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9
Question by azmundai · Jun 22, 2010 at 07:18 AM · zoomscroll-wheel

Mouse Wheel Zoom

Hey all, I have a ortho camera, I can't figure out how to make it so the mouse wheel will scroll in or out. I need the script to change main.camera.orthographicSize in increments of 1. Max 6 Min 1.

If you provide a script can you give me a brief explanation of how it works, specifically how I code for zoom in vs zoom out?

Thanks! Joe

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Answer by Rispetto · Aug 12, 2016 at 02:38 PM

I used some of the code in this thread and wrote my own using c#. When you run the script it will set the camera to the current cameraCurrentZoom, then recognise when the player uses the scroll wheel and manipulate the current zoom level to that number. This is, of course, designed for a 2D Orthographic camera.

using UnityEngine; using System.Collections;

public class CameraManager : MonoBehaviour {

 public int cameraCurrentZoom = 8;
 public int cameraZoomMax = 20;
 public int cameraZoomMin = 5;

 void Start ()
 {
     Camera.main.orthographicSize = cameraCurrentZoom;
 }

 void Update () {

     if (Input.GetAxis("Mouse ScrollWheel") < 0) // back
     {
         if (cameraCurrentZoom < cameraZoomMax)
         {
             cameraCurrentZoom += 1;
             Camera.main.orthographicSize = Mathf.Max(Camera.main.orthographicSize + 1);
         } 
     }

     if (Input.GetAxis("Mouse ScrollWheel") > 0) // forward
     {
         if (cameraCurrentZoom > cameraZoomMin)
         {
             cameraCurrentZoom -= 1;
             Camera.main.orthographicSize = Mathf.Min(Camera.main.orthographicSize - 1);
         }   
     }



     }
 }
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Answer by NathoSteveo · Apr 09, 2020 at 09:07 AM

bad examples

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