Unity3D. C#. Can can i add max and min values to zoom in this code? - unity3d

Question

In the 3D project I have script and i can rotate/move in the scene without doubts, but i have problem with Zoom, i can do this too close and soo far. I zoom it right to the floor or to far away to sky and i stack then. I use perspective camera.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
class ScrollAndPinch : MonoBehaviour
{
public Camera Camera;
public bool Rotate;
protected Plane Plane;
private void Awake()
{
if (Camera == null)
Camera = Camera.main;
}
private void Update()
{
//Update Plane
if (Input.touchCount >= 1)
Plane.SetNormalAndPosition(transform.up, transform.position);
var Delta1 = Vector3.zero;
var Delta2 = Vector3.zero;
//Scroll
if (Input.touchCount >= 1)
{
Delta1 = PlanePositionDelta(Input.GetTouch(0));
if (Input.GetTouch(0).phase == TouchPhase.Moved)
Camera.transform.Translate(Delta1, Space.World);
}
//Pinch
if (Input.touchCount >= 2)
{
var pos1 = PlanePosition(Input.GetTouch(0).position);
var pos2 = PlanePosition(Input.GetTouch(1).position);
var pos1b = PlanePosition(Input.GetTouch(0).position - Input.GetTouch(0).deltaPosition);
var pos2b = PlanePosition(Input.GetTouch(1).position - Input.GetTouch(1).deltaPosition);
//calc zoom
var zoom = Vector3.Distance(pos1, pos2) /
Vector3.Distance(pos1b, pos2b);
//edge case
if (zoom == 9 || zoom > 10)
return;
//Move cam amount the mid ray
Camera.transform.position = Vector3.LerpUnclamped(pos1, Camera.transform.position, 1 / zoom);
if (Rotate && pos2b != pos2)
Camera.transform.RotateAround(pos1, Plane.normal, Vector3.SignedAngle(pos2 - pos1, pos2b - pos1b, Plane.normal));
}
}
protected Vector3 PlanePositionDelta(Touch touch)
{
//not moved
if (touch.phase != TouchPhase.Moved)
return Vector3.zero;
//delta
var rayBefore = Camera.ScreenPointToRay(touch.position - touch.deltaPosition);
var rayNow = Camera.ScreenPointToRay(touch.position);
if (Plane.Raycast(rayBefore, out var enterBefore) && Plane.Raycast(rayNow, out var enterNow))
return rayBefore.GetPoint(enterBefore) - rayNow.GetPoint(enterNow);
//not on plane
return Vector3.zero;
}
protected Vector3 PlanePosition(Vector2 screenPos)
{
//position
var rayNow = Camera.ScreenPointToRay(screenPos);
if (Plane.Raycast(rayNow, out var enterNow))
return rayNow.GetPoint(enterNow);
return Vector3.zero;
}
private void OnDrawGizmos()
{
Gizmos.DrawLine(transform.position, transform.position + transform.up);
}
}
Sorry for noob question, i've recently started to my journey in unity3D.
How can i set the limits here?

Answer 1

If you mean you want to limit the zoom within a single pinch operation you could probably do e.g.
// Configure these in the Inspector
[SerializeField] private float minZoom = 0.1f;
[SerializeField] private float maxZoom = 10f;
...
var zoom = Vector3.Distance(pos1, pos2) / Vector3.Distance(pos1b, pos2b);
zoom = Mathf.Clamp(minZoom, maxZoom);
...
If you ment you rather want to limit the overall combined zoom you'll have to store and combine the zoom amounts like e.g.
private float finalZoom = 1;
...
var zoom = Vector3.Distance(pos1, pos2) / Vector3.Distance(pos1b, pos2b);
finalZoom *= zoom;
finalZoom = Mathf.Clamp(minZoom, maxZoom);
// And from here use finalZoom instead of zoom
Camera.transform.position = Vector3.LerpUnclamped(pos1, Camera.transform.position, 1 / finalZoom);
...

Answer 2

The answer is to use https://docs.unity3d.com/ScriptReference/Mathf.Clamp.html
Mathf.Clamp(xValue, xMin, xMax);