unity2d检测是否碰撞

 public float x_power = 0.0f;
    public float y_power = 100.0f;

    private Rigidbody2D rb2D;

    

    void Start()
    {
        rb2D = gameObject.GetComponent();
    }

 

    void Update()
    {
        
    }

    private void FixedUpdate()
    {
        if (Input.GetMouseButtonDown(0))
        {
            Vector2 x_force = new Vector2(x_power, y_power);
            rb2D.AddForce(x_force);
        }
    }

    //检测是否碰撞
    private void OnCollisionEnter2D(Collision2D collision)
    {
        UnityEngine.Debug.Log(collision.gameObject);
        //是否存在刚体
        if (collision.rigidbody)
        {
            collision.rigidbody.AddForce(new Vector2(0.0f, 200.0f));
        }
    }