カメラの横移動とオブジェクトを中心に回転

CameraMove.cs

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

public class CameraMove : MonoBehaviour
{

    int Mode;
    public GameObject camera;
    public float angle = 10f;
    private Vector3 targetPos;
    public Transform target;
    public float speed = 1.0f;


    void Start()
    {

        Mode = 1;

    }

    // Update is called once per frame
    void Update()
    {

        Mode = 1;

        switch (Mode)
        {
            case 0:
                camerayokoidou();
                break;


            case 1:
                camerakaiten();
                break;
        }
    }



void camerayokoidou()
    {
        camera.transform.position += new Vector3(5, 0, 0);
    }
void camerakaiten()
    {
        transform.LookAt(target);
        Vector3 axis = transform.TransformDirection(Vector3.up);
        transform.RotateAround(target.position, axis, speed*0.01f);

    }
}