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Code Issues Releases Wiki Activity

Implement stamina evaluator (untested yet)

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vun 2022-05-31 23:17:39 +08:00
parent 66a6467403
commit 86ffa810a9
3 changed files with 66 additions and 88 deletions
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64
osu.Game.Rulesets.Taiko/Difficulty/Evaluators/StaminaEvaluator.cs Normal file
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@ -0,0 +1,64 @@
// 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 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
{
/// <summary>
/// Applies a speed bonus dependent on the time since the last hit performed using this key.
/// </summary>
/// <param name="notePairDuration">The duration between the current and previous note hit using the same key.</param>
private static double speedBonus(double notePairDuration)
{
return 175 / (notePairDuration + 100);
}
/// <summary>
/// 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.
/// </summary>
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;
}
}
}

42
osu.Game.Rulesets.Taiko/Difficulty/Skills/SingleKeyStamina.cs
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@ -1,42 +0,0 @@
// 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 osu.Game.Rulesets.Difficulty.Preprocessing;
using osu.Game.Rulesets.Difficulty.Skills;
namespace osu.Game.Rulesets.Taiko.Difficulty.Skills
{
/// <summary>
/// Stamina of a single key, calculated based on repetition speed.
/// </summary>
public class SingleKeyStamina
{
private double? previousHitTime;
/// <summary>
/// Similar to <see cref="StrainDecaySkill.StrainValueOf"/>
/// </summary>
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;
}
/// <summary>
/// Applies a speed bonus dependent on the time since the last hit performed using this key.
/// </summary>
/// <param name="notePairDuration">The duration between the current and previous note hit using the same key.</param>
private double speedBonus(double notePairDuration)
{
return 175 / (notePairDuration + 100);
}
}
}

48
osu.Game.Rulesets.Taiko/Difficulty/Skills/Stamina.cs
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@ -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()
};
/// <summary>
/// Current index into <see cref="centreKeyStamina" /> for a centre hit.
/// </summary>
private int centreKeyIndex;
/// <summary>
/// Current index into <see cref="rimKeyStamina" /> for a rim hit.
/// </summary>
private int rimKeyIndex;
/// <summary>
/// Creates a <see cref="Stamina"/> skill.
/// </summary>
@ -51,32 +30,9 @@ namespace osu.Game.Rulesets.Taiko.Difficulty.Skills
{
}
/// <summary>
/// Get the next <see cref="SingleKeyStamina"/> to use for the given <see cref="TaikoDifficultyHitObject"/>.
/// </summary>
/// <param name="current">The current <see cref="TaikoDifficultyHitObject"/>.</param>
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);
}
}
}