Unity breakout游戏使用c#根据球拍的哪一部分发生碰撞来改变球的方向

using UnityEngine;

public class BallController : MonoBehaviour
{
    public GameObject paddle; // 球拍对象
    public float speed = 5f; // 球的速度

    private Rigidbody2D rb;
    private Vector2 direction;

    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
        direction = new Vector2(1, 1).normalized; // 初始方向
    }

    void Update()
    {
        rb.velocity = direction * speed;
    }

    void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.gameObject == paddle)
        {
            ContactPoint2D contact = collision.GetContact(0);
            float relativeIntersectX = (transform.position.x - paddle.transform.position.x) / (paddle.GetComponent<Renderer>().bounds.size.x / 2);

            direction.x = Mathf.Sign(relativeIntersectX);
            direction.y = Mathf.Abs(relativeIntersectX) > 0.5f ? -Mathf.Sign(relativeIntersectX) : direction.y;
        }
    }
}