Trouble getting variables from cloned scripts.

Questions & Answers
1

Making a simple pong clone but I cannot get the CPU paddle to follow the ball. I am having this issue because the paddle refuses to see the script/variable in the cloned ball (It will work if I set the ball to start on screen but will stop functioning once the ball respawns. Please help.

using UnityEngine;
using System.Collections;

public class BallScript : MonoBehaviour {
    public AudioSource blip;
    public Caller other;
    public float ballx;
    

	// Use this for initialization
	void Start () {

        rigidbody.AddForce(0, -150.0f, 0);
	
	}
	
	// Update is called once per frame
	void Update () {
        ballx = gameObject.transform.position.x;

        if (gameObject.transform.position.y <= -1.0f) {

            Destroy(gameObject);
            other.ContinueSpawn();
        
        }

        if (gameObject.transform.position.y >= 20.0f) {

            Destroy(gameObject);
            other.ContinueSpawn();
        
        }

	
	}
    void OnCollisionEnter(Collision Collision)
    {
        this.audio.Play();
        rigidbody.velocity = rigidbody.velocity * 1.1f;

    }
}

And the paddle script.

enter code hereusing UnityEngine;
using System.Collections;

public class CpuPaddle : MonoBehaviour {

    public BallScript other;
    public float ballx;

	// Use this for initialization
	void Start () {

	
	}
	
	// Update is called once per frame
	void Update () {

        other.GetComponent<BallScript>();
        ballx = other.ballx;
        if (ballx < gameObject.transform.position.x)
        {

            transform.Translate(-10f * Time.deltaTime, 0, 0);


        }
        if (ballx > gameObject.transform.position.x)
        {

            transform.Translate(10f * Time.deltaTime, 0, 0);


        }

        


         }
	
	
}

Thanks guys.

2

The destroyed ball and the instantiated ball are two different gameObjects. Therefore the cpu paddle can’t possibly carry over the reference to it.

You can either have it look for a new ball when the old was destroyed (rough code, requires some more setup):

if(other == null)
other = GameObject.FindWithTag("Ball");

Or instead of destroying the old ball just reuse it:

void RespawnMe(){
    transform.position = startposition;
    rigidbody.velocity = Vector3.zero;
    rigidbody.AddForce(0, -150.0f, 0);
}
3

At the end of the day, this is how it all got fixed. Thanks Lockstep for putting me in the right direction.

using UnityEngine;
using System.Collections;

public class CpuPaddle : MonoBehaviour {
    public GameObject other;
    
    public float ballx;

	// Use this for initialization
	void Start () {

	
	}
	
	// Update is called once per frame
	void Update () {
        if (other == null) {

            other = GameObject.FindWithTag("ball");
            Debug.Log("ball aquired");
            
        
        }
       ballx = other.GetComponent<BallScript>().ballx;
       
        
        if (ballx < gameObject.transform.position.x)
        {

            transform.Translate(-10f * Time.deltaTime, 0, 0);


        }
        if (ballx > gameObject.transform.position.x)
        {

            transform.Translate(10f * Time.deltaTime, 0, 0);


        }

        


         }



   
}