[unity ] camera movement

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CameraMovement : MonoBehaviour
{ 
    private static CameraMovement instance;
    public GameObject playerPos;

    private float offsetY = 45f;
    private float offsetZ = -41;
    private float offsetX = 3.5f;

    Vector3 cameraPosition;

    public void Start()
    {
        cameraPosition.x = playerPos.transform.position.x + 3;
        cameraPosition.y = playerPos.transform.position.y + 46;
        cameraPosition.z = playerPos.transform.position.z + -46;
    }

    private void LateUpdate()
    {
        cameraPosition.y = playerPos.transform.position.y + offsetY;
        transform.position = cameraPosition;
    }

    public void CarmeraNextRoom()
    {
        cameraPosition.x = playerPos.transform.position.x + offsetX;
        cameraPosition.z = playerPos.transform.position.z + -46;
    }
}