在Unity 2d池游戏中将对象命向MousePosition

Question

我正在Unity制作2D游戏，我无法在游戏中向鼠标位置击球！当用户指示鼠标朝向击球时，它应该像通常的水池游戏一样击中它。

这是我的C＃代码：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class whiteBall : MonoBehaviour {

    Rigidbody2D rb;
    int speed;
    public GameObject ball;
    public GameObject cue;

    Vector3 mousePos;

    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
        speed = 10;
    }

    void OnCollisionEnter2D(Collision2D collision)
    {
        if(collision.gameObject.tag == "pockets")
        {
            Debug.Log("Game collision with pockets");
        }
    }

    void Update()
    {       
        hitBall();

        mousePos = Input.mousePosition;

        // mouse move cordianates
        Vector3 objectPos = Camera.main.WorldToScreenPoint(transform.position);
        mousePos.x = mousePos.x - objectPos.x;
        mousePos.y = mousePos.y - objectPos.y;

        float angle = Mathf.Atan2(mousePos.y, mousePos.x) * Mathf.Rad2Deg;
        transform.rotation = Quaternion.Euler(new Vector3(0,0,angle));
    }

    public void hitBall()
    {
        if(Input.GetMouseButtonUp(0))
        {
            Vector2 newPos = new Vector2(Mathf.Abs(mousePos.x), Mathf.Abs(mousePos.y));

            rb.AddForce(newPos * 20 * Time.deltaTime, ForceMode2D.Impulse);
            Debug.Log(newPos);
        }
    }
}