How to scale objects individual with pinch zoom in ARCore and set a Min/Max scale?

Questions & Answers
1

My code:
public void _PinchtoZoom()
{
if (Input.touchCount == 2)
{
// Store both touches.
Touch touchZero = Input.GetTouch(0);
Touch touchOne = Input.GetTouch(1);

            // Find the position in the previous frame of each touch.
            Vector2 touchZeroPrevPos = touchZero.position - touchZero.deltaPosition;
            Vector2 touchOnePrevPos = touchOne.position - touchOne.deltaPosition;

            // Find the magnitude of the vector (the distance) between the touches in each frame.
            float prevTouchDeltaMag = (touchZeroPrevPos - touchOnePrevPos).magnitude;
            float touchDeltaMag = (touchZero.position - touchOne.position).magnitude;

            // Find the difference in the distances between each frame.
            float deltaMagnitudeDiff = prevTouchDeltaMag - touchDeltaMag;

            float pinchAmount = deltaMagnitudeDiff * 0.02f * Time.deltaTime;
            ARObject.transform.localScale += new Vector3(pinchAmount, pinchAmount, pinchAmount);

        }
    }

How do I set a Min/Max scale to the pinch zoom?

2

Update: This is the solution

public void pinchtoZoomScaleDown()
{

        Transform Portal = GameObject.FindWithTag("ARObject").transform;
        Vector3 newScale = new Vector3();
        newScale.x = Mathf.Clamp(Portal.localScale.x - scalingSpeed, min.x, max.x);
        newScale.y = Mathf.Clamp(Portal.localScale.y - scalingSpeed, min.y, max.y);
        newScale.z = Mathf.Clamp(Portal.localScale.z - scalingSpeed, min.z, max.z);
        Portal.transform.localScale = newScale;

    
   
}

public void pinchtoZoomScaleUp()
{
    Transform Portal = GameObject.FindWithTag("ARObject").transform;
    Vector3 newScale = new Vector3();
    newScale.x = Mathf.Clamp(Portal.localScale.x + scalingSpeed, min.x, max.x);
    newScale.y = Mathf.Clamp(Portal.localScale.y + scalingSpeed, min.y, max.y);
    newScale.z = Mathf.Clamp(Portal.localScale.z + scalingSpeed, min.z, max.z);
    Portal.transform.localScale = newScale;

}