mirror of https://github.com/ppy/osu
65 lines
2.7 KiB
C#
65 lines
2.7 KiB
C#
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
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// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
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using System.Collections.Generic;
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using System.Linq;
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using OpenTK.Graphics;
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using osu.Game.Beatmaps.Timing;
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using osu.Game.Database;
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using osu.Game.Modes.Objects;
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using osu.Game.Modes;
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namespace osu.Game.Beatmaps
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{
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public class Beatmap
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{
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public BeatmapInfo BeatmapInfo { get; set; }
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public BeatmapMetadata Metadata => BeatmapInfo?.Metadata ?? BeatmapInfo?.BeatmapSet?.Metadata;
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public List<HitObject> HitObjects { get; set; }
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public List<ControlPoint> ControlPoints { get; set; }
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public List<Color4> ComboColors { get; set; }
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public double BPMMaximum => 60000 / (ControlPoints?.Where(c => c.BeatLength != 0).OrderBy(c => c.BeatLength).FirstOrDefault() ?? ControlPoint.Default).BeatLength;
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public double BPMMinimum => 60000 / (ControlPoints?.Where(c => c.BeatLength != 0).OrderByDescending(c => c.BeatLength).FirstOrDefault() ?? ControlPoint.Default).BeatLength;
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public double BPMMode => BPMAt(ControlPoints.Where(c => c.BeatLength != 0).GroupBy(c => c.BeatLength).OrderByDescending(grp => grp.Count()).First().First().Time);
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public double BPMAt(double time)
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{
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return 60000 / BeatLengthAt(time);
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}
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public double BeatLengthAt(double time)
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{
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ControlPoint overridePoint;
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ControlPoint timingPoint = TimingPointAt(time, out overridePoint);
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return timingPoint.BeatLength;
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}
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public ControlPoint TimingPointAt(double time, out ControlPoint overridePoint)
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{
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overridePoint = null;
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ControlPoint timingPoint = null;
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foreach (var controlPoint in ControlPoints)
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{
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// Some beatmaps have the first timingPoint (accidentally) start after the first HitObject(s).
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// This null check makes it so that the first ControlPoint that makes a timing change is used as
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// the timingPoint for those HitObject(s).
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if (controlPoint.Time <= time || timingPoint == null)
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{
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if (controlPoint.TimingChange)
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{
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timingPoint = controlPoint;
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overridePoint = null;
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}
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else overridePoint = controlPoint;
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}
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else break;
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}
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return timingPoint ?? ControlPoint.Default;
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}
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public double CalculateStarDifficulty() => Ruleset.GetRuleset(BeatmapInfo.Mode).CreateDifficultyCalculator(this).Calculate();
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}
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}
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