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osu-lazer/osu.Game.Rulesets.Osu/Scoring/OsuPerformanceCalculator.cs
2017-11-17 14:37:19 +09:00

190 lines
8.1 KiB
C#

// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System;
using System.Collections.Generic;
using System.Linq;
using osu.Framework.Extensions.IEnumerableExtensions;
using osu.Game.Beatmaps;
using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Osu.Beatmaps;
using osu.Game.Rulesets.Osu.Mods;
using osu.Game.Rulesets.Osu.Objects;
using osu.Game.Rulesets.Scoring;
namespace osu.Game.Rulesets.Osu.Scoring
{
public class OsuPerformanceCalculator : PerformanceCalculator<OsuHitObject>
{
private readonly int countHitCircles;
private readonly int beatmapMaxCombo;
private Mod[] mods;
private double accuracy;
private int scoreMaxCombo;
private int count300;
private int count100;
private int count50;
private int countMiss;
public OsuPerformanceCalculator(Ruleset ruleset, Beatmap beatmap, Score score)
: base(ruleset, beatmap, score)
{
countHitCircles = Beatmap.HitObjects.Count(h => h is HitCircle);
beatmapMaxCombo = Beatmap.HitObjects.Count();
beatmapMaxCombo += Beatmap.HitObjects.OfType<Slider>().Sum(s => s.RepeatCount + s.Ticks.Count());
}
public override double Calculate(Dictionary<string, string> categoryRatings = null)
{
mods = Score.Mods;
accuracy = Score.Accuracy;
scoreMaxCombo = Score.MaxCombo;
count300 = Convert.ToInt32(Score.Statistics["300"]);
count100 = Convert.ToInt32(Score.Statistics["100"]);
count50 = Convert.ToInt32(Score.Statistics["50"]);
countMiss = Convert.ToInt32(Score.Statistics["x"]);
// Don't count scores made with supposedly unranked mods
if (mods.Any(m => m is OsuModRelax || m is OsuModAutopilot || m is OsuModAutoplay))
return 0;
// Custom multipliers for NoFail and SpunOut.
double multiplier = 1.12f; // This is being adjusted to keep the final pp value scaled around what it used to be when changing things
if (mods.Any(m => m is OsuModNoFail))
multiplier *= 0.90f;
if (mods.Any(m => m is OsuModSpunOut))
multiplier *= 0.95f;
double aimValue = computeAimValue();
double speedValue = computeSpeedValue();
double accuracyValue = computeAccuracyValue();
double totalValue =
Math.Pow(
Math.Pow(aimValue, 1.1f) +
Math.Pow(speedValue, 1.1f) +
Math.Pow(accuracyValue, 1.1f), 1.0f / 1.1f
) * multiplier;
if (categoryRatings != null)
{
categoryRatings.Add("Aim", aimValue.ToString("0.00"));
categoryRatings.Add("Speed", speedValue.ToString("0.00"));
categoryRatings.Add("Accuracy", accuracyValue.ToString("0.00"));
}
return totalValue;
}
private double computeAimValue()
{
double aimValue = Math.Pow(5.0f * Math.Max(1.0f, double.Parse(Attributes["Aim"]) / 0.0675f) - 4.0f, 3.0f) / 100000.0f;
// Longer maps are worth more
double LengthBonus = 0.95f + 0.4f * Math.Min(1.0f, totalHits / 2000.0f) +
(totalHits > 2000 ? Math.Log10(totalHits / 2000.0f) * 0.5f : 0.0f);
aimValue *= LengthBonus;
// Penalize misses exponentially. This mainly fixes tag4 maps and the likes until a per-hitobject solution is available
aimValue *= Math.Pow(0.97f, countMiss);
// Combo scaling
if (beatmapMaxCombo > 0)
aimValue *= Math.Min(Math.Pow(scoreMaxCombo, 0.8f) / Math.Pow(beatmapMaxCombo, 0.8f), 1.0f);
double approachRate = Beatmap.BeatmapInfo.BaseDifficulty.ApproachRate;
double approachRateFactor = 1.0f;
if (approachRate > 10.33f)
approachRateFactor += 0.45f * (approachRate - 10.33f);
else if (approachRate < 8.0f)
{
// HD is worth more with lower ar!
if (mods.Any(h => h is OsuModHidden))
approachRateFactor += 0.02f * (8.0f - approachRate);
else
approachRateFactor += 0.01f * (8.0f - approachRate);
}
aimValue *= approachRateFactor;
if (mods.Any(h => h is OsuModHidden))
aimValue *= 1.18f;
if (mods.Any(h => h is OsuModFlashlight))
{
// Apply length bonus again if flashlight is on simply because it becomes a lot harder on longer maps.
aimValue *= 1.45f * LengthBonus;
}
// Scale the aim value with accuracy _slightly_
aimValue *= 0.5f + accuracy / 2.0f;
// It is important to also consider accuracy difficulty when doing that
aimValue *= 0.98f + (Math.Pow(Beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty, 2) / 2500);
return aimValue;
}
private double computeSpeedValue()
{
double speedValue = Math.Pow(5.0f * Math.Max(1.0f, double.Parse(Attributes["Speed"]) / 0.0675f) - 4.0f, 3.0f) / 100000.0f;
// Longer maps are worth more
speedValue *= 0.95f + 0.4f * Math.Min(1.0f, totalHits / 2000.0f) +
(totalHits > 2000 ? Math.Log10(totalHits / 2000.0f) * 0.5f : 0.0f);
// Penalize misses exponentially. This mainly fixes tag4 maps and the likes until a per-hitobject solution is available
speedValue *= Math.Pow(0.97f, countMiss);
// Combo scaling
if (beatmapMaxCombo > 0)
speedValue *= Math.Min(Math.Pow(scoreMaxCombo, 0.8f) / Math.Pow(beatmapMaxCombo, 0.8f), 1.0f);
// Scale the speed value with accuracy _slightly_
speedValue *= 0.5f + accuracy / 2.0f;
// It is important to also consider accuracy difficulty when doing that
speedValue *= 0.98f + (Math.Pow(Beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty, 2) / 2500);
return speedValue;
}
private double computeAccuracyValue()
{
// This percentage only considers HitCircles of any value - in this part of the calculation we focus on hitting the timing hit window
double betterAccuracyPercentage = 0;
int amountHitObjectsWithAccuracy = countHitCircles;
if (amountHitObjectsWithAccuracy > 0)
betterAccuracyPercentage = ((count300 - (totalHits - amountHitObjectsWithAccuracy)) * 6 + count100 * 2 + count50) / (amountHitObjectsWithAccuracy * 6);
else
betterAccuracyPercentage = 0;
// It is possible to reach a negative accuracy with this formula. Cap it at zero - zero points
if (betterAccuracyPercentage < 0)
betterAccuracyPercentage = 0;
// Lots of arbitrary values from testing.
// Considering to use derivation from perfect accuracy in a probabilistic manner - assume normal distribution
double accuracyValue = Math.Pow(1.52163f, Beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty) * Math.Pow(betterAccuracyPercentage, 24) * 2.83f;
// Bonus for many hitcircles - it's harder to keep good accuracy up for longer
accuracyValue *= Math.Min(1.15f, Math.Pow(amountHitObjectsWithAccuracy / 1000.0f, 0.3f));
if (mods.Any(m => m is OsuModHidden))
accuracyValue *= 1.02f;
if (mods.Any(m => m is OsuModFlashlight))
accuracyValue *= 1.02f;
return accuracyValue;
}
private double totalHits => count300 + count100 + count50 + countMiss;
private double totalSuccessfulHits => count300 + count100 + count50;
protected override BeatmapConverter<OsuHitObject> CreateBeatmapConverter() => new OsuBeatmapConverter();
}
}