mirror of
https://github.com/ppy/osu.git
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200 lines
8.8 KiB
C#
200 lines
8.8 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using osu.Game.Rulesets.Difficulty;
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using osu.Game.Rulesets.Mods;
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using osu.Game.Rulesets.Osu.Mods;
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using osu.Game.Rulesets.Scoring;
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using osu.Game.Scoring;
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namespace osu.Game.Rulesets.Osu.Difficulty
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{
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public class OsuPerformanceCalculator : PerformanceCalculator
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{
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public new OsuDifficultyAttributes Attributes => (OsuDifficultyAttributes)base.Attributes;
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private Mod[] mods;
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private double accuracy;
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private int scoreMaxCombo;
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private int countGreat;
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private int countOk;
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private int countMeh;
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private int countMiss;
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public OsuPerformanceCalculator(Ruleset ruleset, DifficultyAttributes attributes, ScoreInfo score)
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: base(ruleset, attributes, score)
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{
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}
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public override double Calculate(Dictionary<string, double> categoryRatings = null)
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{
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mods = Score.Mods;
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accuracy = Score.Accuracy;
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scoreMaxCombo = Score.MaxCombo;
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countGreat = Score.Statistics.GetValueOrDefault(HitResult.Great);
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countOk = Score.Statistics.GetValueOrDefault(HitResult.Ok);
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countMeh = Score.Statistics.GetValueOrDefault(HitResult.Meh);
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countMiss = Score.Statistics.GetValueOrDefault(HitResult.Miss);
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// Custom multipliers for NoFail and SpunOut.
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double multiplier = 1.12; // This is being adjusted to keep the final pp value scaled around what it used to be when changing things
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if (mods.Any(m => m is OsuModNoFail))
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multiplier *= Math.Max(0.90, 1.0 - 0.02 * countMiss);
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if (mods.Any(m => m is OsuModSpunOut))
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multiplier *= 1.0 - Math.Pow((double)Attributes.SpinnerCount / totalHits, 0.85);
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double aimValue = computeAimValue();
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double speedValue = computeSpeedValue();
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double accuracyValue = computeAccuracyValue();
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double totalValue =
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Math.Pow(
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Math.Pow(aimValue, 1.1) +
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Math.Pow(speedValue, 1.1) +
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Math.Pow(accuracyValue, 1.1), 1.0 / 1.1
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) * multiplier;
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if (categoryRatings != null)
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{
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categoryRatings.Add("Aim", aimValue);
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categoryRatings.Add("Speed", speedValue);
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categoryRatings.Add("Accuracy", accuracyValue);
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categoryRatings.Add("OD", Attributes.OverallDifficulty);
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categoryRatings.Add("AR", Attributes.ApproachRate);
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categoryRatings.Add("Max Combo", Attributes.MaxCombo);
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}
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return totalValue;
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}
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private double computeAimValue()
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{
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double rawAim = Attributes.AimStrain;
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if (mods.Any(m => m is OsuModTouchDevice))
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rawAim = Math.Pow(rawAim, 0.8);
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double aimValue = Math.Pow(5.0 * Math.Max(1.0, rawAim / 0.0675) - 4.0, 3.0) / 100000.0;
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// Longer maps are worth more
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double lengthBonus = 0.95 + 0.4 * Math.Min(1.0, totalHits / 2000.0) +
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(totalHits > 2000 ? Math.Log10(totalHits / 2000.0) * 0.5 : 0.0);
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aimValue *= lengthBonus;
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// Penalize misses by assessing # of misses relative to the total # of objects. Default a 3% reduction for any # of misses.
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if (countMiss > 0)
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aimValue *= 0.97 * Math.Pow(1 - Math.Pow((double)countMiss / totalHits, 0.775), countMiss);
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// Combo scaling
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if (Attributes.MaxCombo > 0)
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aimValue *= Math.Min(Math.Pow(scoreMaxCombo, 0.8) / Math.Pow(Attributes.MaxCombo, 0.8), 1.0);
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double approachRateFactor = 0.0;
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if (Attributes.ApproachRate > 10.33)
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approachRateFactor = Attributes.ApproachRate - 10.33;
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else if (Attributes.ApproachRate < 8.0)
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approachRateFactor = 0.025 * (8.0 - Attributes.ApproachRate);
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double approachRateTotalHitsFactor = 1.0 / (1.0 + Math.Exp(-(0.007 * (totalHits - 400))));
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aimValue *= 1.0 + (0.03 + 0.37 * approachRateTotalHitsFactor) * approachRateFactor;
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// We want to give more reward for lower AR when it comes to aim and HD. This nerfs high AR and buffs lower AR.
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if (mods.Any(h => h is OsuModHidden))
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aimValue *= 1.0 + 0.04 * (12.0 - Attributes.ApproachRate);
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if (mods.Any(h => h is OsuModFlashlight))
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{
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// Apply object-based bonus for flashlight.
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aimValue *= 1.0 + 0.35 * Math.Min(1.0, totalHits / 200.0) +
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(totalHits > 200
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? 0.3 * Math.Min(1.0, (totalHits - 200) / 300.0) +
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(totalHits > 500 ? (totalHits - 500) / 1200.0 : 0.0)
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: 0.0);
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}
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// Scale the aim value with accuracy _slightly_
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aimValue *= 0.5 + accuracy / 2.0;
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// It is important to also consider accuracy difficulty when doing that
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aimValue *= 0.98 + Math.Pow(Attributes.OverallDifficulty, 2) / 2500;
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return aimValue;
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}
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private double computeSpeedValue()
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{
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double speedValue = Math.Pow(5.0 * Math.Max(1.0, Attributes.SpeedStrain / 0.0675) - 4.0, 3.0) / 100000.0;
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// Longer maps are worth more
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double lengthBonus = 0.95 + 0.4 * Math.Min(1.0, totalHits / 2000.0) +
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(totalHits > 2000 ? Math.Log10(totalHits / 2000.0) * 0.5 : 0.0);
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speedValue *= lengthBonus;
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// Penalize misses by assessing # of misses relative to the total # of objects. Default a 3% reduction for any # of misses.
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if (countMiss > 0)
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speedValue *= 0.97 * Math.Pow(1 - Math.Pow((double)countMiss / totalHits, 0.775), Math.Pow(countMiss, .875));
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// Combo scaling
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if (Attributes.MaxCombo > 0)
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speedValue *= Math.Min(Math.Pow(scoreMaxCombo, 0.8) / Math.Pow(Attributes.MaxCombo, 0.8), 1.0);
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double approachRateFactor = 0.0;
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if (Attributes.ApproachRate > 10.33)
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approachRateFactor = Attributes.ApproachRate - 10.33;
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double approachRateTotalHitsFactor = 1.0 / (1.0 + Math.Exp(-(0.007 * (totalHits - 400))));
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speedValue *= 1.0 + (0.03 + 0.37 * approachRateTotalHitsFactor) * approachRateFactor;
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if (mods.Any(m => m is OsuModHidden))
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speedValue *= 1.0 + 0.04 * (12.0 - Attributes.ApproachRate);
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// Scale the speed value with accuracy and OD
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speedValue *= (0.95 + Math.Pow(Attributes.OverallDifficulty, 2) / 750) * Math.Pow(accuracy, (14.5 - Math.Max(Attributes.OverallDifficulty, 8)) / 2);
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// Scale the speed value with # of 50s to punish doubletapping.
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speedValue *= Math.Pow(0.98, countMeh < totalHits / 500.0 ? 0 : countMeh - totalHits / 500.0);
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return speedValue;
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}
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private double computeAccuracyValue()
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{
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// This percentage only considers HitCircles of any value - in this part of the calculation we focus on hitting the timing hit window
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double betterAccuracyPercentage;
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int amountHitObjectsWithAccuracy = Attributes.HitCircleCount;
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if (amountHitObjectsWithAccuracy > 0)
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betterAccuracyPercentage = ((countGreat - (totalHits - amountHitObjectsWithAccuracy)) * 6 + countOk * 2 + countMeh) / (double)(amountHitObjectsWithAccuracy * 6);
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else
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betterAccuracyPercentage = 0;
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// It is possible to reach a negative accuracy with this formula. Cap it at zero - zero points
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if (betterAccuracyPercentage < 0)
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betterAccuracyPercentage = 0;
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// Lots of arbitrary values from testing.
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// Considering to use derivation from perfect accuracy in a probabilistic manner - assume normal distribution
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double accuracyValue = Math.Pow(1.52163, Attributes.OverallDifficulty) * Math.Pow(betterAccuracyPercentage, 24) * 2.83;
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// Bonus for many hitcircles - it's harder to keep good accuracy up for longer
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accuracyValue *= Math.Min(1.15, Math.Pow(amountHitObjectsWithAccuracy / 1000.0, 0.3));
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if (mods.Any(m => m is OsuModHidden))
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accuracyValue *= 1.08;
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if (mods.Any(m => m is OsuModFlashlight))
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accuracyValue *= 1.02;
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return accuracyValue;
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}
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private int totalHits => countGreat + countOk + countMeh + countMiss;
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private int totalSuccessfulHits => countGreat + countOk + countMeh;
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}
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}
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