Why does my FPS camera rotates faster on lower frame rates?

I have a simple first-person controller setup and today I've noticed that the camera becomes more sensitive on lower frame rates. Here is the setup and code that I use:

Code (CSharp):

1.     private void Start()
2.     {
3. //...
4.         _inputActionMap.FindAction("Look").performed +=
5.             context => ProcessCamera(context.ReadValue<Vector2>());
6. //...
7. }

Code (CSharp):

1.     private void ProcessCamera(Vector2 direction)
2.     {
3.         var mouseX = direction.x * cameraSensitivity;
4.         var mouseY = direction.y * cameraSensitivity;
5.  
6.         _cameraXRotation -= mouseY;
7.         _cameraXRotation = Mathf.Clamp(_cameraXRotation, -80, 80);
8.        
9.         playerCamera.localRotation = Quaternion.Euler(_cameraXRotation, 0, 0);
10.         playerBody.Rotate(Vector3.up * mouseX);
11.     }

 

https://docs.unity3d.com/ScriptReference/Time-deltaTime.html

I think you forgot to calculate with frametime.

 

Sadly that doesn't fix the issue.

 

Delta [Pointer] is not normalize by default, its mean the value greater than 1 or lesser than -1, multiply by sensitivity and that is cost a large scale of movement

this is how i fix my delta

 

Oh, I didn't know that it wasn't normalized. Thanks a lot, however, it doesn't feel as smooth/responsive as it used to be now. Any ideas on improving that?

 

i dont know what kind of camera rotation technique you are using, but here some API for most common use for smooth

for vector 2
https://docs.unity3d.com/ScriptReference/Vector2.SmoothDamp.html
for single axis Float
https://docs.unity3d.com/ScriptReference/Mathf.SmoothDampAngle.html
for quaternion
https://docs.unity3d.com/ScriptReference/Quaternion.Slerp.html
or
https://docs.unity3d.com/ScriptReference/Quaternion.SlerpUnclamped.html

i recommend to try Mathf.SmoothDamp for mouseX and mousY
https://docs.unity3d.com/ScriptReference/Mathf.SmoothDamp.html