Spawning Enemies after a Player reaches a certain score

Questions & Answers
1

What I have:

  • Predefined (empty game object) spawn points laid out across the top of the playable area
  • Prefab Enemies to be spawned with a y velocity to go downwards upon spawning

What I want to do:

  • When the player reaches a score e.g. 10 points, start spawning the new type of enemies.

The issue:
Enemies aren’t spawning as I expected and I see the print statement in the Update function execute(print (“spawning Top Enemies Now!”):wink: but I don’t see the console logging “hello higher world” so my SpawnTop function isn’t working out for me.

Anything obviously wrong?

using UnityEngine;
using System.Collections;

public class TopEnemySpawnScript : MonoBehaviour {

	public GameObject enemy;                // The enemy prefab to be spawned.
	public Transform[] spawnPoints;         // An array of the spawn points this enemy can spawn from.
	private ScoreTrackScript ScoreTrackScript;
	private bool topSpawnThreshold = false;

	void Start ()
	{
		StartCoroutine("SpawnRoutine"); //Starting a coroutine to be able to wait for specified time
		ScoreTrackScript = GameObject.Find ("ScoreTracker").GetComponent<ScoreTrackScript>();
	}

	void Update()
	{
		if (ScoreTrackScript.getScore () == 2) {
			topSpawnThreshold = true;
			print ("spawning Top Enemies Now!");
		}
	}


	IEnumerator SpawnRoutine()
	{
		yield return new WaitForSeconds(2);
		while (topSpawnThreshold) {
			SpawnTop ();

		}
	}





	void SpawnTop() //Spawns Top Enemies from above the screen after player meets a score threshold
	{
		int spawnPointIndex = Random.Range (0, spawnPoints.Length);
		Instantiate (enemy, spawnPoints [spawnPointIndex].position, spawnPoints [spawnPointIndex].rotation);
		print ("hello higher world");

	}



}
2

At the beginning topSpawnThreshold is false, so the Coroutine will just exit.
You probably want something like this:

IEnumerator SpawnRoutine()
{
  while(true)
  {
     if( topSpawnThreshold) {
         SpawnTop ();
     }
     yield return new WaitForSeconds(2);
  }
}