How to get enemies to spawn in certain regions?

Unity Engine
,
1

I’m making a really simple 3D game right now and I’m trying to make it so that enemies will spawn in 3 different regions in my game. My code right now only spawns enemies in a small range but they get stuck in some places where I don’t want them to spawn. How can I fix this issue so that I make them spawn in three specific regions of my map?

Here is my code for my spawn manager so far:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class EnemySpawner : MonoBehaviour
{
[SerializeField] private GameObject enemyPrefab;
[SerializeField] private float enemySpawnInterval = 3.5f;

public GameObject[ ] spawnLocations;
// Start is called before the first frame update
void Start()
{
StartCoroutine(spawnEnemy(enemySpawnInterval, enemyPrefab));
}

private IEnumerator spawnEnemy(float interval, GameObject enemy)
{
yield return new WaitForSeconds(interval);
GameObject newEnemy = Instantiate(enemy, new Vector3(Random.Range(-5f, 5), 0.5f, Random.Range(-5f, 5f)), Quaternion.identity);
StartCoroutine(spawnEnemy(interval, enemy));
}
}

2

Are you using a NavPath?

You could define various spawnPoints.
Then use:

//Choose a random position somewhere inside a circle at spawnPoint with radius spawnAreaRadius
Vector2 random = UnityEngine.Random.insideUnitCircle * 5f;
Vector3 randomSpawnPosition = new Vector3 (spawnPoint.x + random.x, spawnPoint.y, spawnPoint.z + random.y);

Then use:
NavMesh.SamplePosition(randomSpawnPosition, ...)
to find the nearest point on the navMesh closest to randomPoint.

3

Im using Unity 2022 and I don’t have NavPath automatically. How would I get it?