我正在使用放大和缩小 camera 的脚本，但我已将其他 cameras POVs 添加到游戏中，因此我试图使该脚本适用于当前选定的 camera。

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

public class cameraZoomController : MonoBehaviour
{
    private Camera cam;
    private float targetZoom;
    private float zoomFactor = 2f;
    [SerializeField] private float zoomLerpSpeed = 10;

    void Start()
    {
        cam = Camera.main;
        targetZoom = cam.orthographicSize;
    }

    // Update is called once per frame
    void Update()
    {
        float scrollData;
        scrollData = Input.GetAxis("Mouse ScrollWheel");
        //debug.log(scrollData);

        targetZoom = targetZoom - scrollData * zoomFactor;
        targetZoom = Mathf.Clamp(targetZoom, 0f, 10f);
        cam.orthographicSize = Mathf.Lerp(cam.orthographicSize, targetZoom, Time.deltaTime * zoomLerpSpeed);
    }
}