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osu-lazer/osu.Game.Rulesets.Catch/Difficulty/CatchPerformanceCalculator.cs
2021-07-18 21:52:16 +02:00

102 lines
4.3 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.Collections.Generic;
using System.Linq;
using osu.Game.Rulesets.Difficulty;
using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Scoring;
using osu.Game.Scoring;
namespace osu.Game.Rulesets.Catch.Difficulty
{
public class CatchPerformanceCalculator : PerformanceCalculator
{
protected new CatchDifficultyAttributes Attributes => (CatchDifficultyAttributes)base.Attributes;
private Mod[] mods;
private int fruitsHit;
private int ticksHit;
private int tinyTicksHit;
private int tinyTicksMissed;
private int misses;
public CatchPerformanceCalculator(Ruleset ruleset, DifficultyAttributes attributes, ScoreInfo score)
: base(ruleset, attributes, score)
{
}
public override double Calculate(Dictionary<string, double> categoryDifficulty = null)
{
mods = Score.Mods;
fruitsHit = Score.Statistics.GetValueOrDefault(HitResult.Great);
ticksHit = Score.Statistics.GetValueOrDefault(HitResult.LargeTickHit);
tinyTicksHit = Score.Statistics.GetValueOrDefault(HitResult.SmallTickHit);
tinyTicksMissed = Score.Statistics.GetValueOrDefault(HitResult.SmallTickMiss);
misses = Score.Statistics.GetValueOrDefault(HitResult.Miss);
// We are heavily relying on aim in catch the beat
double value = Math.Pow(5.0 * Math.Max(1.0, Attributes.StarRating / 0.0049) - 4.0, 2.0) / 100000.0;
// Longer maps are worth more. "Longer" means how many hits there are which can contribute to combo
int numTotalHits = totalComboHits();
// Longer maps are worth more
double lengthBonus =
0.95 + 0.3 * Math.Min(1.0, numTotalHits / 2500.0) +
(numTotalHits > 2500 ? Math.Log10(numTotalHits / 2500.0) * 0.475 : 0.0);
// Longer maps are worth more
value *= lengthBonus;
// Penalize misses exponentially. This mainly fixes tag4 maps and the likes until a per-hitobject solution is available
value *= Math.Pow(0.97, misses);
// Combo scaling
if (Attributes.MaxCombo > 0)
value *= Math.Min(Math.Pow(Score.MaxCombo, 0.8) / Math.Pow(Attributes.MaxCombo, 0.8), 1.0);
double approachRate = Attributes.ApproachRate;
double approachRateFactor = 1.0;
if (approachRate > 9.0)
approachRateFactor += 0.1 * (approachRate - 9.0); // 10% for each AR above 9
if (approachRate > 10.0)
approachRateFactor += 0.1 * (approachRate - 10.0); // Additional 10% at AR 11, 30% total
else if (approachRate < 8.0)
approachRateFactor += 0.025 * (8.0 - approachRate); // 2.5% for each AR below 8
value *= approachRateFactor;
if (mods.Any(m => m is ModHidden))
{
// Hiddens gives almost nothing on max approach rate, and more the lower it is
if (approachRate <= 10.0)
value *= 1.05 + 0.075 * (10.0 - approachRate); // 7.5% for each AR below 10
else if (approachRate > 10.0)
value *= 1.01 + 0.04 * (11.0 - Math.Min(11.0, approachRate)); // 5% at AR 10, 1% at AR 11
}
if (mods.Any(m => m is ModFlashlight))
// Apply length bonus again if flashlight is on simply because it becomes a lot harder on longer maps.
value *= 1.35 * lengthBonus;
// Scale the aim value with accuracy _slightly_
value *= Math.Pow(accuracy(), 5.5);
// Custom multipliers for NoFail. SpunOut is not applicable.
if (mods.Any(m => m is ModNoFail))
value *= 0.90;
return value;
}
private double accuracy() => totalHits() == 0 ? 0 : Math.Clamp((double)totalSuccessfulHits() / totalHits(), 0, 1);
private int totalHits() => tinyTicksHit + ticksHit + fruitsHit + misses + tinyTicksMissed;
private int totalSuccessfulHits() => tinyTicksHit + ticksHit + fruitsHit;
private int totalComboHits() => misses + ticksHit + fruitsHit;
}
}