mirror of
https://github.com/ppy/osu.git
synced 2024-12-18 02:02:54 +08:00
284 lines
10 KiB
C#
284 lines
10 KiB
C#
// 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.
|
|
|
|
#nullable disable
|
|
|
|
using osu.Game.Rulesets.Mania.Objects;
|
|
using System;
|
|
using System.Linq;
|
|
using System.Collections.Generic;
|
|
using System.Threading;
|
|
using osu.Game.Audio;
|
|
using osu.Game.Beatmaps;
|
|
using osu.Game.Rulesets.Objects;
|
|
using osu.Game.Rulesets.Objects.Types;
|
|
using osu.Game.Rulesets.Mania.Beatmaps.Patterns;
|
|
using osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy;
|
|
using osu.Game.Utils;
|
|
using osuTK;
|
|
|
|
namespace osu.Game.Rulesets.Mania.Beatmaps
|
|
{
|
|
public class ManiaBeatmapConverter : BeatmapConverter<ManiaHitObject>
|
|
{
|
|
/// <summary>
|
|
/// Maximum number of previous notes to consider for density calculation.
|
|
/// </summary>
|
|
private const int max_notes_for_density = 7;
|
|
|
|
public int TargetColumns;
|
|
public bool Dual;
|
|
public readonly bool IsForCurrentRuleset;
|
|
|
|
private readonly int originalTargetColumns;
|
|
|
|
// Internal for testing purposes
|
|
internal LegacyRandom Random { get; private set; }
|
|
|
|
private Pattern lastPattern = new Pattern();
|
|
|
|
private ManiaBeatmap beatmap;
|
|
|
|
public ManiaBeatmapConverter(IBeatmap beatmap, Ruleset ruleset)
|
|
: base(beatmap, ruleset)
|
|
{
|
|
IsForCurrentRuleset = beatmap.BeatmapInfo.Ruleset.Equals(ruleset.RulesetInfo);
|
|
|
|
double roundedCircleSize = Math.Round(beatmap.Difficulty.CircleSize);
|
|
double roundedOverallDifficulty = Math.Round(beatmap.Difficulty.OverallDifficulty);
|
|
|
|
if (IsForCurrentRuleset)
|
|
{
|
|
TargetColumns = GetColumnCountForNonConvert(beatmap.BeatmapInfo);
|
|
|
|
if (TargetColumns > ManiaRuleset.MAX_STAGE_KEYS)
|
|
{
|
|
TargetColumns /= 2;
|
|
Dual = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
float percentSliderOrSpinner = (float)beatmap.HitObjects.Count(h => h is IHasDuration) / beatmap.HitObjects.Count;
|
|
if (percentSliderOrSpinner < 0.2)
|
|
TargetColumns = 7;
|
|
else if (percentSliderOrSpinner < 0.3 || roundedCircleSize >= 5)
|
|
TargetColumns = roundedOverallDifficulty > 5 ? 7 : 6;
|
|
else if (percentSliderOrSpinner > 0.6)
|
|
TargetColumns = roundedOverallDifficulty > 4 ? 5 : 4;
|
|
else
|
|
TargetColumns = Math.Max(4, Math.Min((int)roundedOverallDifficulty + 1, 7));
|
|
}
|
|
|
|
originalTargetColumns = TargetColumns;
|
|
}
|
|
|
|
public static int GetColumnCountForNonConvert(BeatmapInfo beatmapInfo)
|
|
{
|
|
double roundedCircleSize = Math.Round(beatmapInfo.Difficulty.CircleSize);
|
|
return (int)Math.Max(1, roundedCircleSize);
|
|
}
|
|
|
|
public override bool CanConvert() => Beatmap.HitObjects.All(h => h is IHasXPosition);
|
|
|
|
protected override Beatmap<ManiaHitObject> ConvertBeatmap(IBeatmap original, CancellationToken cancellationToken)
|
|
{
|
|
IBeatmapDifficultyInfo difficulty = original.Difficulty;
|
|
|
|
int seed = (int)MathF.Round(difficulty.DrainRate + difficulty.CircleSize) * 20 + (int)(difficulty.OverallDifficulty * 41.2) + (int)MathF.Round(difficulty.ApproachRate);
|
|
Random = new LegacyRandom(seed);
|
|
|
|
return base.ConvertBeatmap(original, cancellationToken);
|
|
}
|
|
|
|
protected override Beatmap<ManiaHitObject> CreateBeatmap()
|
|
{
|
|
beatmap = new ManiaBeatmap(new StageDefinition(TargetColumns), originalTargetColumns);
|
|
|
|
if (Dual)
|
|
beatmap.Stages.Add(new StageDefinition(TargetColumns));
|
|
|
|
return beatmap;
|
|
}
|
|
|
|
protected override IEnumerable<ManiaHitObject> ConvertHitObject(HitObject original, IBeatmap beatmap, CancellationToken cancellationToken)
|
|
{
|
|
if (original is ManiaHitObject maniaOriginal)
|
|
{
|
|
yield return maniaOriginal;
|
|
|
|
yield break;
|
|
}
|
|
|
|
var objects = IsForCurrentRuleset ? generateSpecific(original, beatmap) : generateConverted(original, beatmap);
|
|
|
|
if (objects == null)
|
|
yield break;
|
|
|
|
foreach (ManiaHitObject obj in objects)
|
|
yield return obj;
|
|
}
|
|
|
|
private readonly LimitedCapacityQueue<double> prevNoteTimes = new LimitedCapacityQueue<double>(max_notes_for_density);
|
|
private double density = int.MaxValue;
|
|
|
|
private void computeDensity(double newNoteTime)
|
|
{
|
|
prevNoteTimes.Enqueue(newNoteTime);
|
|
|
|
if (prevNoteTimes.Count >= 2)
|
|
density = (prevNoteTimes[^1] - prevNoteTimes[0]) / prevNoteTimes.Count;
|
|
}
|
|
|
|
private double lastTime;
|
|
private Vector2 lastPosition;
|
|
private PatternType lastStair = PatternType.Stair;
|
|
|
|
private void recordNote(double time, Vector2 position)
|
|
{
|
|
lastTime = time;
|
|
lastPosition = position;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Method that generates hit objects for osu!mania specific beatmaps.
|
|
/// </summary>
|
|
/// <param name="original">The original hit object.</param>
|
|
/// <param name="originalBeatmap">The original beatmap. This is used to look-up any values dependent on a fully-loaded beatmap.</param>
|
|
/// <returns>The hit objects generated.</returns>
|
|
private IEnumerable<ManiaHitObject> generateSpecific(HitObject original, IBeatmap originalBeatmap)
|
|
{
|
|
var generator = new SpecificBeatmapPatternGenerator(Random, original, beatmap, lastPattern, originalBeatmap);
|
|
|
|
foreach (var newPattern in generator.Generate())
|
|
{
|
|
lastPattern = newPattern;
|
|
|
|
foreach (var obj in newPattern.HitObjects)
|
|
yield return obj;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Method that generates hit objects for non-osu!mania beatmaps.
|
|
/// </summary>
|
|
/// <param name="original">The original hit object.</param>
|
|
/// <param name="originalBeatmap">The original beatmap. This is used to look-up any values dependent on a fully-loaded beatmap.</param>
|
|
/// <returns>The hit objects generated.</returns>
|
|
private IEnumerable<ManiaHitObject> generateConverted(HitObject original, IBeatmap originalBeatmap)
|
|
{
|
|
Patterns.PatternGenerator conversion = null;
|
|
|
|
switch (original)
|
|
{
|
|
case IHasDistance:
|
|
{
|
|
var generator = new DistanceObjectPatternGenerator(Random, original, beatmap, lastPattern, originalBeatmap);
|
|
conversion = generator;
|
|
|
|
var positionData = original as IHasPosition;
|
|
|
|
for (int i = 0; i <= generator.SpanCount; i++)
|
|
{
|
|
double time = original.StartTime + generator.SegmentDuration * i;
|
|
|
|
recordNote(time, positionData?.Position ?? Vector2.Zero);
|
|
computeDensity(time);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case IHasDuration endTimeData:
|
|
{
|
|
conversion = new EndTimeObjectPatternGenerator(Random, original, beatmap, lastPattern, originalBeatmap);
|
|
|
|
recordNote(endTimeData.EndTime, new Vector2(256, 192));
|
|
computeDensity(endTimeData.EndTime);
|
|
break;
|
|
}
|
|
|
|
case IHasPosition positionData:
|
|
{
|
|
computeDensity(original.StartTime);
|
|
|
|
conversion = new HitObjectPatternGenerator(Random, original, beatmap, lastPattern, lastTime, lastPosition, density, lastStair, originalBeatmap);
|
|
|
|
recordNote(original.StartTime, positionData.Position);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (conversion == null)
|
|
yield break;
|
|
|
|
foreach (var newPattern in conversion.Generate())
|
|
{
|
|
lastPattern = conversion is EndTimeObjectPatternGenerator ? lastPattern : newPattern;
|
|
lastStair = (conversion as HitObjectPatternGenerator)?.StairType ?? lastStair;
|
|
|
|
foreach (var obj in newPattern.HitObjects)
|
|
yield return obj;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// A pattern generator for osu!mania-specific beatmaps.
|
|
/// </summary>
|
|
private class SpecificBeatmapPatternGenerator : Patterns.Legacy.PatternGenerator
|
|
{
|
|
public SpecificBeatmapPatternGenerator(LegacyRandom random, HitObject hitObject, ManiaBeatmap beatmap, Pattern previousPattern, IBeatmap originalBeatmap)
|
|
: base(random, hitObject, beatmap, previousPattern, originalBeatmap)
|
|
{
|
|
}
|
|
|
|
public override IEnumerable<Pattern> Generate()
|
|
{
|
|
yield return generate();
|
|
}
|
|
|
|
private Pattern generate()
|
|
{
|
|
var positionData = HitObject as IHasXPosition;
|
|
|
|
int column = GetColumn(positionData?.X ?? 0);
|
|
|
|
var pattern = new Pattern();
|
|
|
|
if (HitObject is IHasDuration endTimeData)
|
|
{
|
|
pattern.Add(new HoldNote
|
|
{
|
|
StartTime = HitObject.StartTime,
|
|
Duration = endTimeData.Duration,
|
|
Column = column,
|
|
Samples = HitObject.Samples,
|
|
NodeSamples = (HitObject as IHasRepeats)?.NodeSamples ?? defaultNodeSamples
|
|
});
|
|
}
|
|
else if (HitObject is IHasXPosition)
|
|
{
|
|
pattern.Add(new Note
|
|
{
|
|
StartTime = HitObject.StartTime,
|
|
Samples = HitObject.Samples,
|
|
Column = column
|
|
});
|
|
}
|
|
|
|
return pattern;
|
|
}
|
|
|
|
/// <remarks>
|
|
/// osu!mania-specific beatmaps in stable only play samples at the start of the hold note.
|
|
/// </remarks>
|
|
private List<IList<HitSampleInfo>> defaultNodeSamples
|
|
=> new List<IList<HitSampleInfo>>
|
|
{
|
|
HitObject.Samples,
|
|
new List<HitSampleInfo>()
|
|
};
|
|
}
|
|
}
|
|
}
|