osu/osu.Game/Beatmaps/Beatmap.cs

65 lines
2.7 KiB
C#

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