Unity类银河恶魔城学习记录4-5 P59 EnemyStunnedState源代码

Alex教程每一P的教程原代码加上我自己的理解初步理解写的注释，可供学习Alex教程的人参考
此代码仅为较上一P有所改变的代码

【Unity教程】从0编程制作类银河恶魔城游戏_哔哩哔哩_bilibili

EntityFX.cs

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

public class EntityFX : MonoBehaviour
{
    private SpriteRenderer sr;//定义SR组件来保持要用的组件
    [Header("Flash FX")]
    [SerializeField] private Material hitMat;//要改成的材料
    [SerializeField] private float flashDuration;//闪光的时间
    private Material originalMat;//原来的材料

    private void Start()
    {
        sr = GetComponentInChildren();//从子组件中拿到SR组件
        originalMat = sr.material;//拿到原来的材料

    }
    private IEnumerator FlashFX()//被打后该触发的函数
    {
        sr.material = hitMat;
        yield return new WaitForSeconds(flashDuration);
        sr.material = originalMat;
    } //IEnumertor本质就是将一个函数分块执行，只有满足某些条件才能执行下一段代码，此函数有StartCoroutine调用
    //https://www.zhihu.com/tardis/bd/art/504607545?source_id=1001
    private void RedColorBlink()//使角色闪烁的函数
    {
        if (sr.color != Color.white)
        {
            sr.color = Color.white;
        }
        else
        {
            sr.color = Color.red;
        }
    }
    private void CancelRedBlink()//使角色停止闪烁的函数
    {
        CancelInvoke();//取消该 MonoBehaviour 上的所有 Invoke 调用。
        //https://docs.unity3d.com/cn/current/ScriptReference/MonoBehaviour.CancelInvoke.html
        sr.color = Color.white;
    }
}

Enemy.cs

using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;

public class Enemy : Entity
{
    [Header("Stun Info")]
    public float stunnedDuration;//stunned持续时间
    public Vector2 stunnedDirection;//stunned改变后的速度
    [SerializeField] protected LayerMask whatIsPlayer;
    [Header("Move Info")]
    public float moveSpeed;
    public float idleTime;
    public float battleTime;//多久能从battle状态中退出来
    [Header("Attack Info")]
    public float attackDistance;
    public float attackCooldown;//攻击冷却
    [HideInInspector]public float lastTimeAttacked;//最后一次攻击的时间
    
    #region 类
    public EnemyStateMachine stateMachine;
    
    #endregion

    protected override void Awake()
    {
        base.Awake();
        stateMachine = new EnemyStateMachine();
        
    }
    protected override void Start()
    {
        base.Start();
       
    }


    protected override void Update()
    {
        base.Update();

        stateMachine.currentState.Update();
        
        //Debug.Log(IsPlayerDetected().collider.gameObject.name + "I see");//这串代码会报错，可能使版本的物体，因为在没有找到Player的时候物体是空的，NULL，你想让他在控制台上显示就报错了
    }

    
    public virtual void AnimationFinishTrigger() => stateMachine.currentState.AnimationFinishTrigger();//动画完成时调用的函数，与Player相同
    public virtual RaycastHit2D IsPlayerDetected() => Physics2D.Raycast(wallCheck.position, Vector2.right * facingDir, 7, whatIsPlayer);//用于从射线投射获取信息的结构。
    //该函数的返回值可以变，可以只返回bool，也可以是碰到的结构

    protected override void OnDrawGizmos()
    {
        base.OnDrawGizmos();

        Gizmos.color = Color.yellow;//把线改成黄色
        Gizmos.DrawLine(transform.position, new Vector3(transform.position.x + attackDistance * facingDir, transform.position.y));//用来判别是否进入attackState的线
    }


}

Enemy_Skeleton.cs

using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEditorInternal;
using UnityEngine;

public class Enemy_Skeleton : Enemy
{
    #region 类State
    public SkeletonIdleState idleState { get; private set; }
    public SkeletonMoveState moveState { get; private set; }
    public SkeletonBattleState battleState { get; private set; }
    public SkeletonAttackState attackState { get; private set; }
    public SkeletonStunnedState stunnedState { get; private set; }
    #endregion
    protected override void Awake()
    {
        base.Awake();

        idleState = new SkeletonIdleState(this, stateMachine, "Idle", this);
        moveState = new SkeletonMoveState(this,stateMachine, "Move", this);
        battleState = new SkeletonBattleState(this, stateMachine, "Move", this);
        attackState = new SkeletonAttackState(this, stateMachine, "Attack", this);
        stunnedState = new SkeletonStunnedState(this, stateMachine, "Stunned", this);

    }

    protected override void Start()
    {
        base.Start();
        stateMachine.Initialize(idleState);
    }

    protected override void Update()
    {
        base.Update();
        
        if(Input.GetKeyDown(KeyCode.U))
        {
            stateMachine.ChangeState(stunnedState);//暂时用U来控制进入stunned
        }
    }
}

SkeletonStunnedState.cs

、

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

public class SkeletonStunnedState : EnemyState
{
    private Enemy_Skeleton enemy;
    public SkeletonStunnedState(Enemy _enemyBase, EnemyStateMachine _stateMachine, string _animBoolName,Enemy_Skeleton _enemy) : base(_enemyBase, _stateMachine, _animBoolName)
    {
        enemy = _enemy;
    }

    public override void Enter()
    {
        base.Enter();
        enemy.fx.InvokeRepeating("RedColorBlink", 0, .1f);//在 time 秒后调用 methodName 方法，然后每 repeatRate 秒调用一次。
                                                          //https://docs.unity3d.com/cn/current/ScriptReference/MonoBehaviour.InvokeRepeating.html
        stateTimer = enemy.stunnedDuration;//stunned持续时间
        rb.velocity = new Vector2(-enemy.facingDir*enemy.stunnedDirection.x, enemy.stunnedDirection.y);//stunned改变后的速度，由于SetVelocity有FlipCheck，所有这个用rb.velocity设置速度

    }

    public override void Exit()
    {
        base.Exit();
        enemy.fx.Invoke("CancelRedBlink",0); //在 time 秒后调用 methodName 方法。
        //https://docs.unity3d.com/cn/current/ScriptReference/MonoBehaviour.Invoke.html
    }

    public override void Update()
    {
        base.Update();
        if(stateTimer < 0)
        {
            stateMachine.ChangeState(enemy.idleState);
        }
    }
}