osu/osu.Game.Rulesets.Catch/Difficulty/CatchPerformanceCalculator.cs

94 lines
3.8 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
{
private int fruitsHit;
private int ticksHit;
private int tinyTicksHit;
private int tinyTicksMissed;
private int misses;
public CatchPerformanceCalculator()
: base(new CatchRuleset())
{
}
protected override PerformanceAttributes CreatePerformanceAttributes(ScoreInfo score, DifficultyAttributes attributes)
{
var catchAttributes = (CatchDifficultyAttributes)attributes;
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, catchAttributes.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();
double lengthBonus =
0.95 + 0.3 * Math.Min(1.0, numTotalHits / 2500.0) +
(numTotalHits > 2500 ? Math.Log10(numTotalHits / 2500.0) * 0.475 : 0.0);
value *= lengthBonus;
value *= Math.Pow(0.97, misses);
// Combo scaling
if (catchAttributes.MaxCombo > 0)
value *= Math.Min(Math.Pow(score.MaxCombo, 0.8) / Math.Pow(catchAttributes.MaxCombo, 0.8), 1.0);
double approachRate = catchAttributes.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 (score.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 (score.Mods.Any(m => m is ModFlashlight))
value *= 1.35 * lengthBonus;
value *= Math.Pow(accuracy(), 5.5);
if (score.Mods.Any(m => m is ModNoFail))
value *= 0.90;
return new CatchPerformanceAttributes
{
Total = 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;
}
}