Как сделать ограничение камеры?

using UnityEngine;
 
[RequireComponent(typeof(PlayerMotor))]
public class PlayerController : MonoBehaviour
{
    [SerializeField]
    private float speed = 5f;
 
    [SerializeField]
    private float sencivity = 3f;
 
    private PlayerMotor motor;
 
    private void Start()
    {
        motor = GetComponent<PlayerMotor>();
    }
 
    private void Update()
    {
        float xMove = Input.GetAxisRaw("Horizontal");
        float zMove = Input.GetAxisRaw("Vertical");
 
        Vector3 moveHor = transform.right * xMove;
        Vector3 moveVer = transform.forward * zMove;
 
        Vector3 velocity = (moveHor + moveVer).normalized * speed;
 
        motor.Move(velocity);
 
        float yRot = Input.GetAxisRaw("Mouse X");
        Vector3 rotation = new Vector3(0f, yRot, 0f) * sencivity;
 
        motor.Rotate(rotation);
 
        float xRot = Input.GetAxisRaw("Mouse Y");
        Vector3 camRotate = new Vector3(xRot, 0f, 0f) * sencivity;
 
        motor.camRotate(camRotate);
    }
}

using UnityEngine;
 
[RequireComponent(typeof(Rigidbody))]
public class PlayerMotor : MonoBehaviour
{
    [SerializeField]
    private Camera cam;
 
    private Rigidbody rb;
 
    private Vector3 velocity = Vector3.zero;
    private Vector3 rotation = Vector3.zero;
    private Vector3 camRotation = Vector3.zero;
 
    private void Start()
    {
        rb = GetComponent<Rigidbody>();
        Cursor.lockState = CursorLockMode.Locked;
    }
 
    public void Move(Vector3 _vel)
    {
        velocity = _vel;
    }
 
    public void Rotate(Vector3 _rot)
    {
        rotation = _rot;
    }
 
    public void camRotate(Vector3 _rotCam)
    {
        camRotation = _rotCam;
    }
 
    private void FixedUpdate()
    {
        PerformMove();
        PerformRotate();
    }
 
    private void PerformMove()
    {
        if (velocity != Vector3.zero)
            rb.MovePosition(rb.position + velocity * Time.fixedDeltaTime);
    }
 
    private void PerformRotate()
    {
        rb.MoveRotation(rb.rotation * Quaternion.Euler(rotation));
 
        if (cam != null)
            cam.transform.Rotate(-camRotation);
    }
}