Laser Defender tutorial help

Unity Engine
1

I have tried in various methods, to add 5 waves to my scene with 5 enemies per wave (varying in challenge as you progress) that once destroyed move to the next wave and failed miserably.

Could anyone suggest how I can do this without changing the scene - To keep the health and score?

Really stuck pulling my hair out.

Any help is greatly appreciated.

using UnityEngine;
using System.Collections;
using UnityEngine.SceneManagement;

public class EnemySpawner : MonoBehaviour {

    public GameObject enemyPrefab;
    public float width = 10f;
    public float height = 5f;
    public float speed =5f;
    public float spawnDelay = 0.5f;

    private bool movingRight = true;
    private float xmax;
    private float xmin;
    private LevelManager levelManager;


    // Use this for initialization
    void Start () {

        //Calculate gamespace boundary
        float distanceToCamera = transform.position.z - Camera.main.transform.position.z;
        Vector3 leftBoundary = Camera.main.ViewportToWorldPoint (new Vector3 (0, 0, distanceToCamera));
        Vector3 rightBoundary = Camera.main.ViewportToWorldPoint (new Vector3 (1, 0, distanceToCamera));
        xmax = rightBoundary.x;
        xmin = leftBoundary.x;
        SpawnUntilFull ();
    }

    //Spawn Emenies Function
    void SpawnEnemies(){
            //Get child of EnemyFormation - spawn Enemy underneath Position
            foreach (Transform child in transform) {
                //Enemy Spawner appear in EnemyFormation
                GameObject enemy = Instantiate (enemyPrefab, child.transform.position, Quaternion.identity) as GameObject;
                enemy.transform.parent = child;
            }
    }
    //SpawnUntilFull function
    void SpawnUntilFull(){
        Transform freePosition = NextFreePosition ();
            //Check if free position exists
            if (freePosition) {
                GameObject enemy = Instantiate (enemyPrefab, freePosition.position, Quaternion.identity) as GameObject;
                enemy.transform.parent = freePosition;
            }
            //Delay and only re spawn if position is empty
            if (NextFreePosition ()) {
                Invoke ("SpawnUntilFull", spawnDelay);
            }
    }

    //Width and height of EnemyFormation bounding box
    public void OnDrawGizmos(){
        Gizmos.DrawWireCube(transform.position, new Vector3(width, height, 0));
    }

    // Update is called once per frame
    void Update () {

        //How to move the formation side to side and bouce off the edge of the screen
        if (movingRight) {
            transform.position += Vector3.right * speed * Time.deltaTime;
        }
        else {
            transform.position += Vector3.left * speed * Time.deltaTime;
        }

        //Bounce the bounding box EnemyFormation off the edge og the screen
        float rightEdgeOfFormation = transform.position.x + (0.5f * width);
        float leftOfEdgeOfFormation = transform.position.x - (0.5f * width);
        if (leftOfEdgeOfFormation < xmin) {
            movingRight = true;
        } else if (rightEdgeOfFormation > xmax) {
            movingRight = false;
        }

        //Check for all the enemies present
        if (AllMembersDead ()) {
                //Debug.Log ("Empty Formation");
                //Debug.Log("NEW LEVEL SHOULD LOAD");
                //levelManager.LoadNextLevel();
                //yield return new WaitForSeconds(1.0f);
                //SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex + 1);
                SpawnUntilFull ();
        }
    }

    //Find the next free position for re-spawning
    Transform NextFreePosition(){
        foreach (Transform childPositionGameObject in transform) {
            if (childPositionGameObject.childCount == 0) {
                return childPositionGameObject;
            }
        }
        return null;
    }

    //AllMembersDead function - Check enemies are dead or not
    bool AllMembersDead(){
        foreach (Transform childPositionGameObject in transform) {
            if (childPositionGameObject.childCount > 0) {
                return false;
            }
        }
        return true;
    }
}
2

Keep the enemies in a string array like this:wave1:“1,14,2,5,6” where the numbers the id’s of enemies and then when you do enemies[×].Split(‘,’); you’ll get an array of enemies. then:

variables:
List<GameObject> livingEnemies = new List<GameObject>();
public int waveCount;
int currentWave = 0; //can be public to see where the game is

in coroutine:
while game is running:

if livingEnemies.Count == 0 then:
   string[] enemyIds = enemies[currentWave].split(',');
   for (int n = 0; n < enemyIds.Length; n++)
      enemy = CreateEnemy(int.Parse(enemyIds[n]));
      livingEnemies.Add(enemy)
      yield new WaitForSeconds(1);
   endfor
endif
yield return null;
end


CreateEnemy (int id):
instantiate enemy somehow from array or list

Only thing to do, is to delete the enemy from the list if it dies

PS:
works with a simple int counter instead of a list of living enemies, might be easier to handle

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