怪物ai巡逻和闲置答案

【问题标题】：monster ai patrol and idle怪物ai巡逻和闲置
【发布时间】：2019-09-07 14:21:54
【问题描述】：

我正在用怪物（RPG）制作游戏，我想做的是怪物左右移动（巡逻），等待一段时间后它会静止不动（空闲）。所以一开始就是怪物：

移动 5 秒，
然后变为空闲，在空闲 3 秒后，
它又动了

这个过程一次又一次地无限重复，我写的代码只是每1秒不停地改变Idle和Patrol，我不知道，希望你能帮我弄清楚，谢谢！

`using System.Collections; 
using System.Collections.Generic; 
using UnityEngine;

public class MonsterMove : MonoBehaviour { [SerializeField] private float 
MinPatrolTime, MaxPatrolTime, MinIdleTime, MaxIdleTime; [SerializeField] 
private bool ShouldBeIdle=false; public float MonsterMoveSpeed; public 
float Distance=2f; [SerializeField] private bool ShouldBePatroling = 
true; private bool MovingRight = true;

public Transform groundDetection;
private void Start()
{
}
private void Update()
{

}
 void FixedUpdate()
{
    if (ShouldBePatroling&&!ShouldBeIdle)
 {
     Move();
     StartCoroutine(PatrolTime());
 }
 else if (ShouldBeIdle==true&&!ShouldBePatroling) { //Idle Anim
     Debug.Log("Doing Idle Anim");
     StartCoroutine(IdleTime());
 }

 }
 void Move()
 {
 transform.Translate(Vector2.right * MonsterMoveSpeed * Time.deltaTime);
 int layer_mask1 = LayerMask.GetMask("Ground");
 RaycastHit2D groundInfo = Physics2D.Raycast(groundDetection.position, 
 Vector2.down, Distance, layer_mask1);
 if (groundInfo.collider == false)
 {
     if (MovingRight == true)
     {
         transform.eulerAngles = new Vector3(0, -180, 0);
         MovingRight = false;
     }
     else
     {
         transform.eulerAngles = new Vector3(0, 0, 0);
         MovingRight = true;
     }
     }
  }
   IEnumerator PatrolTime()
 {
 yield return new WaitForSeconds(Random.Range(MinPatrolTime, 
 MaxPatrolTime));
 ShouldBePatroling = false;
 ShouldBeIdle = true;
 }
  IEnumerator IdleTime()
 {
 yield return new WaitForSeconds(Random.Range(MinIdleTime, MaxIdleTime));
 ShouldBePatroling = true;
 ShouldBeIdle = false;`
 }

【问题讨论】：

标签： c# unity3d animation artificial-intelligence

【解决方案1】：

在你FixedUpdate 中，即使已经启动的协程仍在运行，你也在启动协程，从而弄乱了你的状态变量。您可以引入更多状态变量来检查怪物当前是否已经移动/空闲，因此不需要启动协程。如果您使用enum 而不是多个bools（请参阅state pattern），则可能如下所示：

public class MonsterMove : MonoBehaviour
{
    ...

    protected enum State
    {
        Idle,
        StartPatrolling,
        Patrolling,
        StopPatrolling,
    }
    protected State state = State.StartPatrolling;

    ...

    void FixedUpdate()
    {
        switch (state)
        {
            case State.StartPatrolling:
                {
                    StartCoroutine(PatrolTime());
                    state = State.Patrolling;
                    break;
                }
            case State.StopPatrolling:
                {
                    StartCoroutine(IdleTime());
                    state = State.Idle;
                    break;
                }
            case State.Patrolling:
                {
                    Move();
                    break;
                }
            case State.Idle:
                {
                    // nothing to be done
                    break;
                }
        }
    }

    ...

    IEnumerator PatrolTime()
    {
        yield return new WaitForSeconds(Random.Range(MinPatrolTime, MaxPatrolTime));
        state = State.StopPatrolling;
    }

    IEnumerator IdleTime()
    {
        yield return new WaitForSeconds(Random.Range(MinIdleTime, MaxIdleTime));
        state = State.StartPatrolling;
    }
}

此外，当没有碰撞时，您似乎会在 Move 方法中切换方向，而在发生碰撞时您可能希望更改为（参见 docs）：

if (groundInfo.collider != null)

【讨论】：