From 5a801e224fecbdbb996bf6c823fed825d87b75eb Mon Sep 17 00:00:00 2001
From: Givy120 <89256026+Givikap120@users.noreply.github.com>
Date: Wed, 6 May 2026 10:12:36 +0300
Subject: [PATCH] Add distance factor to anti-doubletap (#37636)

Circles that are spaced from each other can't be doubletapped, therefore
they were excluded from the low OD penalty in speed.

Co-authored-by: StanR <8269193+stanriders@users.noreply.github.com>
---
 .../Difficulty/Preprocessing/OsuDifficultyHitObject.cs      | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/osu.Game.Rulesets.Osu/Difficulty/Preprocessing/OsuDifficultyHitObject.cs b/osu.Game.Rulesets.Osu/Difficulty/Preprocessing/OsuDifficultyHitObject.cs
index 221b2c6378..413588749a 100644
--- a/osu.Game.Rulesets.Osu/Difficulty/Preprocessing/OsuDifficultyHitObject.cs
+++ b/osu.Game.Rulesets.Osu/Difficulty/Preprocessing/OsuDifficultyHitObject.cs
@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using osu.Game.Rulesets.Difficulty.Preprocessing;
+using osu.Game.Rulesets.Difficulty.Utils;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Rulesets.Osu.Objects;
@@ -194,7 +195,10 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
                 double speedRatio = currDeltaTime / Math.Max(currDeltaTime, deltaDifference);
                 double windowRatio = Math.Pow(Math.Min(1, currDeltaTime / HitWindow(HitResult.Great)), 5);
 
-                return 1.0 - Math.Pow(speedRatio, 1 - windowRatio);
+                // Can't doubletap if circles don't intersect
+                double distanceFactor = Math.Pow(DifficultyCalculationUtils.ReverseLerp(LazyJumpDistance, NORMALISED_DIAMETER, NORMALISED_RADIUS), 2);
+
+                return 1.0 - Math.Pow(speedRatio, distanceFactor * (1 - windowRatio));
             }
 
             return 0;