[solved]advanced Wave Spawner

Unity Engine
1

I am trying to modify this script to accept multiple types of enemies in one wave. So far I can select multiple enemies and assign prefabs to them but I get this error:
Assets/Scripts/WaveSpawner.cs(10,28): warning CS0649: Field WaveSpawner.enemies' is never assigned to, and will always have its default value null’
and this error when I run the game:
NullReferenceException: Object reference not set to an instance of an object
WaveSpawner+c__Iterator0.MoveNext () (at Assets/Scripts/WaveSpawner.cs:81)
UnityEngine.SetupCoroutine.InvokeMoveNext (IEnumerator enumerator, IntPtr returnValueAddress) (at C:/buildslave/unity/build/Runtime/Export/Coroutines.cs:17)

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class WaveSpawner : MonoBehaviour {

    public static int EnemiesAlive = 0;

    public Wave[] waves;
    private EnemyBlueprint enemies;
  
    public Transform spawnPoint;

    public float timeBetweenWaves = 5f;
    public float countdown = 2f;

    //public float timeBetweenEnemies = 0.5f;

    public Text waveCountdownText;
    public Text wavesText;

    private int waveIndex = 0;
    //private int enemyIndex = 0;

    private void Update()
    {
        if(EnemiesAlive > 0)
        {
            return;
        }

        if(countdown <= 0f)
        {
            StartCoroutine(SpawnWave());
            countdown = timeBetweenWaves;
            return;
        }

        countdown -= Time.deltaTime;

        countdown = Mathf.Clamp(countdown, 0f, Mathf.Infinity);

        waveCountdownText.text = string.Format("{0:00.00}", countdown);

        wavesText.text = (waveIndex + 1) + "/" + waves.Length;
    }

    //IEnumerator SpawnWave()
    //{
    //    //Debug.Log("Wave Incoming");

    //    Wave wave = waves[waveIndex];

    //    for (int i = 0; i < wave.count; i++)
    //    {
    //        SpawnEnemy(wave.enemy);
    //        yield return new WaitForSeconds(1f / wave.rate);
    //    }

    //    waveIndex++;
    //    PlayerStats.Rounds++;

    //    if(waveIndex == waves.Length)
    //    {
    //        Debug.Log("LEVEL WON!");
    //        this.enabled = false;
    //    }
    //}

    IEnumerator SpawnWave()
    {
        //Debug.Log("Wave Incoming");
      
        Wave wave = waves[waveIndex];
        //EnemyBlueprint eb = enemies[enemyIndex];

        for (int a = 0; a < wave.waveCount; a++)
        {
            yield return new WaitForSeconds(1f / wave.waveRate);

            for (int i = 0; i < enemies.enemyCount; i++)
            {
                SpawnEnemy(enemies.enemy);
                yield return new WaitForSeconds(1f / enemies.enemyRate);
            }
        }

        waveIndex++;
        PlayerStats.Rounds++;

        if (waveIndex == waves.Length)
        {
            Debug.Log("LEVEL WON!");
            this.enabled = false;
        }
    }

    void SpawnEnemy(GameObject enemy)
    {
        Instantiate(enemy, spawnPoint.position, spawnPoint.rotation);
        EnemiesAlive++;
    }

    //void DestroyEnemyOnTargetReach()
    //{
    //    Destroy(gameObject);
    //}
}

using System.Collections.Generic;
using UnityEngine;

[System.Serializable]
public class Wave {

    public EnemyBlueprint[] enemyWave;
    public int waveCount;
    public float waveRate;

}

using UnityEngine;

[System.Serializable]
public class EnemyBlueprint {

    public GameObject enemy;
    public int enemyCount;
    public float enemyRate;
}
2

private EnemyBlueprint enemies; change it with public EnemyBlueprint enemies;
and set variables on inspector

3

that dose not help me as I want to use enemies as a reference to enemy, enemyCount and enemyRate. setting in inspector make it to spwan only 2 enemies of the set prefab. I want them to be part of the wave but I don’t seem to find a way to reference it

4

http://answers.unity.com/comments/1620378/view.html this is what I was looking for.
my IEnumerator look like this now:

IEnumerator SpawnWave()
    {
        //Debug.Log("Wave Incoming");
     
        Wave wave = waves[waveIndex];

        for (int a = 0; a < wave.waveCount; ++a)
        {
            yield return new WaitForSeconds(1f / wave.waveRate);

            for (int i = 0; i < wave.enemyWave.Length; i++)
            {
                for (int j = 0; j < wave.enemyWave[i].enemyCount; ++j)
                {
                    SpawnEnemy(wave.enemyWave[i].enemy);
                    yield return new WaitForSeconds(1f / wave.enemyWave[i].enemyRate);
                }
            }

        waveIndex++;
        PlayerStats.Rounds++;
    }

        }