Question A Camera zoom-in coroutine but based on progress

I would like to know what approaches to take in order to create a coroutine similar to a scoping in effect of a sniper.

Goals:

• There is a value of scope speed
• Get the value of how close toward the target FOV is from current FOV.
  
• Get the duration needed in order to reach the target FOV with the scope speed

Mechanics:

• The player can toggle between zoom in and zoom out at any time during zooming process
• Zooming out goes back to default FOV and zoom in goes to a set value like 30.

 

Smoothing movement between any two particular values:

https://forum.unity.com/threads/beginner-need-help-with-smoothdamp.988959/#post-6430100

You have currentQuantity and desiredQuantity.
- only set desiredQuantity
- the code always moves currentQuantity towards desiredQuantity
- read currentQuantity for the smoothed value

Works for floats, Vectors, Colors, Quaternions, anything continuous or lerp-able.

The code: https://gist.github.com/kurtdekker/fb3c33ec6911a1d9bfcb23e9f62adac4


Also...

Camera stuff is pretty tricky... you may wish to consider using Cinemachine from the Unity Package Manager.

There's even a dedicated forum: https://forum.unity.com/forums/cinemachine.136/

If you insist on making your own camera controller, the simplest way to do it is to think in terms of two Vector3 points in space: where the camera is LOCATED and where the camera is LOOKING.

Code (csharp):

1. private Vector3 WhereMyCameraIsLocated;
2. private Vector3 WhatMyCameraIsLookingAt;
3.  
4. void LateUpdate()
5. {
6.   cam.transform.position = WhereMyCameraIsLocated;
7.   cam.transform.LookAt( WhatMyCameraIsLookingAt);
8. }

Then you just need to update the above two points based on your GameObjects, no need to fiddle with rotations.