Enemy Spawning Help (2D Platformer, C#)

Question

Hi, I am going to have multiple spawn points with this script attached. And I want the enemies to spawn after a certain amount of time, but only when the player is in a certain range ("maxDistance"). And not spawn enemies at all when the player is not in that range. This part works, the problem is the when I start the game and after the ("spawnDelay"), It spawns enemies rapidly and doesn't stop. It ignores the ("spawnTime"). Please help me with this.

Script (C#)

 public class Spawner : MonoBehaviour {
 
     public float spawnTime;        // The amount of time between each spawn.
     public float spawnDelay;       // The amount of time before spawning starts.
     public GameObject[] enemies;        // Array of enemy prefabs.
 
     public int maxDistance;
     public Transform target;
     public Transform myTransform;
 
     void Awake()
     {
         myTransform = transform;
     }
 
     void Start()
     {
         GameObject stop = GameObject.FindGameObjectWithTag("Player");
 
         target = stop.transform;
 
         maxDistance = 7;
     }
 
     void FixedUpdate()
     {
         if (Vector3.Distance(target.position, myTransform.position) < maxDistance)
         {
             InvokeRepeating("Spawn", spawnDelay, spawnTime);
         }
     }
 
     void Spawn()
     {
         // Instantiate a random enemy.
         int ZombieIndex = Random.Range(0, enemies.Length);
         Instantiate(enemies[ZombieIndex], transform.position, transform.rotation);   
     }
 }

Answer 1

Found the perfect solution!!! Here is the script if anyone needs it:

 public class Spawner : MonoBehaviour {
 
     public float spawnTime;        // The amount of time between each spawn.
     public float spawnDelay;       // The amount of time before spawning starts.
     public GameObject enemy;
 
     public int maxDistance;
     public Transform target;
     public Transform myTransform;
 
     void Awake()
     {
         myTransform = transform;
 
     }
 
     void Start()
     {
         GameObject stop = GameObject.FindGameObjectWithTag("Player");
 
         target = stop.transform;
 
         maxDistance = 5;
 
         StartCoroutine(SpawnTimeDelay());
     }
 
     IEnumerator SpawnTimeDelay()
     {
         while (true)
             {
                 if (Vector3.Distance(target.position, myTransform.position) < maxDistance)
                 {
                 Instantiate(enemy, transform.position, Quaternion.identity);
                 yield return new WaitForSeconds(spawnTime);
                 }
 
                 if (Vector3.Distance(target.position, myTransform.position) > maxDistance)
                 {
                     yield return null;
                 }                
             }
     }
 }

I had to use a while loop with the WaitForSeconds statement. Thanks for no ones help :P It took me for ever!

Answer 2

Answer by LLIV · May 21, 2016 at 11:29 PM

Instead of using InvokeRepeating just use: Spawn();

0 Show 3 · Share

Ashton-Benedict · May 22, 2016 at 01:32 AM 0

Share

It didn't work, its still spawning enemies rapidly. I replaced

 InvokeRepeating("Spawn", spawnDelay, spawnTime);

with

 Spawn();

Is that what you meant? because it didn't fix it. :/

Ashton-Benedict · May 22, 2016 at 09:07 PM 0

Share

I tried doing something like this. Spawning the enemy if in range and waiting 7 seconds to spawn again, but it didn't work, maybe something like this instead? Please help.

 void FixedUpdate()
     {
         SpawnTimeDelay();
     }
 
     IEnumerator SpawnTimeDelay()
     {
         if (Vector3.Distance(target.position, myTransform.position) < maxDistance)
         {
             Spawn();
             yield return new WaitForSeconds(7);
         }
         else
         {
             yield return null;
         }
     }
 
     void Spawn()
     {
         // Instantiate a random enemy.
         int ZombieIndex = Random.Range(0, enemies.Length);
         Instantiate(enemies[ZombieIndex], transform.position, transform.rotation);
     }
 }

@LLIV

wargreyguy25 · Nov 11, 2016 at 04:30 PM 0

Share

How do i apply the script in green above because even if i apply it because I've been using this tutorial for a project I'm making and have been looking for an enemy spawner but haven't been the right thing i need

been using this tutorial: https://unity3d.com/learn/tutorials/topics/2d-game-creation/creating-basic-platformer-game

Enemy Spawning Help (2D Platformer, C#)

2 Replies

Unity Answers is in Read-Only mode

Follow this Question

Related Questions