osu-lazer/osu.Game/Screens/Menu/Intro.cs

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.

using osu.Framework.Allocation;
using osu.Framework.Audio;
using osu.Framework.Audio.Sample;
using osu.Framework.Audio.Track;
using osu.Framework.Bindables;
using osu.Framework.Screens;
using osu.Framework.Graphics;
using osu.Framework.MathUtils;
using osu.Game.Beatmaps;
using osu.Game.Configuration;
using osu.Game.IO.Archives;
using osu.Game.Screens.Backgrounds;
using osuTK;
using osuTK.Graphics;

namespace osu.Game.Screens.Menu
{
    public class Intro : StartupScreen
    {
        private const string menu_music_beatmap_hash = "3c8b1fcc9434dbb29e2fb613d3b9eada9d7bb6c125ceb32396c3b53437280c83";

        /// <summary>
        /// Whether we have loaded the menu previously.
        /// </summary>
        public bool DidLoadMenu;

        private MainMenu mainMenu;
        private SampleChannel welcome;
        private SampleChannel seeya;

        protected override BackgroundScreen CreateBackground() => new BackgroundScreenBlack();

        private readonly BindableDouble exitingVolumeFade = new BindableDouble(1);

        [Resolved]
        private AudioManager audio { get; set; }

        private Bindable<bool> menuVoice;
        private Bindable<bool> menuMusic;
        private Track track;
        private WorkingBeatmap introBeatmap;

        [BackgroundDependencyLoader]
        private void load(OsuConfigManager config, BeatmapManager beatmaps, Framework.Game game)
        {
            menuVoice = config.GetBindable<bool>(OsuSetting.MenuVoice);
            menuMusic = config.GetBindable<bool>(OsuSetting.MenuMusic);

            BeatmapSetInfo setInfo = null;

            if (!menuMusic.Value)
            {
                var sets = beatmaps.GetAllUsableBeatmapSets();
                if (sets.Count > 0)
                    setInfo = beatmaps.QueryBeatmapSet(s => s.ID == sets[RNG.Next(0, sets.Count - 1)].ID);
            }

            if (setInfo == null)
            {
                setInfo = beatmaps.QueryBeatmapSet(b => b.Hash == menu_music_beatmap_hash);

                if (setInfo == null)
                {
                    // we need to import the default menu background beatmap
                    setInfo = beatmaps.Import(new ZipArchiveReader(game.Resources.GetStream(@"Tracks/circles.osz"), "circles.osz")).Result;

                    setInfo.Protected = true;
                    beatmaps.Update(setInfo);
                }
            }

            introBeatmap = beatmaps.GetWorkingBeatmap(setInfo.Beatmaps[0]);
            track = introBeatmap.Track;

            welcome = audio.Samples.Get(@"welcome");
            seeya = audio.Samples.Get(@"seeya");
        }

        private const double delay_step_one = 2300;
        private const double delay_step_two = 600;

        public const int EXIT_DELAY = 3000;

        protected override void LogoArriving(OsuLogo logo, bool resuming)
        {
            base.LogoArriving(logo, resuming);

            if (!resuming)
            {
                Beatmap.Value = introBeatmap;
                introBeatmap = null;

                if (menuVoice.Value)
                    welcome.Play();

                Scheduler.AddDelayed(delegate
                {
                    // Only start the current track if it is the menu music. A beatmap's track is started when entering the Main Manu.
                    if (menuMusic.Value)
                    {
                        track.Start();
                        track = null;
                    }

                    LoadComponentAsync(mainMenu = new MainMenu());

                    Scheduler.AddDelayed(delegate
                    {
                        DidLoadMenu = true;
                        this.Push(mainMenu);
                    }, delay_step_one);
                }, delay_step_two);
            }

            logo.Colour = Color4.White;
            logo.Ripple = false;

            const int quick_appear = 350;

            int initialMovementTime = logo.Alpha > 0.2f ? quick_appear : 0;

            logo.MoveTo(new Vector2(0.5f), initialMovementTime, Easing.OutQuint);

            if (!resuming)
            {
                logo.ScaleTo(1);
                logo.FadeIn();
                logo.PlayIntro();
            }
            else
            {
                logo.Triangles = false;

                logo
                    .ScaleTo(1, initialMovementTime, Easing.OutQuint)
                    .FadeIn(quick_appear, Easing.OutQuint)
                    .Then()
                    .RotateTo(20, EXIT_DELAY * 1.5f)
                    .FadeOut(EXIT_DELAY);
            }
        }

        public override void OnSuspending(IScreen next)
        {
            this.FadeOut(300);
            base.OnSuspending(next);
        }

        public override bool OnExiting(IScreen next)
        {
            //cancel exiting if we haven't loaded the menu yet.
            return !DidLoadMenu;
        }

        public override void OnResuming(IScreen last)
        {
            this.FadeIn(300);

            double fadeOutTime = EXIT_DELAY;
            //we also handle the exit transition.
            if (menuVoice.Value)
                seeya.Play();
            else
                fadeOutTime = 500;

            audio.AddAdjustment(AdjustableProperty.Volume, exitingVolumeFade);
            this.TransformBindableTo(exitingVolumeFade, 0, fadeOutTime).OnComplete(_ => this.Exit());

            //don't want to fade out completely else we will stop running updates.
            Game.FadeTo(0.01f, fadeOutTime);

            base.OnResuming(last);
        }
    }
}