using System.Collections;using System.Collections.Generic;using UnityEngine;public class Look2D : MonoBehaviour {    [SerializeField]    private Transform _targetPos;    private void Update()    {        transform.eulerAngles = LookTargetAngle(transform, _targetPos.position);    }    public Vector3 LookTargetAngle(Transform playerTrans, Vector3 targetPos)    {               float dx = targetPos.x - playerTrans.transform.position.x;        float dy = targetPos.y - playerTrans.transform.position.y;        float rotationZ = Mathf.Atan2(dy, dx) * 180 / Mathf.PI;        //得到最终的角度并且确保在 [0, 360) 这个区间内        rotationZ -= 90;        //获取增加的角度        float originRotationZ = playerTrans.eulerAngles.z;        float addRotationZ = rotationZ - originRotationZ;        //超过 180 度需要修改为负方向的角度        if (addRotationZ > 180)        {            addRotationZ -= 360;        }        //应用旋转        return new Vector3(0, 0, playerTrans.eulerAngles.z + addRotationZ);    }}