如何在Unity中进行这种3D相机移动？

using UnityEngine;

public class CameraController : MonoBehaviour
{
    public float moveSpeed = 10f;
    public float rotationSpeed = 100f;
    public float zoomSpeed = 10f;

    private Transform cameraTransform;
    private Transform parentTransform;

    private void Start()
    {
        cameraTransform = GetComponentInChildren<Camera>().transform;
        parentTransform = transform.parent;
    }

    private void Update()
    {
        // 获取玩家输入的移动方向
        float horizontalInput = Input.GetAxis("Horizontal");
        float verticalInput = Input.GetAxis("Vertical");

        // 根据玩家输入的移动方向修改父物体的position属性
        Vector3 moveDirection = new Vector3(horizontalInput, 0f, verticalInput);
        parentTransform.position += moveDirection * moveSpeed * Time.deltaTime;

        // 根据玩家输入的鼠标移动修改父物体的rotation属性
        float mouseX = Input.GetAxis("Mouse X");
        float mouseY = Input.GetAxis("Mouse Y");
        parentTransform.Rotate(Vector3.up, mouseX * rotationSpeed * Time.deltaTime);
        parentTransform.Rotate(Vector3.right, -mouseY * rotationSpeed * Time.deltaTime);

        // 根据玩家输入的鼠标滚轮修改相机的Field of View属性
        float scrollInput = Input.GetAxis("Mouse ScrollWheel");
        cameraTransform.fieldOfView -= scrollInput * zoomSpeed * Time.deltaTime;
    }
}