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Merge pull request #3564 from smoogipoo/tighten-diffcalc-tolerances

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Make difficulty calculation closer match osu!stable
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Dean Herbert 2018-10-12 17:44:58 +09:00 committed by GitHub
commit a1032a94bf
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9 changed files with 133 additions and 30 deletions
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55
osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapProcessor.cs
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@ -10,6 +10,8 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
{
public class OsuBeatmapProcessor : BeatmapProcessor
{
private const int stack_distance = 3;
public OsuBeatmapProcessor(IBeatmap beatmap)
: base(beatmap)
{
@ -18,17 +20,21 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
public override void PostProcess()
{
base.PostProcess();
applyStacking((Beatmap<OsuHitObject>)Beatmap);
var osuBeatmap = (Beatmap<OsuHitObject>)Beatmap;
// Reset stacking
foreach (var h in osuBeatmap.HitObjects)
h.StackHeight = 0;
if (Beatmap.BeatmapInfo.BeatmapVersion >= 6)
applyStacking(osuBeatmap);
else
applyStackingOld(osuBeatmap);
}
private void applyStacking(Beatmap<OsuHitObject> beatmap)
{
const int stack_distance = 3;
// Reset stacking
for (int i = 0; i <= beatmap.HitObjects.Count - 1; i++)
beatmap.HitObjects[i].StackHeight = 0;
// Extend the end index to include objects they are stacked on
int extendedEndIndex = beatmap.HitObjects.Count - 1;
for (int i = beatmap.HitObjects.Count - 1; i >= 0; i--)
@ -167,5 +173,40 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
}
}
}
private void applyStackingOld(Beatmap<OsuHitObject> beatmap)
{
for (int i = 0; i < beatmap.HitObjects.Count; i++)
{
OsuHitObject currHitObject = beatmap.HitObjects[i];
if (currHitObject.StackHeight != 0 && !(currHitObject is Slider))
continue;
double startTime = (currHitObject as IHasEndTime)?.EndTime ?? currHitObject.StartTime;
int sliderStack = 0;
for (int j = i + 1; j < beatmap.HitObjects.Count; j++)
{
double stackThreshold = beatmap.HitObjects[i].TimePreempt * beatmap.BeatmapInfo.StackLeniency;
if (beatmap.HitObjects[j].StartTime - stackThreshold > startTime)
break;
if (Vector2Extensions.Distance(beatmap.HitObjects[j].Position, currHitObject.Position) < stack_distance)
{
currHitObject.StackHeight++;
startTime = (beatmap.HitObjects[j] as IHasEndTime)?.EndTime ?? beatmap.HitObjects[i].StartTime;
}
else if (Vector2Extensions.Distance(beatmap.HitObjects[j].Position, currHitObject.EndPosition) < stack_distance)
{
//Case for sliders - bump notes down and right, rather than up and left.
sliderStack++;
beatmap.HitObjects[j].StackHeight -= sliderStack;
startTime = (beatmap.HitObjects[j] as IHasEndTime)?.EndTime ?? beatmap.HitObjects[i].StartTime;
}
}
}
}
}
}

2
osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs
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@ -38,7 +38,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
double sectionLength = section_length * timeRate;
// The first object doesn't generate a strain, so we begin with an incremented section end
double currentSectionEnd = 2 * sectionLength;
double currentSectionEnd = Math.Ceiling(beatmap.HitObjects.First().StartTime / sectionLength) * sectionLength;
foreach (OsuDifficultyHitObject h in difficultyBeatmap)
{

4
osu.Game.Rulesets.Osu/Difficulty/Preprocessing/OsuDifficultyBeatmap.cs
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@ -3,6 +3,7 @@
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using osu.Game.Rulesets.Osu.Objects;
namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
@ -23,8 +24,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
{
// Sort OsuHitObjects by StartTime - they are not correctly ordered in some cases.
// This should probably happen before the objects reach the difficulty calculator.
objects.Sort((a, b) => a.StartTime.CompareTo(b.StartTime));
difficultyObjects = createDifficultyObjectEnumerator(objects, timeRate);
difficultyObjects = createDifficultyObjectEnumerator(objects.OrderBy(h => h.StartTime).ToList(), timeRate);
}
/// <summary>

42
osu.Game.Rulesets.Osu/Difficulty/Preprocessing/OsuDifficultyHitObject.cs
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@ -21,15 +21,25 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
public OsuHitObject BaseObject { get; }
/// <summary>
/// Normalized distance from the <see cref="OsuHitObject.StackedPosition"/> of the previous <see cref="OsuDifficultyHitObject"/>.
/// Normalized distance from the end position of the previous <see cref="OsuDifficultyHitObject"/> to the start position of this <see cref="OsuDifficultyHitObject"/>.
/// </summary>
public double Distance { get; private set; }
public double JumpDistance { get; private set; }
/// <summary>
/// Normalized distance between the start and end position of the previous <see cref="OsuDifficultyHitObject"/>.
/// </summary>
public double TravelDistance { get; private set; }
/// <summary>
/// Milliseconds elapsed since the StartTime of the previous <see cref="OsuDifficultyHitObject"/>.
/// </summary>
public double DeltaTime { get; private set; }
/// <summary>
/// Milliseconds elapsed since the start time of the previous <see cref="OsuDifficultyHitObject"/>, with a minimum of 50ms.
/// </summary>
public double StrainTime { get; private set; }
private readonly OsuHitObject lastObject;
private readonly double timeRate;
@ -51,31 +61,37 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
private void setDistances()
{
// We will scale distances by this factor, so we can assume a uniform CircleSize among beatmaps.
double scalingFactor = normalized_radius / BaseObject.Radius;
float scalingFactor = normalized_radius / (float)BaseObject.Radius;
if (BaseObject.Radius < 30)
{
double smallCircleBonus = Math.Min(30 - BaseObject.Radius, 5) / 50;
float smallCircleBonus = Math.Min(30 - (float)BaseObject.Radius, 5) / 50;
scalingFactor *= 1 + smallCircleBonus;
}
Vector2 lastCursorPosition = lastObject.StackedPosition;
float lastTravelDistance = 0;
var lastSlider = lastObject as Slider;
if (lastSlider != null)
{
computeSliderCursorPosition(lastSlider);
lastCursorPosition = lastSlider.LazyEndPosition ?? lastCursorPosition;
lastTravelDistance = lastSlider.LazyTravelDistance;
}
Distance = (lastTravelDistance + (BaseObject.StackedPosition - lastCursorPosition).Length) * scalingFactor;
// Don't need to jump to reach spinners
if (!(BaseObject is Spinner))
JumpDistance = (BaseObject.StackedPosition * scalingFactor - lastCursorPosition * scalingFactor).Length;
// Todo: BUG!!! Last slider's travel distance is considered ONLY IF we ourselves are also a slider!
if (BaseObject is Slider)
TravelDistance = (lastSlider?.LazyTravelDistance ?? 0) * scalingFactor;
}
private void setTimingValues()
{
// Every timing inverval is hard capped at the equivalent of 375 BPM streaming speed as a safety measure.
DeltaTime = Math.Max(50, (BaseObject.StartTime - lastObject.StartTime) / timeRate);
DeltaTime = (BaseObject.StartTime - lastObject.StartTime) / timeRate;
// Every strain interval is hard capped at the equivalent of 375 BPM streaming speed as a safety measure
StrainTime = Math.Max(50, DeltaTime);
}
private void computeSliderCursorPosition(Slider slider)
@ -87,8 +103,14 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
float approxFollowCircleRadius = (float)(slider.Radius * 3);
var computeVertex = new Action<double>(t =>
{
double progress = ((int)t - (int)slider.StartTime) / (float)(int)slider.SpanDuration;
if (progress % 2 > 1)
progress = 1 - progress % 1;
else
progress = progress % 1;
// ReSharper disable once PossibleInvalidOperationException (bugged in current r# version)
var diff = slider.StackedPositionAt(t) - slider.LazyEndPosition.Value;
var diff = slider.StackedPosition + slider.Curve.PositionAt(progress) - slider.LazyEndPosition.Value;
float dist = diff.Length;
if (dist > approxFollowCircleRadius)

3
osu.Game.Rulesets.Osu/Difficulty/Skills/Aim.cs
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@ -14,6 +14,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
protected override double SkillMultiplier => 26.25;
protected override double StrainDecayBase => 0.15;
protected override double StrainValueOf(OsuDifficultyHitObject current) => Math.Pow(current.Distance, 0.99) / current.DeltaTime;
protected override double StrainValueOf(OsuDifficultyHitObject current)
=> (Math.Pow(current.TravelDistance, 0.99) + Math.Pow(current.JumpDistance, 0.99)) / current.StrainTime;
}
}

4
osu.Game.Rulesets.Osu/Difficulty/Skills/Speed.cs
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@ -19,7 +19,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
protected override double StrainValueOf(OsuDifficultyHitObject current)
{
double distance = current.Distance;
double distance = current.TravelDistance + current.JumpDistance;
double speedValue;
if (distance > single_spacing_threshold)
@ -33,7 +33,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
else
speedValue = 0.95;
return speedValue / current.DeltaTime;
return speedValue / current.StrainTime;
}
}
}

2
osu.Game/Beatmaps/ControlPoints/TimingControlPoint.cs
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@ -16,7 +16,7 @@ namespace osu.Game.Beatmaps.ControlPoints
/// <summary>
/// The beat length at this control point.
/// </summary>
public double BeatLength
public virtual double BeatLength
{
get => beatLength;
set => beatLength = MathHelper.Clamp(value, 6, 60000);

14
osu.Game/Beatmaps/Formats/LegacyBeatmapDecoder.cs
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@ -318,12 +318,12 @@ namespace osu.Game.Beatmaps.Formats
if (timingChange)
{
handleTimingControlPoint(new TimingControlPoint
{
Time = time,
BeatLength = beatLength,
TimeSignature = timeSignature
});
var controlPoint = CreateTimingControlPoint();
controlPoint.Time = time;
controlPoint.BeatLength = beatLength;
controlPoint.TimeSignature = timeSignature;
handleTimingControlPoint(controlPoint);
}
handleDifficultyControlPoint(new DifficultyControlPoint
@ -418,6 +418,8 @@ namespace osu.Game.Beatmaps.Formats
private double getOffsetTime(double time) => time + (ApplyOffsets ? offset : 0);
protected virtual TimingControlPoint CreateTimingControlPoint() => new TimingControlPoint();
[Flags]
internal enum EffectFlags
{

37
osu.Game/Beatmaps/Formats/LegacyDifficultyCalculatorBeatmapDecoder.cs Normal file
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@ -0,0 +1,37 @@
// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System.Linq;
using osu.Game.Beatmaps.ControlPoints;
namespace osu.Game.Beatmaps.Formats
{
/// <summary>
/// A <see cref="LegacyBeatmapDecoder"/> built for difficulty calculation of legacy <see cref="Beatmap"/>s
/// <remarks>
/// To use this, the decoder must be registered by the application through <see cref="LegacyDifficultyCalculatorBeatmapDecoder.Register"/>.
/// Doing so will override any existing <see cref="Beatmap"/> decoders.
/// </remarks>
/// </summary>
public class LegacyDifficultyCalculatorBeatmapDecoder : LegacyBeatmapDecoder
{
public LegacyDifficultyCalculatorBeatmapDecoder(int version = LATEST_VERSION)
: base(version)
{
ApplyOffsets = false;
}
public new static void Register()
{
AddDecoder<Beatmap>(@"osu file format v", m => new LegacyDifficultyCalculatorBeatmapDecoder(int.Parse(m.Split('v').Last())));
}
protected override TimingControlPoint CreateTimingControlPoint()
=> new LegacyDifficultyCalculatorControlPoint();
private class LegacyDifficultyCalculatorControlPoint : TimingControlPoint
{
public override double BeatLength { get; set; } = 1000;
}
}
}