Scroll Wheel Replacement for Touch Screen(Android)

Unity Engine
1

I have a script that is edited from the original MouseOrbit.js in Unity, to include zooming with the Scroll Wheel, Below:

var target : Transform;
var distance = 10.0;
var cameraSpeed = 5;

var xSpeed = 175.0;
var ySpeed = 75.0;

var yMinLimit = 20; //Lowest vertical angle in respect with the target.
var yMaxLimit = 80;

var minDistance = 5; //Min distance of the camera from the target
var maxDistance = 20;

private var x = 0.0;
private var y = 0.0;

function Start () {
    var angles = transform.eulerAngles;
    x = angles.y;
    y = angles.x;

   // Make the rigid body not change rotation
      if (rigidbody)
      rigidbody.freezeRotation = true;
}

function Update () {
    if (target  camera) {

   //Zooming with mouse
   distance += Input.GetAxis("Mouse ScrollWheel")*distance*-1;
   distance = Mathf.Clamp(distance, minDistance, maxDistance);

   //Detect mouse drag;
   if(Input.GetMouseButton(0))   {
   
        x += Input.GetAxis("Mouse X") * xSpeed * 0.02;
        y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02;       
      }
      y = ClampAngle(y, yMinLimit, yMaxLimit);
              
        var rotation = Quaternion.Euler(y, x, 0);
        var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;
         
   transform.position = Vector3.Lerp (transform.position, position, cameraSpeed*Time.deltaTime);
      transform.rotation = rotation;      
    }
}

static function ClampAngle (angle : float, min : float, max : float) {
   if (angle < -360)
      angle += 360;
   if (angle > 360)
      angle -= 360;
   return Mathf.Clamp (angle, min, max);
}

Like I said there is nothing wrong with it but i would like to use it on an Android device to control the camera around a simple 3D object, for people to get a closer look at some of my work, i would like to find a way to scroll on the Android Touch Screen, By either placing a simple GUI Slider for zooming or actually Changing the script to allow a “Pinch” for zooming.

A “Pinch” Is placing two fingers on the touch screen, and sliding them together for zooming in or further appart for zooming out.

Please help.
Thanks.

PS: I am a n00b at this, dont hate me we were all there before.

2

let me know if you found a solution for this!