Driftology/Assets/SceneLoaderUI.cs

using System.Collections;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
using TMPro;

public class SceneLoaderUI : MonoBehaviour
{
    [Header("UI Elements")]
    public TextMeshProUGUI loadingText;
    public Image loadingBarFill;

    [Header("Settings")]
    public float fakeLoadDelay = 0.1f; // Small delay to smooth progress
    private void Start()
    {
        LoadSceneByName("Menu");
    }
    public void LoadSceneByName(string sceneName)
    {
        StartCoroutine(LoadAsync(sceneName));
    }

    private IEnumerator LoadAsync(string sceneName)
    {
        if (loadingText != null)
            loadingText.text = "Loading...";

        AsyncOperation operation = SceneManager.LoadSceneAsync(sceneName);
        operation.allowSceneActivation = false;

        float progress = 0f;

        while (!operation.isDone)
        {
            // Scene progress goes up to 0.9 <20> the last 0.1 is when allowSceneActivation = true
            float targetProgress = Mathf.Clamp01(operation.progress / 0.9f);

            // Smooth progress bar update
            progress = Mathf.MoveTowards(progress, targetProgress, fakeLoadDelay);
            if (loadingBarFill != null)
                loadingBarFill.fillAmount = progress;

            if (loadingText != null)
                loadingText.text = $"Loading... {(int)(progress * 100)}%";

            // When progress reaches 1, activate the scene
            if (Mathf.Approximately(progress, 1f))
                operation.allowSceneActivation = true;

            yield return null;
        }
    }
}