moving camera in increments, with Touch

Hello All,

I am controlling a camera with arrow Keys (up, down left, right) in jumps of 10 units, each time you press.

I am making this for touchscreen and also want the touch input to snap to stages along both the X & Y axis.

Almost like the Camera was on a lattice and could only move in steps on the X,Y ... Like when you move checkers

The Arrow keys work, but the touch does all over the board.

Thanks, Here's the javascript:

 #pragma strict
 
 // Moves object according to finger movement on the screen
 
     var speed : float = 0.05;
     var nonSpeed : float = 0;
     
     function Update () {
     
               if (Input.GetKey(KeyCode.RightArrow) ){
           Debug.Log("right");
             transform.Translate (Vector3(10,0,0) * Time.deltaTime*speed);
           }
           
           
            if ( Input.GetKey(KeyCode.LeftArrow) ){
                           Debug.Log("left");
             transform.Translate (Vector3(-10,0,0) * Time.deltaTime*speed);
           }
     
     
            if ( Input.GetKey(KeyCode.UpArrow) ){
                           Debug.Log("Up");
             transform.Translate (Vector3(0,-10,0) * Time.deltaTime*speed);
           }
           
            if ( Input.GetKey(KeyCode.DownArrow) ){
                           Debug.Log("Down");
             transform.Translate (Vector3(0,10,0) * Time.deltaTime*speed);
           }
           
     
     
         if (Input.touchCount > 0 && 
           Input.GetTouch(0).phase == TouchPhase.Moved) {
         
             // Get movement of the finger since last frame
             var touchDeltaPosition:Vector3 = Input.GetTouch(0).deltaPosition;
             
             // Move object across XY plane
             transform.Translate (-touchDeltaPosition.x * speed,
             0,0);
                                 
             transform.Translate (0,-touchDeltaPosition.y * nonSpeed,0);     
 
         
         }
     
     }