using System.Collections;
using System.Collections.Generic;
using BigSpace.XRCore.Base;
using BigSpace.XRCore.Scene;
using UnityEngine;
using UnityEngine.UI;

public class SceneChangeUIMgr : MonoSingleton<SceneChangeUIMgr>
{
    public GameObject changSceneObj;
    public Image changSceneUI;

    //计时相关
    bool isRunChangeAlpha = false;      //是否开始渐变
    float fadeDuration = 2f;            //渐变持续时间
    float currentAlpha = 0;             //透明度值
    bool isShowChangeSceneUI = false;   //是否显示

    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        //转场UI渐变(隐藏UI)
        if (isRunChangeAlpha)
        {
            if (isShowChangeSceneUI)
            {
                currentAlpha += Time.deltaTime / fadeDuration;
                changSceneUI.color = new Color(changSceneUI.color.r, changSceneUI.color.g, changSceneUI.color.b, currentAlpha);
                if (currentAlpha >= 1)
                {
                    isRunChangeAlpha = false;
                    changSceneObj.SetActive(false);
                    currentAlpha = 1;
                }
            }
            else
            {
                currentAlpha -= Time.deltaTime / fadeDuration;
                changSceneUI.color = new Color(changSceneUI.color.r, changSceneUI.color.g, changSceneUI.color.b, currentAlpha);
                if (currentAlpha <= 0)
                {
                    isRunChangeAlpha = false;
                    changSceneObj.SetActive(false);
                    currentAlpha = 0;
                }
            }

        }
    }

    //显示转场景UI
    public void ShowChangeSecneUI(bool isShowUI)
    {
        //changSceneObj.SetActive(true); ////旧UI相关
        isShowChangeSceneUI = isShowUI;
        isRunChangeAlpha = true;
    }
}