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Merge pull request #2563 from smoogipoo/fix-hitobject-order

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Use a stable sort for hitobjects
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Dean Herbert 2018-05-16 18:41:47 +09:00 committed by GitHub
commit 7765a1aa3a
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2 changed files with 8 additions and 7 deletions
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7
osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyCalculator.cs
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@ -3,6 +3,7 @@
using System;
using System.Collections.Generic;
using System.Linq;
using osu.Game.Beatmaps;
using osu.Game.Rulesets.Difficulty;
using osu.Game.Rulesets.Mania.Beatmaps;
@ -49,11 +50,9 @@ namespace osu.Game.Rulesets.Mania.Difficulty
int columnCount = (Beatmap as ManiaBeatmap)?.TotalColumns ?? 7;
foreach (var hitObject in Beatmap.HitObjects)
difficultyHitObjects.Add(new ManiaHitObjectDifficulty((ManiaHitObject)hitObject, columnCount));
// Sort DifficultyHitObjects by StartTime of the HitObjects - just to make sure.
difficultyHitObjects.Sort((a, b) => a.BaseHitObject.StartTime.CompareTo(b.BaseHitObject.StartTime));
// Note: Stable sort is done so that the ordering of hitobjects with equal start times doesn't change
difficultyHitObjects.AddRange(Beatmap.HitObjects.Select(h => new ManiaHitObjectDifficulty((ManiaHitObject)h, columnCount)).OrderBy(h => h.BaseHitObject.StartTime));
if (!calculateStrainValues())
return 0;

8
osu.Game/Beatmaps/Formats/LegacyBeatmapDecoder.cs
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@ -54,9 +54,11 @@ namespace osu.Game.Beatmaps.Formats
base.ParseStreamInto(stream, beatmap);
// objects may be out of order *only* if a user has manually edited an .osu file.
// unfortunately there are ranked maps in this state (example: https://osu.ppy.sh/s/594828).
this.beatmap.HitObjects.Sort((x, y) => x.StartTime.CompareTo(y.StartTime));
// Objects may be out of order *only* if a user has manually edited an .osu file.
// Unfortunately there are ranked maps in this state (example: https://osu.ppy.sh/s/594828).
// OrderBy is used to guarantee that the parsing order of hitobjects with equal start times is maintained (stably-sorted)
// The parsing order of hitobjects matters in mania difficulty calculation
this.beatmap.HitObjects = this.beatmap.HitObjects.OrderBy(h => h.StartTime).ToList();
foreach (var hitObject in this.beatmap.HitObjects)
hitObject.ApplyDefaults(this.beatmap.ControlPointInfo, this.beatmap.BeatmapInfo.BaseDifficulty);