As the title says, I want to increase my enemy hp after every wave, however after wave 1 i get "IndexOutOfRangeException: Index was outside the bounds of the array." error
note: i'm still a beginner and this is the first project i'm working on, i followed a tutorial for this script (i wrote some stuff myself too)
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;
public class WaveSpawner : MonoBehaviour
{
public enum SpawnState { SPAWNING, WAITING, COUNTING };
public int waveNumber = 0;
[SerializeField] public TMP_Text waveNumberTextValue;
public bool waveEnded = false;
[System.Serializable]
public class Wave
{
public string name;
public Transform enemy;
public int count;
public float rate;
}
public Wave[] waves;
private int nextWave = 0;
public Transform[] spawnPoints;
public float timeBetweenWaves = 5f;
private float waveCountdown;
private float searchCountdown = 1f;
private SpawnState state = SpawnState.COUNTING;
void Start()
{
waveNumber = 1;
waveCountdown = timeBetweenWaves;
}
public void EnemyHpIncrease()
{
if (waveEnded == true)
{
if(waveNumber <= 10)
{
FindObjectsOfType<EnemyHealth>()[0].enemyHealth += 100f;
}
else
{
FindObjectsOfType<EnemyHealth>()[0].enemyHealth *= 1.1f;
}
}
}
void Update()
{
waveNumberTextValue.text = "Wave " + waveNumber.ToString("0");
if(state == SpawnState.WAITING)
{
if(!EnemyIsAlive())
{
WaveCompleted();
Debug.Log("hp increased by 100hp");
waveEnded = true;
waveNumber++;
}
else
{
return;
}
}
if(waveCountdown <= 0)
{
if(state != SpawnState.SPAWNING)
{
StartCoroutine(SpawnWave(waves[nextWave]));
}
}
else
{
waveCountdown -= Time.deltaTime;
}
}
public void WaveCompleted()
{
waveEnded = true;
EnemyHpIncrease();
state = SpawnState.COUNTING;
waveCountdown = timeBetweenWaves;
if(nextWave + 1 > waves.Length - 1)
{
nextWave = 0;
Debug.Log("ALL WAVES COMPLETED!");
}
else
{
nextWave++;
}
}
bool EnemyIsAlive()
{
searchCountdown -= Time.deltaTime;
if(searchCountdown <= 0f)
{
searchCountdown = 1f;
if(GameObject.FindGameObjectWithTag("Enemy") == null)
{
return false;
}
}
return true;
}
IEnumerator SpawnWave (Wave _wave)
{
Debug.Log("Spawning Wave" + _wave.name);
state = SpawnState.SPAWNING;
waveEnded = false;
for (int i = 0; i < _wave.count; i++)
{
SpawnEnemy(_wave.enemy);
yield return new WaitForSeconds( 1f/_wave.rate );
}
state = SpawnState.WAITING;
yield break;
}
void SpawnEnemy(Transform _enemy)
{
Debug.Log("Spawning Enemy" + _enemy.name);
Transform _sp = spawnPoints[Random.Range(0, spawnPoints.Length)];
Instantiate (_enemy, _sp.position, _sp.rotation);
}
}
i tried putting debug.log everywhere and it doesnt show anymore after WaveCompleted(); in
WaveCompleted();
Debug.Log("hp increased by 100hp");
waveEnded = true;
waveNumber++;
errors:
IndexOutOfRangeException: Index was outside the bounds of the array.
WaveSpawner.EnemyHpIncrease () (at Assets/scripts/WaveSpawner.cs:48)
WaveSpawner.WaveCompleted () (at Assets/scripts/WaveSpawner.cs:93)
WaveSpawner.Update () (at Assets/scripts/WaveSpawner.cs:65)
The IndexOutOfRangeException is on line 48:
IndexOutOfRangeException: Index was outside the bounds of the array.
WaveSpawner.EnemyHpIncrease () (at Assets/scripts/WaveSpawner.cs:48) <-- line number here
Copying your code into Notepad++, line 48 appears to be the following:
FindObjectsOfType<EnemyHealth>()[0].enemyHealth += 100f;
The code is assuming that the result of the FindObjectsOfType<> method is returning an array with at least one element. I assume that the result in this case is an empty array, so there is no element at position 0.
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