How to lock panning camera movement to the Y axis?

Hi, I have an environment for mobile devices that needs to allow players to scroll up and down - with an upper and lower limit.

The only script I have found allows for free movement - panning in every direction.

Could someone please help me out with this? Thanks a lot.

To clarify - I need a new script, or my current script, to allow players to touch move the camera along the Y axis only, but an upper and lower limit.

Current code:

Code (CSharp):

1. Vector3 touchStart;
2.  
3.     void Update()
4.     {
5.         if (Input.GetMouseButtonDown(0))
6.         {
7.             touchStart = Camera.main.ScreenToWorldPoint(Input.mousePosition);
8.         }
9.  
10.        if (Input.GetMouseButton(0))
11.         {
12.             Vector3 direction = touchStart - Camera.main.ScreenToWorldPoint(Input.mousePosition);
13.             Camera.main.transform.position += direction;
14.         }
15.     }

 

Got help elsewhere - this code does the job!

Code (CSharp):

1.     Vector3 touchStart;
2.     public int upperLimit = 0;
3.     public int lowerLimit = 7000;
4.  
5.     void Update()
6.     {
7.         if (Input.GetMouseButtonDown(0))
8.         {
9.             touchStart = Camera.main.ScreenToWorldPoint(Input.mousePosition);
10.         }
11.  
12.         if (Input.GetMouseButton(0))
13.         {
14.             Vector3 direction = touchStart - Camera.main.ScreenToWorldPoint(Input.mousePosition);
15.             float finalYPos = Camera.main.transform.position.y + direction.y;
16.             finalYPos = Mathf.Clamp(finalYPos, lowerLimit, upperLimit);
17.             Camera.main.transform.position = new Vector3(Camera.main.transform.position.x, finalYPos, Camera.main.transform.position.z);
18.             Debug.Log(finalYPos);
19.         }
20.     }