From 86ffa810a9628ace6daaee54244e41dde0297563 Mon Sep 17 00:00:00 2001 From: vun Date: Tue, 31 May 2022 23:17:39 +0800 Subject: [PATCH] Implement stamina evaluator (untested yet) --- .../Difficulty/Evaluators/StaminaEvaluator.cs | 64 +++++++++++++++++++ .../Difficulty/Skills/SingleKeyStamina.cs | 42 ------------ .../Difficulty/Skills/Stamina.cs | 48 +------------- 3 files changed, 66 insertions(+), 88 deletions(-) create mode 100644 osu.Game.Rulesets.Taiko/Difficulty/Evaluators/StaminaEvaluator.cs delete mode 100644 osu.Game.Rulesets.Taiko/Difficulty/Skills/SingleKeyStamina.cs diff --git a/osu.Game.Rulesets.Taiko/Difficulty/Evaluators/StaminaEvaluator.cs b/osu.Game.Rulesets.Taiko/Difficulty/Evaluators/StaminaEvaluator.cs new file mode 100644 index 0000000000..a2f6b860f6 --- /dev/null +++ b/osu.Game.Rulesets.Taiko/Difficulty/Evaluators/StaminaEvaluator.cs @@ -0,0 +1,64 @@ +// Copyright (c) ppy Pty Ltd . Licensed under the MIT Licence. +// See the LICENCE file in the repository root for full licence text. + +using osu.Game.Rulesets.Difficulty.Preprocessing; +using osu.Game.Rulesets.Difficulty.Skills; +using osu.Game.Rulesets.Mods; +using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing; +using osu.Game.Rulesets.Taiko.Objects; + +namespace osu.Game.Rulesets.Taiko.Difficulty.Evaluators +{ + public class StaminaEvaluator + { + /// + /// Applies a speed bonus dependent on the time since the last hit performed using this key. + /// + /// The duration between the current and previous note hit using the same key. + private static double speedBonus(double notePairDuration) + { + return 175 / (notePairDuration + 100); + } + + /// + /// Evaluates the minimum mechanical stamina required to play the current object. This is calculated using the + /// maximum possible interval between two hits using the same key, by alternating 2 keys for each colour. + /// + public static double EvaluateDifficultyOf(DifficultyHitObject current) + { + if (!(current.BaseObject is Hit)) + { + return 0.0; + } + + // Find the previous hit object hit by the current key, which is two notes of the same colour prior. + // TODO: This could result in potential performance issue where it has to check the colour of a large amount + // of objects due to previous objects being mono of the other colour. A potential fix for this would be + // to store two separate lists of previous objects, one for each colour. + TaikoDifficultyHitObject taikoCurrent = (TaikoDifficultyHitObject)current; + TaikoDifficultyHitObject previous = taikoCurrent; + int monoNoteInterval = 2; // The amount of same-colour notes to go back + double currentKeyInterval = 0; // Interval of the current key being pressed + do + { + previous = (TaikoDifficultyHitObject)previous.Previous(1); + if (previous.BaseObject is Hit && previous.HitType == taikoCurrent.HitType) + { + --monoNoteInterval; + } + currentKeyInterval += previous.DeltaTime; + + } while (previous != null && monoNoteInterval > 0); + + // This note is the first press of the current key + if (monoNoteInterval > 0) + { + return 0; + } + + double objectStrain = 0.5; + objectStrain += speedBonus(currentKeyInterval); + return objectStrain; + } + } +} diff --git a/osu.Game.Rulesets.Taiko/Difficulty/Skills/SingleKeyStamina.cs b/osu.Game.Rulesets.Taiko/Difficulty/Skills/SingleKeyStamina.cs deleted file mode 100644 index cabfd231d8..0000000000 --- a/osu.Game.Rulesets.Taiko/Difficulty/Skills/SingleKeyStamina.cs +++ /dev/null @@ -1,42 +0,0 @@ -// Copyright (c) ppy Pty Ltd . Licensed under the MIT Licence. -// See the LICENCE file in the repository root for full licence text. - -using osu.Game.Rulesets.Difficulty.Preprocessing; -using osu.Game.Rulesets.Difficulty.Skills; - -namespace osu.Game.Rulesets.Taiko.Difficulty.Skills -{ - /// - /// Stamina of a single key, calculated based on repetition speed. - /// - public class SingleKeyStamina - { - private double? previousHitTime; - - /// - /// Similar to - /// - public double StrainValueOf(DifficultyHitObject current) - { - if (previousHitTime == null) - { - previousHitTime = current.StartTime; - return 0; - } - - double objectStrain = 0.5; - objectStrain += speedBonus(current.StartTime - previousHitTime.Value); - previousHitTime = current.StartTime; - return objectStrain; - } - - /// - /// Applies a speed bonus dependent on the time since the last hit performed using this key. - /// - /// The duration between the current and previous note hit using the same key. - private double speedBonus(double notePairDuration) - { - return 175 / (notePairDuration + 100); - } - } -} diff --git a/osu.Game.Rulesets.Taiko/Difficulty/Skills/Stamina.cs b/osu.Game.Rulesets.Taiko/Difficulty/Skills/Stamina.cs index 61bcbfa59d..71713bcd56 100644 --- a/osu.Game.Rulesets.Taiko/Difficulty/Skills/Stamina.cs +++ b/osu.Game.Rulesets.Taiko/Difficulty/Skills/Stamina.cs @@ -4,6 +4,7 @@ using osu.Game.Rulesets.Difficulty.Preprocessing; using osu.Game.Rulesets.Difficulty.Skills; using osu.Game.Rulesets.Mods; +using osu.Game.Rulesets.Taiko.Difficulty.Evaluators; using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing; using osu.Game.Rulesets.Taiko.Objects; @@ -20,28 +21,6 @@ namespace osu.Game.Rulesets.Taiko.Difficulty.Skills protected override double SkillMultiplier => 1; protected override double StrainDecayBase => 0.4; - private readonly SingleKeyStamina[] centreKeyStamina = - { - new SingleKeyStamina(), - new SingleKeyStamina() - }; - - private readonly SingleKeyStamina[] rimKeyStamina = - { - new SingleKeyStamina(), - new SingleKeyStamina() - }; - - /// - /// Current index into for a centre hit. - /// - private int centreKeyIndex; - - /// - /// Current index into for a rim hit. - /// - private int rimKeyIndex; - /// /// Creates a skill. /// @@ -51,32 +30,9 @@ namespace osu.Game.Rulesets.Taiko.Difficulty.Skills { } - /// - /// Get the next to use for the given . - /// - /// The current . - private SingleKeyStamina getNextSingleKeyStamina(TaikoDifficultyHitObject current) - { - // Alternate key for the same color. - if (current.HitType == HitType.Centre) - { - centreKeyIndex = (centreKeyIndex + 1) % 2; - return centreKeyStamina[centreKeyIndex]; - } - - rimKeyIndex = (rimKeyIndex + 1) % 2; - return rimKeyStamina[rimKeyIndex]; - } - protected override double StrainValueOf(DifficultyHitObject current) { - if (!(current.BaseObject is Hit)) - { - return 0.0; - } - - TaikoDifficultyHitObject hitObject = (TaikoDifficultyHitObject)current; - return getNextSingleKeyStamina(hitObject).StrainValueOf(hitObject); + return StaminaEvaluator.EvaluateDifficultyOf(current); } } }