unity小地图缩放移动功能

小地图的相机上创建脚本

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

public class nohappy : MonoBehaviour
{
   
   
    //摄像机前进后退的速率
    private float view_value = 20f;
    private float maximum = 58;//最大镜头视角
    private float minmum = 26;//最小镜头视角

    //滚轮