Spawner within range

Questions & Answers
1

I’m looking for a way to have a spawner instantiate enemies when the player is in range, and stop spawning when the player leaves that range. I thought a Coroutine would work, but I’m pretty new at it and with a Coroutine it’s just spawning from the beginning. I also haven’t a single clue how I would get it to stop once the player gets out of range. I’ve tried replacing “while (true)” with “while(targetDistance <= spawnRange)” and removing the if statement from my Start, but no dice.

    GameObject enemyToSpawn;
    Transform enemyParent;
    float spawnTime = 2f;
    Transform target;

    float targetDistance;
    float spawnRange = 10f;

    void Start()
    {
        if (targetDistance <= spawnRange)
        {
            StartCoroutine(SpawnEnemies());
        }
    }

    void Update()
    {
        targetDistance = Vector3.Distance(target.transform.position, gameObject.transform.position);
    }

    IEnumerator SpawnEnemies()
    {
        while (true)
        {
            var enemyWave = Instantiate(enemyToSpawn, transform.position, Quaternion.identity);
            enemyWave.transform.parent = enemyParent;
            yield return new WaitForSeconds(spawnTime);
        }
    }
2

GameObject enemyToSpawn;
Transform enemyParent;
float spawnTime = 2f;
Transform target;

float targetDistance;
float spawnRange = 10f;
float nextSpawnTime = 0;

void Update()
{
    targetDistance = Vector3.Distance(target.transform.position, gameObject.transform.position);
    if (targetDistance <= spawnRange && Time.time > nextSpawnTime)
    {
        SpawnEnemy();
    }
}

void SpawnEnemy()
{
    var enemyWave = Instantiate(enemyToSpawn, transform.position, Quaternion.identity);
    enemyWave.transform.parent = enemyParent;
    nextSpawnTime = Time.time + spawnTime;
}