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c# - 统一的敌人波生成器

问题描述

我正在尝试为我正在创建的自上而下的游戏创建一个波浪生成器。我已经创建了 wave spawner 脚本，但是当我点击播放时，什么也没有发生。倒计时没有开始。理想情况下，它应该从 2 开始，一旦达到 0，第一波应该与一个敌人一起生成。一旦那个敌人被杀死，倒计时应该从 5 开始，一旦达到 0，就应该开始下一波有 2 个敌人的波，依此类推。在所有当前敌人被摧毁之前，新一波不应开始。

public enum SpawnState { SPAWNING, WAITING, COUNTING };

public SpawnState state = SpawnState.COUNTING;

public Transform enemy;

public float timeBetweenWaves = 5f;
public float countDown = 2f;

private int waveIndex = 0;

public float searchCountdown = 1f;   

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

  if (countDown <= 0f)
  {          
      if (state != SpawnState.SPAWNING)
      {              
          StartCoroutine(SpawnWave());
          countDown = timeBetweenWaves;
      }
      else
      {              
          countDown -= Time.deltaTime;
      }

  }

}

void WaveCompleted()
{        
    state = SpawnState.COUNTING;
    countDown = timeBetweenWaves;
    SpawnWave();        
}

bool EnemyisAlive()
{        
    searchCountdown -= Time.deltaTime;
    if (searchCountdown <= 0)
    {
        searchCountdown = 1f;
        if (GameObject.FindGameObjectsWithTag("Enemy").Length == 0)
        {
            return false;
        }
    }
    return true;
 }

IEnumerator SpawnWave()
 {        
    state = SpawnState.SPAWNING;
    waveIndex++;
    for (int i = 0; i < waveIndex; i++)
    {
        SpawnEnemy();
        yield return new WaitForSeconds(0.5f);

    }
    state = SpawnState.WAITING;
    yield break;
 }

void SpawnEnemy()
 {
    Instantiate(enemy, transform.position, transform.rotation);
 }

标签： c#unity3d

解决方案

我建议你使用协程来完成所有这些。这使一些事情变得更容易。例如，您可以简单地等到另一个 Ienumertaor 完成。然后我只需将生成的敌人添加到列表中，过滤null条目并使用计数。使用Find或在您的情况下，FindGameObjectsWithTag每个框架的效率都非常低！

using System.Linq;
using System.Collections.Generic;

...

public Transform enemy;

public float timeBetweenWaves = 5f;
public float countDown = 2f;

//public float searchCountdown = 1f; 

private List<Transform> enemies = new List<Transform>();
private int waveIndex = 0;

private void Start()
{
    StartCoroutine(RunSpawner());
}

// this replaces your Update method
private IEnumerator RunSpawner()
{        
    // first time wait 2 seconds
    yield return new WaitForSeconds(countDown);

    // run this routine infinite
    while(true)
    {
        state = SpawnState.SPAWNING;    

        // do the spawning and at the same time wait until it's finished
        yield return SpawnWave();

        state = SpawnState.WAITING;

        // wait until all enemies died (are destroyed)
        yield return new WaitWhile(EnemyisAlive);

        state = SpawnState.COUNTING

        // wait 5 seconds
        yield return new WaitForSeconds(timeBetweenWaves);
    }
}

private bool EnemyisAlive()
{        
    // uses Linq to filter out null (previously detroyed) entries
    enemies = enemies.Where(e => e != null).ToList();

    return enemies.Count > 0;
}

private IEnumerator SpawnWave()
{        
    waveIndex++;
    for (int i = 0; i < waveIndex; i++)
    {
        SpawnEnemy();
        yield return new WaitForSeconds(0.5f);
    }
}

private void SpawnEnemy()
{
    enemies.Add(Instantiate(enemy, transform.position, transform.rotation));
}

为了稍微提高效率，您还可以避免实例化和销毁，而是使用对象池- 仅在需要时启用和禁用对象并最终生成新对象。

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