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osu-lazer/osu.Game.Rulesets.Taiko/Difficulty/Skills/Stamina.cs
2020-06-08 16:30:26 +09:00

88 lines
2.6 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.Collections.Generic;
using System.Linq;
using osu.Game.Rulesets.Difficulty.Preprocessing;
using osu.Game.Rulesets.Difficulty.Skills;
using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing;
using osu.Game.Rulesets.Taiko.Objects;
namespace osu.Game.Rulesets.Taiko.Difficulty.Skills
{
public class Stamina : Skill
{
private readonly int hand;
protected override double SkillMultiplier => 1;
protected override double StrainDecayBase => 0.4;
private const int max_history_length = 2;
private readonly List<double> notePairDurationHistory = new List<double>();
private double offhandObjectDuration = double.MaxValue;
// Penalty for tl tap or roll
private double cheesePenalty(double notePairDuration)
{
if (notePairDuration > 125) return 1;
if (notePairDuration < 100) return 0.6;
return 0.6 + (notePairDuration - 100) * 0.016;
}
private double speedBonus(double notePairDuration)
{
if (notePairDuration >= 200) return 0;
double bonus = 200 - notePairDuration;
bonus *= bonus;
return bonus / 100000;
}
protected override double StrainValueOf(DifficultyHitObject current)
{
if (!(current.BaseObject is Hit))
{
return 0.0;
}
TaikoDifficultyHitObject hitObject = (TaikoDifficultyHitObject)current;
if (hitObject.N % 2 == hand)
{
double objectStrain = 1;
if (hitObject.N == 1)
return 1;
notePairDurationHistory.Add(hitObject.NoteLength + offhandObjectDuration);
if (notePairDurationHistory.Count > max_history_length)
notePairDurationHistory.RemoveAt(0);
double shortestRecentNote = notePairDurationHistory.Min();
objectStrain += speedBonus(shortestRecentNote);
if (hitObject.StaminaCheese)
objectStrain *= cheesePenalty(hitObject.NoteLength + offhandObjectDuration);
return objectStrain;
}
offhandObjectDuration = hitObject.NoteLength;
return 0;
}
public Stamina(bool rightHand)
{
hand = 0;
if (rightHand)
{
hand = 1;
}
}
}
}