HeavenStudio/Assets/Scripts/GlobalGameManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
using DG.Tweening;

public class GlobalGameManager : MonoBehaviour
{
    public static GlobalGameManager instance { get; set; }

    public static int loadedScene;
    public int lastLoadedScene;
    public static float fadeDuration;

    public GameObject loadScenePrefab;
    public GameObject hourGlass;

    public static string levelLocation;
    public static bool officialLevel;

    public enum Scenes : int
    {
        SplashScreen = 0,
        Menu = 1,
        Editor = 2,
        Game = 3
    }

    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
    public static void Init()
    {
        BasicCheck();

        loadedScene = 0;
        fadeDuration = 0;
    }

    public void Awake()
    {
        Init();
        DontDestroyOnLoad(this.gameObject);
        instance = this;
        Starpelly.OS.Windows.ChangeWindowTitle($"Rhythm Heaven Mania DEMO");
    }

    public static GameObject CreateFade()
    {
        GameObject fade = new GameObject();
        DontDestroyOnLoad(fade);
        fade.transform.localScale = new Vector3(4000, 4000);
        SpriteRenderer sr = fade.AddComponent<SpriteRenderer>();
        sr.sprite = Resources.Load<Sprite>("Sprites/GeneralPurpose/Square");
        sr.sortingOrder = 20000;
        fade.layer = 5;
        return fade;
    }


    public static void BasicCheck()
    {
        if (FindGGM() == null)
        {
            GameObject GlobalGameManager = new GameObject("GlobalGameManager");
            GlobalGameManager.name = "GlobalGameManager";
            GlobalGameManager.AddComponent<GlobalGameManager>();
        }
    }

    public static GameObject FindGGM()
    {
        if (GameObject.Find("GlobalGameManager") != null)
            return GameObject.Find("GlobalGameManager");
        else
            return null;
    }

    public static void LoadScene(int sceneIndex, float duration = 0.35f)
    {
        print("bruh");
        BasicCheck();
        loadedScene = sceneIndex;
        fadeDuration = duration;

        // DOTween.Clear(true);
        // SceneManager.LoadScene(sceneIndex);

        GameObject fade = CreateFade();
        fade.GetComponent<SpriteRenderer>().color = new Color(0, 0, 0, 0);
        fade.GetComponent<SpriteRenderer>().DOColor(Color.black, fadeDuration).OnComplete(() => { SceneManager.LoadScene(loadedScene); fade.GetComponent<SpriteRenderer>().DOColor(new Color(0, 0, 0, 0), fadeDuration).OnComplete(() => { Destroy(fade); }); });
    }
}