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Code Issues Releases Wiki Activity

Implement taiko deviation estimation

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This commit is contained in:
Natelytle 2022-10-25 17:41:20 -04:00
parent cc0ca470f1
commit 442e68ac1a
3 changed files with 29 additions and 5 deletions
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3
osu.Game.Rulesets.Taiko/Difficulty/TaikoPerformanceAttributes.cs
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@ -20,6 +20,9 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
[JsonProperty("effective_miss_count")]
public double EffectiveMissCount { get; set; }
[JsonProperty("estimated_ur")]
public double EstimatedUR { get; set; }
public override IEnumerable<PerformanceDisplayAttribute> GetAttributesForDisplay()
{
foreach (var attribute in base.GetAttributesForDisplay())

27
osu.Game.Rulesets.Taiko/Difficulty/TaikoPerformanceCalculator.cs
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@ -11,6 +11,7 @@ using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Scoring;
using osu.Game.Rulesets.Taiko.Objects;
using osu.Game.Scoring;
using MathNet.Numerics;
namespace osu.Game.Rulesets.Taiko.Difficulty
{
@ -21,6 +22,7 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
private int countMeh;
private int countMiss;
private double accuracy;
private double estimatedUR;
private double effectiveMissCount;
@ -37,7 +39,7 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
countOk = score.Statistics.GetValueOrDefault(HitResult.Ok);
countMeh = score.Statistics.GetValueOrDefault(HitResult.Meh);
countMiss = score.Statistics.GetValueOrDefault(HitResult.Miss);
accuracy = customAccuracy;
estimatedUR = 10 * computeEstimatedUR(score, taikoAttributes);
// The effectiveMissCount is calculated by gaining a ratio for totalSuccessfulHits and increasing the miss penalty for shorter object counts lower than 1000.
if (totalSuccessfulHits > 0)
@ -64,6 +66,7 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
Difficulty = difficultyValue,
Accuracy = accuracyValue,
EffectiveMissCount = effectiveMissCount,
EstimatedUR = 10 * estimatedUR,
Total = totalValue
};
}
@ -97,10 +100,9 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
if (attributes.GreatHitWindow <= 0)
return 0;
double accuracyValue = Math.Pow(60.0 / attributes.GreatHitWindow, 1.1) * Math.Pow(accuracy, 8.0) * Math.Pow(attributes.StarRating, 0.4) * 27.0;
double accuracyValue = Math.Pow(75 / estimatedUR, 1.1) * Math.Pow(attributes.StarRating, 0.4) * 70.0;
double lengthBonus = Math.Min(1.15, Math.Pow(totalHits / 1500.0, 0.3));
accuracyValue *= lengthBonus;
// Slight HDFL Bonus for accuracy. A clamp is used to prevent against negative values
if (score.Mods.Any(m => m is ModFlashlight<TaikoHitObject>) && score.Mods.Any(m => m is ModHidden))
@ -109,10 +111,25 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
return accuracyValue;
}
private double computeEstimatedUR(ScoreInfo score, TaikoDifficultyAttributes attributes)
{
if (totalHits == 0)
return double.PositiveInfinity;
double greatProbability = 1 - (countOk + countMiss + 1.0) / (totalHits + 1.0);
if (greatProbability <= 0)
{
return double.PositiveInfinity;
}
double deviation = attributes.GreatHitWindow / (Math.Sqrt(2) * SpecialFunctions.ErfInv(greatProbability));
return deviation;
}
private int totalHits => countGreat + countOk + countMeh + countMiss;
private int totalSuccessfulHits => countGreat + countOk + countMeh;
private double customAccuracy => totalHits > 0 ? (countGreat * 300 + countOk * 150) / (totalHits * 300.0) : 0;
}
}

4
osu.Game.Rulesets.Taiko/osu.Game.Rulesets.Taiko.csproj
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@ -15,4 +15,8 @@
<ItemGroup Label="Project References">
<ProjectReference Include="..\osu.Game\osu.Game.csproj" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="MathNet.Numerics" Version="5.0.0" />
</ItemGroup>
</Project>