Not Allowing Camera To Rotate Past Certain Point

Hello!

I'm back at the Unity Forum but this for another game! I would like my camera to follow the mouse but not to rotate past a certain point so the max I want it to rotate is sideways (180 degrees and -180 degrees)
How would I do this?
Here is my code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class CameraLook : MonoBehaviour
6. {
7.     public GameObject player;
8.     public GameObject playerCamera;
9.     public float sensitivity;
10.     void FixedUpdate ()
11.     {
12.         float rotateHorizontal = Input.GetAxis ("Mouse X");
13.         playerCamera.transform.RotateAround (player.transform.position, Vector3.up, rotateHorizontal * sensitivity);
14.     }
15. }
16.  

Thanks!

 

Hello,

How about using some checks to determine if the camera has reached, or passed, any of the two end points, and then make it stop going further in the wrong direction?

 

I try that but it said a Quarternion can't use >