Question about this script,

Unity Engine
1

Hello everyone
I have a script to spawn the enemy, how can I get it to increase the spawn over time? and also not exceeding certain amount? if there’s any tutorial or anyone can help would be great

here’s the code.

using UnityEngine;
using System.Collections;

public class EnemySpawningScript : MonoBehaviour {
   
    public GameObject [] enemies;
    int enemyNo;
    public float maxPos = 2.5f;
    public float delayTimer = 0.5f;
    float timer;
   
    void Start () {
        timer = delayTimer;
       
    }
   
    void Update () {
       
        timer -= Time.deltaTime;
        if (timer <=0)
        {
            Vector3 enemyPos = new Vector3(Random.Range(-2.8f, 2.8f), transform.position.y, transform.position.z);
            enemyNo = Random.Range (0,28);
            Instantiate (enemies[enemyNo], enemyPos, transform.rotation);
            timer = delayTimer;
        }
    }
}
2

I’ve never done this but my immediate thought would be to do something like (note, out-of-head and untested):

using UnityEngine;
using System.Collections;

public class EnemySpawningScript : MonoBehaviour {
  
    public GameObject [] enemies;
    int enemyNo;
    public float maxPos = 2.5f;
    private float lastSpawnTime;
    private float spawnDelay = 5f; // starting spawn delay, once every 5 second
    private float minSpawnDelay = 0.5f; // min delay between spawns, currently 2 times per second
    private float spawnDelayAdjustmentFactor = 0.9f; // value to multiply the spawnDelay each time.

    //
    // Note the spawnDelayAdjustmentFactor could be a value that you subtract from the spawnDelay
    // instead of multiplying - it just depends on how you want it to behave.
    //
  
    void Start () {
        lastSpawnTime = 0;//Time.time;      
    }
  
    void Update () {
      
        float timeSinceLastSpawn = Time.time - lastSpawnTime;
        if (timeSinceLastSpawn >= spawnDelay)
        {
            lastSpawnTime = Time.time;

            if(spawnDelay > minSpawnDelay)
            {
                spawnDelay = spawnDelay * spawnDelayAdjustmentFactor;
                if(spawnDelay < minSpawnDelay)
                {
                     spawnDelay = minSpawnDelay;
                }
            }

            Vector3 enemyPos = new Vector3(Random.Range(-2.8f, 2.8f), transform.position.y, transform.position.z);
            enemyNo = Random.Range (0,28);
            Instantiate (enemies[enemyNo], enemyPos, transform.rotation);            
        }
    }
}
1 Like
3

Gonna try it and be with you thanks a bunch in advance!!

4

Thank you very much for you help really appreciated but I’m really bad with math, which is why I’m not sure if what I did was right, I wanted to reduce the spawn time every a min and a half by 1 second until it goes down to a second and half per spawn won’t go below that so I did this to your adjustment on my script not sure if that’s right though can you have a look ?

using UnityEngine;
using System.Collections;

public class SpawningTimerForIncreasingSpawnRate : MonoBehaviour {

       
    public GameObject [] enemies;
    int enemyNo;
    public float maxPos = 2.5f;
    private float lastSpawnTime;
    private float spawnDelay = 3f; // starting spawn delay, once every 5 second
    private float minSpawnDelay = 90f; // min delay between spawns, currently 2 times per second
    private float spawnDelayAdjustmentFactor = 0.1f; // value to multiply the spawnDelay each time.
       
        //
        // Note the spawnDelayAdjustmentFactor could be a value that you subtract from the spawnDelay
        // instead of multiplying - it just depends on how you want it to behave.
        //
       
    void Start ()
    {
        lastSpawnTime = 0;//Time.time;     
    }
       

    void Update ()
    {
           
        float timeSinceLastSpawn = Time.time - lastSpawnTime;
        if (timeSinceLastSpawn >= spawnDelay)
            {
            lastSpawnTime = Time.time;
               
            if(spawnDelay > minSpawnDelay)
            {
                spawnDelay = spawnDelay - spawnDelayAdjustmentFactor;
                if(spawnDelay < minSpawnDelay)
                {
                    spawnDelay = minSpawnDelay;
                }
            }

                Vector3 enemyPos = new Vector3(Random.Range(-2.8f, 2.8f), transform.position.y, transform.position.z);
                enemyNo = Random.Range (0,27);
                Instantiate (enemies[enemyNo], enemyPos, transform.rotation);           
            }
        }
    }

Thanks again.