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210 lines
8.6 KiB
C#
210 lines
8.6 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.Beatmaps;
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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.Osu.Objects;
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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 readonly int countHitCircles;
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private readonly int beatmapMaxCombo;
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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 countGood;
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private int countMeh;
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private int countMiss;
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public OsuPerformanceCalculator(Ruleset ruleset, WorkingBeatmap beatmap, ScoreInfo score)
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: base(ruleset, beatmap, score)
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{
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countHitCircles = Beatmap.HitObjects.Count(h => h is HitCircle);
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beatmapMaxCombo = Beatmap.HitObjects.Count;
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// Add the ticks + tail of the slider. 1 is subtracted because the "headcircle" would be counted twice (once for the slider itself in the line above)
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beatmapMaxCombo += Beatmap.HitObjects.OfType<Slider>().Sum(s => s.NestedHitObjects.Count - 1);
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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[HitResult.Great];
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countGood = Score.Statistics[HitResult.Good];
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countMeh = Score.Statistics[HitResult.Meh];
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countMiss = Score.Statistics[HitResult.Miss];
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// Don't count scores made with supposedly unranked mods
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if (mods.Any(m => !m.Ranked))
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return 0;
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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 *= 0.90;
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if (mods.Any(m => m is OsuModSpunOut))
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multiplier *= 0.95;
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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", beatmapMaxCombo);
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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 exponentially. This mainly fixes tag4 maps and the likes until a per-hitobject solution is available
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aimValue *= Math.Pow(0.97, countMiss);
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// Combo scaling
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if (beatmapMaxCombo > 0)
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aimValue *= Math.Min(Math.Pow(scoreMaxCombo, 0.8) / Math.Pow(beatmapMaxCombo, 0.8), 1.0);
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double approachRateFactor = 1.0;
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if (Attributes.ApproachRate > 10.33)
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approachRateFactor += 0.3 * (Attributes.ApproachRate - 10.33);
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else if (Attributes.ApproachRate < 8.0)
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{
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approachRateFactor += 0.01 * (8.0 - Attributes.ApproachRate);
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}
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aimValue *= 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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speedValue *= 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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// Penalize misses exponentially. This mainly fixes tag4 maps and the likes until a per-hitobject solution is available
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speedValue *= Math.Pow(0.97, countMiss);
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// Combo scaling
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if (beatmapMaxCombo > 0)
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speedValue *= Math.Min(Math.Pow(scoreMaxCombo, 0.8) / Math.Pow(beatmapMaxCombo, 0.8), 1.0);
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double approachRateFactor = 1.0;
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if (Attributes.ApproachRate > 10.33)
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approachRateFactor += 0.3 * (Attributes.ApproachRate - 10.33);
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speedValue *= 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 _slightly_
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speedValue *= 0.02 + accuracy;
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// It is important to also consider accuracy difficulty when doing that
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speedValue *= 0.96 + Math.Pow(Attributes.OverallDifficulty, 2) / 1600;
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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 = countHitCircles;
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if (amountHitObjectsWithAccuracy > 0)
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betterAccuracyPercentage = ((countGreat - (totalHits - amountHitObjectsWithAccuracy)) * 6 + countGood * 2 + countMeh) / (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 double totalHits => countGreat + countGood + countMeh + countMiss;
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private double totalSuccessfulHits => countGreat + countGood + countMeh;
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}
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}
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