通常对俯视角2d游戏的角色移动我们使用简单2d混合树的方式,但是其不移动时的朝向该如何定义？

        十分简单：移动和不移动之间形成逻辑自锁

       详细说明思路就是再创建一个简单2d混合树 定义其N方向的idle 并用lastDirc二维向量保存玩家输入，当玩家输入为0时，就不进改变lastDirc的函数块，用该变量去改变idle混合树状态即可

请看整体代码

using System;
using UnityEngine;

[Serializable]
public class PlayerCtrl : MonoBehaviour {
    private static PlayerCtrl instance;
    public static PlayerCtrl Instance => instance;
     
    public Vector2 moveDir;
    public Vector2 lastDir;
    [SerializeField]
    private float moveSpeed;
    public Rigidbody2D playerRb;
   
    private void Awake() {
        if (instance == null){ 
            instance = this;
        }else{ 
            Destroy(instance);
        }
        playerRb = GetComponent<Rigidbody2D>();
    }

    void Start() {
        moveSpeed = 0.1f;
    }

    void Update() {

        GetInput();
    }

    private void FixedUpdate() {
        FixedMove();
    }
    public void GetInput(){
        moveDir = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"));
    }
    private void FixedMove() {
        playerRb.MovePosition((Vector2)this.playerRb.position + moveDir.normalized * moveSpeed);
    }
}

using UnityEngine;

public class PlayerAm : MonoBehaviour
{  
    private Animator playerAm;
    private void Awake() {
        playerAm = GetComponent<Animator>();
    }
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        PlayerAmCtrl();
    }
    public void PlayerAmCtrl(){

        if (PlayerCtrl.Instance.moveDir != Vector2.zero) {
            PlayerCtrl.Instance.lastDir = PlayerCtrl.Instance.moveDir;
            playerAm.SetBool("isMoving", true);
            playerAm.SetFloat("X", PlayerCtrl.Instance.moveDir.x);
            playerAm.SetFloat("Y", PlayerCtrl.Instance.moveDir.y);
        }
        else {
            playerAm.SetBool("isMoving", false);
            playerAm.SetFloat("Ix", PlayerCtrl.Instance.lastDir.x);
            playerAm.SetFloat("Iy", PlayerCtrl.Instance.lastDir.y);
        }
    }
}

        为什么这么简单的事情还需要记录呢？？

        因为我一直在寻找不这么做就可以解决的方式，但是似乎涉及到了这个2d简单混合树后再只想通过代码去解决是很难的

        如果是简单的一维向量锁方向就行了，希望大佬看到此篇后有更加简单的方法私信我