mirror of
https://github.com/ppy/osu
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77 lines
3.0 KiB
C#
77 lines
3.0 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using osu.Framework.Graphics.Sprites;
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using osu.Game.Audio;
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using osu.Game.Beatmaps;
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using osu.Game.Rulesets.Mania.Beatmaps;
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using osu.Game.Rulesets.Mania.Objects;
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using osu.Game.Rulesets.Mods;
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namespace osu.Game.Rulesets.Mania.Mods
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{
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public class ManiaModInvert : Mod, IApplicableAfterBeatmapConversion
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{
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public override string Name => "Invert";
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public override string Acronym => "IN";
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public override double ScoreMultiplier => 1;
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public override string Description => "Hold the keys. To the beat.";
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public override IconUsage? Icon => FontAwesome.Solid.YinYang;
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public override ModType Type => ModType.Conversion;
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public void ApplyToBeatmap(IBeatmap beatmap)
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{
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var maniaBeatmap = (ManiaBeatmap)beatmap;
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var newObjects = new List<ManiaHitObject>();
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foreach (var column in maniaBeatmap.HitObjects.GroupBy(h => h.Column))
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{
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var newColumnObjects = new List<ManiaHitObject>();
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var locations = column.OfType<Note>().Select(n => (startTime: n.StartTime, samples: n.Samples))
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.Concat(column.OfType<HoldNote>().SelectMany(h => new[]
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{
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(startTime: h.StartTime, samples: h.GetNodeSamples(0)),
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(startTime: h.EndTime, samples: h.GetNodeSamples(1))
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}))
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.OrderBy(h => h.startTime).ToList();
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for (int i = 0; i < locations.Count - 1; i++)
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{
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// Full duration of the hold note.
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double duration = locations[i + 1].startTime - locations[i].startTime;
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// Beat length at the end of the hold note.
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double beatLength = beatmap.ControlPointInfo.TimingPointAt(locations[i + 1].startTime).BeatLength;
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// Decrease the duration by at most a 1/4 beat to ensure there's no instantaneous notes.
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duration = Math.Max(duration / 2, duration - beatLength / 4);
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newColumnObjects.Add(new HoldNote
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{
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Column = column.Key,
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StartTime = locations[i].startTime,
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Duration = duration,
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NodeSamples = new List<IList<HitSampleInfo>> { locations[i].samples, Array.Empty<HitSampleInfo>() }
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});
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}
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newObjects.AddRange(newColumnObjects);
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}
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maniaBeatmap.HitObjects = newObjects.OrderBy(h => h.StartTime).ToList();
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// No breaks
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maniaBeatmap.Breaks.Clear();
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}
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}
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}
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