Unity移动物体碰撞后自动转身移动_unity 一块挡板碰到两边的物体会来回移动

 代码部分：

using UnityEngine;
 
public class enemy_1 : MonoBehaviour
{
    Rigidbody2D rig;
    int dir = 1;
    Transform front;
    void Start()
    {
        rig = GetComponent<Rigidbody2D>();
        front = transform.Find("front");
    }
 
    private void FixedUpdate()//刚体运动放在FixUpdate里
    {
        //定义每秒几米的速度
        rig.velocity = new Vector2(5 * dir, GetComponent<Rigidbody2D>().velocity.y);
 
        //方法一：通过Tag
        Collider2D hit = Physics2D.OverlapPoint(front.position);
        if (hit != null)
        {
            if (hit.tag == "Wall")
            {
                Flip();
            }
        }
 
        //方法二：通过定义碰撞物体的层来实现转身
        //在第六层里碰撞物体tag=Wall时转身
        //Collider2D[] hits = Physics2D.OverlapPointAll(front.position, 1<<6);
        //foreach(var item in hits)
        //{
        //    if (item.tag == "Wall")
        //    {
        //        Flip();
        //        break;
        //    }
        //}
    }
 
    void Flip()
    {
        //利用localScale镜像
        Vector2 v = transform.localScale;
        v.x *= -1;
        transform.localScale = v;
        dir *= -1;
    }
 
    void Update()
    {
        
    }
}