From a045f9e72f000c045a554963edf3d1b3932e1ee7 Mon Sep 17 00:00:00 2001
From: andy840119 <andy840119@gmail.com>
Date: Wed, 15 Jun 2022 22:37:05 +0800
Subject: [PATCH 1/2] Update the package to the latest.

---
 osu.Game.Rulesets.Karaoke/osu.Game.Rulesets.Karaoke.csproj | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/osu.Game.Rulesets.Karaoke/osu.Game.Rulesets.Karaoke.csproj b/osu.Game.Rulesets.Karaoke/osu.Game.Rulesets.Karaoke.csproj
index 157dccce8..07eb25d85 100644
--- a/osu.Game.Rulesets.Karaoke/osu.Game.Rulesets.Karaoke.csproj
+++ b/osu.Game.Rulesets.Karaoke/osu.Game.Rulesets.Karaoke.csproj
@@ -18,7 +18,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="ppy.osu.Game" Version="2022.612.0" />
+    <PackageReference Include="ppy.osu.Game" Version="2022.615.0" />
     <PackageReference Include="Lucene.Net" Version="4.8.0-beta00016" />
     <PackageReference Include="Lucene.Net.Analysis.Kuromoji" Version="4.8.0-beta00016" />
     <PackageReference Include="NicoKaraParser" Version="1.1.0" />

From 56300059e4fa32b9ce66669a57ef7831cbf4b170 Mon Sep 17 00:00:00 2001
From: andy840119 <andy840119@gmail.com>
Date: Wed, 15 Jun 2022 22:37:22 +0800
Subject: [PATCH 2/2] Fix the api change.

---
 .../Difficulty/KaraokeDifficultyCalculator.cs               | 6 +++++-
 .../Difficulty/Preprocessing/KaraokeDifficultyHitObject.cs  | 5 +++--
 osu.Game.Rulesets.Karaoke/Difficulty/Skills/Strain.cs       | 6 +++---
 3 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/osu.Game.Rulesets.Karaoke/Difficulty/KaraokeDifficultyCalculator.cs b/osu.Game.Rulesets.Karaoke/Difficulty/KaraokeDifficultyCalculator.cs
index 1eecb3d75..fb4fe9635 100644
--- a/osu.Game.Rulesets.Karaoke/Difficulty/KaraokeDifficultyCalculator.cs
+++ b/osu.Game.Rulesets.Karaoke/Difficulty/KaraokeDifficultyCalculator.cs
@@ -54,8 +54,12 @@ protected override IEnumerable<DifficultyHitObject> CreateDifficultyHitObjects(I
             // todo : might have a sort.
             // LegacySortHelper<HitObject>.Sort(sortedObjects, Comparer<HitObject>.Create((a, b) => (int)Math.Round(a.StartTime) - (int)Math.Round(b.StartTime)));
 
+            List<DifficultyHitObject> objects = new List<DifficultyHitObject>();
+
             for (int i = 1; i < sortedObjects.Length; i++)
-                yield return new KaraokeDifficultyHitObject(sortedObjects[i], sortedObjects[i - 1], clockRate);
+                objects.Add(new KaraokeDifficultyHitObject(sortedObjects[i], sortedObjects[i - 1], clockRate, objects, objects.Count));
+
+            return objects;
         }
 
         // Sorting is done in CreateDifficultyHitObjects, since the full list of hitobjects is required.
diff --git a/osu.Game.Rulesets.Karaoke/Difficulty/Preprocessing/KaraokeDifficultyHitObject.cs b/osu.Game.Rulesets.Karaoke/Difficulty/Preprocessing/KaraokeDifficultyHitObject.cs
index 02a2435db..b8b9e2806 100644
--- a/osu.Game.Rulesets.Karaoke/Difficulty/Preprocessing/KaraokeDifficultyHitObject.cs
+++ b/osu.Game.Rulesets.Karaoke/Difficulty/Preprocessing/KaraokeDifficultyHitObject.cs
@@ -1,6 +1,7 @@
 // Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the GPL Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System.Collections.Generic;
 using osu.Game.Rulesets.Difficulty.Preprocessing;
 using osu.Game.Rulesets.Karaoke.Objects;
 using osu.Game.Rulesets.Objects;
@@ -11,8 +12,8 @@ public class KaraokeDifficultyHitObject : DifficultyHitObject
     {
         public new Note BaseObject => (Note)base.BaseObject;
 
-        public KaraokeDifficultyHitObject(HitObject hitObject, HitObject lastObject, double clockRate)
-            : base(hitObject, lastObject, clockRate)
+        public KaraokeDifficultyHitObject(HitObject hitObject, HitObject lastObject, double clockRate, List<DifficultyHitObject> objects, int index)
+            : base(hitObject, lastObject, clockRate, objects, index)
         {
         }
     }
diff --git a/osu.Game.Rulesets.Karaoke/Difficulty/Skills/Strain.cs b/osu.Game.Rulesets.Karaoke/Difficulty/Skills/Strain.cs
index 3cae281ed..d57ff035c 100644
--- a/osu.Game.Rulesets.Karaoke/Difficulty/Skills/Strain.cs
+++ b/osu.Game.Rulesets.Karaoke/Difficulty/Skills/Strain.cs
@@ -75,9 +75,9 @@ protected override double StrainValueOf(DifficultyHitObject current)
             static int getColumnIndex(Tone tone) => 0;
         }
 
-        protected override double CalculateInitialStrain(double time)
-            => applyDecay(individualStrain, time - Previous[0].StartTime, individual_decay_base)
-               + applyDecay(overallStrain, time - Previous[0].StartTime, overall_decay_base);
+        protected override double CalculateInitialStrain(double offset, DifficultyHitObject current)
+            => applyDecay(individualStrain, offset - current.Previous(0).StartTime, individual_decay_base)
+               + applyDecay(overallStrain, offset - current.Previous(0).StartTime, overall_decay_base);
 
         private double applyDecay(double value, double deltaTime, double decayBase)
             => value * Math.Pow(decayBase, deltaTime / 1000);