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only nerf total cognition sum when reading > flashlight (#36599)

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Alternative to #36464 and #36487.

Reading and flashlight should be treated much more separately, since the
flashlight skill only accounts for object visibility and repetition, but
reading accounts for overlaps, high/low AR, etc. However, for certain
scores with very high reading (to the point of memorisation), the skill
indeed overlaps with flashlight.

This PR uses the normal strain sum exponent for reading and flashlight
(for player expectations), with an extra factor on flashlight to account
for the ease of adding flashlight to a partially memorised map when
reading is the dominant skill.
This commit is contained in:
molneya
2026-02-09 01:11:17 +08:00
committed by GitHub
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parent 4eec06c1c3
commit 0f709035cd
1 changed files with 2 additions and 5 deletions
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osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs
+2 -5
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@@ -146,11 +146,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
public static double SumCognitionDifficulty(double reading, double flashlight)
{
// Base LP summed value, accounting for map being partially memorized with FL
double cognition = DifficultyCalculationUtils.Norm(2, reading, flashlight);
// Inrease FL bonus when it's lower than reading to avoid situations where high reading difficulty makes FL give practically 0 bonus
return flashlight >= reading ? cognition : double.Lerp(reading + flashlight, cognition, flashlight / reading);
// Nerf flashlight value in cognition sum when reading is greater than flashlight
return DifficultyCalculationUtils.Norm(OsuPerformanceCalculator.PERFORMANCE_NORM_EXPONENT, reading, flashlight * Math.Clamp(flashlight / reading, 0.25, 1.0));
}
private double calculateStarRating(double basePerformance)