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Merge pull request #16280 from apollo-dw/no-combo-scaling

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Remove combo scaling from Aim and Speed from osu! performance calculation
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Bartłomiej Dach 2024-10-07 14:09:30 +02:00 committed by GitHub
commit 6d3eec3563
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GPG Key ID: B5690EEEBB952194
7 changed files with 49 additions and 21 deletions
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12
osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyAttributes.cs
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@ -46,6 +46,12 @@ namespace osu.Game.Rulesets.Osu.Difficulty
[JsonProperty("slider_factor")]
public double SliderFactor { get; set; }
[JsonProperty("aim_difficult_strain_count")]
public double AimDifficultStrainCount { get; set; }
[JsonProperty("speed_difficult_strain_count")]
public double SpeedDifficultStrainCount { get; set; }
/// <summary>
/// The perceived approach rate inclusive of rate-adjusting mods (DT/HT/etc).
/// </summary>
@ -99,6 +105,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty
yield return (ATTRIB_ID_FLASHLIGHT, FlashlightDifficulty);
yield return (ATTRIB_ID_SLIDER_FACTOR, SliderFactor);
yield return (ATTRIB_ID_AIM_DIFFICULT_STRAIN_COUNT, AimDifficultStrainCount);
yield return (ATTRIB_ID_SPEED_DIFFICULT_STRAIN_COUNT, SpeedDifficultStrainCount);
yield return (ATTRIB_ID_SPEED_NOTE_COUNT, SpeedNoteCount);
}
@ -113,8 +122,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty
StarRating = values[ATTRIB_ID_DIFFICULTY];
FlashlightDifficulty = values.GetValueOrDefault(ATTRIB_ID_FLASHLIGHT);
SliderFactor = values[ATTRIB_ID_SLIDER_FACTOR];
AimDifficultStrainCount = values[ATTRIB_ID_AIM_DIFFICULT_STRAIN_COUNT];
SpeedDifficultStrainCount = values[ATTRIB_ID_SPEED_DIFFICULT_STRAIN_COUNT];
SpeedNoteCount = values[ATTRIB_ID_SPEED_NOTE_COUNT];
DrainRate = onlineInfo.DrainRate;
HitCircleCount = onlineInfo.CircleCount;
SliderCount = onlineInfo.SliderCount;

5
osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs
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@ -48,6 +48,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty
double sliderFactor = aimRating > 0 ? aimRatingNoSliders / aimRating : 1;
double aimDifficultyStrainCount = ((OsuStrainSkill)skills[0]).CountDifficultStrains();
double speedDifficultyStrainCount = ((OsuStrainSkill)skills[2]).CountDifficultStrains();
if (mods.Any(m => m is OsuModTouchDevice))
{
aimRating = Math.Pow(aimRating, 0.8);
@ -100,6 +103,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
SpeedNoteCount = speedNotes,
FlashlightDifficulty = flashlightRating,
SliderFactor = sliderFactor,
AimDifficultStrainCount = aimDifficultyStrainCount,
SpeedDifficultStrainCount = speedDifficultyStrainCount,
ApproachRate = preempt > 1200 ? (1800 - preempt) / 120 : (1200 - preempt) / 150 + 5,
OverallDifficulty = (80 - hitWindowGreat) / 6,
DrainRate = drainRate,

14
osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs
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@ -97,11 +97,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
(totalHits > 2000 ? Math.Log10(totalHits / 2000.0) * 0.5 : 0.0);
aimValue *= lengthBonus;
// Penalize misses by assessing # of misses relative to the total # of objects. Default a 3% reduction for any # of misses.
if (effectiveMissCount > 0)
aimValue *= 0.97 * Math.Pow(1 - Math.Pow(effectiveMissCount / totalHits, 0.775), effectiveMissCount);
aimValue *= getComboScalingFactor(attributes);
aimValue *= calculateMissPenalty(effectiveMissCount, attributes.AimDifficultStrainCount);
double approachRateFactor = 0.0;
if (attributes.ApproachRate > 10.33)
@ -150,11 +147,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
(totalHits > 2000 ? Math.Log10(totalHits / 2000.0) * 0.5 : 0.0);
speedValue *= lengthBonus;
// Penalize misses by assessing # of misses relative to the total # of objects. Default a 3% reduction for any # of misses.
if (effectiveMissCount > 0)
speedValue *= 0.97 * Math.Pow(1 - Math.Pow(effectiveMissCount / totalHits, 0.775), Math.Pow(effectiveMissCount, .875));
speedValue *= getComboScalingFactor(attributes);
speedValue *= calculateMissPenalty(effectiveMissCount, attributes.SpeedDifficultStrainCount);
double approachRateFactor = 0.0;
if (attributes.ApproachRate > 10.33)
@ -271,6 +265,10 @@ namespace osu.Game.Rulesets.Osu.Difficulty
return Math.Max(countMiss, comboBasedMissCount);
}
// Miss penalty assumes that a player will miss on the hardest parts of a map,
// so we use the amount of relatively difficult sections to adjust miss penalty
// to make it more punishing on maps with lower amount of hard sections.
private double calculateMissPenalty(double missCount, double difficultStrainCount) => 0.96 / ((missCount / (4 * Math.Pow(Math.Log(difficultStrainCount), 0.94))) + 1);
private double getComboScalingFactor(OsuDifficultyAttributes attributes) => attributes.MaxCombo <= 0 ? 1.0 : Math.Min(Math.Pow(scoreMaxCombo, 0.8) / Math.Pow(attributes.MaxCombo, 0.8), 1.0);
private int totalHits => countGreat + countOk + countMeh + countMiss;
}

1
osu.Game.Rulesets.Osu/Difficulty/Skills/Aim.cs
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@ -34,6 +34,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
{
currentStrain *= strainDecay(current.DeltaTime);
currentStrain += AimEvaluator.EvaluateDifficultyOf(current, withSliders) * skillMultiplier;
ObjectStrains.Add(currentStrain);
return currentStrain;
}

23
osu.Game.Rulesets.Osu/Difficulty/Skills/OsuStrainSkill.cs
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@ -23,6 +23,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
/// </summary>
protected virtual double ReducedStrainBaseline => 0.75;
protected List<double> ObjectStrains = new List<double>();
protected double Difficulty;
protected OsuStrainSkill(Mod[] mods)
: base(mods)
{
@ -30,7 +33,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
public override double DifficultyValue()
{
double difficulty = 0;
Difficulty = 0;
double weight = 1;
// Sections with 0 strain are excluded to avoid worst-case time complexity of the following sort (e.g. /b/2351871).
@ -50,11 +53,25 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
// We're sorting from highest to lowest strain.
foreach (double strain in strains.OrderDescending())
{
difficulty += strain * weight;
Difficulty += strain * weight;
weight *= DecayWeight;
}
return difficulty;
return Difficulty;
}
/// <summary>
/// Returns the number of strains weighted against the top strain.
/// The result is scaled by clock rate as it affects the total number of strains.
/// </summary>
public double CountDifficultStrains()
{
if (Difficulty == 0)
return 0.0;
double consistentTopStrain = Difficulty / 10; // What would the top strain be if all strain values were identical
// Use a weighted sum of all strains. Constants are arbitrary and give nice values
return ObjectStrains.Sum(s => 1.1 / (1 + Math.Exp(-10 * (s / consistentTopStrain - 0.88))));
}
public static double DifficultyToPerformance(double difficulty) => Math.Pow(5.0 * Math.Max(1.0, difficulty / 0.0675) - 4.0, 3.0) / 100000.0;

13
osu.Game.Rulesets.Osu/Difficulty/Skills/Speed.cs
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@ -6,7 +6,6 @@ using osu.Game.Rulesets.Difficulty.Preprocessing;
using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Osu.Difficulty.Evaluators;
using osu.Game.Rulesets.Osu.Difficulty.Preprocessing;
using System.Collections.Generic;
using System.Linq;
namespace osu.Game.Rulesets.Osu.Difficulty.Skills
@ -24,8 +23,6 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
protected override int ReducedSectionCount => 5;
private readonly List<double> objectStrains = new List<double>();
public Speed(Mod[] mods)
: base(mods)
{
@ -43,23 +40,21 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
currentRhythm = RhythmEvaluator.EvaluateDifficultyOf(current);
double totalStrain = currentStrain * currentRhythm;
objectStrains.Add(totalStrain);
ObjectStrains.Add(totalStrain);
return totalStrain;
}
public double RelevantNoteCount()
{
if (objectStrains.Count == 0)
if (ObjectStrains.Count == 0)
return 0;
double maxStrain = objectStrains.Max();
double maxStrain = ObjectStrains.Max();
if (maxStrain == 0)
return 0;
return objectStrains.Sum(strain => 1.0 / (1.0 + Math.Exp(-(strain / maxStrain * 12.0 - 6.0))));
return ObjectStrains.Sum(strain => 1.0 / (1.0 + Math.Exp(-(strain / maxStrain * 12.0 - 6.0))));
}
}
}

2
osu.Game/Rulesets/Difficulty/DifficultyAttributes.cs
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@ -26,6 +26,8 @@ namespace osu.Game.Rulesets.Difficulty
protected const int ATTRIB_ID_FLASHLIGHT = 17;
protected const int ATTRIB_ID_SLIDER_FACTOR = 19;
protected const int ATTRIB_ID_SPEED_NOTE_COUNT = 21;
protected const int ATTRIB_ID_SPEED_DIFFICULT_STRAIN_COUNT = 23;
protected const int ATTRIB_ID_AIM_DIFFICULT_STRAIN_COUNT = 25;
/// <summary>
/// The mods which were applied to the beatmap.