AI won't move the right way

I've been working on this Proximity AI script for a few weeks now, I have been tweaking and improving by asking for help and finally the script has no compiler errors and works without any issues. However the AI object I assigned the script to, doesn't move forward towards the ball but instead moves away from it as the ball gets near it. What can I do to fix this?

Code (CSharp):

1.  
2. public class Opponent : MonoBehaviour {
3.  
4. public GameObject Ball;
5. public float range;
6. public float speed;
7. Rigidbody rb;
8.  
9. void Start()
10. {
11. rb=GetComponent<Rigidbody>();
12. }
13.  
14. void Update()
15. {
16.  
17. range = Vector3.Distance(Ball.transform.position, transform.position);
18.  
19. if (range < 40)
20. {
21. transform.LookAt(Ball.transform.position);
22. }
23.  
24. if (range < 30 && range > 15)
25. {
26. rb.AddForce(Vector3.forward*25*speed);
27. }
28. }
29. }
30.  

This is the code I've been working on, any suggestions on how to fix the problem will be great. Thanks

 

I think this line is your problem:

Code (CSharp):

1. rb.AddForce(Vector3.forward*25*speed);

You're moving your AI in the world's forward direction which won't change. You want your AI's local forward which will change as it rotates.

Try this instead:

Code (CSharp):

1. rb.AddForce(transform.forward*25*speed);

 

I've tried that but the AI still moves away from the ball instead of towards it.

 

Try with

Code (CSharp):

1. rb.AddForce((Ball.transform.position - transform.position).normalized*25*speed)

 

Guistitia's answer should work, but also make sure that the blue z-axis is pointing in the forward direction on your AI game object. It sounds like it's probably pointing behind your AI.