaveIndex));
            Debug.Log("night");
           
        }
        else
        {
            return;
        }
    }
   

    IEnumerator StartNextWave(int index)
    {
        yield return new WaitForSeconds(timeBetweenWaves);
        StartCoroutine(SpawnWave(index));
    }

    IEnumerator SpawnWave(int index)
    {
        currentWave = waves[index];

        for (int i = 0; i < currentWave.count; i++)
        {

            if (player == null){
                yield break;
            }

            Enemy randomEnemy = currentWave.enemies[Random.Range(0, currentWave.enemies.Length)];
            Transform randomSpawn = spawnPoints[Random.Range(0, spawnPoints.Length)];
            Instantiate(randomEnemy, randomSpawn.position, randomSpawn.rotation);

            yield return new WaitForSeconds(currentWave.timeBetweenSpawns);



        }
    }

}

[Kurt-Dekker]

Why use a coroutine at all?

When you detect you need more enemies, set an integer called enemiesNeeded to the amount of new enemies you want.

Then in Update, whenever that is nonzero, spawn an enemy and count it down by one.

To space enemy spawnings out, use a cooldown timer.

Cooldown timers, gun bullet intervals, shot spacing, rate of fire:

Fire Rate Issues

This is commonly called a "cooldown timer." You can google for examples and tutorials, but the simplest way is this: have a private float gunHeat; variable In Update(), if that variable is greater than zero, subtract Time.deltaTime from it (this cools down the gunHeat) if (gunHeat > 0) { gunHeat -= Time.deltaTime; } When you go to fire: --- A. only fire if that gunHeat variable is zero or less. --- B. set that variable to the time (in seconds) you want to have between shots. if (Us…

GunHeat (gunheat) spawning shooting rate of fire:

Spawning after amount of time without spamming

Don't use a Timer... that's super overkill. Instead, use just a float. I like to call my float "gunHeat." private float gunHeat; private const float TimeBetweenShots = 0.25f; // seconds Now... in Update(): // cool the gun if (gunHeat > 0) { gunHeat -= Time.deltaTime; } // is the player asking to shoot? if (PlayerAskedToShoot) { // can we shoot yet? if (gunHeat <= 0) { // heat the gun up so we have to wait a bit before shooting again gunHeat = TimeBetweenShots; …

All together it would be something like:

using UnityEngine;

// @kurtdekker

public class SpawnOnDemand : MonoBehaviour
{
    // set this greater than zero when you want more enemies
    public int enemiesToSpawn;

    float spawnCooldown;
    const float spawnInterval = 0.5f;

    void Update ()
    {
        // too soon?
        if (spawnCooldown > 0)
        {
            spawnCooldown -= Time.deltaTime;
            return;
        }

        // any waiting in the pipe?
        if (enemiesToSpawn > 0)
        {
            // TODO / call your Instantiate<T>() here to spawn the enemy

            enemiesToSpawn--;        // count one down

            spawnCooldown = spawnInterval;     // don't make any more for a bit
        }
    }
}