Unity类银河恶魔城学习记录3-3 SkeletonMoveIdle源代码 P49

 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

Enemy.cs

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

public class Enemy : Entity
{
    [Header("Move Info")]
    public float moveSpeed;
    public float idleTime;
    #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();
    }
}

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; }
    #endregion
    protected override void Awake()
    {
        base.Awake();

        idleState = new SkeletonIdleState(this, stateMachine, "Idle", this);
        moveState = new SkeletonMoveState(this,stateMachine, "Move", this);
    }

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

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

EnemyState.cs

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

public class EnemyState
{

    protected Enemy enemyBase;

    protected EnemyStateMachine stateMachine;

    protected bool triggerCalled;

    private string animBoolName;

    protected float stateTimer;


    public EnemyState(Enemy _enemyBase, EnemyStateMachine _stateMachine, string _animBoolName)
    {
        this.enemyBase = _enemyBase;
        this.stateMachine = _stateMachine;
        this.animBoolName = _animBoolName;
    }
    public virtual void Enter()
    {
        triggerCalled = false;
        enemyBase.anim.SetBool(animBoolName, true);
    }
    public virtual void Update()
    {
        stateTimer -= Time.deltaTime;
    }
    public virtual void Exit()
    {
        enemyBase.anim.SetBool(animBoolName, false);
    }

    
}

EnemyStateMachine.cs

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

public class EnemyStateMachine
{
    public EnemyState currentState { get; private set; }//记得加private set，不然很可能会被外部改了
    public void Initialize(EnemyState _startState)
    {
        currentState = _startState;
        currentState.Enter();
    }
    public void ChangeState(EnemyState _newState)
    {
        currentState.Exit();
        currentState = _newState;
        currentState.Enter();
    }
}

SkeletonIdleState.cs

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

public class SkeletonIdleState : EnemyState
{
    private Enemy_Skeleton enemy;//创建独特的Skeleton的类，便于将Skeleton里的东西传过去
    public SkeletonIdleState(Enemy _enemyBase, EnemyStateMachine _stateMachine, string _animBoolName,Enemy_Skeleton _enemy) : base(_enemyBase, _stateMachine, _animBoolName)
    {
        enemy = _enemy;
    }

    public override void Enter()
    {
        base.Enter();
        stateTimer = enemy.idleTime;
    }

    public override void Exit()
    {
        base.Exit();
    }

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

SkeletonMoveState.cs

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

public class SkeletonMoveState : EnemyState
{
    private Enemy_Skeleton enemy;//创建独特的Skeleton的类，便于将Skeleton里的东西传过去
    public SkeletonMoveState(Enemy _enemyBase, EnemyStateMachine _stateMachine, string _animBoolName,Enemy_Skeleton _enemy) : base(_enemyBase, _stateMachine, _animBoolName)
    {
        enemy = _enemy;
    }

    public override void Enter()
    {
        base.Enter();
    }

    public override void Exit()
    {
        base.Exit();
    }

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

        enemy.SetVelocity(enemy.moveSpeed * enemy.facingDir, enemy.rb.velocity.y);

        if(enemy.IsWallDetected()||!enemy.IsGroundDetected())//当撞墙或者没有路的时候翻转
        {
            enemy.Flip();
            stateMachine.ChangeState(enemy.idleState);
        }
    }
}