自上而下2d 4方向ai

Question

您好我正在尝试使用unity和csharp为我的游戏创建一个ai 我不知道该如何去做我想让ai向4个方向移动，所以如果玩家是对角线，那么它会向下移动然后离开等等

这是我尝试过的，但只有当我移动并且它向左或向右倾斜时才会移动

void OnTriggerStay2D(Collider2D other) 
{
    if (other.CompareTag("Player"))
    {
        if (transform.position.y < other.gameObject.transform.position.y)
        {
            rigidbody2D.transform.position += Vector3.up * speed * Time.deltaTime;
            anim.SetBool ("Backwards", true);
        }
        if (transform.position.y > other.gameObject.transform.position.y)
        {
            rigidbody2D.transform.position += Vector3.down * speed * Time.deltaTime;
            anim.SetBool ("Front", true);
        }


        if (transform.position.x > other.gameObject.transform.position.x)
        {
            rigidbody2D.transform.position += Vector3.left * speed * Time.deltaTime;
            anim.SetBool ("Left", true);
        }
        if (transform.position.x > other.gameObject.transform.position.x)
        {
            rigidbody2D.transform.position += Vector3.right * speed * Time.deltaTime;
            anim.SetBool ("RIght", true);
        }
    }
}