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Merge pull request #14217 from MBmasher/fl-skill

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Add difficulty skill for Flashlight mod
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Dan Balasescu 2021-09-21 12:06:41 +09:00 committed by GitHub
commit a3e329f961
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 124 additions and 27 deletions
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1
osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyAttributes.cs
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@ -9,6 +9,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
{
public double AimStrain { get; set; }
public double SpeedStrain { get; set; }
public double FlashlightRating { get; set; }
public double ApproachRate { get; set; }
public double OverallDifficulty { get; set; }
public int HitCircleCount { get; set; }

5
osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs
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@ -34,6 +34,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
double aimRating = Math.Sqrt(skills[0].DifficultyValue()) * difficulty_multiplier;
double speedRating = Math.Sqrt(skills[1].DifficultyValue()) * difficulty_multiplier;
double flashlightRating = Math.Sqrt(skills[2].DifficultyValue()) * difficulty_multiplier;
double baseAimPerformance = Math.Pow(5 * Math.Max(1, aimRating / 0.0675) - 4, 3) / 100000;
double baseSpeedPerformance = Math.Pow(5 * Math.Max(1, speedRating / 0.0675) - 4, 3) / 100000;
@ -60,6 +61,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
Mods = mods,
AimStrain = aimRating,
SpeedStrain = speedRating,
FlashlightRating = flashlightRating,
ApproachRate = preempt > 1200 ? (1800 - preempt) / 120 : (1200 - preempt) / 150 + 5,
OverallDifficulty = (80 - hitWindowGreat) / 6,
MaxCombo = maxCombo,
@ -86,7 +88,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
protected override Skill[] CreateSkills(IBeatmap beatmap, Mod[] mods, double clockRate) => new Skill[]
{
new Aim(mods),
new Speed(mods)
new Speed(mods),
new Flashlight(mods)
};
protected override Mod[] DifficultyAdjustmentMods => new Mod[]

79
osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs
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@ -41,7 +41,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
countMiss = Score.Statistics.GetValueOrDefault(HitResult.Miss);
// Custom multipliers for NoFail and SpunOut.
double multiplier = 1.12; // This is being adjusted to keep the final pp value scaled around what it used to be when changing things
double multiplier = 1.12; // This is being adjusted to keep the final pp value scaled around what it used to be when changing things.
if (mods.Any(m => m is OsuModNoFail))
multiplier *= Math.Max(0.90, 1.0 - 0.02 * countMiss);
@ -52,11 +52,13 @@ namespace osu.Game.Rulesets.Osu.Difficulty
double aimValue = computeAimValue();
double speedValue = computeSpeedValue();
double accuracyValue = computeAccuracyValue();
double flashlightValue = computeFlashlightValue();
double totalValue =
Math.Pow(
Math.Pow(aimValue, 1.1) +
Math.Pow(speedValue, 1.1) +
Math.Pow(accuracyValue, 1.1), 1.0 / 1.1
Math.Pow(accuracyValue, 1.1) +
Math.Pow(flashlightValue, 1.1), 1.0 / 1.1
) * multiplier;
if (categoryRatings != null)
@ -64,6 +66,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
categoryRatings.Add("Aim", aimValue);
categoryRatings.Add("Speed", speedValue);
categoryRatings.Add("Accuracy", accuracyValue);
categoryRatings.Add("Flashlight", flashlightValue);
categoryRatings.Add("OD", Attributes.OverallDifficulty);
categoryRatings.Add("AR", Attributes.ApproachRate);
categoryRatings.Add("Max Combo", Attributes.MaxCombo);
@ -81,7 +84,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
double aimValue = Math.Pow(5.0 * Math.Max(1.0, rawAim / 0.0675) - 4.0, 3.0) / 100000.0;
// Longer maps are worth more
// Longer maps are worth more.
double lengthBonus = 0.95 + 0.4 * Math.Min(1.0, totalHits / 2000.0) +
(totalHits > 2000 ? Math.Log10(totalHits / 2000.0) * 0.5 : 0.0);
@ -91,7 +94,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
if (countMiss > 0)
aimValue *= 0.97 * Math.Pow(1 - Math.Pow((double)countMiss / totalHits, 0.775), countMiss);
// Combo scaling
// Combo scaling.
if (Attributes.MaxCombo > 0)
aimValue *= Math.Min(Math.Pow(scoreMaxCombo, 0.8) / Math.Pow(Attributes.MaxCombo, 0.8), 1.0);
@ -109,23 +112,11 @@ namespace osu.Game.Rulesets.Osu.Difficulty
if (mods.Any(h => h is OsuModHidden))
aimValue *= 1.0 + 0.04 * (12.0 - Attributes.ApproachRate);
double flashlightBonus = 1.0;
aimValue *= approachRateBonus;
if (mods.Any(h => h is OsuModFlashlight))
{
// Apply object-based bonus for flashlight.
flashlightBonus = 1.0 + 0.35 * Math.Min(1.0, totalHits / 200.0) +
(totalHits > 200
? 0.3 * Math.Min(1.0, (totalHits - 200) / 300.0) +
(totalHits > 500 ? (totalHits - 500) / 1200.0 : 0.0)
: 0.0);
}
aimValue *= Math.Max(flashlightBonus, approachRateBonus);
// Scale the aim value with accuracy _slightly_
// Scale the aim value with accuracy _slightly_.
aimValue *= 0.5 + accuracy / 2.0;
// It is important to also consider accuracy difficulty when doing that
// It is important to also consider accuracy difficulty when doing that.
aimValue *= 0.98 + Math.Pow(Attributes.OverallDifficulty, 2) / 2500;
return aimValue;
@ -135,7 +126,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
{
double speedValue = Math.Pow(5.0 * Math.Max(1.0, Attributes.SpeedStrain / 0.0675) - 4.0, 3.0) / 100000.0;
// Longer maps are worth more
// Longer maps are worth more.
double lengthBonus = 0.95 + 0.4 * Math.Min(1.0, totalHits / 2000.0) +
(totalHits > 2000 ? Math.Log10(totalHits / 2000.0) * 0.5 : 0.0);
speedValue *= lengthBonus;
@ -144,7 +135,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
if (countMiss > 0)
speedValue *= 0.97 * Math.Pow(1 - Math.Pow((double)countMiss / totalHits, 0.775), Math.Pow(countMiss, .875));
// Combo scaling
// Combo scaling.
if (Attributes.MaxCombo > 0)
speedValue *= Math.Min(Math.Pow(scoreMaxCombo, 0.8) / Math.Pow(Attributes.MaxCombo, 0.8), 1.0);
@ -159,7 +150,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
if (mods.Any(m => m is OsuModHidden))
speedValue *= 1.0 + 0.04 * (12.0 - Attributes.ApproachRate);
// Scale the speed value with accuracy and OD
// Scale the speed value with accuracy and OD.
speedValue *= (0.95 + Math.Pow(Attributes.OverallDifficulty, 2) / 750) * Math.Pow(accuracy, (14.5 - Math.Max(Attributes.OverallDifficulty, 8)) / 2);
// Scale the speed value with # of 50s to punish doubletapping.
speedValue *= Math.Pow(0.98, countMeh < totalHits / 500.0 ? 0 : countMeh - totalHits / 500.0);
@ -169,7 +160,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
private double computeAccuracyValue()
{
// This percentage only considers HitCircles of any value - in this part of the calculation we focus on hitting the timing hit window
// This percentage only considers HitCircles of any value - in this part of the calculation we focus on hitting the timing hit window.
double betterAccuracyPercentage;
int amountHitObjectsWithAccuracy = Attributes.HitCircleCount;
@ -178,15 +169,15 @@ namespace osu.Game.Rulesets.Osu.Difficulty
else
betterAccuracyPercentage = 0;
// It is possible to reach a negative accuracy with this formula. Cap it at zero - zero points
// It is possible to reach a negative accuracy with this formula. Cap it at zero - zero points.
if (betterAccuracyPercentage < 0)
betterAccuracyPercentage = 0;
// Lots of arbitrary values from testing.
// Considering to use derivation from perfect accuracy in a probabilistic manner - assume normal distribution
// Considering to use derivation from perfect accuracy in a probabilistic manner - assume normal distribution.
double accuracyValue = Math.Pow(1.52163, Attributes.OverallDifficulty) * Math.Pow(betterAccuracyPercentage, 24) * 2.83;
// Bonus for many hitcircles - it's harder to keep good accuracy up for longer
// Bonus for many hitcircles - it's harder to keep good accuracy up for longer.
accuracyValue *= Math.Min(1.15, Math.Pow(amountHitObjectsWithAccuracy / 1000.0, 0.3));
if (mods.Any(m => m is OsuModHidden))
@ -197,6 +188,42 @@ namespace osu.Game.Rulesets.Osu.Difficulty
return accuracyValue;
}
private double computeFlashlightValue()
{
if (!mods.Any(h => h is OsuModFlashlight))
return 0.0;
double rawFlashlight = Attributes.FlashlightRating;
if (mods.Any(m => m is OsuModTouchDevice))
rawFlashlight = Math.Pow(rawFlashlight, 0.8);
double flashlightValue = Math.Pow(rawFlashlight, 2.0) * 25.0;
// Add an additional bonus for HDFL.
if (mods.Any(h => h is OsuModHidden))
flashlightValue *= 1.3;
// Penalize misses by assessing # of misses relative to the total # of objects. Default a 3% reduction for any # of misses.
if (countMiss > 0)
flashlightValue *= 0.97 * Math.Pow(1 - Math.Pow((double)countMiss / totalHits, 0.775), Math.Pow(countMiss, .875));
// Combo scaling.
if (Attributes.MaxCombo > 0)
flashlightValue *= Math.Min(Math.Pow(scoreMaxCombo, 0.8) / Math.Pow(Attributes.MaxCombo, 0.8), 1.0);
// Account for shorter maps having a higher ratio of 0 combo/100 combo flashlight radius.
flashlightValue *= 0.7 + 0.1 * Math.Min(1.0, totalHits / 200.0) +
(totalHits > 200 ? 0.2 * Math.Min(1.0, (totalHits - 200) / 200.0) : 0.0);
// Scale the flashlight value with accuracy _slightly_.
flashlightValue *= 0.5 + accuracy / 2.0;
// It is important to also consider accuracy difficulty when doing that.
flashlightValue *= 0.98 + Math.Pow(Attributes.OverallDifficulty, 2) / 2500;
return flashlightValue;
}
private int totalHits => countGreat + countOk + countMeh + countMiss;
private int totalSuccessfulHits => countGreat + countOk + countMeh;
}

66
osu.Game.Rulesets.Osu/Difficulty/Skills/Flashlight.cs Normal file
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@ -0,0 +1,66 @@
// 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 osu.Game.Rulesets.Difficulty.Preprocessing;
using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Osu.Difficulty.Preprocessing;
using osu.Game.Rulesets.Osu.Objects;
namespace osu.Game.Rulesets.Osu.Difficulty.Skills
{
/// <summary>
/// Represents the skill required to memorise and hit every object in a map with the Flashlight mod enabled.
/// </summary>
public class Flashlight : OsuStrainSkill
{
public Flashlight(Mod[] mods)
: base(mods)
{
}
protected override double SkillMultiplier => 0.15;
protected override double StrainDecayBase => 0.15;
protected override double DecayWeight => 1.0;
protected override int HistoryLength => 10; // Look back for 10 notes is added for the sake of flashlight calculations.
protected override double StrainValueOf(DifficultyHitObject current)
{
if (current.BaseObject is Spinner)
return 0;
var osuCurrent = (OsuDifficultyHitObject)current;
var osuHitObject = (OsuHitObject)(osuCurrent.BaseObject);
double scalingFactor = 52.0 / osuHitObject.Radius;
double smallDistNerf = 1.0;
double cumulativeStrainTime = 0.0;
double result = 0.0;
for (int i = 0; i < Previous.Count; i++)
{
var osuPrevious = (OsuDifficultyHitObject)Previous[i];
var osuPreviousHitObject = (OsuHitObject)(osuPrevious.BaseObject);
if (!(osuPrevious.BaseObject is Spinner))
{
double jumpDistance = (osuHitObject.StackedPosition - osuPreviousHitObject.EndPosition).Length;
cumulativeStrainTime += osuPrevious.StrainTime;
// We want to nerf objects that can be easily seen within the Flashlight circle radius.
if (i == 0)
smallDistNerf = Math.Min(1.0, jumpDistance / 75.0);
// We also want to nerf stacks so that only the first object of the stack is accounted for.
double stackNerf = Math.Min(1.0, (osuPrevious.JumpDistance / scalingFactor) / 25.0);
result += Math.Pow(0.8, i) * stackNerf * scalingFactor * jumpDistance / cumulativeStrainTime;
}
}
return Math.Pow(smallDistNerf * result, 2.0);
}
}
}