Unity2d:敌人不会在随机产卵点产生

Question

为了统一，我希望当游戏开始时，敌人在一个随机的产卵点产卵(我在游戏中制作了3个产卵点)，但敌人不会在其中一个点产卵。

我做错什么了？

下面是我的代码：

使用UnityEngine；使用System.Collections；

public class WaveSpawner : MonoBehaviour {

public enum Spawnstate {SPAWNING, WAITING, COUNTING };

[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 float timeBetweenWaves = 5f;
public float waveCountdown;

public Transform[] spawnPoints;

private float searchCountdown = 1f;

private Spawnstate state = Spawnstate.COUNTING;

void Start()
{
    if (spawnPoints.Length == 0)
    {
        Debug.LogError("No spawn points referenced");
    }
    waveCountdown = timeBetweenWaves;
}

void Update()
{
    if(state == Spawnstate.WAITING)
    {
        if(!EnemyIsAlive())
        {
            WaveCompleted();
        }
        else
        {
            return;
        }
    }

    if(waveCountdown <= 0)

    {
        if(state != Spawnstate.SPAWNING)
        {
            StartCoroutine(SpawnWave(waves[nextWave]));
        }

    }
    else
    {
        waveCountdown -= Time.deltaTime;
    }
}

void WaveCompleted()

{
    Debug.Log("Wave Completed!");

    state = Spawnstate.COUNTING;
    waveCountdown = timeBetweenWaves;

    if (nextWave + 1 > waves.Length - 1)

    {
        nextWave = 0;
        Debug.Log("Completed all waves!");
    }

    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;

    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, transform.position, transform.rotation);

}
}

​

​

Answer 1

也许试着去改变

Transform _sp = spawnPoints[ Random.Range (0, spawnPoints.Length) ];
Instantiate(_enemy, transform.position, transform.rotation);

类似这样的东西

Transform _sp = spawnPoints[ Random.Range (0, spawnPoints.Length-1) ];
Instantiate(_enemy, _sp.position, _sp.rotation);

Answer 2

Random.Range返回包含范围的值，因此0到5可以包括0和5。

数组索引是从零开始的，因此具有5个元素的数组将有0到4个元素。

因此，在SpawnEnemy方法中，当您调用

spawnPoints[ Random.Range (0, spawnPoints.Length) ]

如果Random.Range提供spawnPoints.Length，它将失败。

将其更改为

spawnPoints[ Random.Range (0, spawnPoints.Length-1) ]

应该能解决你的问题。