CangJie/Assets/Scripts/勍/Parallax.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Sirenix.OdinInspector;
using Cinemachine;

/*
    更新日期2021.7.24 视差类
    使用方式：将类挂载到需要视差的背景上，将主摄像机赋值给Cam，调节视差率即可
    注意 移动的背景一定要比不移动的面积大
*/
//视差类，霄酱写的🤔
[ExecuteAlways]
public class Parallax : MonoBehaviour
{

    private Transform Cam;//视差摄像机
    [Header("代表水平方向上、随着相机运动的倍率。")]
    public float moveRate;//视差率
    [Header("有时候视差起点会被不可抗力污染，当场景的东西位置乱了，就手动处理一下这个值吧")]
    public float startPoint;//起点，自动获取
    // Start is called before the first frame update
    void Start()
    {
        Cam = GameObject.FindGameObjectWithTag("MainCamera").transform;
        //startPoint = transform.position.x;//获取当前起点位置
        //startPoint = transform.localPosition.x;//获取当前起点位置
    }

    void TheUpdate()
    {
        if(Cam == null)
        {
            Cam = GameObject.FindGameObjectWithTag("MainCamera").transform;
            //Debug.LogError("视差摄像机未赋值,把主摄像机赋值给Cam就行");
            //return;
        }
        //每帧更新位置
        //transform.position = new Vector2(startPoint + Cam.position.x * moveRate, transform.position.y);
        transform.localPosition = new Vector2(startPoint + Cam.position.x * moveRate, transform.position.y);
    }


    //为了解决Updata矛盾，使用了以下代码
    private void OnEnable()
    {
        CinemachineCore.CameraUpdatedEvent.AddListener(CameraUpdate);
    }
    
    private void OnDisable()
    {
        CinemachineCore.CameraUpdatedEvent.RemoveListener(CameraUpdate);
    }
    
    private void CameraUpdate(CinemachineBrain arg0)
    {
        TheUpdate();
    }
}