Unity2d：敌人不会在随机生成点生成

Question

在统一中，我希望游戏开始时敌人会在随机生成点生成（我在游戏中制作了 3 个重生点）但敌人没有在其中一个重生点重生。

我做错了什么？

这是我的代码：

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

Random.Range returns 包含范围值，因此 0 到 5 可以包含 0 和 5。

数组索引是从零开始的，因此具有 5 个元素的数组将具有 0 到 4。

所以在你调用 SpawnEnemy 方法时

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

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

改成

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

应该可以解决您的问题。

Answer 2

也许尝试改变

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

类似于

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

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