SecuritySystem.cs

using System;
using UnityEngine;
using Cinemachine;

public class SecuritySystem : MonoBehaviour
{
    [SerializeField] protected CinemachineBrain brain;
    [SerializeField] protected CinemachineVirtualCamera[] virtualCams;
    [SerializeField] protected CinemachineVirtualCamera thirdPersonCamera;
    [SerializeField] protected bool inZone = false;
    [SerializeField] protected int currentCamera;

    [SerializeField] protected int fov = 60;
    protected int fovZoomLevel;

    // Update is called once per frame
    void Update()
    {
        //If the capsule is in the trigger zone
        if (inZone)
        {
            //Cycle through cameras using the C keycode
            if (Input.GetKeyDown(KeyCode.C))
            {
                currentCamera++;
                
                if (currentCamera > virtualCams.Length - 1)
                {
                    if (currentCamera > virtualCams.Length - 1)
                    {
                        virtualCams[currentCamera - 1].Priority = 10;
                    }
                    
                    currentCamera = 0;
                    virtualCams[currentCamera].Priority = 11;
                }
                else
                {
                    virtualCams[currentCamera].Priority = 11;
                }
                
                if (currentCamera > 0)
                {
                    virtualCams[currentCamera - 1].Priority = 10;
                }
            }
            
            //If the current camera is set to the FOV camera (which is the last camera in list of 3) zoom in when you press space
            if (Input.GetKeyDown(KeyCode.Space) && currentCamera == 2)
            {
                if (fovZoomLevel < 2)
                {
                    fovZoomLevel++;
                    fov -= 20;
                }
                else
                {
                    fovZoomLevel = 0;
                    fov = 60;
                }
            
                brain.ActiveVirtualCamera.VirtualCameraGameObject.GetComponent<CinemachineVirtualCamera>().m_Lens.FieldOfView = fov;
            }
        }
    }

    //Switch from the third person camera on the capsule to the first camera in the list when you enter the zone
    private void OnTriggerEnter(Collider other)
    {
        if (other.transform.CompareTag("Player") && !inZone)
        {
            inZone = true;
            thirdPersonCamera.Priority = 10;
            
            foreach (var camera in virtualCams)
            {
                if (camera != null)
                {
                    camera.Priority = 10;
                    
                    if (camera == virtualCams[0])
                    {
                        camera.Priority = 11;
                    }
                }
            }
        }
    }

    //Switch from the current camera to the third person camera on teh capsule when you enter you exit the zone
    private void OnTriggerExit(Collider other)
    {
        if (inZone)
        {
            inZone = false;
            
            foreach (var camera in virtualCams)
            {
                if (camera != null)
                {
                    if (camera == virtualCams[0])
                    {
                        camera.Priority = 10;
                    }
                }
            }

            thirdPersonCamera.Priority = 11;
        }
    }
}