OK! Sry for the late answer.... but you really should have used the comment button, instead of answer!

This should work:

var scrollDistance:float =100.0;

var scrollSpeed = 1;

function Update(){

    transform.position.x += Input.GetAxis("Horizontal");   

    /*transform.position.y=currentHeight;
    transform.position.z = target.position.z - distance;*/

   if(Mathf.Abs(Camera.main.transform.position.x - transform.position.x) > scrollDistance)

   {

        Camera.main.transform.position.x += scrollSpeed * Mathf.Sign(Camera.main.transform.position.x - transform.position.x);

   }

}

btw... don't forget to press "Correct answer" ;D

THANK YOU VERY MUCH ............. O ya i sorry for not using comment button ...but now I did !!!

yeah... you made it REALLY the right way... you pressed correct answer on you own answer, not on mine.. :/

Hello ..... need help again ... I run your script its working properly but now its constantly following the plane in center....If you will see the Air Strike 3D game its behaving like ... If plane is in center and after some distance say 20 meters to the left then camera also scrolls to the left for the same distance around and then it comes to the distance where camera stops to the extent left but not the plane .... Here its not following the plane in center ... whereas camera moves first ...

I have made this script but dont know its not working ... I have just done for the left for right now Please check

public float scrollDistance = 100.0f; public int scrollSpeed = 1; private float x_Scroll_Left; private float x_Scroll_Right; public float smoothTime = 0.3F; private float yVelocity = 0.0F; private float newPosition;

// Use this for initialization void Start () { MoveAirPlane someScript; someScript = GetComponent();

x_Scroll_Left= (someScript._init_x - someScript._horizontal_extent)/2; x_Scroll_Right = someScript._init_x + someScript._horizontal_extent;

}

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

//Debug.Log("coming ");
if (transform.position.x >= x_Scroll_Left)
{
    //float newPosition = Mathf.SmoothDamp(Camera.main.transform.position.x,(transform.position.x + 100), ref yVelocity, smoothTime);
// Camera.main.transform.position.x += scrollSpeed * Mathf.Sign(Camera.main.transform.position.x - transform.position.x);
// Camera.main.transform.position.x += scrollSpeed * Mathf.Sign(Camera.main.transform.position.x - transform.position.x);
   //float newPosition = Camera.main.transform.position.x  smoothTime;
    newPosition += scrollSpeed * Mathf.Sign(Camera.main.transform.position.x - transform.position.x);
    Camera.main.transform.position = new Vector3(newPosition, Camera.main.transform.position.y, Camera.main.transform.position.z);
   //Camera.main.transform.position = new Vector3(scrollSpeed * transform.position.x,Camera.main.transform.position.y,Camera.main.transform.position.z);
} 

After playing for so much time now I might guess that camera is not following the airplane because Air Plane is moving freely even after camera scrolls without camera being moved .... please help ...thanks in advance