From e4f25fc4d49bfd0d91f764c4b54a68c4671404d6 Mon Sep 17 00:00:00 2001
From: sw1tchbl4d3 <sw1tchbl4d3@sw1tchbl4d3.com>
Date: Wed, 26 Oct 2022 16:42:00 +0200
Subject: [PATCH] Don't overwrite special precision legacy difficulty points

---
 osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs b/osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs
index c9ee63424c..b1383c9e85 100644
--- a/osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs
+++ b/osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs
@@ -10,6 +10,7 @@ using System.IO;
 using System.Linq;
 using System.Text;
 using JetBrains.Annotations;
+using osu.Framework.Utils;
 using osu.Game.Audio;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Beatmaps.Legacy;
@@ -190,7 +191,14 @@ namespace osu.Game.Beatmaps.Formats
             extractSampleControlPoints(beatmap.HitObjects);
 
             foreach (var point in legacyControlPoints.EffectPoints)
+            {
+                DifficultyControlPoint difficultyPoint = legacyControlPoints.DifficultyPointAt(point.Time);
+
+                if (Precision.AlmostEquals(difficultyPoint.SliderVelocity, point.ScrollSpeed, acceptableDifference: point.ScrollSpeedBindable.Precision))
+                    continue;
+
                 legacyControlPoints.Add(point.Time, new DifficultyControlPoint { SliderVelocity = point.ScrollSpeed });
+            }
 
             foreach (var group in legacyControlPoints.Groups)
             {