Merge branch 'master' into cognition

.github/workflows/ci.yml

@@ -133,7 +133,7 @@ jobs:
           dotnet-version: "8.0.x"
 
       - name: Install .NET Workloads
-        run: dotnet workload install maui-ios
+        run: dotnet workload install ios --from-rollback-file https://raw.githubusercontent.com/ppy/osu-framework/refs/heads/master/workloads.json
 
       - name: Build
         run: dotnet build -c Debug osu.iOS

.github/workflows/diffcalc.yml

@@ -104,6 +104,25 @@ env:
   EXECUTION_ID: execution-${{ github.run_id }}-${{ github.run_number }}-${{ github.run_attempt }}
 
 jobs:
+  master-environment:
+    name: Save master environment
+    runs-on: ubuntu-latest
+    outputs:
+      HEAD: ${{ steps.get-head.outputs.HEAD }}
+    steps:
+      - name: Checkout osu
+        uses: actions/checkout@v4
+        with:
+          ref: master
+          sparse-checkout: |
+            README.md
+
+      - name: Get HEAD ref
+        id: get-head
+        run: |
+          ref=$(git log -1 --format='%H')
+          echo "HEAD=https://github.com/${{ github.repository }}/commit/${ref}" >> "${GITHUB_OUTPUT}"
+
   check-permissions:
     name: Check permissions
     runs-on: ubuntu-latest
@@ -121,7 +140,7 @@ jobs:
 
   create-comment:
     name: Create PR comment
-    needs: check-permissions
+    needs: [ master-environment, check-permissions ]
     runs-on: ubuntu-latest
     if: ${{ github.event_name == 'issue_comment' && github.event.issue.pull_request }}
     steps:
@@ -158,7 +177,7 @@ jobs:
 
   environment:
     name: Setup environment
-    needs: directory
+    needs: [ master-environment, directory ]
     runs-on: self-hosted
     env:
       VARS_JSON: ${{ toJSON(vars) }}
@@ -182,6 +201,10 @@ jobs:
               fi
           done
 
+      - name: Add master environment
+        run: |
+          sed -i "s;^OSU_A=.*$;OSU_A=${{ needs.master-environment.outputs.HEAD }};" "${{ needs.directory.outputs.GENERATOR_ENV }}"
+
       - name: Add pull-request environment
         if: ${{ github.event_name == 'issue_comment' && github.event.issue.pull_request }}
         run: |
@@ -361,8 +384,7 @@ jobs:
         uses: thollander/actions-comment-pull-request@fabd468d3a1a0b97feee5f6b9e499eab0dd903f6 # v2.5.0
         with:
           comment_tag: ${{ env.EXECUTION_ID }}
-          mode: upsert
+          mode: recreate
-          create_if_not_exists: false
           message: |
             Target: ${{ needs.generator.outputs.TARGET }}
             Spreadsheet: ${{ needs.generator.outputs.SPREADSHEET_LINK }}
@@ -372,8 +394,7 @@ jobs:
         uses: thollander/actions-comment-pull-request@fabd468d3a1a0b97feee5f6b9e499eab0dd903f6 # v2.5.0
         with:
           comment_tag: ${{ env.EXECUTION_ID }}
-          mode: upsert
+          mode: recreate
-          create_if_not_exists: false
           message: |
             Difficulty calculation failed: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
 

osu.Android.props

@@ -10,7 +10,7 @@
     <EmbedAssembliesIntoApk>true</EmbedAssembliesIntoApk>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2024.912.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2024.1007.0" />
   </ItemGroup>
   <PropertyGroup>
     <!-- Fody does not handle Android build well, and warns when unchanged.

osu.Desktop/Updater/VelopackUpdateManager.cs

@@ -66,7 +66,7 @@ namespace osu.Desktop.Updater
                     {
                         Activated = () =>
                         {
-                            restartToApplyUpdate();
+                            Task.Run(restartToApplyUpdate);
                             return true;
                         }
                     });
@@ -88,7 +88,11 @@ namespace osu.Desktop.Updater
                 {
                     notification = new UpdateProgressNotification
                     {
-                        CompletionClickAction = restartToApplyUpdate,
+                        CompletionClickAction = () =>
+                        {
+                            Task.Run(restartToApplyUpdate);
+                            return true;
+                        },
                     };
 
                     Schedule(() => notificationOverlay.Post(notification));
@@ -127,13 +131,10 @@ namespace osu.Desktop.Updater
             return true;
         }
 
-        private bool restartToApplyUpdate()
+        private async Task restartToApplyUpdate()
         {
-            // TODO: Migrate this to async flow whenever available (see https://github.com/ppy/osu/pull/28743#discussion_r1740505665).
+            await updateManager.WaitExitThenApplyUpdatesAsync(pendingUpdate?.TargetFullRelease).ConfigureAwait(false);
-            // Currently there's an internal Thread.Sleep(300) which will cause a stutter when the user clicks to restart.
-            updateManager.WaitExitThenApplyUpdates(pendingUpdate?.TargetFullRelease);
             Schedule(() => game.AttemptExit());
-            return true;
         }
     }
 }

osu.Desktop/osu.Desktop.csproj

@@ -26,7 +26,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="System.IO.Packaging" Version="8.0.0" />
     <PackageReference Include="DiscordRichPresence" Version="1.2.1.24" />
-    <PackageReference Include="Velopack" Version="0.0.598-g933b2ab" />
+    <PackageReference Include="Velopack" Version="0.0.630-g9c52e40" />
   </ItemGroup>
   <ItemGroup Label="Resources">
     <EmbeddedResource Include="lazer.ico" />

osu.Game.Benchmarks/BenchmarkGeometryUtils.cs

@@ -0,0 +1,29 @@
+// 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 BenchmarkDotNet.Attributes;
+using osu.Framework.Utils;
+using osu.Game.Utils;
+using osuTK;
+
+namespace osu.Game.Benchmarks
+{
+    public class BenchmarkGeometryUtils : BenchmarkTest
+    {
+        [Params(100, 1000, 2000, 4000, 8000, 10000)]
+        public int N;
+
+        private Vector2[] points = null!;
+
+        public override void SetUp()
+        {
+            points = new Vector2[N];
+
+            for (int i = 0; i < points.Length; ++i)
+                points[i] = new Vector2(RNG.Next(512), RNG.Next(384));
+        }
+
+        [Benchmark]
+        public void MinimumEnclosingCircle() => GeometryUtils.MinimumEnclosingCircle(points);
+    }
+}

osu.Game.Rulesets.Catch.Tests/Editor/CatchPlacementBlueprintTestScene.cs

@@ -71,7 +71,7 @@ namespace osu.Game.Rulesets.Catch.Tests.Editor
             contentContainer.Playfield.HitObjectContainer.Add(hitObject);
         }
 
-        protected override SnapResult SnapForBlueprint(PlacementBlueprint blueprint)
+        protected override SnapResult SnapForBlueprint(HitObjectPlacementBlueprint blueprint)
         {
             var result = base.SnapForBlueprint(blueprint);
             result.Time = Math.Round(HitObjectContainer.TimeAtScreenSpacePosition(result.ScreenSpacePosition) / TIME_SNAP) * TIME_SNAP;

osu.Game.Rulesets.Catch.Tests/Editor/TestSceneBananaShowerPlacementBlueprint.cs

@@ -22,7 +22,7 @@ namespace osu.Game.Rulesets.Catch.Tests.Editor
     {
         protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableBananaShower((BananaShower)hitObject);
 
-        protected override PlacementBlueprint CreateBlueprint() => new BananaShowerPlacementBlueprint();
+        protected override HitObjectPlacementBlueprint CreateBlueprint() => new BananaShowerPlacementBlueprint();
 
         protected override void AddHitObject(DrawableHitObject hitObject)
         {

osu.Game.Rulesets.Catch.Tests/Editor/TestSceneFruitPlacementBlueprint.cs

@@ -19,7 +19,7 @@ namespace osu.Game.Rulesets.Catch.Tests.Editor
     {
         protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableFruit((Fruit)hitObject);
 
-        protected override PlacementBlueprint CreateBlueprint() => new FruitPlacementBlueprint();
+        protected override HitObjectPlacementBlueprint CreateBlueprint() => new FruitPlacementBlueprint();
 
         [Test]
         public void TestFruitPlacementPosition()

osu.Game.Rulesets.Catch.Tests/Editor/TestSceneJuiceStreamPlacementBlueprint.cs

@@ -114,7 +114,7 @@ namespace osu.Game.Rulesets.Catch.Tests.Editor
 
         protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableJuiceStream((JuiceStream)hitObject);
 
-        protected override PlacementBlueprint CreateBlueprint() => new JuiceStreamPlacementBlueprint();
+        protected override HitObjectPlacementBlueprint CreateBlueprint() => new JuiceStreamPlacementBlueprint();
 
         private void addMoveAndClickSteps(double time, float position, bool end = false)
         {

osu.Game.Rulesets.Catch/CatchRuleset.cs

@@ -4,6 +4,7 @@
 using System;
 using System.Collections.Generic;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Input.Bindings;
 using osu.Framework.Localisation;
@@ -31,6 +32,7 @@ using osu.Game.Scoring;
 using osu.Game.Screens.Edit.Setup;
 using osu.Game.Screens.Ranking.Statistics;
 using osu.Game.Skinning;
+using osuTK;
 
 namespace osu.Game.Rulesets.Catch
 {
@@ -223,10 +225,28 @@ namespace osu.Game.Rulesets.Catch
 
         public override HitObjectComposer CreateHitObjectComposer() => new CatchHitObjectComposer(this);
 
-        public override IEnumerable<SetupSection> CreateEditorSetupSections() =>
+        public override IEnumerable<Drawable> CreateEditorSetupSections() =>
         [
+            new MetadataSection(),
             new DifficultySection(),
-            new ColoursSection(),
+            new FillFlowContainer
+            {
+                AutoSizeAxes = Axes.Y,
+                Direction = FillDirection.Vertical,
+                Spacing = new Vector2(SetupScreen.SPACING),
+                Children = new Drawable[]
+                {
+                    new ResourcesSection
+                    {
+                        RelativeSizeAxes = Axes.X,
+                    },
+                    new ColoursSection
+                    {
+                        RelativeSizeAxes = Axes.X,
+                    }
+                }
+            },
+            new DesignSection(),
         ];
 
         public override IBeatmapVerifier CreateBeatmapVerifier() => new CatchBeatmapVerifier();

osu.Game.Rulesets.Catch/Difficulty/CatchDifficultyCalculator.cs

@@ -3,7 +3,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Beatmaps;
 using osu.Game.Rulesets.Catch.Difficulty.Preprocessing;
@@ -44,7 +43,7 @@ namespace osu.Game.Rulesets.Catch.Difficulty
                 StarRating = Math.Sqrt(skills[0].DifficultyValue()) * difficulty_multiplier,
                 Mods = mods,
                 ApproachRate = preempt > 1200.0 ? -(preempt - 1800.0) / 120.0 : -(preempt - 1200.0) / 150.0 + 5.0,
-                MaxCombo = beatmap.HitObjects.Count(h => h is Fruit) + beatmap.HitObjects.OfType<JuiceStream>().SelectMany(j => j.NestedHitObjects).Count(h => !(h is TinyDroplet)),
+                MaxCombo = beatmap.GetMaxCombo(),
             };
 
             return attributes;

osu.Game.Rulesets.Catch/Edit/BananaShowerCompositionTool.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Edit.Tools;
 
 namespace osu.Game.Rulesets.Catch.Edit
 {
-    public class BananaShowerCompositionTool : HitObjectCompositionTool
+    public class BananaShowerCompositionTool : CompositionTool
     {
         public BananaShowerCompositionTool()
             : base(nameof(BananaShower))
@@ -19,6 +19,6 @@ namespace osu.Game.Rulesets.Catch.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Spinners);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new BananaShowerPlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new BananaShowerPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Catch/Edit/Blueprints/CatchPlacementBlueprint.cs

@@ -9,7 +9,7 @@ using osu.Game.Rulesets.UI.Scrolling;
 
 namespace osu.Game.Rulesets.Catch.Edit.Blueprints
 {
-    public partial class CatchPlacementBlueprint<THitObject> : PlacementBlueprint
+    public partial class CatchPlacementBlueprint<THitObject> : HitObjectPlacementBlueprint
         where THitObject : CatchHitObject, new()
     {
         protected new THitObject HitObject => (THitObject)base.HitObject;

osu.Game.Rulesets.Catch/Edit/Blueprints/JuiceStreamSelectionBlueprint.cs

@@ -8,6 +8,7 @@ using osu.Framework.Caching;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Primitives;
 using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Input.Bindings;
 using osu.Framework.Input.Events;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Rulesets.Catch.Edit.Blueprints.Components;
@@ -172,7 +173,10 @@ namespace osu.Game.Rulesets.Catch.Edit.Blueprints
             yield return new OsuMenuItem("Add vertex", MenuItemType.Standard, () =>
             {
                 editablePath.AddVertex(rightMouseDownPosition);
-            });
+            })
+            {
+                Hotkey = new Hotkey(new KeyCombination(InputKey.Control, InputKey.MouseLeft))
+            };
         }
 
         protected override void Dispose(bool isDisposing)

osu.Game.Rulesets.Catch/Edit/CatchHitObjectComposer.cs

@@ -84,7 +84,7 @@ namespace osu.Game.Rulesets.Catch.Edit
 
         protected override BeatSnapGrid CreateBeatSnapGrid() => new CatchBeatSnapGrid();
 
-        protected override IReadOnlyList<HitObjectCompositionTool> CompositionTools => new HitObjectCompositionTool[]
+        protected override IReadOnlyList<CompositionTool> CompositionTools => new CompositionTool[]
         {
             new FruitCompositionTool(),
             new JuiceStreamCompositionTool(),
@@ -114,6 +114,26 @@ namespace osu.Game.Rulesets.Catch.Edit
         {
         }
 
+        protected override bool OnKeyDown(KeyDownEvent e)
+        {
+            if (e.Repeat)
+                return false;
+
+            handleToggleViaKey(e);
+            return base.OnKeyDown(e);
+        }
+
+        protected override void OnKeyUp(KeyUpEvent e)
+        {
+            handleToggleViaKey(e);
+            base.OnKeyUp(e);
+        }
+
+        private void handleToggleViaKey(KeyboardEvent key)
+        {
+            DistanceSnapProvider.HandleToggleViaKey(key);
+        }
+
         public override SnapResult FindSnappedPositionAndTime(Vector2 screenSpacePosition, SnapType snapType = SnapType.All)
         {
             var result = base.FindSnappedPositionAndTime(screenSpacePosition, snapType);

osu.Game.Rulesets.Catch/Edit/FruitCompositionTool.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Edit.Tools;
 
 namespace osu.Game.Rulesets.Catch.Edit
 {
-    public class FruitCompositionTool : HitObjectCompositionTool
+    public class FruitCompositionTool : CompositionTool
     {
         public FruitCompositionTool()
             : base(nameof(Fruit))
@@ -19,6 +19,6 @@ namespace osu.Game.Rulesets.Catch.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new FruitPlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new FruitPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Catch/Edit/JuiceStreamCompositionTool.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Edit.Tools;
 
 namespace osu.Game.Rulesets.Catch.Edit
 {
-    public class JuiceStreamCompositionTool : HitObjectCompositionTool
+    public class JuiceStreamCompositionTool : CompositionTool
     {
         public JuiceStreamCompositionTool()
             : base(nameof(JuiceStream))
@@ -19,6 +19,6 @@ namespace osu.Game.Rulesets.Catch.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new JuiceStreamPlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new JuiceStreamPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Catch/Objects/Drawables/DrawableBanana.cs

@@ -1,10 +1,12 @@
 // 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.Framework.Allocation;
-using osu.Framework.Graphics;
+using osu.Framework.Utils;
 using osu.Game.Rulesets.Catch.Skinning.Default;
 using osu.Game.Skinning;
+using osuTK;
 
 namespace osu.Game.Rulesets.Catch.Objects.Drawables
 {
@@ -36,23 +38,43 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawables
             StartTimeBindable.BindValueChanged(_ => UpdateComboColour());
         }
 
+        private float startScale;
+        private float endScale;
+
+        private float startAngle;
+        private float endAngle;
+
         protected override void UpdateInitialTransforms()
         {
             base.UpdateInitialTransforms();
 
+            // Important to have this in UpdateInitialTransforms() to it is re-triggered by RefreshStateTransforms().
             const float end_scale = 0.6f;
             const float random_scale_range = 1.6f;
 
-            ScalingContainer.ScaleTo(HitObject.Scale * (end_scale + random_scale_range * RandomSingle(3)))
+            startScale = end_scale + random_scale_range * RandomSingle(3);
-                            .Then().ScaleTo(HitObject.Scale * end_scale, HitObject.TimePreempt);
+            endScale = end_scale;
 
-            ScalingContainer.RotateTo(getRandomAngle(1))
+            startAngle = getRandomAngle(1);
-                            .Then()
+            endAngle = getRandomAngle(2);
-                            .RotateTo(getRandomAngle(2), HitObject.TimePreempt);
 
             float getRandomAngle(int series) => 180 * (RandomSingle(series) * 2 - 1);
         }
 
+        protected override void Update()
+        {
+            base.Update();
+
+            double preemptProgress = (Time.Current - (HitObject.StartTime - InitialLifetimeOffset)) / HitObject.TimePreempt;
+
+            // Clamp scale and rotation at the point of bananas being caught, else let them freely extrapolate.
+            if (Result.IsHit)
+                preemptProgress = Math.Min(1, preemptProgress);
+
+            ScalingContainer.Scale = new Vector2(HitObject.Scale * (float)Interpolation.Lerp(startScale, endScale, preemptProgress));
+            ScalingContainer.Rotation = (float)Interpolation.Lerp(startAngle, endAngle, preemptProgress);
+        }
+
         public override void PlaySamples()
         {
             base.PlaySamples();

osu.Game.Rulesets.Catch/Objects/Drawables/DrawableDroplet.cs

@@ -2,7 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Allocation;
-using osu.Framework.Graphics;
+using osu.Framework.Utils;
 using osu.Game.Rulesets.Catch.Skinning.Default;
 using osu.Game.Skinning;
 
@@ -28,15 +28,24 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawables
                 _ => new DropletPiece());
         }
 
+        private float startRotation;
+
         protected override void UpdateInitialTransforms()
         {
             base.UpdateInitialTransforms();
 
-            // roughly matches osu-stable
+            // Important to have this in UpdateInitialTransforms() to it is re-triggered by RefreshStateTransforms().
-            float startRotation = RandomSingle(1) * 20;
+            startRotation = RandomSingle(1) * 20;
-            double duration = HitObject.TimePreempt + 2000;
+        }
 
-            ScalingContainer.RotateTo(startRotation).RotateTo(startRotation + 720, duration);
+        protected override void Update()
+        {
+            base.Update();
+
+            // No clamping for droplets. They should be considered indefinitely spinning regardless of time.
+            // They also never end up on the plate, so they shouldn't stop spinning when caught.
+            double preemptProgress = (Time.Current - (HitObject.StartTime - InitialLifetimeOffset)) / (HitObject.TimePreempt + 2000);
+            ScalingContainer.Rotation = (float)Interpolation.Lerp(startRotation, startRotation + 720, preemptProgress);
         }
     }
 }

osu.Game.Rulesets.Catch/Objects/Drawables/DrawableFruit.cs

@@ -2,7 +2,6 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Allocation;
-using osu.Framework.Graphics;
 using osu.Game.Rulesets.Catch.Skinning.Default;
 using osu.Game.Skinning;
 
@@ -32,7 +31,8 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawables
         {
             base.UpdateInitialTransforms();
 
-            ScalingContainer.RotateTo((RandomSingle(1) - 0.5f) * 40);
+            // Important to have this in UpdateInitialTransforms() to it is re-triggered by RefreshStateTransforms().
+            ScalingContainer.Rotation = (RandomSingle(1) - 0.5f) * 40;
         }
     }
 }

osu.Game.Rulesets.Mania.Tests/Editor/ManiaPlacementBlueprintTestScene.cs

@@ -47,7 +47,7 @@ namespace osu.Game.Rulesets.Mania.Tests.Editor
             });
         }
 
-        protected override SnapResult SnapForBlueprint(PlacementBlueprint blueprint)
+        protected override SnapResult SnapForBlueprint(HitObjectPlacementBlueprint blueprint)
         {
             double time = column.TimeAtScreenSpacePosition(InputManager.CurrentState.Mouse.Position);
             var pos = column.ScreenSpacePositionAtTime(time);

osu.Game.Rulesets.Mania.Tests/Editor/TestSceneHoldNotePlacementBlueprint.cs

@@ -13,6 +13,6 @@ namespace osu.Game.Rulesets.Mania.Tests.Editor
     public partial class TestSceneHoldNotePlacementBlueprint : ManiaPlacementBlueprintTestScene
     {
         protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableHoldNote((HoldNote)hitObject);
-        protected override PlacementBlueprint CreateBlueprint() => new HoldNotePlacementBlueprint();
+        protected override HitObjectPlacementBlueprint CreateBlueprint() => new HoldNotePlacementBlueprint();
     }
 }

osu.Game.Rulesets.Mania.Tests/Editor/TestSceneManiaEditorSaving.cs

@@ -20,10 +20,10 @@ namespace osu.Game.Rulesets.Mania.Tests.Editor
         [Test]
         public void TestKeyCountChange()
         {
-            LabelledSliderBar<float> keyCount = null!;
+            FormSliderBar<float> keyCount = null!;
 
             AddStep("go to setup screen", () => InputManager.Key(Key.F4));
-            AddUntilStep("retrieve key count slider", () => keyCount = Editor.ChildrenOfType<SetupScreen>().Single().ChildrenOfType<LabelledSliderBar<float>>().First(), () => Is.Not.Null);
+            AddUntilStep("retrieve key count slider", () => keyCount = Editor.ChildrenOfType<SetupScreen>().Single().ChildrenOfType<FormSliderBar<float>>().First(), () => Is.Not.Null);
             AddAssert("key count is 5", () => keyCount.Current.Value, () => Is.EqualTo(5));
             AddStep("change key count to 8", () =>
             {

osu.Game.Rulesets.Mania.Tests/Editor/TestSceneManiaSelectionHandler.cs

@@ -6,6 +6,7 @@ using NUnit.Framework;
 using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.UI;
 using osu.Game.Screens.Edit.Compose.Components;
 using osu.Game.Tests.Beatmaps;
 using osu.Game.Tests.Visual;
@@ -92,5 +93,30 @@ namespace osu.Game.Rulesets.Mania.Tests.Editor
             AddAssert("second object flipped", () => second.StartTime, () => Is.EqualTo(250));
             AddAssert("third object flipped", () => third.StartTime, () => Is.EqualTo(1250));
         }
+
+        [Test]
+        public void TestOffScreenObjectsRemainSelectedOnColumnChange()
+        {
+            AddStep("create objects", () =>
+            {
+                for (int i = 0; i < 20; ++i)
+                    EditorBeatmap.Add(new Note { StartTime = 1000 * i, Column = 0 });
+            });
+
+            AddStep("select everything", () => EditorBeatmap.SelectedHitObjects.AddRange(EditorBeatmap.HitObjects));
+            AddStep("start drag", () =>
+            {
+                InputManager.MoveMouseTo(this.ChildrenOfType<Column>().First());
+                InputManager.PressButton(MouseButton.Left);
+            });
+            AddStep("end drag", () =>
+            {
+                InputManager.MoveMouseTo(this.ChildrenOfType<Column>().Last());
+                InputManager.ReleaseButton(MouseButton.Left);
+            });
+
+            AddAssert("all objects in last column", () => EditorBeatmap.HitObjects.All(ho => ((ManiaHitObject)ho).Column == 3));
+            AddAssert("all objects remain selected", () => EditorBeatmap.SelectedHitObjects.SequenceEqual(EditorBeatmap.HitObjects));
+        }
     }
 }

osu.Game.Rulesets.Mania.Tests/Editor/TestSceneNotePlacementBlueprint.cs

@@ -64,6 +64,6 @@ namespace osu.Game.Rulesets.Mania.Tests.Editor
         private Note getNote() => this.ChildrenOfType<DrawableNote>().FirstOrDefault()?.HitObject;
 
         protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableNote((Note)hitObject);
-        protected override PlacementBlueprint CreateBlueprint() => new NotePlacementBlueprint();
+        protected override HitObjectPlacementBlueprint CreateBlueprint() => new NotePlacementBlueprint();
     }
 }

osu.Game.Rulesets.Mania/Edit/Blueprints/ManiaPlacementBlueprint.cs

@@ -15,7 +15,7 @@ using osuTK.Input;
 
 namespace osu.Game.Rulesets.Mania.Edit.Blueprints
 {
-    public abstract partial class ManiaPlacementBlueprint<T> : PlacementBlueprint
+    public abstract partial class ManiaPlacementBlueprint<T> : HitObjectPlacementBlueprint
         where T : ManiaHitObject
     {
         protected new T HitObject => (T)base.HitObject;

osu.Game.Rulesets.Mania/Edit/HoldNoteCompositionTool.cs

@@ -9,7 +9,7 @@ using osu.Game.Rulesets.Mania.Edit.Blueprints;
 
 namespace osu.Game.Rulesets.Mania.Edit
 {
-    public class HoldNoteCompositionTool : HitObjectCompositionTool
+    public class HoldNoteCompositionTool : CompositionTool
     {
         public HoldNoteCompositionTool()
             : base("Hold")
@@ -18,6 +18,6 @@ namespace osu.Game.Rulesets.Mania.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new HoldNotePlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new HoldNotePlacementBlueprint();
     }
 }

osu.Game.Rulesets.Mania/Edit/ManiaHitObjectComposer.cs

@@ -46,7 +46,7 @@ namespace osu.Game.Rulesets.Mania.Edit
 
         protected override BeatSnapGrid CreateBeatSnapGrid() => new ManiaBeatSnapGrid();
 
-        protected override IReadOnlyList<HitObjectCompositionTool> CompositionTools => new HitObjectCompositionTool[]
+        protected override IReadOnlyList<CompositionTool> CompositionTools => new CompositionTool[]
         {
             new NoteCompositionTool(),
             new HoldNoteCompositionTool()

osu.Game.Rulesets.Mania/Edit/ManiaSelectionHandler.cs

@@ -104,8 +104,10 @@ namespace osu.Game.Rulesets.Mania.Edit
             int minColumn = int.MaxValue;
             int maxColumn = int.MinValue;
 
+            var selectedObjects = EditorBeatmap.SelectedHitObjects.OfType<ManiaHitObject>().ToArray();
+
             // find min/max in an initial pass before actually performing the movement.
-            foreach (var obj in EditorBeatmap.SelectedHitObjects.OfType<ManiaHitObject>())
+            foreach (var obj in selectedObjects)
             {
                 if (obj.Column < minColumn)
                     minColumn = obj.Column;
@@ -121,6 +123,13 @@ namespace osu.Game.Rulesets.Mania.Edit
                 ((ManiaHitObject)h).Column += columnDelta;
                 maniaPlayfield.Add(h);
             });
+
+            // `HitObjectUsageEventBuffer`'s usage transferal flows and the playfield's `SetKeepAlive()` functionality do not combine well with this operation's usage pattern,
+            // leading to selections being sometimes partially dropped if some of the objects being moved are off screen
+            // (check blame for detailed explanation).
+            // thus, ensure that selection is preserved manually.
+            EditorBeatmap.SelectedHitObjects.Clear();
+            EditorBeatmap.SelectedHitObjects.AddRange(selectedObjects);
         }
     }
 }

osu.Game.Rulesets.Mania/Edit/NoteCompositionTool.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Mania.Objects;
 
 namespace osu.Game.Rulesets.Mania.Edit
 {
-    public class NoteCompositionTool : HitObjectCompositionTool
+    public class NoteCompositionTool : CompositionTool
     {
         public NoteCompositionTool()
             : base(nameof(Note))
@@ -19,6 +19,6 @@ namespace osu.Game.Rulesets.Mania.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new NotePlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new NotePlacementBlueprint();
     }
 }

osu.Game.Rulesets.Mania/Edit/Setup/ManiaDifficultySection.cs

@@ -19,12 +19,12 @@ namespace osu.Game.Rulesets.Mania.Edit.Setup
     {
         public override LocalisableString Title => EditorSetupStrings.DifficultyHeader;
 
-        private LabelledSliderBar<float> keyCountSlider { get; set; } = null!;
+        private FormSliderBar<float> keyCountSlider { get; set; } = null!;
-        private LabelledSwitchButton specialStyle { get; set; } = null!;
+        private FormCheckBox specialStyle { get; set; } = null!;
-        private LabelledSliderBar<float> healthDrainSlider { get; set; } = null!;
+        private FormSliderBar<float> healthDrainSlider { get; set; } = null!;
-        private LabelledSliderBar<float> overallDifficultySlider { get; set; } = null!;
+        private FormSliderBar<float> overallDifficultySlider { get; set; } = null!;
-        private LabelledSliderBar<double> baseVelocitySlider { get; set; } = null!;
+        private FormSliderBar<double> baseVelocitySlider { get; set; } = null!;
-        private LabelledSliderBar<double> tickRateSlider { get; set; } = null!;
+        private FormSliderBar<double> tickRateSlider { get; set; } = null!;
 
         [Resolved]
         private Editor? editor { get; set; }
@@ -37,77 +37,81 @@ namespace osu.Game.Rulesets.Mania.Edit.Setup
         {
             Children = new Drawable[]
             {
-                keyCountSlider = new LabelledSliderBar<float>
+                keyCountSlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsCsMania,
+                    Caption = BeatmapsetsStrings.ShowStatsCsMania,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = "The number of columns in the beatmap",
-                    Description = "The number of columns in the beatmap",
                     Current = new BindableFloat(Beatmap.Difficulty.CircleSize)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 1,
-                    }
                     },
-                specialStyle = new LabelledSwitchButton
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                specialStyle = new FormCheckBox
                 {
-                    Label = "Use special (N+1) style",
+                    Caption = "Use special (N+1) style",
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = "Changes one column to act as a classic \"scratch\" or \"special\" column, which can be moved around by the user's skin (to the left/right/centre). Generally used in 6K (5+1) or 8K (7+1) configurations.",
-                    Description = "Changes one column to act as a classic \"scratch\" or \"special\" column, which can be moved around by the user's skin (to the left/right/centre). Generally used in 6K (5+1) or 8K (7+1) configurations.",
                     Current = { Value = Beatmap.BeatmapInfo.SpecialStyle }
                 },
-                healthDrainSlider = new LabelledSliderBar<float>
+                healthDrainSlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsDrain,
+                    Caption = BeatmapsetsStrings.ShowStatsDrain,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.DrainRateDescription,
-                    Description = EditorSetupStrings.DrainRateDescription,
                     Current = new BindableFloat(Beatmap.Difficulty.DrainRate)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 0.1f,
-                    }
                     },
-                overallDifficultySlider = new LabelledSliderBar<float>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                overallDifficultySlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsAccuracy,
+                    Caption = BeatmapsetsStrings.ShowStatsAccuracy,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.OverallDifficultyDescription,
-                    Description = EditorSetupStrings.OverallDifficultyDescription,
                     Current = new BindableFloat(Beatmap.Difficulty.OverallDifficulty)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 0.1f,
-                    }
                     },
-                baseVelocitySlider = new LabelledSliderBar<double>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                baseVelocitySlider = new FormSliderBar<double>
                 {
-                    Label = EditorSetupStrings.BaseVelocity,
+                    Caption = EditorSetupStrings.BaseVelocity,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.BaseVelocityDescription,
-                    Description = EditorSetupStrings.BaseVelocityDescription,
                     Current = new BindableDouble(Beatmap.Difficulty.SliderMultiplier)
                     {
                         Default = 1.4,
                         MinValue = 0.4,
                         MaxValue = 3.6,
                         Precision = 0.01f,
-                    }
                     },
-                tickRateSlider = new LabelledSliderBar<double>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                tickRateSlider = new FormSliderBar<double>
                 {
-                    Label = EditorSetupStrings.TickRate,
+                    Caption = EditorSetupStrings.TickRate,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.TickRateDescription,
-                    Description = EditorSetupStrings.TickRateDescription,
                     Current = new BindableDouble(Beatmap.Difficulty.SliderTickRate)
                     {
                         Default = 1,
                         MinValue = 1,
                         MaxValue = 4,
                         Precision = 1,
-                    }
+                    },
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
                 },
             };
 

osu.Game.Rulesets.Mania/ManiaRuleset.cs

@@ -419,9 +419,12 @@ namespace osu.Game.Rulesets.Mania
             return new ManiaFilterCriteria();
         }
 
-        public override IEnumerable<SetupSection> CreateEditorSetupSections() =>
+        public override IEnumerable<Drawable> CreateEditorSetupSections() =>
         [
+            new MetadataSection(),
             new ManiaDifficultySection(),
+            new ResourcesSection(),
+            new DesignSection(),
         ];
 
         public int GetKeyCount(IBeatmapInfo beatmapInfo, IReadOnlyList<Mod>? mods = null)

osu.Game.Rulesets.Osu.Tests/Editor/TestSceneHitCirclePlacementBlueprint.cs

@@ -14,6 +14,6 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
     public partial class TestSceneHitCirclePlacementBlueprint : PlacementBlueprintTestScene
     {
         protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableHitCircle((HitCircle)hitObject);
-        protected override PlacementBlueprint CreateBlueprint() => new HitCirclePlacementBlueprint();
+        protected override HitObjectPlacementBlueprint CreateBlueprint() => new HitCirclePlacementBlueprint();
     }
 }

osu.Game.Rulesets.Osu.Tests/Editor/TestScenePreciseRotation.cs

@@ -116,7 +116,7 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
                 () => EditorBeatmap.HitObjects.OfType<HitCircle>().ElementAt(1).Position,
                 () => Is.EqualTo(OsuPlayfield.BASE_SIZE - new Vector2(200)));
 
-            AddStep("change rotation origin", () => getPopover().ChildrenOfType<EditorRadioButton>().ElementAt(1).TriggerClick());
+            AddStep("change rotation origin", () => getPopover().ChildrenOfType<EditorRadioButton>().ElementAt(2).TriggerClick());
             AddAssert("first object rotated 90deg around selection centre",
                 () => EditorBeatmap.HitObjects.OfType<HitCircle>().ElementAt(0).Position, () => Is.EqualTo(new Vector2(200, 200)));
             AddAssert("second object rotated 90deg around selection centre",

osu.Game.Rulesets.Osu.Tests/Editor/TestSceneSliderPlacementBlueprint.cs

@@ -514,6 +514,6 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
         private Slider? getSlider() => HitObjectContainer.Count > 0 ? ((DrawableSlider)HitObjectContainer[0]).HitObject : null;
 
         protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableSlider((Slider)hitObject);
-        protected override PlacementBlueprint CreateBlueprint() => new SliderPlacementBlueprint();
+        protected override HitObjectPlacementBlueprint CreateBlueprint() => new SliderPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Osu.Tests/Editor/TestSceneSliderSelectionBlueprint.cs

@@ -1,8 +1,6 @@
 // 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.
 
-#nullable disable
-
 using NUnit.Framework;
 using osu.Framework.Utils;
 using osu.Game.Beatmaps;
@@ -22,9 +20,9 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
 {
     public partial class TestSceneSliderSelectionBlueprint : SelectionBlueprintTestScene
     {
-        private Slider slider;
+        private Slider slider = null!;
-        private DrawableSlider drawableObject;
+        private DrawableSlider drawableObject = null!;
-        private TestSliderBlueprint blueprint;
+        private TestSliderBlueprint blueprint = null!;
 
         [SetUp]
         public void Setup() => Schedule(() =>
@@ -218,6 +216,9 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
 
             AddAssert("tail positioned correctly",
                 () => Precision.AlmostEquals(blueprint.TailOverlay.CirclePiece.ScreenSpaceDrawQuad.Centre, drawableObject.TailCircle.ScreenSpaceDrawQuad.Centre));
+
+            AddAssert("end drag marker positioned correctly",
+                () => Precision.AlmostEquals(blueprint.TailOverlay.EndDragMarker!.ToScreenSpace(blueprint.TailOverlay.EndDragMarker.OriginPosition), drawableObject.TailCircle.ScreenSpaceDrawQuad.Centre, 2));
         }
 
         private void moveMouseToControlPoint(int index)
@@ -230,14 +231,14 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
         }
 
         private void checkControlPointSelected(int index, bool selected)
-            => AddAssert($"control point {index} {(selected ? "selected" : "not selected")}", () => blueprint.ControlPointVisualiser.Pieces[index].IsSelected.Value == selected);
+            => AddAssert($"control point {index} {(selected ? "selected" : "not selected")}", () => blueprint.ControlPointVisualiser!.Pieces[index].IsSelected.Value == selected);
 
         private partial class TestSliderBlueprint : SliderSelectionBlueprint
         {
             public new SliderBodyPiece BodyPiece => base.BodyPiece;
             public new TestSliderCircleOverlay HeadOverlay => (TestSliderCircleOverlay)base.HeadOverlay;
             public new TestSliderCircleOverlay TailOverlay => (TestSliderCircleOverlay)base.TailOverlay;
-            public new PathControlPointVisualiser<Slider> ControlPointVisualiser => base.ControlPointVisualiser;
+            public new PathControlPointVisualiser<Slider>? ControlPointVisualiser => base.ControlPointVisualiser;
 
             public TestSliderBlueprint(Slider slider)
                 : base(slider)

osu.Game.Rulesets.Osu.Tests/Editor/TestSceneSpinnerPlacementBlueprint.cs

@@ -15,6 +15,6 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
     {
         protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableSpinner((Spinner)hitObject);
 
-        protected override PlacementBlueprint CreateBlueprint() => new SpinnerPlacementBlueprint();
+        protected override HitObjectPlacementBlueprint CreateBlueprint() => new SpinnerPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Osu.Tests/OsuDifficultyCalculatorTest.cs

@@ -15,22 +15,22 @@ namespace osu.Game.Rulesets.Osu.Tests
     {
         protected override string ResourceAssembly => "osu.Game.Rulesets.Osu.Tests";
 
-        [TestCase(6.710442985146793d, 239, "diffcalc-test")]
+        [TestCase(6.7171144000821119d, 239, "diffcalc-test")]
-        [TestCase(1.4386882251130073d, 54, "zero-length-sliders")]
+        [TestCase(1.4485749025771304d, 54, "zero-length-sliders")]
-        [TestCase(0.42506480230838789d, 4, "very-fast-slider")]
+        [TestCase(0.42630400627180914d, 4, "very-fast-slider")]
-        [TestCase(0.14102693012101306d, 2, "nan-slider")]
+        [TestCase(0.14143808967817237d, 2, "nan-slider")]
         public void Test(double expectedStarRating, int expectedMaxCombo, string name)
             => base.Test(expectedStarRating, expectedMaxCombo, name);
 
-        [TestCase(8.9742952703071666d, 239, "diffcalc-test")]
+        [TestCase(8.9825709931204205d, 239, "diffcalc-test")]
-        [TestCase(1.743180218215227d, 54, "zero-length-sliders")]
+        [TestCase(1.7550169162648608d, 54, "zero-length-sliders")]
-        [TestCase(0.55071082800473514d, 4, "very-fast-slider")]
+        [TestCase(0.55231632896800109d, 4, "very-fast-slider")]
         public void TestClockRateAdjusted(double expectedStarRating, int expectedMaxCombo, string name)
             => Test(expectedStarRating, expectedMaxCombo, name, new OsuModDoubleTime());
 
-        [TestCase(6.710442985146793d, 239, "diffcalc-test")]
+        [TestCase(6.7171144000821119d, 239, "diffcalc-test")]
-        [TestCase(1.4386882251130073d, 54, "zero-length-sliders")]
+        [TestCase(1.4485749025771304d, 54, "zero-length-sliders")]
-        [TestCase(0.42506480230838789d, 4, "very-fast-slider")]
+        [TestCase(0.42630400627180914d, 4, "very-fast-slider")]
         public void TestClassicMod(double expectedStarRating, int expectedMaxCombo, string name)
             => Test(expectedStarRating, expectedMaxCombo, name, new OsuModClassic());
 

osu.Game.Rulesets.Osu/Difficulty/Evaluators/RhythmEvaluator.cs

@@ -2,6 +2,8 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using osu.Game.Rulesets.Difficulty.Preprocessing;
 using osu.Game.Rulesets.Osu.Difficulty.Preprocessing;
 using osu.Game.Rulesets.Osu.Objects;
@@ -10,8 +12,10 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
 {
     public static class RhythmEvaluator
     {
-        private const int history_time_max = 5000; // 5 seconds of calculatingRhythmBonus max.
+        private const int history_time_max = 5 * 1000; // 5 seconds
-        private const double rhythm_multiplier = 0.75;
+        private const int history_objects_max = 32;
+        private const double rhythm_overall_multiplier = 0.95;
+        private const double rhythm_ratio_multiplier = 12.0;
 
         /// <summary>
         /// Calculates a rhythm multiplier for the difficulty of the tap associated with historic data of the current <see cref="OsuDifficultyHitObject"/>.
@@ -21,15 +25,22 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
             if (current.BaseObject is Spinner)
                 return 0;
 
-            int previousIslandSize = 0;
-
             double rhythmComplexitySum = 0;
-            int islandSize = 1;
+
+            double deltaDifferenceEpsilon = ((OsuDifficultyHitObject)current).HitWindowGreat * 0.3;
+
+            var island = new Island(deltaDifferenceEpsilon);
+            var previousIsland = new Island(deltaDifferenceEpsilon);
+
+            // we can't use dictionary here because we need to compare island with a tolerance
+            // which is impossible to pass into the hash comparer
+            var islandCounts = new List<(Island Island, int Count)>();
+
             double startRatio = 0; // store the ratio of the current start of an island to buff for tighter rhythms
 
             bool firstDeltaSwitch = false;
 
-            int historicalNoteCount = Math.Min(current.Index, 32);
+            int historicalNoteCount = Math.Min(current.Index, history_objects_max);
 
             int rhythmStart = 0;
 
@@ -39,74 +50,177 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
             OsuDifficultyHitObject prevObj = (OsuDifficultyHitObject)current.Previous(rhythmStart);
             OsuDifficultyHitObject lastObj = (OsuDifficultyHitObject)current.Previous(rhythmStart + 1);
 
+            // we go from the furthest object back to the current one
             for (int i = rhythmStart; i > 0; i--)
             {
                 OsuDifficultyHitObject currObj = (OsuDifficultyHitObject)current.Previous(i - 1);
 
-                double currHistoricalDecay = (history_time_max - (current.StartTime - currObj.StartTime)) / history_time_max; // scales note 0 to 1 from history to now
+                // scales note 0 to 1 from history to now
+                double timeDecay = (history_time_max - (current.StartTime - currObj.StartTime)) / history_time_max;
+                double noteDecay = (double)(historicalNoteCount - i) / historicalNoteCount;
 
-                currHistoricalDecay = Math.Min((double)(historicalNoteCount - i) / historicalNoteCount, currHistoricalDecay); // either we're limited by time or limited by object count.
+                double currHistoricalDecay = Math.Min(noteDecay, timeDecay); // either we're limited by time or limited by object count.
 
                 double currDelta = currObj.StrainTime;
                 double prevDelta = prevObj.StrainTime;
                 double lastDelta = lastObj.StrainTime;
-                double currRatio = 1.0 + 6.0 * Math.Min(0.5, Math.Pow(Math.Sin(Math.PI / (Math.Min(prevDelta, currDelta) / Math.Max(prevDelta, currDelta))), 2)); // fancy function to calculate rhythmbonuses.
 
-                double windowPenalty = Math.Min(1, Math.Max(0, Math.Abs(prevDelta - currDelta) - currObj.HitWindowGreat * 0.3) / (currObj.HitWindowGreat * 0.3));
+                // calculate how much current delta difference deserves a rhythm bonus
+                // this function is meant to reduce rhythm bonus for deltas that are multiples of each other (i.e 100 and 200)
+                double deltaDifferenceRatio = Math.Min(prevDelta, currDelta) / Math.Max(prevDelta, currDelta);
+                double currRatio = 1.0 + rhythm_ratio_multiplier * Math.Min(0.5, Math.Pow(Math.Sin(Math.PI / deltaDifferenceRatio), 2));
 
-                windowPenalty = Math.Min(1, windowPenalty);
+                // reduce ratio bonus if delta difference is too big
+                double fraction = Math.Max(prevDelta / currDelta, currDelta / prevDelta);
+                double fractionMultiplier = Math.Clamp(2.0 - fraction / 8.0, 0.0, 1.0);
 
-                double effectiveRatio = windowPenalty * currRatio;
+                double windowPenalty = Math.Min(1, Math.Max(0, Math.Abs(prevDelta - currDelta) - deltaDifferenceEpsilon) / deltaDifferenceEpsilon);
+
+                double effectiveRatio = windowPenalty * currRatio * fractionMultiplier;
 
                 if (firstDeltaSwitch)
                 {
-                    if (!(prevDelta > 1.25 * currDelta || prevDelta * 1.25 < currDelta))
+                    if (Math.Abs(prevDelta - currDelta) < deltaDifferenceEpsilon)
                     {
-                        if (islandSize < 7)
+                        // island is still progressing
-                            islandSize++; // island is still progressing, count size.
+                        island.AddDelta((int)currDelta);
                     }
                     else
                     {
-                        if (currObj.BaseObject is Slider) // bpm change is into slider, this is easy acc window
+                        // bpm change is into slider, this is easy acc window
+                        if (currObj.BaseObject is Slider)
                             effectiveRatio *= 0.125;
 
-                        if (prevObj.BaseObject is Slider) // bpm change was from a slider, this is easier typically than circle -> circle
+                        // bpm change was from a slider, this is easier typically than circle -> circle
-                            effectiveRatio *= 0.25;
+                        // unintentional side effect is that bursts with kicksliders at the ends might have lower difficulty than bursts without sliders
+                        if (prevObj.BaseObject is Slider)
+                            effectiveRatio *= 0.3;
 
-                        if (previousIslandSize == islandSize) // repeated island size (ex: triplet -> triplet)
+                        // repeated island polarity (2 -> 4, 3 -> 5)
-                            effectiveRatio *= 0.25;
+                        if (island.IsSimilarPolarity(previousIsland))
+                            effectiveRatio *= 0.5;
 
-                        if (previousIslandSize % 2 == islandSize % 2) // repeated island polartiy (2 -> 4, 3 -> 5)
+                        // previous increase happened a note ago, 1/1->1/2-1/4, dont want to buff this.
-                            effectiveRatio *= 0.50;
+                        if (lastDelta > prevDelta + deltaDifferenceEpsilon && prevDelta > currDelta + deltaDifferenceEpsilon)
-
-                        if (lastDelta > prevDelta + 10 && prevDelta > currDelta + 10) // previous increase happened a note ago, 1/1->1/2-1/4, dont want to buff this.
                             effectiveRatio *= 0.125;
 
-                        rhythmComplexitySum += Math.Sqrt(effectiveRatio * startRatio) * currHistoricalDecay * Math.Sqrt(4 + islandSize) / 2 * Math.Sqrt(4 + previousIslandSize) / 2;
+                        // repeated island size (ex: triplet -> triplet)
+                        // TODO: remove this nerf since its staying here only for balancing purposes because of the flawed ratio calculation
+                        if (previousIsland.DeltaCount == island.DeltaCount)
+                            effectiveRatio *= 0.5;
+
+                        var islandCount = islandCounts.FirstOrDefault(x => x.Island.Equals(island));
+
+                        if (islandCount != default)
+                        {
+                            int countIndex = islandCounts.IndexOf(islandCount);
+
+                            // only add island to island counts if they're going one after another
+                            if (previousIsland.Equals(island))
+                                islandCount.Count++;
+
+                            // repeated island (ex: triplet -> triplet)
+                            double power = logistic(island.Delta, 2.75, 0.24, 14);
+                            effectiveRatio *= Math.Min(3.0 / islandCount.Count, Math.Pow(1.0 / islandCount.Count, power));
+
+                            islandCounts[countIndex] = (islandCount.Island, islandCount.Count);
+                        }
+                        else
+                        {
+                            islandCounts.Add((island, 1));
+                        }
+
+                        // scale down the difficulty if the object is doubletappable
+                        double doubletapness = prevObj.GetDoubletapness(currObj);
+                        effectiveRatio *= 1 - doubletapness * 0.75;
+
+                        rhythmComplexitySum += Math.Sqrt(effectiveRatio * startRatio) * currHistoricalDecay;
 
                         startRatio = effectiveRatio;
 
-                        previousIslandSize = islandSize; // log the last island size.
+                        previousIsland = island;
 
-                        if (prevDelta * 1.25 < currDelta) // we're slowing down, stop counting
+                        if (prevDelta + deltaDifferenceEpsilon < currDelta) // we're slowing down, stop counting
                             firstDeltaSwitch = false; // if we're speeding up, this stays true and we keep counting island size.
 
-                        islandSize = 1;
+                        island = new Island((int)currDelta, deltaDifferenceEpsilon);
                     }
                 }
-                else if (prevDelta > 1.25 * currDelta) // we want to be speeding up.
+                else if (prevDelta > currDelta + deltaDifferenceEpsilon) // we're speeding up
                 {
                     // Begin counting island until we change speed again.
                     firstDeltaSwitch = true;
+
+                    // bpm change is into slider, this is easy acc window
+                    if (currObj.BaseObject is Slider)
+                        effectiveRatio *= 0.6;
+
+                    // bpm change was from a slider, this is easier typically than circle -> circle
+                    // unintentional side effect is that bursts with kicksliders at the ends might have lower difficulty than bursts without sliders
+                    if (prevObj.BaseObject is Slider)
+                        effectiveRatio *= 0.6;
+
                     startRatio = effectiveRatio;
-                    islandSize = 1;
+
+                    island = new Island((int)currDelta, deltaDifferenceEpsilon);
                 }
 
                 lastObj = prevObj;
                 prevObj = currObj;
             }
 
-            return Math.Sqrt(4 + rhythmComplexitySum * rhythm_multiplier) / 2; //produces multiplier that can be applied to strain. range [1, infinity) (not really though)
+            return Math.Sqrt(4 + rhythmComplexitySum * rhythm_overall_multiplier) / 2.0; // produces multiplier that can be applied to strain. range [1, infinity) (not really though)
+        }
+
+        private static double logistic(double x, double maxValue, double multiplier, double offset) => (maxValue / (1 + Math.Pow(Math.E, offset - (multiplier * x))));
+
+        private class Island : IEquatable<Island>
+        {
+            private readonly double deltaDifferenceEpsilon;
+
+            public Island(double epsilon)
+            {
+                deltaDifferenceEpsilon = epsilon;
+            }
+
+            public Island(int delta, double epsilon)
+            {
+                deltaDifferenceEpsilon = epsilon;
+                Delta = Math.Max(delta, OsuDifficultyHitObject.MIN_DELTA_TIME);
+                DeltaCount++;
+            }
+
+            public int Delta { get; private set; } = int.MaxValue;
+            public int DeltaCount { get; private set; }
+
+            public void AddDelta(int delta)
+            {
+                if (Delta == int.MaxValue)
+                    Delta = Math.Max(delta, OsuDifficultyHitObject.MIN_DELTA_TIME);
+
+                DeltaCount++;
+            }
+
+            public bool IsSimilarPolarity(Island other)
+            {
+                // TODO: consider islands to be of similar polarity only if they're having the same average delta (we don't want to consider 3 singletaps similar to a triple)
+                //       naively adding delta check here breaks _a lot_ of maps because of the flawed ratio calculation
+                return DeltaCount % 2 == other.DeltaCount % 2;
+            }
+
+            public bool Equals(Island? other)
+            {
+                if (other == null)
+                    return false;
+
+                return Math.Abs(Delta - other.Delta) < deltaDifferenceEpsilon &&
+                       DeltaCount == other.DeltaCount;
+            }
+
+            public override string ToString()
+            {
+                return $"{Delta}x{DeltaCount}";
+            }
         }
     }
 }

osu.Game.Rulesets.Osu/Difficulty/Evaluators/SpeedEvaluator.cs

@@ -13,7 +13,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
         private const double single_spacing_threshold = 125; // 1.25 circles distance between centers
         private const double min_speed_bonus = 75; // ~200BPM
         private const double speed_balancing_factor = 40;
-        private const double distance_multiplier = 0.94; // WARNING - DECREASE DISTANCE MULTIPLIER TO AVOID JASHIN BUFF
+        private const double distance_multiplier = 0.94;
 
         /// <summary>
         /// Evaluates the difficulty of tapping the current object, based on:
@@ -31,21 +31,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
             // derive strainTime for calculation
             var osuCurrObj = (OsuDifficultyHitObject)current;
             var osuPrevObj = current.Index > 0 ? (OsuDifficultyHitObject)current.Previous(0) : null;
-            var osuNextObj = (OsuDifficultyHitObject?)current.Next(0);
 
             double strainTime = osuCurrObj.StrainTime;
-            double doubletapness = 1;
+            double doubletapness = 1.0 - osuCurrObj.GetDoubletapness((OsuDifficultyHitObject?)osuCurrObj.Next(0));
-
-            // Nerf doubletappable doubles.
-            if (osuNextObj != null)
-            {
-                double currDeltaTime = Math.Max(1, osuCurrObj.DeltaTime);
-                double nextDeltaTime = Math.Max(1, osuNextObj.DeltaTime);
-                double deltaDifference = Math.Abs(nextDeltaTime - currDeltaTime);
-                double speedRatio = currDeltaTime / Math.Max(currDeltaTime, deltaDifference);
-                double windowRatio = Math.Pow(Math.Min(1, currDeltaTime / osuCurrObj.HitWindowGreat), 2);
-                doubletapness = Math.Pow(speedRatio, 1 - windowRatio);
-            }
 
             // Cap deltatime to the OD 300 hitwindow.
             // 0.93 is derived from making sure 260bpm OD8 streams aren't nerfed harshly, whilst 0.92 limits the effect of the cap.
@@ -68,7 +56,6 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
             double distanceBonus = Math.Pow(distance / single_spacing_threshold, 3.95) * distance_multiplier;
 
             // Base difficulty with all bonuses
-            // WARNING - CHANGED TO ADDITIVE TO AVOID AKOLIBED BUFF
             double difficulty = (1 + speedBonus + distanceBonus) * 1000 / strainTime;
 
             // Apply penalty if there's doubletappable doubles

osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyAttributes.cs

@@ -64,6 +64,12 @@ namespace osu.Game.Rulesets.Osu.Difficulty
         [JsonProperty("slider_factor")]
         public double SliderFactor { get; set; }
 
+        [JsonProperty("aim_difficult_strain_count")]
+        public double AimDifficultStrainCount { get; set; }
+
+        [JsonProperty("speed_difficult_strain_count")]
+        public double SpeedDifficultStrainCount { get; set; }
+
         /// <summary>
         /// The perceived approach rate inclusive of rate-adjusting mods (DT/HT/etc).
         /// </summary>
@@ -114,6 +120,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             yield return (ATTRIB_ID_DIFFICULTY, StarRating);
             yield return (ATTRIB_ID_FLASHLIGHT, FlashlightDifficulty);
             yield return (ATTRIB_ID_SLIDER_FACTOR, SliderFactor);
+
+            yield return (ATTRIB_ID_AIM_DIFFICULT_STRAIN_COUNT, AimDifficultStrainCount);
+            yield return (ATTRIB_ID_SPEED_DIFFICULT_STRAIN_COUNT, SpeedDifficultStrainCount);
             yield return (ATTRIB_ID_SPEED_NOTE_COUNT, SpeedNoteCount);
         }
 
@@ -128,8 +137,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             StarRating = values[ATTRIB_ID_DIFFICULTY];
             FlashlightDifficulty = values.GetValueOrDefault(ATTRIB_ID_FLASHLIGHT);
             SliderFactor = values[ATTRIB_ID_SLIDER_FACTOR];
+            AimDifficultStrainCount = values[ATTRIB_ID_AIM_DIFFICULT_STRAIN_COUNT];
+            SpeedDifficultStrainCount = values[ATTRIB_ID_SPEED_DIFFICULT_STRAIN_COUNT];
             SpeedNoteCount = values[ATTRIB_ID_SPEED_NOTE_COUNT];
-
             DrainRate = onlineInfo.DrainRate;
             HitCircleCount = onlineInfo.CircleCount;
             SliderCount = onlineInfo.SliderCount;

osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs

@@ -63,6 +63,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             {
                 baseFlashlightPerformance = Flashlight.DifficultyToPerformance(flashlightRating);
             }
+            double aimDifficultyStrainCount = ((OsuStrainSkill)skills[0]).CountDifficultStrains();
+            double speedDifficultyStrainCount = ((OsuStrainSkill)skills[2]).CountDifficultStrains();
 
             if (mods.Any(m => m is OsuModTouchDevice))
             {
@@ -96,7 +98,6 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             double preempt = IBeatmapDifficultyInfo.DifficultyRange(beatmap.Difficulty.ApproachRate, 1800, 1200, 450) / clockRate;
 
             double drainRate = beatmap.Difficulty.DrainRate;
-            int maxCombo = beatmap.GetMaxCombo();
 
             int hitCirclesCount = beatmap.HitObjects.Count(h => h is HitCircle);
             int sliderCount = beatmap.HitObjects.Count(h => h is Slider);
@@ -132,10 +133,12 @@ namespace osu.Game.Rulesets.Osu.Difficulty
                 HiddenDifficulty = hiddenRating,
                 FlashlightDifficulty = flashlightRating,
                 SliderFactor = sliderFactor,
+                AimDifficultStrainCount = aimDifficultyStrainCount,
+                SpeedDifficultStrainCount = speedDifficultyStrainCount,
                 ApproachRate = IBeatmapDifficultyInfo.InverseDifficultyRange(preempt, 1800, 1200, 450),
                 OverallDifficulty = (80 - hitWindowGreat) / 6,
                 DrainRate = drainRate,
-                MaxCombo = maxCombo,
+                MaxCombo = beatmap.GetMaxCombo(),
                 HitCircleCount = hitCirclesCount,
                 SliderCount = sliderCount,
                 SpinnerCount = spinnerCount,

osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs

@@ -14,7 +14,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty
 {
     public class OsuPerformanceCalculator : PerformanceCalculator
     {
-        public const double PERFORMANCE_BASE_MULTIPLIER = 1.14; // This is being adjusted to keep the final pp value scaled around what it used to be when changing things.
+        public const double PERFORMANCE_BASE_MULTIPLIER = 1.15; // This is being adjusted to keep the final pp value scaled around what it used to be when changing things.
+
+        private bool usingClassicSliderAccuracy;
 
         private double accuracy;
         private int scoreMaxCombo;
@@ -34,6 +36,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
         {
             var osuAttributes = (OsuDifficultyAttributes)attributes;
 
+            usingClassicSliderAccuracy = score.Mods.OfType<OsuModClassic>().Any(m => m.NoSliderHeadAccuracy.Value);
+
             accuracy = score.Accuracy;
             scoreMaxCombo = score.MaxCombo;
             countGreat = score.Statistics.GetValueOrDefault(HitResult.Great);
@@ -133,11 +137,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             double lengthBonus = CalculateDefaultLengthBonus(totalHits);
             aimValue *= lengthBonus;
 
-            // Penalize misses by assessing # of misses relative to the total # of objects. Default a 3% reduction for any # of misses.
             if (effectiveMissCount > 0)
-                aimValue *= 0.97 * Math.Pow(1 - Math.Pow(effectiveMissCount / totalHits, 0.775), effectiveMissCount);
+                aimValue *= calculateMissPenalty(effectiveMissCount, attributes.AimDifficultStrainCount);
-
-            aimValue *= getComboScalingFactor(attributes);
 
             if (score.Mods.Any(m => m is OsuModBlinds))
                 aimValue *= 1.3 + (totalHits * (0.0016 / (1 + 2 * effectiveMissCount)) * Math.Pow(accuracy, 16)) * (1 - 0.003 * attributes.DrainRate * attributes.DrainRate);
@@ -174,11 +175,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             double lengthBonus = CalculateDefaultLengthBonus(totalHits);
             speedValue *= lengthBonus;
 
-            // Penalize misses by assessing # of misses relative to the total # of objects. Default a 3% reduction for any # of misses.
             if (effectiveMissCount > 0)
-                speedValue *= 0.97 * Math.Pow(1 - Math.Pow(effectiveMissCount / totalHits, 0.775), Math.Pow(effectiveMissCount, .875));
+                speedValue *= calculateMissPenalty(effectiveMissCount, attributes.SpeedDifficultStrainCount);
-
-            speedValue *= getComboScalingFactor(attributes);
 
             if (score.Mods.Any(m => m is OsuModBlinds))
             {
@@ -199,7 +197,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             double relevantAccuracy = attributes.SpeedNoteCount == 0 ? 0 : (relevantCountGreat * 6.0 + relevantCountOk * 2.0 + relevantCountMeh) / (attributes.SpeedNoteCount * 6.0);
 
             // Scale the speed value with accuracy and OD.
-            speedValue *= (0.95 + Math.Pow(attributes.OverallDifficulty, 2) / 750) * Math.Pow((accuracy + relevantAccuracy) / 2.0, (14.5 - Math.Max(attributes.OverallDifficulty, 8)) / 2);
+            speedValue *= (0.95 + Math.Pow(attributes.OverallDifficulty, 2) / 750) * Math.Pow((accuracy + relevantAccuracy) / 2.0, (14.5 - attributes.OverallDifficulty) / 2);
 
             // Scale the speed value with # of 50s to punish doubletapping.
             speedValue *= Math.Pow(0.99, countMeh < totalHits / 500.0 ? 0 : countMeh - totalHits / 500.0);
@@ -215,6 +213,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             // 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;
+            if (!usingClassicSliderAccuracy)
+                amountHitObjectsWithAccuracy += attributes.SliderCount;
 
             if (amountHitObjectsWithAccuracy > 0)
                 betterAccuracyPercentage = ((countGreat - (totalHits - amountHitObjectsWithAccuracy)) * 6 + countOk * 2 + countMeh) / (double)(amountHitObjectsWithAccuracy * 6);
@@ -442,6 +442,10 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             return 1 + result;
         }
 
+        // Miss penalty assumes that a player will miss on the hardest parts of a map,
+        // so we use the amount of relatively difficult sections to adjust miss penalty
+        // to make it more punishing on maps with lower amount of hard sections.
+        private double calculateMissPenalty(double missCount, double difficultStrainCount) => 0.96 / ((missCount / (4 * Math.Pow(Math.Log(difficultStrainCount), 0.94))) + 1);
         private double getComboScalingFactor(OsuDifficultyAttributes attributes) => attributes.MaxCombo <= 0 ? 1.0 : Math.Min(Math.Pow(scoreMaxCombo, 0.8) / Math.Pow(attributes.MaxCombo, 0.8), 1.0);
         private int totalHits => countGreat + countOk + countMeh + countMiss;
 

osu.Game.Rulesets.Osu/Difficulty/Preprocessing/OsuDifficultyHitObject.cs

@@ -22,7 +22,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
         /// </summary>
         public const int NORMALISED_RADIUS = 50; // Change radius to 50 to make 100 the diameter. Easier for mental maths.
 
-        private const int min_delta_time = 25;
+        public const int MIN_DELTA_TIME = 25;
+
         private const float maximum_slider_radius = NORMALISED_RADIUS * 2.4f;
         private const float assumed_slider_radius = NORMALISED_RADIUS * 1.8f;
 
@@ -152,7 +153,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
             ClockRate = clockRate;
 
             // Capped to 25ms to prevent difficulty calculation breaking from simultaneous objects.
-            StrainTime = Math.Max(DeltaTime, min_delta_time);
+            StrainTime = Math.Max(DeltaTime, MIN_DELTA_TIME);
 
             if (BaseObject is Slider sliderObject)
             {
@@ -509,6 +510,24 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
             return Math.Clamp((time - fadeInStartTime) / fadeInDuration, 0.0, 1.0);
         }
 
+        /// <summary>
+        /// Returns how possible is it to doubletap this object together with the next one and get perfect judgement in range from 0 to 1
+        /// </summary>
+        public double GetDoubletapness(OsuDifficultyHitObject? osuNextObj)
+        {
+            if (osuNextObj != null)
+            {
+                double currDeltaTime = Math.Max(1, DeltaTime);
+                double nextDeltaTime = Math.Max(1, osuNextObj.DeltaTime);
+                double deltaDifference = Math.Abs(nextDeltaTime - currDeltaTime);
+                double speedRatio = currDeltaTime / Math.Max(currDeltaTime, deltaDifference);
+                double windowRatio = Math.Pow(Math.Min(1, currDeltaTime / HitWindowGreat), 2);
+                return 1.0 - Math.Pow(speedRatio, 1 - windowRatio);
+            }
+
+            return 0;
+        }
+
         private void setDistances(double clockRate)
         {
             if (BaseObject is Slider currentSlider)
@@ -516,7 +535,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
                 computeSliderCursorPosition(currentSlider);
                 // Bonus for repeat sliders until a better per nested object strain system can be achieved.
                 TravelDistance = currentSlider.LazyTravelDistance * (float)Math.Pow(1 + currentSlider.RepeatCount / 2.5, 1.0 / 2.5);
-                TravelTime = Math.Max(currentSlider.LazyTravelTime / clockRate, min_delta_time);
+                TravelTime = Math.Max(currentSlider.LazyTravelTime / clockRate, MIN_DELTA_TIME);
             }
 
             // We don't need to calculate either angle or distance when one of the last->curr objects is a spinner
@@ -540,8 +559,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
 
             if (lastObject is Slider lastSlider)
             {
-                double lastTravelTime = Math.Max(lastSlider.LazyTravelTime / clockRate, min_delta_time);
+                double lastTravelTime = Math.Max(lastSlider.LazyTravelTime / clockRate, MIN_DELTA_TIME);
-                MinimumJumpTime = Math.Max(StrainTime - lastTravelTime, min_delta_time);
+                MinimumJumpTime = Math.Max(StrainTime - lastTravelTime, MIN_DELTA_TIME);
 
                 //
                 // There are two types of slider-to-object patterns to consider in order to better approximate the real movement a player will take to jump between the hitobjects.

osu.Game.Rulesets.Osu/Difficulty/Skills/Aim.cs

@@ -22,7 +22,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
         private readonly bool withSliders;
 
         protected double CurrentStrain;
-        protected double SkillMultiplier => 25.15; // WARNING - INCREASED FROM 24.963 FOR BALANCING
+        protected double SkillMultiplier => 25.18; // WARNING - INCREASED FROM 24.963 FOR BALANCING
 
         protected override double CalculateInitialStrain(double time, DifficultyHitObject current) => CurrentStrain * StrainDecay(time - current.Previous(0).StartTime);
 
@@ -30,6 +30,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
         {
             CurrentStrain *= StrainDecay(current.DeltaTime);
             CurrentStrain += AimEvaluator.EvaluateDifficultyOf(current, withSliders) * SkillMultiplier;
+            ObjectStrains.Add(currentStrain);
 
             return CurrentStrain;
         }

osu.Game.Rulesets.Osu/Difficulty/Skills/OsuStrainSkill.cs

@@ -26,6 +26,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
         protected virtual double StrainDecayBase => 0.15;
 
         protected double StrainDecay(double ms) => Math.Pow(StrainDecayBase, ms / 1000);
+        protected List<double> ObjectStrains = new List<double>();
+        protected double Difficulty;
 
         protected OsuStrainSkill(Mod[] mods)
             : base(mods)
@@ -34,7 +36,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
 
         public override double DifficultyValue()
         {
-            double difficulty = 0;
+            Difficulty = 0;
             double weight = 1;
 
             // Sections with 0 strain are excluded to avoid worst-case time complexity of the following sort (e.g. /b/2351871).
@@ -54,11 +56,25 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
             // We're sorting from highest to lowest strain.
             foreach (double strain in strains.OrderDescending())
             {
-                difficulty += strain * weight;
+                Difficulty += strain * weight;
                 weight *= DecayWeight;
             }
 
-            return difficulty;
+            return Difficulty;
+        }
+
+        /// <summary>
+        /// Returns the number of strains weighted against the top strain.
+        /// The result is scaled by clock rate as it affects the total number of strains.
+        /// </summary>
+        public double CountDifficultStrains()
+        {
+            if (Difficulty == 0)
+                return 0.0;
+
+            double consistentTopStrain = Difficulty / 10; // What would the top strain be if all strain values were identical
+            // Use a weighted sum of all strains. Constants are arbitrary and give nice values
+            return ObjectStrains.Sum(s => 1.1 / (1 + Math.Exp(-10 * (s / consistentTopStrain - 0.88))));
         }
 
         /// <summary>

osu.Game.Rulesets.Osu/Difficulty/Skills/Speed.cs

@@ -6,7 +6,6 @@ using osu.Game.Rulesets.Difficulty.Preprocessing;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu.Difficulty.Evaluators;
 using osu.Game.Rulesets.Osu.Difficulty.Preprocessing;
-using System.Collections.Generic;
 using System.Linq;
 
 namespace osu.Game.Rulesets.Osu.Difficulty.Skills
@@ -24,8 +23,6 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
 
         protected override int ReducedSectionCount => 5;
 
-        private readonly List<double> objectStrains = new List<double>();
-
         public Speed(Mod[] mods)
             : base(mods)
         {
@@ -43,22 +40,21 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
             CurrentRhythm = currODHO.RhythmDifficulty;
             double totalStrain = CurrentStrain * CurrentRhythm;
 
-            objectStrains.Add(totalStrain);
+            ObjectStrains.Add(totalStrain);
 
             return totalStrain;
         }
 
         public double RelevantNoteCount()
         {
-            if (objectStrains.Count == 0)
+            if (ObjectStrains.Count == 0)
                 return 0;
 
-            double maxStrain = objectStrains.Max();
+            double maxStrain = ObjectStrains.Max();
-
             if (maxStrain == 0)
                 return 0;
 
-            return objectStrains.Sum(strain => 1.0 / (1.0 + Math.Exp(-(strain / maxStrain * 12.0 - 6.0))));
+            return ObjectStrains.Sum(strain => 1.0 / (1.0 + Math.Exp(-(strain / maxStrain * 12.0 - 6.0))));
         }
     }
 }

osu.Game.Rulesets.Osu/Edit/Blueprints/HitCircles/HitCirclePlacementBlueprint.cs

@@ -9,7 +9,7 @@ using osuTK.Input;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles
 {
-    public partial class HitCirclePlacementBlueprint : PlacementBlueprint
+    public partial class HitCirclePlacementBlueprint : HitObjectPlacementBlueprint
     {
         public new HitCircle HitObject => (HitCircle)base.HitObject;
 

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs

@@ -107,7 +107,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             if (segment.Count == 0)
                 return;
 
-            var first = segment[0];
+            PathControlPoint first = segment[0];
 
             if (first.Type != PathType.PERFECT_CURVE)
                 return;
@@ -273,10 +273,10 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
                     if (selectedPieces.Length != 1)
                         return false;
 
-                    var selectedPiece = selectedPieces.Single();
+                    PathControlPointPiece<T> selectedPiece = selectedPieces.Single();
-                    var selectedPoint = selectedPiece.ControlPoint;
+                    PathControlPoint selectedPoint = selectedPiece.ControlPoint;
 
-                    var validTypes = path_types;
+                    PathType?[] validTypes = path_types;
 
                     if (selectedPoint == controlPoints[0])
                         validTypes = validTypes.Where(t => t != null).ToArray();
@@ -313,7 +313,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
                     if (Pieces.All(p => !p.IsSelected.Value))
                         return false;
 
-                    var type = path_types[e.Key - Key.Number1];
+                    PathType? type = path_types[e.Key - Key.Number1];
 
                     // The first control point can never be inherit type
                     if (Pieces[0].IsSelected.Value && type == null)
@@ -353,9 +353,11 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
         {
             changeHandler?.BeginChange();
 
+            double originalDistance = hitObject.Path.Distance;
+
             foreach (var p in Pieces.Where(p => p.IsSelected.Value))
             {
-                var pointsInSegment = hitObject.Path.PointsInSegment(p.ControlPoint);
+                List<PathControlPoint> pointsInSegment = hitObject.Path.PointsInSegment(p.ControlPoint);
                 int indexInSegment = pointsInSegment.IndexOf(p.ControlPoint);
 
                 if (type?.Type == SplineType.PerfectCurve)
@@ -375,6 +377,11 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
 
             EnsureValidPathTypes();
 
+            if (hitObject.Path.Distance < originalDistance)
+                hitObject.SnapTo(distanceSnapProvider);
+            else
+                hitObject.Path.ExpectedDistance.Value = originalDistance;
+
             changeHandler?.EndChange();
         }
 
@@ -405,14 +412,14 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
         public void DragInProgress(DragEvent e)
         {
             Vector2[] oldControlPoints = hitObject.Path.ControlPoints.Select(cp => cp.Position).ToArray();
-            var oldPosition = hitObject.Position;
+            Vector2 oldPosition = hitObject.Position;
             double oldStartTime = hitObject.StartTime;
 
             if (selectedControlPoints.Contains(hitObject.Path.ControlPoints[0]))
             {
                 // Special handling for selections containing head control point - the position of the hit object changes which means the snapped position and time have to be taken into account
                 Vector2 newHeadPosition = Parent!.ToScreenSpace(e.MousePosition + (dragStartPositions[0] - dragStartPositions[draggedControlPointIndex]));
-                var result = positionSnapProvider?.FindSnappedPositionAndTime(newHeadPosition);
+                SnapResult result = positionSnapProvider?.FindSnappedPositionAndTime(newHeadPosition);
 
                 Vector2 movementDelta = Parent!.ToLocalSpace(result?.ScreenSpacePosition ?? newHeadPosition) - hitObject.Position;
 
@@ -421,7 +428,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
 
                 for (int i = 1; i < hitObject.Path.ControlPoints.Count; i++)
                 {
-                    var controlPoint = hitObject.Path.ControlPoints[i];
+                    PathControlPoint controlPoint = hitObject.Path.ControlPoints[i];
                     // Since control points are relative to the position of the hit object, all points that are _not_ selected
                     // need to be offset _back_ by the delta corresponding to the movement of the head point.
                     // All other selected control points (if any) will move together with the head point
@@ -432,13 +439,13 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             }
             else
             {
-                var result = positionSnapProvider?.FindSnappedPositionAndTime(Parent!.ToScreenSpace(e.MousePosition), SnapType.GlobalGrids);
+                SnapResult result = positionSnapProvider?.FindSnappedPositionAndTime(Parent!.ToScreenSpace(e.MousePosition), SnapType.GlobalGrids);
 
                 Vector2 movementDelta = Parent!.ToLocalSpace(result?.ScreenSpacePosition ?? Parent!.ToScreenSpace(e.MousePosition)) - dragStartPositions[draggedControlPointIndex] - hitObject.Position;
 
                 for (int i = 0; i < controlPoints.Count; ++i)
                 {
-                    var controlPoint = controlPoints[i];
+                    PathControlPoint controlPoint = controlPoints[i];
                     if (selectedControlPoints.Contains(controlPoint))
                         controlPoint.Position = dragStartPositions[i] + movementDelta;
                 }
@@ -488,8 +495,10 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
 
                 curveTypeItems = new List<MenuItem>();
 
-                foreach (PathType? type in path_types)
+                for (int i = 0; i < path_types.Length; ++i)
                 {
+                    PathType? type = path_types[i];
+
                     // special inherit case
                     if (type == null)
                     {
@@ -499,7 +508,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
                         curveTypeItems.Add(new OsuMenuItemSpacer());
                     }
 
-                    curveTypeItems.Add(createMenuItemForPathType(type));
+                    curveTypeItems.Add(createMenuItemForPathType(type, InputKey.Number1 + i));
                 }
 
                 if (selectedPieces.Any(piece => piece.ControlPoint.Type?.Type == SplineType.Catmull))
@@ -533,7 +542,15 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
 
                 return menuItems.ToArray();
 
-                CurveTypeMenuItem createMenuItemForPathType(PathType? type) => new CurveTypeMenuItem(type, _ => updatePathTypeOfSelectedPieces(type));
+                CurveTypeMenuItem createMenuItemForPathType(PathType? type, InputKey? key = null)
+                {
+                    Hotkey hotkey = default;
+
+                    if (key != null)
+                        hotkey = new Hotkey(new KeyCombination(InputKey.Alt, key.Value));
+
+                    return new CurveTypeMenuItem(type, _ => updatePathTypeOfSelectedPieces(type)) { Hotkey = hotkey };
+                }
             }
         }
 

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderCircleOverlay.cs

@@ -70,7 +70,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 
             if (endDragMarkerContainer != null)
             {
-                endDragMarkerContainer.Position = circle.Position;
+                endDragMarkerContainer.Position = circle.Position + slider.StackOffset;
                 endDragMarkerContainer.Scale = CirclePiece.Scale * 1.2f;
                 var diff = slider.Path.PositionAt(1) - slider.Path.PositionAt(0.99f);
                 endDragMarkerContainer.Rotation = float.RadiansToDegrees(MathF.Atan2(diff.Y, diff.X));

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderPlacementBlueprint.cs

@@ -21,7 +21,7 @@ using osuTK.Input;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 {
-    public partial class SliderPlacementBlueprint : PlacementBlueprint
+    public partial class SliderPlacementBlueprint : HitObjectPlacementBlueprint
     {
         public new Slider HitObject => (Slider)base.HitObject;
 
@@ -401,7 +401,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             if (state == SliderPlacementState.Drawing)
                 HitObject.Path.ExpectedDistance.Value = (float)HitObject.Path.CalculatedDistance;
             else
-                HitObject.Path.ExpectedDistance.Value = distanceSnapProvider?.FindSnappedDistance(HitObject, (float)HitObject.Path.CalculatedDistance) ?? (float)HitObject.Path.CalculatedDistance;
+                HitObject.Path.ExpectedDistance.Value = distanceSnapProvider?.FindSnappedDistance(HitObject, (float)HitObject.Path.CalculatedDistance, DistanceSnapTarget.Start) ?? (float)HitObject.Path.CalculatedDistance;
 
             bodyPiece.UpdateFrom(HitObject);
             headCirclePiece.UpdateFrom(HitObject.HeadCircle);

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs

@@ -11,6 +11,7 @@ using osu.Framework.Caching;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Primitives;
 using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Input.Bindings;
 using osu.Framework.Input.Events;
 using osu.Framework.Utils;
 using osu.Game.Audio;
@@ -269,7 +270,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             {
                 double minDistance = distanceSnapProvider?.GetBeatSnapDistanceAt(HitObject, false) * oldVelocityMultiplier ?? 1;
                 // Add a small amount to the proposed distance to make it easier to snap to the full length of the slider.
-                proposedDistance = distanceSnapProvider?.FindSnappedDistance(HitObject, (float)proposedDistance + 1) ?? proposedDistance;
+                proposedDistance = distanceSnapProvider?.FindSnappedDistance(HitObject, (float)proposedDistance + 1, DistanceSnapTarget.Start) ?? proposedDistance;
                 proposedDistance = MathHelper.Clamp(proposedDistance, minDistance, HitObject.Path.CalculatedDistance);
             }
 
@@ -593,8 +594,14 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
                 changeHandler?.BeginChange();
                 addControlPoint(lastRightClickPosition);
                 changeHandler?.EndChange();
-            }),
+            })
-            new OsuMenuItem("Convert to stream", MenuItemType.Destructive, convertToStream),
+            {
+                Hotkey = new Hotkey(new KeyCombination(InputKey.Control, InputKey.MouseLeft))
+            },
+            new OsuMenuItem("Convert to stream", MenuItemType.Destructive, convertToStream)
+            {
+                Hotkey = new Hotkey(new KeyCombination(InputKey.Control, InputKey.Shift, InputKey.F))
+            },
         };
 
         // Always refer to the drawable object's slider body so subsequent movement deltas are calculated with updated positions.

osu.Game.Rulesets.Osu/Edit/Blueprints/Spinners/SpinnerPlacementBlueprint.cs

@@ -13,7 +13,7 @@ using osuTK.Input;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners
 {
-    public partial class SpinnerPlacementBlueprint : PlacementBlueprint
+    public partial class SpinnerPlacementBlueprint : HitObjectPlacementBlueprint
     {
         public new Spinner HitObject => (Spinner)base.HitObject;
 

osu.Game.Rulesets.Osu/Edit/HitCircleCompositionTool.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Osu.Objects;
 
 namespace osu.Game.Rulesets.Osu.Edit
 {
-    public class HitCircleCompositionTool : HitObjectCompositionTool
+    public class HitCircleCompositionTool : CompositionTool
     {
         public HitCircleCompositionTool()
             : base(nameof(HitCircle))
@@ -19,6 +19,6 @@ namespace osu.Game.Rulesets.Osu.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new HitCirclePlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new HitCirclePlacementBlueprint();
     }
 }

osu.Game.Rulesets.Osu/Edit/OsuGridToolboxGroup.cs

@@ -1,6 +1,7 @@
 // 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 System.Linq;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
@@ -10,10 +11,12 @@ using osu.Framework.Graphics.Shapes;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Input.Bindings;
 using osu.Framework.Input.Events;
+using osu.Framework.Utils;
 using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Input.Bindings;
 using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu.UI;
 using osu.Game.Screens.Edit;
 using osu.Game.Screens.Edit.Components.RadioButtons;
@@ -90,6 +93,8 @@ namespace osu.Game.Rulesets.Osu.Edit
         private ExpandableSlider<float> gridLinesRotationSlider = null!;
         private EditorRadioButtonCollection gridTypeButtons = null!;
 
+        private ExpandableButton useSelectedObjectPositionButton = null!;
+
         public OsuGridToolboxGroup()
             : base("grid")
         {
@@ -112,6 +117,20 @@ namespace osu.Game.Rulesets.Osu.Edit
                     Current = StartPositionY,
                     KeyboardStep = 1,
                 },
+                useSelectedObjectPositionButton = new ExpandableButton
+                {
+                    ExpandedLabelText = "Centre on selected object",
+                    Action = () =>
+                    {
+                        if (editorBeatmap.SelectedHitObjects.Count != 1)
+                            return;
+
+                        var position = ((IHasPosition)editorBeatmap.SelectedHitObjects.Single()).Position;
+                        StartPosition.Value = new Vector2(MathF.Round(position.X), MathF.Round(position.Y));
+                        updateEnabledStates();
+                    },
+                    RelativeSizeAxes = Axes.X,
+                },
                 spacingSlider = new ExpandableSlider<float>
                 {
                     Current = Spacing,
@@ -172,6 +191,13 @@ namespace osu.Game.Rulesets.Osu.Edit
                 StartPosition.Value = new Vector2(StartPosition.Value.X, y.NewValue);
             }, true);
 
+            StartPosition.BindValueChanged(pos =>
+            {
+                StartPositionX.Value = pos.NewValue.X;
+                StartPositionY.Value = pos.NewValue.Y;
+                updateEnabledStates();
+            });
+
             Spacing.BindValueChanged(spacing =>
             {
                 spacingSlider.ContractedLabelText = $"S: {spacing.NewValue:N0}";
@@ -186,12 +212,6 @@ namespace osu.Game.Rulesets.Osu.Edit
                 gridLinesRotationSlider.ExpandedLabelText = $"Rotation: {rotation.NewValue:#,0.##}";
             }, true);
 
-            expandingContainer?.Expanded.BindValueChanged(v =>
-            {
-                gridTypeButtons.FadeTo(v.NewValue ? 1f : 0f, 500, Easing.OutQuint);
-                gridTypeButtons.BypassAutoSizeAxes = !v.NewValue ? Axes.Y : Axes.None;
-            }, true);
-
             GridType.BindValueChanged(v =>
             {
                 GridLinesRotation.Disabled = v.NewValue == PositionSnapGridType.Circle;
@@ -211,6 +231,22 @@ namespace osu.Game.Rulesets.Osu.Edit
                         break;
                 }
             }, true);
+
+            editorBeatmap.BeatmapReprocessed += updateEnabledStates;
+            editorBeatmap.SelectedHitObjects.BindCollectionChanged((_, _) => updateEnabledStates());
+            expandingContainer?.Expanded.BindValueChanged(v =>
+            {
+                gridTypeButtons.FadeTo(v.NewValue ? 1f : 0f, 500, Easing.OutQuint);
+                gridTypeButtons.BypassAutoSizeAxes = !v.NewValue ? Axes.Y : Axes.None;
+                updateEnabledStates();
+            }, true);
+        }
+
+        private void updateEnabledStates()
+        {
+            useSelectedObjectPositionButton.Enabled.Value = expandingContainer?.Expanded.Value == true
+                                                            && editorBeatmap.SelectedHitObjects.Count == 1
+                                                            && !Precision.AlmostEquals(StartPosition.Value, ((IHasPosition)editorBeatmap.SelectedHitObjects.Single()).Position, 0.5f);
         }
 
         private void nextGridSize()

osu.Game.Rulesets.Osu/Edit/OsuHitObjectComposer.cs

@@ -41,7 +41,7 @@ namespace osu.Game.Rulesets.Osu.Edit
         protected override DrawableRuleset<OsuHitObject> CreateDrawableRuleset(Ruleset ruleset, IBeatmap beatmap, IReadOnlyList<Mod> mods)
             => new DrawableOsuEditorRuleset(ruleset, beatmap, mods);
 
-        protected override IReadOnlyList<HitObjectCompositionTool> CompositionTools => new HitObjectCompositionTool[]
+        protected override IReadOnlyList<CompositionTool> CompositionTools => new CompositionTool[]
         {
             new HitCircleCompositionTool(),
             new SliderCompositionTool(),
@@ -106,6 +106,7 @@ namespace osu.Game.Rulesets.Osu.Edit
                     {
                         RotationHandler = BlueprintContainer.SelectionHandler.RotationHandler,
                         ScaleHandler = (OsuSelectionScaleHandler)BlueprintContainer.SelectionHandler.ScaleHandler,
+                        GridToolbox = OsuGridToolboxGroup,
                     },
                     new GenerateToolboxGroup(),
                     FreehandSliderToolboxGroup
@@ -368,6 +369,8 @@ namespace osu.Game.Rulesets.Osu.Edit
                 gridSnapMomentary = shiftPressed;
                 rectangularGridSnapToggle.Value = rectangularGridSnapToggle.Value == TernaryState.False ? TernaryState.True : TernaryState.False;
             }
+
+            DistanceSnapProvider.HandleToggleViaKey(key);
         }
 
         private DistanceSnapGrid createDistanceSnapGrid(IEnumerable<HitObject> selectedHitObjects)

osu.Game.Rulesets.Osu/Edit/OsuSelectionHandler.cs

@@ -3,6 +3,7 @@
 
 using System.Collections.Generic;
 using System.Linq;
+using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Primitives;
 using osu.Framework.Graphics.UserInterface;
@@ -25,6 +26,9 @@ namespace osu.Game.Rulesets.Osu.Edit
 {
     public partial class OsuSelectionHandler : EditorSelectionHandler
     {
+        [Resolved]
+        private OsuGridToolboxGroup gridToolbox { get; set; } = null!;
+
         protected override void OnSelectionChanged()
         {
             base.OnSelectionChanged();
@@ -123,13 +127,43 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
             var hitObjects = selectedMovableObjects;
 
-            var flipQuad = flipOverOrigin ? new Quad(0, 0, OsuPlayfield.BASE_SIZE.X, OsuPlayfield.BASE_SIZE.Y) : GeometryUtils.GetSurroundingQuad(hitObjects);
+            // If we're flipping over the origin, we take the grid origin position from the grid toolbox.
+            var flipQuad = flipOverOrigin ? new Quad(gridToolbox.StartPositionX.Value, gridToolbox.StartPositionY.Value, 0, 0) : GeometryUtils.GetSurroundingQuad(hitObjects);
+            Vector2 flipAxis = direction == Direction.Vertical ? Vector2.UnitY : Vector2.UnitX;
+
+            if (flipOverOrigin)
+            {
+                // If we're flipping over the origin, we take one of the axes of the grid.
+                // Take the axis closest to the direction we want to flip over.
+                switch (gridToolbox.GridType.Value)
+                {
+                    case PositionSnapGridType.Square:
+                        flipAxis = GeometryUtils.RotateVector(Vector2.UnitX, -((gridToolbox.GridLinesRotation.Value + 360 + 45) % 90 - 45));
+                        flipAxis = direction == Direction.Vertical ? flipAxis.PerpendicularLeft : flipAxis;
+                        break;
+
+                    case PositionSnapGridType.Triangle:
+                        // Hex grid has 3 axes, so you can not directly flip over one of the axes,
+                        // however it's still possible to achieve that flip by combining multiple flips over the other axes.
+                        // Angle degree range for vertical = (-120, -60]
+                        // Angle degree range for horizontal = [-30, 30)
+                        flipAxis = direction == Direction.Vertical
+                            ? GeometryUtils.RotateVector(Vector2.UnitX, -((gridToolbox.GridLinesRotation.Value + 360 + 30) % 60 + 60))
+                            : GeometryUtils.RotateVector(Vector2.UnitX, -((gridToolbox.GridLinesRotation.Value + 360) % 60 - 30));
+                        break;
+                }
+            }
+
+            var controlPointFlipQuad = new Quad();
 
             bool didFlip = false;
 
             foreach (var h in hitObjects)
             {
-                var flippedPosition = GeometryUtils.GetFlippedPosition(direction, flipQuad, h.Position);
+                var flippedPosition = GeometryUtils.GetFlippedPosition(flipAxis, flipQuad, h.Position);
+
+                // Clamp the flipped position inside the playfield bounds, because the flipped position might be outside the playfield bounds if the origin is not centered.
+                flippedPosition = Vector2.Clamp(flippedPosition, Vector2.Zero, OsuPlayfield.BASE_SIZE);
 
                 if (!Precision.AlmostEquals(flippedPosition, h.Position))
                 {
@@ -142,12 +176,7 @@ namespace osu.Game.Rulesets.Osu.Edit
                     didFlip = true;
 
                     foreach (var cp in slider.Path.ControlPoints)
-                    {
+                        cp.Position = GeometryUtils.GetFlippedPosition(flipAxis, controlPointFlipQuad, cp.Position);
-                        cp.Position = new Vector2(
-                            (direction == Direction.Horizontal ? -1 : 1) * cp.Position.X,
-                            (direction == Direction.Vertical ? -1 : 1) * cp.Position.Y
-                        );
-                    }
                 }
             }
 

osu.Game.Rulesets.Osu/Edit/OsuSelectionRotationHandler.cs

@@ -47,7 +47,6 @@ namespace osu.Game.Rulesets.Osu.Edit
 
         private OsuHitObject[]? objectsInRotation;
 
-        private Vector2? defaultOrigin;
         private Dictionary<OsuHitObject, Vector2>? originalPositions;
         private Dictionary<IHasPath, Vector2[]>? originalPathControlPointPositions;
 
@@ -61,7 +60,7 @@ namespace osu.Game.Rulesets.Osu.Edit
             changeHandler?.BeginChange();
 
             objectsInRotation = selectedMovableObjects.ToArray();
-            defaultOrigin = GeometryUtils.GetSurroundingQuad(objectsInRotation).Centre;
+            DefaultOrigin = GeometryUtils.MinimumEnclosingCircle(objectsInRotation).Item1;
             originalPositions = objectsInRotation.ToDictionary(obj => obj, obj => obj.Position);
             originalPathControlPointPositions = objectsInRotation.OfType<IHasPath>().ToDictionary(
                 obj => obj,
@@ -73,9 +72,9 @@ namespace osu.Game.Rulesets.Osu.Edit
             if (!OperationInProgress.Value)
                 throw new InvalidOperationException($"Cannot {nameof(Update)} a rotate operation without calling {nameof(Begin)} first!");
 
-            Debug.Assert(objectsInRotation != null && originalPositions != null && originalPathControlPointPositions != null && defaultOrigin != null);
+            Debug.Assert(objectsInRotation != null && originalPositions != null && originalPathControlPointPositions != null && DefaultOrigin != null);
 
-            Vector2 actualOrigin = origin ?? defaultOrigin.Value;
+            Vector2 actualOrigin = origin ?? DefaultOrigin.Value;
 
             foreach (var ho in objectsInRotation)
             {
@@ -103,7 +102,7 @@ namespace osu.Game.Rulesets.Osu.Edit
             objectsInRotation = null;
             originalPositions = null;
             originalPathControlPointPositions = null;
-            defaultOrigin = null;
+            DefaultOrigin = null;
         }
 
         private IEnumerable<OsuHitObject> selectedMovableObjects => selectedItems.Cast<OsuHitObject>()

osu.Game.Rulesets.Osu/Edit/OsuSelectionScaleHandler.cs

@@ -69,6 +69,7 @@ namespace osu.Game.Rulesets.Osu.Edit
 
         private Dictionary<OsuHitObject, OriginalHitObjectState>? objectsInScale;
         private Vector2? defaultOrigin;
+        private List<Vector2>? originalConvexHull;
 
         public override void Begin()
         {
@@ -83,10 +84,13 @@ namespace osu.Game.Rulesets.Osu.Edit
             OriginalSurroundingQuad = objectsInScale.Count == 1 && objectsInScale.First().Key is Slider slider
                 ? GeometryUtils.GetSurroundingQuad(slider.Path.ControlPoints.Select(p => slider.Position + p.Position))
                 : GeometryUtils.GetSurroundingQuad(objectsInScale.Keys);
-            defaultOrigin = OriginalSurroundingQuad.Value.Centre;
+            originalConvexHull = objectsInScale.Count == 1 && objectsInScale.First().Key is Slider slider2
+                ? GeometryUtils.GetConvexHull(slider2.Path.ControlPoints.Select(p => slider2.Position + p.Position))
+                : GeometryUtils.GetConvexHull(objectsInScale.Keys);
+            defaultOrigin = GeometryUtils.MinimumEnclosingCircle(originalConvexHull).Item1;
         }
 
-        public override void Update(Vector2 scale, Vector2? origin = null, Axes adjustAxis = Axes.Both)
+        public override void Update(Vector2 scale, Vector2? origin = null, Axes adjustAxis = Axes.Both, float axisRotation = 0)
         {
             if (!OperationInProgress.Value)
                 throw new InvalidOperationException($"Cannot {nameof(Update)} a scale operation without calling {nameof(Begin)} first!");
@@ -94,23 +98,22 @@ namespace osu.Game.Rulesets.Osu.Edit
             Debug.Assert(objectsInScale != null && defaultOrigin != null && OriginalSurroundingQuad != null);
 
             Vector2 actualOrigin = origin ?? defaultOrigin.Value;
+            scale = clampScaleToAdjustAxis(scale, adjustAxis);
 
             // for the time being, allow resizing of slider paths only if the slider is
             // the only hit object selected. with a group selection, it's likely the user
             // is not looking to change the duration of the slider but expand the whole pattern.
             if (objectsInScale.Count == 1 && objectsInScale.First().Key is Slider slider)
             {
-                var originalInfo = objectsInScale[slider];
+                scaleSlider(slider, scale, actualOrigin, objectsInScale[slider], axisRotation);
-                Debug.Assert(originalInfo.PathControlPointPositions != null && originalInfo.PathControlPointTypes != null);
-                scaleSlider(slider, scale, originalInfo.PathControlPointPositions, originalInfo.PathControlPointTypes);
             }
             else
             {
-                scale = ClampScaleToPlayfieldBounds(scale, actualOrigin);
+                scale = ClampScaleToPlayfieldBounds(scale, actualOrigin, adjustAxis, axisRotation);
 
                 foreach (var (ho, originalState) in objectsInScale)
                 {
-                    ho.Position = GeometryUtils.GetScaledPosition(scale, actualOrigin, originalState.Position);
+                    ho.Position = GeometryUtils.GetScaledPosition(scale, actualOrigin, originalState.Position, axisRotation);
                 }
             }
 
@@ -134,21 +137,45 @@ namespace osu.Game.Rulesets.Osu.Edit
         private IEnumerable<OsuHitObject> selectedMovableObjects => selectedItems.Cast<OsuHitObject>()
                                                                                  .Where(h => h is not Spinner);
 
-        private void scaleSlider(Slider slider, Vector2 scale, Vector2[] originalPathPositions, PathType?[] originalPathTypes)
+        private Vector2 clampScaleToAdjustAxis(Vector2 scale, Axes adjustAxis)
         {
+            switch (adjustAxis)
+            {
+                case Axes.Y:
+                    scale.X = 1;
+                    break;
+
+                case Axes.X:
+                    scale.Y = 1;
+                    break;
+
+                case Axes.None:
+                    scale = Vector2.One;
+                    break;
+            }
+
+            return scale;
+        }
+
+        private void scaleSlider(Slider slider, Vector2 scale, Vector2 origin, OriginalHitObjectState originalInfo, float axisRotation = 0)
+        {
+            Debug.Assert(originalInfo.PathControlPointPositions != null && originalInfo.PathControlPointTypes != null);
+
             scale = Vector2.ComponentMax(scale, new Vector2(Precision.FLOAT_EPSILON));
 
             // Maintain the path types in case they were defaulted to bezier at some point during scaling
             for (int i = 0; i < slider.Path.ControlPoints.Count; i++)
             {
-                slider.Path.ControlPoints[i].Position = originalPathPositions[i] * scale;
+                slider.Path.ControlPoints[i].Position = GeometryUtils.GetScaledPosition(scale, Vector2.Zero, originalInfo.PathControlPointPositions[i], axisRotation);
-                slider.Path.ControlPoints[i].Type = originalPathTypes[i];
+                slider.Path.ControlPoints[i].Type = originalInfo.PathControlPointTypes[i];
             }
 
             // Snap the slider's length to the current beat divisor
             // to calculate the final resulting duration / bounding box before the final checks.
             slider.SnapTo(snapProvider);
 
+            slider.Position = GeometryUtils.GetScaledPosition(scale, origin, originalInfo.Position, axisRotation);
+
             //if sliderhead or sliderend end up outside playfield, revert scaling.
             Quad scaledQuad = GeometryUtils.GetSurroundingQuad(new OsuHitObject[] { slider });
             (bool xInBounds, bool yInBounds) = isQuadInBounds(scaledQuad);
@@ -157,7 +184,9 @@ namespace osu.Game.Rulesets.Osu.Edit
                 return;
 
             for (int i = 0; i < slider.Path.ControlPoints.Count; i++)
-                slider.Path.ControlPoints[i].Position = originalPathPositions[i];
+                slider.Path.ControlPoints[i].Position = originalInfo.PathControlPointPositions[i];
+
+            slider.Position = originalInfo.Position;
 
             // Snap the slider's length again to undo the potentially-invalid length applied by the previous snap.
             slider.SnapTo(snapProvider);
@@ -176,11 +205,13 @@ namespace osu.Game.Rulesets.Osu.Edit
         /// </summary>
         /// <param name="origin">The origin from which the scale operation is performed</param>
         /// <param name="scale">The scale to be clamped</param>
+        /// <param name="adjustAxis">The axes to adjust the scale in.</param>
+        /// <param name="axisRotation">The rotation of the axes in degrees</param>
         /// <returns>The clamped scale vector</returns>
-        public Vector2 ClampScaleToPlayfieldBounds(Vector2 scale, Vector2? origin = null)
+        public Vector2 ClampScaleToPlayfieldBounds(Vector2 scale, Vector2? origin = null, Axes adjustAxis = Axes.Both, float axisRotation = 0)
         {
             //todo: this is not always correct for selections involving sliders. This approximation assumes each point is scaled independently, but sliderends move with the sliderhead.
-            if (objectsInScale == null)
+            if (objectsInScale == null || adjustAxis == Axes.None)
                 return scale;
 
             Debug.Assert(defaultOrigin != null && OriginalSurroundingQuad != null);
@@ -188,24 +219,60 @@ namespace osu.Game.Rulesets.Osu.Edit
             if (objectsInScale.Count == 1 && objectsInScale.First().Key is Slider slider)
                 origin = slider.Position;
 
+            float cos = MathF.Cos(float.DegreesToRadians(-axisRotation));
+            float sin = MathF.Sin(float.DegreesToRadians(-axisRotation));
+            scale = clampScaleToAdjustAxis(scale, adjustAxis);
             Vector2 actualOrigin = origin ?? defaultOrigin.Value;
+            IEnumerable<Vector2> points;
+
+            if (axisRotation == 0)
+            {
                 var selectionQuad = OriginalSurroundingQuad.Value;
+                points = new[]
+                {
+                    selectionQuad.TopLeft,
+                    selectionQuad.TopRight,
+                    selectionQuad.BottomLeft,
+                    selectionQuad.BottomRight
+                };
+            }
+            else
+                points = originalConvexHull!;
 
-            var tl1 = Vector2.Divide(-actualOrigin, selectionQuad.TopLeft - actualOrigin);
+            foreach (var point in points)
-            var tl2 = Vector2.Divide(OsuPlayfield.BASE_SIZE - actualOrigin, selectionQuad.TopLeft - actualOrigin);
+            {
-            var br1 = Vector2.Divide(-actualOrigin, selectionQuad.BottomRight - actualOrigin);
+                scale = clampToBound(scale, point, Vector2.Zero);
-            var br2 = Vector2.Divide(OsuPlayfield.BASE_SIZE - actualOrigin, selectionQuad.BottomRight - actualOrigin);
+                scale = clampToBound(scale, point, OsuPlayfield.BASE_SIZE);
-
+            }
-            if (!Precision.AlmostEquals(selectionQuad.TopLeft.X - actualOrigin.X, 0))
-                scale.X = selectionQuad.TopLeft.X - actualOrigin.X < 0 ? MathHelper.Clamp(scale.X, tl2.X, tl1.X) : MathHelper.Clamp(scale.X, tl1.X, tl2.X);
-            if (!Precision.AlmostEquals(selectionQuad.TopLeft.Y - actualOrigin.Y, 0))
-                scale.Y = selectionQuad.TopLeft.Y - actualOrigin.Y < 0 ? MathHelper.Clamp(scale.Y, tl2.Y, tl1.Y) : MathHelper.Clamp(scale.Y, tl1.Y, tl2.Y);
-            if (!Precision.AlmostEquals(selectionQuad.BottomRight.X - actualOrigin.X, 0))
-                scale.X = selectionQuad.BottomRight.X - actualOrigin.X < 0 ? MathHelper.Clamp(scale.X, br2.X, br1.X) : MathHelper.Clamp(scale.X, br1.X, br2.X);
-            if (!Precision.AlmostEquals(selectionQuad.BottomRight.Y - actualOrigin.Y, 0))
-                scale.Y = selectionQuad.BottomRight.Y - actualOrigin.Y < 0 ? MathHelper.Clamp(scale.Y, br2.Y, br1.Y) : MathHelper.Clamp(scale.Y, br1.Y, br2.Y);
 
             return Vector2.ComponentMax(scale, new Vector2(Precision.FLOAT_EPSILON));
+
+            float minPositiveComponent(Vector2 v) => MathF.Min(v.X < 0 ? float.PositiveInfinity : v.X, v.Y < 0 ? float.PositiveInfinity : v.Y);
+
+            Vector2 clampToBound(Vector2 s, Vector2 p, Vector2 bound)
+            {
+                p -= actualOrigin;
+                bound -= actualOrigin;
+                var a = new Vector2(cos * cos * p.X - sin * cos * p.Y, -sin * cos * p.X + sin * sin * p.Y);
+                var b = new Vector2(sin * sin * p.X + sin * cos * p.Y, sin * cos * p.X + cos * cos * p.Y);
+
+                switch (adjustAxis)
+                {
+                    case Axes.X:
+                        s.X = MathF.Min(scale.X, minPositiveComponent(Vector2.Divide(bound - b, a)));
+                        break;
+
+                    case Axes.Y:
+                        s.Y = MathF.Min(scale.Y, minPositiveComponent(Vector2.Divide(bound - a, b)));
+                        break;
+
+                    case Axes.Both:
+                        s = Vector2.ComponentMin(s, s * minPositiveComponent(Vector2.Divide(bound, a * s.X + b * s.Y)));
+                        break;
+                }
+
+                return s;
+            }
         }
 
         private void moveSelectionInBounds()

osu.Game.Rulesets.Osu/Edit/PreciseRotationPopover.cs

@@ -1,6 +1,7 @@
 // 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 System.Linq;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
@@ -19,16 +20,19 @@ namespace osu.Game.Rulesets.Osu.Edit
     {
         private readonly SelectionRotationHandler rotationHandler;
 
-        private readonly Bindable<PreciseRotationInfo> rotationInfo = new Bindable<PreciseRotationInfo>(new PreciseRotationInfo(0, RotationOrigin.PlayfieldCentre));
+        private readonly OsuGridToolboxGroup gridToolbox;
+
+        private readonly Bindable<PreciseRotationInfo> rotationInfo = new Bindable<PreciseRotationInfo>(new PreciseRotationInfo(0, RotationOrigin.GridCentre));
 
         private SliderWithTextBoxInput<float> angleInput = null!;
         private EditorRadioButtonCollection rotationOrigin = null!;
 
         private RadioButton selectionCentreButton = null!;
 
-        public PreciseRotationPopover(SelectionRotationHandler rotationHandler)
+        public PreciseRotationPopover(SelectionRotationHandler rotationHandler, OsuGridToolboxGroup gridToolbox)
         {
             this.rotationHandler = rotationHandler;
+            this.gridToolbox = gridToolbox;
 
             AllowableAnchors = new[] { Anchor.CentreLeft, Anchor.CentreRight };
         }
@@ -58,6 +62,9 @@ namespace osu.Game.Rulesets.Osu.Edit
                         RelativeSizeAxes = Axes.X,
                         Items = new[]
                         {
+                            new RadioButton("Grid centre",
+                                () => rotationInfo.Value = rotationInfo.Value with { Origin = RotationOrigin.GridCentre },
+                                () => new SpriteIcon { Icon = FontAwesome.Regular.PlusSquare }),
                             new RadioButton("Playfield centre",
                                 () => rotationInfo.Value = rotationInfo.Value with { Origin = RotationOrigin.PlayfieldCentre },
                                 () => new SpriteIcon { Icon = FontAwesome.Regular.Square }),
@@ -93,10 +100,19 @@ namespace osu.Game.Rulesets.Osu.Edit
 
             rotationInfo.BindValueChanged(rotation =>
             {
-                rotationHandler.Update(rotation.NewValue.Degrees, rotation.NewValue.Origin == RotationOrigin.PlayfieldCentre ? OsuPlayfield.BASE_SIZE / 2 : null);
+                rotationHandler.Update(rotation.NewValue.Degrees, getOriginPosition(rotation.NewValue));
             });
         }
 
+        private Vector2? getOriginPosition(PreciseRotationInfo rotation) =>
+            rotation.Origin switch
+            {
+                RotationOrigin.GridCentre => gridToolbox.StartPosition.Value,
+                RotationOrigin.PlayfieldCentre => OsuPlayfield.BASE_SIZE / 2,
+                RotationOrigin.SelectionCentre => null,
+                _ => throw new ArgumentOutOfRangeException(nameof(rotation))
+            };
+
         protected override void PopIn()
         {
             base.PopIn();
@@ -114,6 +130,7 @@ namespace osu.Game.Rulesets.Osu.Edit
 
     public enum RotationOrigin
     {
+        GridCentre,
         PlayfieldCentre,
         SelectionCentre
     }

osu.Game.Rulesets.Osu/Edit/PreciseScalePopover.cs

@@ -10,7 +10,10 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Graphics.UserInterfaceV2;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.UI;
+using osu.Game.Screens.Edit;
 using osu.Game.Screens.Edit.Components.RadioButtons;
 using osuTK;
 
@@ -20,28 +23,36 @@ namespace osu.Game.Rulesets.Osu.Edit
     {
         private readonly OsuSelectionScaleHandler scaleHandler;
 
-        private readonly Bindable<PreciseScaleInfo> scaleInfo = new Bindable<PreciseScaleInfo>(new PreciseScaleInfo(1, ScaleOrigin.PlayfieldCentre, true, true));
+        private readonly OsuGridToolboxGroup gridToolbox;
+
+        private readonly Bindable<PreciseScaleInfo> scaleInfo = new Bindable<PreciseScaleInfo>(new PreciseScaleInfo(1, ScaleOrigin.GridCentre, true, true));
 
         private SliderWithTextBoxInput<float> scaleInput = null!;
         private BindableNumber<float> scaleInputBindable = null!;
         private EditorRadioButtonCollection scaleOrigin = null!;
 
+        private RadioButton gridCentreButton = null!;
         private RadioButton playfieldCentreButton = null!;
         private RadioButton selectionCentreButton = null!;
 
         private OsuCheckbox xCheckBox = null!;
         private OsuCheckbox yCheckBox = null!;
 
-        public PreciseScalePopover(OsuSelectionScaleHandler scaleHandler)
+        private BindableList<HitObject> selectedItems { get; } = new BindableList<HitObject>();
+
+        public PreciseScalePopover(OsuSelectionScaleHandler scaleHandler, OsuGridToolboxGroup gridToolbox)
         {
             this.scaleHandler = scaleHandler;
+            this.gridToolbox = gridToolbox;
 
             AllowableAnchors = new[] { Anchor.CentreLeft, Anchor.CentreRight };
         }
 
         [BackgroundDependencyLoader]
-        private void load()
+        private void load(EditorBeatmap editorBeatmap)
         {
+            selectedItems.BindTo(editorBeatmap.SelectedHitObjects);
+
             Child = new FillFlowContainer
             {
                 Width = 220,
@@ -66,6 +77,9 @@ namespace osu.Game.Rulesets.Osu.Edit
                         RelativeSizeAxes = Axes.X,
                         Items = new[]
                         {
+                            gridCentreButton = new RadioButton("Grid centre",
+                                () => setOrigin(ScaleOrigin.GridCentre),
+                                () => new SpriteIcon { Icon = FontAwesome.Regular.PlusSquare }),
                             playfieldCentreButton = new RadioButton("Playfield centre",
                                 () => setOrigin(ScaleOrigin.PlayfieldCentre),
                                 () => new SpriteIcon { Icon = FontAwesome.Regular.Square }),
@@ -97,6 +111,10 @@ namespace osu.Game.Rulesets.Osu.Edit
                     },
                 }
             };
+            gridCentreButton.Selected.DisabledChanged += isDisabled =>
+            {
+                gridCentreButton.TooltipText = isDisabled ? "The current selection cannot be scaled relative to grid centre." : string.Empty;
+            };
             playfieldCentreButton.Selected.DisabledChanged += isDisabled =>
             {
                 playfieldCentreButton.TooltipText = isDisabled ? "The current selection cannot be scaled relative to playfield centre." : string.Empty;
@@ -123,19 +141,20 @@ namespace osu.Game.Rulesets.Osu.Edit
 
             selectionCentreButton.Selected.Disabled = !(scaleHandler.CanScaleX.Value || scaleHandler.CanScaleY.Value);
             playfieldCentreButton.Selected.Disabled = scaleHandler.IsScalingSlider.Value && !selectionCentreButton.Selected.Disabled;
+            gridCentreButton.Selected.Disabled = playfieldCentreButton.Selected.Disabled;
 
             scaleOrigin.Items.First(b => !b.Selected.Disabled).Select();
 
             scaleInfo.BindValueChanged(scale =>
             {
-                var newScale = new Vector2(scale.NewValue.XAxis ? scale.NewValue.Scale : 1, scale.NewValue.YAxis ? scale.NewValue.Scale : 1);
+                var newScale = new Vector2(scale.NewValue.Scale, scale.NewValue.Scale);
-                scaleHandler.Update(newScale, getOriginPosition(scale.NewValue));
+                scaleHandler.Update(newScale, getOriginPosition(scale.NewValue), getAdjustAxis(scale.NewValue), getRotation(scale.NewValue));
             });
         }
 
         private void updateAxisCheckBoxesEnabled()
         {
-            if (scaleInfo.Value.Origin == ScaleOrigin.PlayfieldCentre)
+            if (scaleInfo.Value.Origin != ScaleOrigin.SelectionCentre)
             {
                 toggleAxisAvailable(xCheckBox.Current, true);
                 toggleAxisAvailable(yCheckBox.Current, true);
@@ -162,7 +181,7 @@ namespace osu.Game.Rulesets.Osu.Edit
                 return;
 
             const float max_scale = 10;
-            var scale = scaleHandler.ClampScaleToPlayfieldBounds(new Vector2(max_scale), getOriginPosition(scaleInfo.Value));
+            var scale = scaleHandler.ClampScaleToPlayfieldBounds(new Vector2(max_scale), getOriginPosition(scaleInfo.Value), getAdjustAxis(scaleInfo.Value), getRotation(scaleInfo.Value));
 
             if (!scaleInfo.Value.XAxis)
                 scale.X = max_scale;
@@ -179,7 +198,30 @@ namespace osu.Game.Rulesets.Osu.Edit
             updateAxisCheckBoxesEnabled();
         }
 
-        private Vector2? getOriginPosition(PreciseScaleInfo scale) => scale.Origin == ScaleOrigin.PlayfieldCentre ? OsuPlayfield.BASE_SIZE / 2 : null;
+        private Vector2? getOriginPosition(PreciseScaleInfo scale)
+        {
+            switch (scale.Origin)
+            {
+                case ScaleOrigin.GridCentre:
+                    return gridToolbox.StartPosition.Value;
+
+                case ScaleOrigin.PlayfieldCentre:
+                    return OsuPlayfield.BASE_SIZE / 2;
+
+                case ScaleOrigin.SelectionCentre:
+                    if (selectedItems.Count == 1 && selectedItems.First() is Slider slider)
+                        return slider.Position;
+
+                    return null;
+
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(scale));
+            }
+        }
+
+        private Axes getAdjustAxis(PreciseScaleInfo scale) => scale.XAxis ? scale.YAxis ? Axes.Both : Axes.X : Axes.Y;
+
+        private float getRotation(PreciseScaleInfo scale) => scale.Origin == ScaleOrigin.GridCentre ? gridToolbox.GridLinesRotation.Value : 0;
 
         private void setAxis(bool x, bool y)
         {
@@ -204,6 +246,7 @@ namespace osu.Game.Rulesets.Osu.Edit
 
     public enum ScaleOrigin
     {
+        GridCentre,
         PlayfieldCentre,
         SelectionCentre
     }

osu.Game.Rulesets.Osu/Edit/Setup/OsuDifficultySection.cs

@@ -16,13 +16,13 @@ namespace osu.Game.Rulesets.Osu.Edit.Setup
 {
     public partial class OsuDifficultySection : SetupSection
     {
-        private LabelledSliderBar<float> circleSizeSlider { get; set; } = null!;
+        private FormSliderBar<float> circleSizeSlider { get; set; } = null!;
-        private LabelledSliderBar<float> healthDrainSlider { get; set; } = null!;
+        private FormSliderBar<float> healthDrainSlider { get; set; } = null!;
-        private LabelledSliderBar<float> approachRateSlider { get; set; } = null!;
+        private FormSliderBar<float> approachRateSlider { get; set; } = null!;
-        private LabelledSliderBar<float> overallDifficultySlider { get; set; } = null!;
+        private FormSliderBar<float> overallDifficultySlider { get; set; } = null!;
-        private LabelledSliderBar<double> baseVelocitySlider { get; set; } = null!;
+        private FormSliderBar<double> baseVelocitySlider { get; set; } = null!;
-        private LabelledSliderBar<double> tickRateSlider { get; set; } = null!;
+        private FormSliderBar<double> tickRateSlider { get; set; } = null!;
-        private LabelledSliderBar<float> stackLeniency { get; set; } = null!;
+        private FormSliderBar<float> stackLeniency { get; set; } = null!;
 
         public override LocalisableString Title => EditorSetupStrings.DifficultyHeader;
 
@@ -31,103 +31,110 @@ namespace osu.Game.Rulesets.Osu.Edit.Setup
         {
             Children = new Drawable[]
             {
-                circleSizeSlider = new LabelledSliderBar<float>
+                circleSizeSlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsCs,
+                    Caption = BeatmapsetsStrings.ShowStatsCs,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.CircleSizeDescription,
-                    Description = EditorSetupStrings.CircleSizeDescription,
                     Current = new BindableFloat(Beatmap.Difficulty.CircleSize)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 0.1f,
-                    }
                     },
-                healthDrainSlider = new LabelledSliderBar<float>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                healthDrainSlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsDrain,
+                    Caption = BeatmapsetsStrings.ShowStatsDrain,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.DrainRateDescription,
-                    Description = EditorSetupStrings.DrainRateDescription,
                     Current = new BindableFloat(Beatmap.Difficulty.DrainRate)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 0.1f,
-                    }
                     },
-                approachRateSlider = new LabelledSliderBar<float>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                approachRateSlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsAr,
+                    Caption = BeatmapsetsStrings.ShowStatsAr,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.ApproachRateDescription,
-                    Description = EditorSetupStrings.ApproachRateDescription,
                     Current = new BindableFloat(Beatmap.Difficulty.ApproachRate)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 0.1f,
-                    }
                     },
-                overallDifficultySlider = new LabelledSliderBar<float>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                overallDifficultySlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsAccuracy,
+                    Caption = BeatmapsetsStrings.ShowStatsAccuracy,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.OverallDifficultyDescription,
-                    Description = EditorSetupStrings.OverallDifficultyDescription,
                     Current = new BindableFloat(Beatmap.Difficulty.OverallDifficulty)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 0.1f,
-                    }
                     },
-                baseVelocitySlider = new LabelledSliderBar<double>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                baseVelocitySlider = new FormSliderBar<double>
                 {
-                    Label = EditorSetupStrings.BaseVelocity,
+                    Caption = EditorSetupStrings.BaseVelocity,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.BaseVelocityDescription,
-                    Description = EditorSetupStrings.BaseVelocityDescription,
                     Current = new BindableDouble(Beatmap.Difficulty.SliderMultiplier)
                     {
                         Default = 1.4,
                         MinValue = 0.4,
                         MaxValue = 3.6,
                         Precision = 0.01f,
-                    }
                     },
-                tickRateSlider = new LabelledSliderBar<double>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                tickRateSlider = new FormSliderBar<double>
                 {
-                    Label = EditorSetupStrings.TickRate,
+                    Caption = EditorSetupStrings.TickRate,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.TickRateDescription,
-                    Description = EditorSetupStrings.TickRateDescription,
                     Current = new BindableDouble(Beatmap.Difficulty.SliderTickRate)
                     {
                         Default = 1,
                         MinValue = 1,
                         MaxValue = 4,
                         Precision = 1,
-                    }
                     },
-                stackLeniency = new LabelledSliderBar<float>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                stackLeniency = new FormSliderBar<float>
                 {
-                    Label = "Stack Leniency",
+                    Caption = "Stack Leniency",
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = "In play mode, osu! automatically stacks notes which occur at the same location. Increasing this value means it is more likely to snap notes of further time-distance.",
-                    Description = "In play mode, osu! automatically stacks notes which occur at the same location. Increasing this value means it is more likely to snap notes of further time-distance.",
                     Current = new BindableFloat(Beatmap.BeatmapInfo.StackLeniency)
                     {
                         Default = 0.7f,
                         MinValue = 0,
                         MaxValue = 1,
                         Precision = 0.1f
-                    }
+                    },
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
                 },
             };
 
-            foreach (var item in Children.OfType<LabelledSliderBar<float>>())
+            foreach (var item in Children.OfType<FormSliderBar<float>>())
                 item.Current.ValueChanged += _ => updateValues();
 
-            foreach (var item in Children.OfType<LabelledSliderBar<double>>())
+            foreach (var item in Children.OfType<FormSliderBar<double>>())
                 item.Current.ValueChanged += _ => updateValues();
         }
 

osu.Game.Rulesets.Osu/Edit/SliderCompositionTool.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Osu.Objects;
 
 namespace osu.Game.Rulesets.Osu.Edit
 {
-    public class SliderCompositionTool : HitObjectCompositionTool
+    public class SliderCompositionTool : CompositionTool
     {
         public SliderCompositionTool()
             : base(nameof(Slider))
@@ -26,6 +26,6 @@ namespace osu.Game.Rulesets.Osu.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new SliderPlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new SliderPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Osu/Edit/SpinnerCompositionTool.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Osu.Objects;
 
 namespace osu.Game.Rulesets.Osu.Edit
 {
-    public class SpinnerCompositionTool : HitObjectCompositionTool
+    public class SpinnerCompositionTool : CompositionTool
     {
         public SpinnerCompositionTool()
             : base(nameof(Spinner))
@@ -19,6 +19,6 @@ namespace osu.Game.Rulesets.Osu.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Spinners);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new SpinnerPlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new SpinnerPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Osu/Edit/TransformToolboxGroup.cs

@@ -27,6 +27,8 @@ namespace osu.Game.Rulesets.Osu.Edit
         public SelectionRotationHandler RotationHandler { get; init; } = null!;
         public OsuSelectionScaleHandler ScaleHandler { get; init; } = null!;
 
+        public OsuGridToolboxGroup GridToolbox { get; init; } = null!;
+
         public TransformToolboxGroup()
             : base("transform")
         {
@@ -44,10 +46,10 @@ namespace osu.Game.Rulesets.Osu.Edit
                 {
                     rotateButton = new EditorToolButton("Rotate",
                         () => new SpriteIcon { Icon = FontAwesome.Solid.Undo },
-                        () => new PreciseRotationPopover(RotationHandler)),
+                        () => new PreciseRotationPopover(RotationHandler, GridToolbox)),
                     scaleButton = new EditorToolButton("Scale",
                         () => new SpriteIcon { Icon = FontAwesome.Solid.ArrowsAlt },
-                        () => new PreciseScalePopover(ScaleHandler))
+                        () => new PreciseScalePopover(ScaleHandler, GridToolbox))
                 }
             };
         }

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableOsuHitObject.cs

@@ -91,19 +91,34 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                     drawableObjectPiece.ApplyCustomUpdateState -= applyDimToDrawableHitObject;
                     drawableObjectPiece.ApplyCustomUpdateState += applyDimToDrawableHitObject;
                 }
-                else
+
+                // but at the end apply the transforms now regardless of whether this is a DHO or not.
+                // the above is just to ensure they don't get overwritten later.
                 applyDim(piece);
             }
+        }
 
-            void applyDim(Drawable piece)
+        protected override void ClearNestedHitObjects()
+        {
+            base.ClearNestedHitObjects();
+
+            // any dimmable pieces that are DHOs will be pooled separately.
+            // `applyDimToDrawableHitObject` is a closure that implicitly captures `this`,
+            // and because of separate pooling of parent and child objects, there is no guarantee that the pieces will be associated with `this` again on re-use.
+            // therefore, clean up the subscription here to avoid crosstalk.
+            // not doing so can result in the callback attempting to read things from `this` when it is in a completely bogus state (not in use or similar).
+            foreach (var piece in DimmablePieces.OfType<DrawableHitObject>())
+                piece.ApplyCustomUpdateState -= applyDimToDrawableHitObject;
+        }
+
+        private void applyDim(Drawable piece)
         {
             piece.FadeColour(new Color4(195, 195, 195, 255));
             using (piece.BeginDelayedSequence(InitialLifetimeOffset - OsuHitWindows.MISS_WINDOW))
                 piece.FadeColour(Color4.White, 100);
         }
 
-            void applyDimToDrawableHitObject(DrawableHitObject dho, ArmedState _) => applyDim(dho);
+        private void applyDimToDrawableHitObject(DrawableHitObject dho, ArmedState _) => applyDim(dho);
-        }
 
         protected sealed override double InitialLifetimeOffset => HitObject.TimePreempt;
 

osu.Game.Rulesets.Osu/Objects/Slider.cs

@@ -204,6 +204,7 @@ namespace osu.Game.Rulesets.Osu.Objects
                             SpanStartTime = e.SpanStartTime,
                             StartTime = e.Time,
                             Position = Position + Path.PositionAt(e.PathProgress),
+                            PathProgress = e.PathProgress,
                             StackHeight = StackHeight,
                         });
                         break;
@@ -236,6 +237,7 @@ namespace osu.Game.Rulesets.Osu.Objects
                             StartTime = StartTime + (e.SpanIndex + 1) * SpanDuration,
                             Position = Position + Path.PositionAt(e.PathProgress),
                             StackHeight = StackHeight,
+                            PathProgress = e.PathProgress,
                         });
                         break;
                 }
@@ -248,14 +250,27 @@ namespace osu.Game.Rulesets.Osu.Objects
         {
             endPositionCache.Invalidate();
 
-            if (HeadCircle != null)
+            foreach (var nested in NestedHitObjects)
-                HeadCircle.Position = Position;
+            {
+                switch (nested)
+                {
+                    case SliderHeadCircle headCircle:
+                        headCircle.Position = Position;
+                        break;
 
-            if (TailCircle != null)
+                    case SliderTailCircle tailCircle:
-                TailCircle.Position = EndPosition;
+                        tailCircle.Position = EndPosition;
+                        break;
 
-            if (LastRepeat != null)
+                    case SliderRepeat repeat:
-                LastRepeat.Position = RepeatCount % 2 == 0 ? Position : Position + Path.PositionAt(1);
+                        repeat.Position = Position + Path.PositionAt(repeat.PathProgress);
+                        break;
+
+                    case SliderTick tick:
+                        tick.Position = Position + Path.PositionAt(tick.PathProgress);
+                        break;
+                }
+            }
         }
 
         protected void UpdateNestedSamples()

osu.Game.Rulesets.Osu/Objects/SliderRepeat.cs

@@ -5,6 +5,8 @@ namespace osu.Game.Rulesets.Osu.Objects
 {
     public class SliderRepeat : SliderEndCircle
     {
+        public double PathProgress { get; set; }
+
         public SliderRepeat(Slider slider)
             : base(slider)
         {

osu.Game.Rulesets.Osu/Objects/SliderTick.cs

@@ -13,6 +13,7 @@ namespace osu.Game.Rulesets.Osu.Objects
     {
         public int SpanIndex { get; set; }
         public double SpanStartTime { get; set; }
+        public double PathProgress { get; set; }
 
         protected override void ApplyDefaultsToSelf(ControlPointInfo controlPointInfo, IBeatmapDifficultyInfo difficulty)
         {

osu.Game.Rulesets.Osu/OsuRuleset.cs

@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Input.Bindings;
 using osu.Framework.Localisation;
@@ -39,6 +40,7 @@ using osu.Game.Scoring;
 using osu.Game.Screens.Edit.Setup;
 using osu.Game.Screens.Ranking.Statistics;
 using osu.Game.Skinning;
+using osuTK;
 
 namespace osu.Game.Rulesets.Osu
 {
@@ -336,10 +338,28 @@ namespace osu.Game.Rulesets.Osu
             };
         }
 
-        public override IEnumerable<SetupSection> CreateEditorSetupSections() =>
+        public override IEnumerable<Drawable> CreateEditorSetupSections() =>
         [
+            new MetadataSection(),
             new OsuDifficultySection(),
-            new ColoursSection(),
+            new FillFlowContainer
+            {
+                AutoSizeAxes = Axes.Y,
+                Direction = FillDirection.Vertical,
+                Spacing = new Vector2(SetupScreen.SPACING),
+                Children = new Drawable[]
+                {
+                    new ResourcesSection
+                    {
+                        RelativeSizeAxes = Axes.X,
+                    },
+                    new ColoursSection
+                    {
+                        RelativeSizeAxes = Axes.X,
+                    }
+                }
+            },
+            new DesignSection(),
         ];
 
         /// <seealso cref="OsuHitObject.ApplyDefaultsToSelf"/>

osu.Game.Rulesets.Osu/Utils/OsuHitObjectGenerationUtils_Reposition.cs

@@ -232,8 +232,6 @@ namespace osu.Game.Rulesets.Osu.Utils
             slider.Position = workingObject.PositionModified = new Vector2(newX, newY);
             workingObject.EndPositionModified = slider.EndPosition;
 
-            shiftNestedObjects(slider, workingObject.PositionModified - workingObject.PositionOriginal);
-
             return workingObject.PositionModified - previousPosition;
         }
 
@@ -307,22 +305,6 @@ namespace osu.Game.Rulesets.Osu.Utils
             return new RectangleF(left, top, right - left, bottom - top);
         }
 
-        /// <summary>
-        /// Shifts all nested <see cref="SliderTick"/>s and <see cref="SliderRepeat"/>s by the specified shift.
-        /// </summary>
-        /// <param name="slider"><see cref="Slider"/> whose nested <see cref="SliderTick"/>s and <see cref="SliderRepeat"/>s should be shifted</param>
-        /// <param name="shift">The <see cref="Vector2"/> the <see cref="Slider"/>'s nested <see cref="SliderTick"/>s and <see cref="SliderRepeat"/>s should be shifted by</param>
-        private static void shiftNestedObjects(Slider slider, Vector2 shift)
-        {
-            foreach (var hitObject in slider.NestedHitObjects.Where(o => o is SliderTick || o is SliderRepeat))
-            {
-                if (!(hitObject is OsuHitObject osuHitObject))
-                    continue;
-
-                osuHitObject.Position += shift;
-            }
-        }
-
         /// <summary>
         /// Clamp a position to playfield, keeping a specified distance from the edges.
         /// </summary>
@@ -431,7 +413,6 @@ namespace osu.Game.Rulesets.Osu.Utils
         private class WorkingObject
         {
             public float RotationOriginal { get; }
-            public Vector2 PositionOriginal { get; }
             public Vector2 PositionModified { get; set; }
             public Vector2 EndPositionModified { get; set; }
 
@@ -442,7 +423,7 @@ namespace osu.Game.Rulesets.Osu.Utils
             {
                 PositionInfo = positionInfo;
                 RotationOriginal = HitObject is Slider slider ? getSliderRotation(slider) : 0;
-                PositionModified = PositionOriginal = HitObject.Position;
+                PositionModified = HitObject.Position;
                 EndPositionModified = HitObject.EndPosition;
             }
         }

osu.Game.Rulesets.Taiko.Tests/VolumeAwareHitSampleInfoTest.cs

@@ -0,0 +1,27 @@
+// 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 NUnit.Framework;
+using osu.Game.Audio;
+using osu.Game.Rulesets.Taiko.Skinning.Argon;
+
+namespace osu.Game.Rulesets.Taiko.Tests
+{
+    [TestFixture]
+    public class VolumeAwareHitSampleInfoTest
+    {
+        [Test]
+        public void TestVolumeAwareHitSampleInfoIsNotEqualToItsUnderlyingSample(
+            [Values(HitSampleInfo.HIT_NORMAL, HitSampleInfo.HIT_CLAP)]
+            string sample,
+            [Values(HitSampleInfo.BANK_NORMAL, HitSampleInfo.BANK_SOFT)]
+            string bank,
+            [Values(30, 70, 100)] int volume)
+        {
+            var underlyingSample = new HitSampleInfo(sample, bank, volume: volume);
+            var volumeAwareSample = new VolumeAwareHitSampleInfo(underlyingSample);
+
+            Assert.That(underlyingSample, Is.Not.EqualTo(volumeAwareSample));
+        }
+    }
+}

osu.Game.Rulesets.Taiko/Difficulty/TaikoDifficultyAttributes.cs

@@ -43,6 +43,15 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
         [JsonProperty("great_hit_window")]
         public double GreatHitWindow { get; set; }
 
+        /// <summary>
+        /// The perceived hit window for an OK hit inclusive of rate-adjusting mods (DT/HT/etc).
+        /// </summary>
+        /// <remarks>
+        /// Rate-adjusting mods don't directly affect the hit window, but have a perceived effect as a result of adjusting audio timing.
+        /// </remarks>
+        [JsonProperty("ok_hit_window")]
+        public double OkHitWindow { get; set; }
+
         public override IEnumerable<(int attributeId, object value)> ToDatabaseAttributes()
         {
             foreach (var v in base.ToDatabaseAttributes())
@@ -50,6 +59,7 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
 
             yield return (ATTRIB_ID_DIFFICULTY, StarRating);
             yield return (ATTRIB_ID_GREAT_HIT_WINDOW, GreatHitWindow);
+            yield return (ATTRIB_ID_OK_HIT_WINDOW, OkHitWindow);
         }
 
         public override void FromDatabaseAttributes(IReadOnlyDictionary<int, double> values, IBeatmapOnlineInfo onlineInfo)
@@ -58,6 +68,7 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
 
             StarRating = values[ATTRIB_ID_DIFFICULTY];
             GreatHitWindow = values[ATTRIB_ID_GREAT_HIT_WINDOW];
+            OkHitWindow = values[ATTRIB_ID_OK_HIT_WINDOW];
         }
     }
 }

osu.Game.Rulesets.Taiko/Difficulty/TaikoDifficultyCalculator.cs

@@ -14,7 +14,6 @@ using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing;
 using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing.Colour;
 using osu.Game.Rulesets.Taiko.Difficulty.Skills;
 using osu.Game.Rulesets.Taiko.Mods;
-using osu.Game.Rulesets.Taiko.Objects;
 using osu.Game.Rulesets.Taiko.Scoring;
 
 namespace osu.Game.Rulesets.Taiko.Difficulty
@@ -100,7 +99,8 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
                 ColourDifficulty = colourRating,
                 PeakDifficulty = combinedRating,
                 GreatHitWindow = hitWindows.WindowFor(HitResult.Great) / clockRate,
-                MaxCombo = beatmap.HitObjects.Count(h => h is Hit),
+                OkHitWindow = hitWindows.WindowFor(HitResult.Ok) / clockRate,
+                MaxCombo = beatmap.GetMaxCombo(),
             };
 
             return attributes;

osu.Game.Rulesets.Taiko/Difficulty/TaikoPerformanceAttributes.cs

@@ -18,6 +18,9 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
         [JsonProperty("effective_miss_count")]
         public double EffectiveMissCount { get; set; }
 
+        [JsonProperty("estimated_unstable_rate")]
+        public double? EstimatedUnstableRate { get; set; }
+
         public override IEnumerable<PerformanceDisplayAttribute> GetAttributesForDisplay()
         {
             foreach (var attribute in base.GetAttributesForDisplay())

osu.Game.Rulesets.Taiko/Difficulty/TaikoPerformanceCalculator.cs

@@ -9,6 +9,7 @@ using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.Taiko.Objects;
 using osu.Game.Scoring;
+using osu.Game.Utils;
 
 namespace osu.Game.Rulesets.Taiko.Difficulty
 {
@@ -18,7 +19,7 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
         private int countOk;
         private int countMeh;
         private int countMiss;
-        private double accuracy;
+        private double? estimatedUnstableRate;
 
         private double effectiveMissCount;
 
@@ -35,7 +36,7 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
             countOk = score.Statistics.GetValueOrDefault(HitResult.Ok);
             countMeh = score.Statistics.GetValueOrDefault(HitResult.Meh);
             countMiss = score.Statistics.GetValueOrDefault(HitResult.Miss);
-            accuracy = customAccuracy;
+            estimatedUnstableRate = computeDeviationUpperBound(taikoAttributes) * 10;
 
             // The effectiveMissCount is calculated by gaining a ratio for totalSuccessfulHits and increasing the miss penalty for shorter object counts lower than 1000.
             if (totalSuccessfulHits > 0)
@@ -65,6 +66,7 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
                 Difficulty = difficultyValue,
                 Accuracy = accuracyValue,
                 EffectiveMissCount = effectiveMissCount,
+                EstimatedUnstableRate = estimatedUnstableRate,
                 Total = totalValue
             };
         }
@@ -85,35 +87,94 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
                 difficultyValue *= 1.025;
 
             if (score.Mods.Any(m => m is ModHardRock))
-                difficultyValue *= 1.050;
+                difficultyValue *= 1.10;
 
             if (score.Mods.Any(m => m is ModFlashlight<TaikoHitObject>))
                 difficultyValue *= 1.050 * lengthBonus;
 
-            return difficultyValue * Math.Pow(accuracy, 2.0);
+            if (estimatedUnstableRate == null)
+                return 0;
+
+            return difficultyValue * Math.Pow(SpecialFunctions.Erf(400 / (Math.Sqrt(2) * estimatedUnstableRate.Value)), 2.0);
         }
 
         private double computeAccuracyValue(ScoreInfo score, TaikoDifficultyAttributes attributes, bool isConvert)
         {
-            if (attributes.GreatHitWindow <= 0)
+            if (attributes.GreatHitWindow <= 0 || estimatedUnstableRate == null)
                 return 0;
 
-            double accuracyValue = Math.Pow(60.0 / attributes.GreatHitWindow, 1.1) * Math.Pow(accuracy, 8.0) * Math.Pow(attributes.StarRating, 0.4) * 27.0;
+            double accuracyValue = Math.Pow(70 / estimatedUnstableRate.Value, 1.1) * Math.Pow(attributes.StarRating, 0.4) * 100.0;
 
             double lengthBonus = Math.Min(1.15, Math.Pow(totalHits / 1500.0, 0.3));
-            accuracyValue *= lengthBonus;
 
             // Slight HDFL Bonus for accuracy. A clamp is used to prevent against negative values.
             if (score.Mods.Any(m => m is ModFlashlight<TaikoHitObject>) && score.Mods.Any(m => m is ModHidden) && !isConvert)
-                accuracyValue *= Math.Max(1.0, 1.1 * lengthBonus);
+                accuracyValue *= Math.Max(1.0, 1.05 * lengthBonus);
 
             return accuracyValue;
         }
 
+        /// <summary>
+        /// Computes an upper bound on the player's tap deviation based on the OD, number of circles and sliders,
+        /// and the hit judgements, assuming the player's mean hit error is 0. The estimation is consistent in that
+        /// two SS scores on the same map with the same settings will always return the same deviation.
+        /// </summary>
+        private double? computeDeviationUpperBound(TaikoDifficultyAttributes attributes)
+        {
+            if (totalSuccessfulHits == 0 || attributes.GreatHitWindow <= 0)
+                return null;
+
+            double h300 = attributes.GreatHitWindow;
+            double h100 = attributes.OkHitWindow;
+
+            const double z = 2.32634787404; // 99% critical value for the normal distribution (one-tailed).
+
+            // The upper bound on deviation, calculated with the ratio of 300s to objects, and the great hit window.
+            double? calcDeviationGreatWindow()
+            {
+                if (countGreat == 0) return null;
+
+                double n = totalHits;
+
+                // Proportion of greats hit.
+                double p = countGreat / n;
+
+                // We can be 99% confident that p is at least this value.
+                double pLowerBound = (n * p + z * z / 2) / (n + z * z) - z / (n + z * z) * Math.Sqrt(n * p * (1 - p) + z * z / 4);
+
+                // We can be 99% confident that the deviation is not higher than:
+                return h300 / (Math.Sqrt(2) * SpecialFunctions.ErfInv(pLowerBound));
+            }
+
+            // The upper bound on deviation, calculated with the ratio of 300s + 100s to objects, and the good hit window.
+            // This will return a lower value than the first method when the number of 100s is high, but the miss count is low.
+            double? calcDeviationGoodWindow()
+            {
+                if (totalSuccessfulHits == 0) return null;
+
+                double n = totalHits;
+
+                // Proportion of greats + goods hit.
+                double p = totalSuccessfulHits / n;
+
+                // We can be 99% confident that p is at least this value.
+                double pLowerBound = (n * p + z * z / 2) / (n + z * z) - z / (n + z * z) * Math.Sqrt(n * p * (1 - p) + z * z / 4);
+
+                // We can be 99% confident that the deviation is not higher than:
+                return h100 / (Math.Sqrt(2) * SpecialFunctions.ErfInv(pLowerBound));
+            }
+
+            double? deviationGreatWindow = calcDeviationGreatWindow();
+            double? deviationGoodWindow = calcDeviationGoodWindow();
+
+            if (deviationGreatWindow is null)
+                return deviationGoodWindow;
+
+            return Math.Min(deviationGreatWindow.Value, deviationGoodWindow!.Value);
+        }
+
         private int totalHits => countGreat + countOk + countMeh + countMiss;
 
         private int totalSuccessfulHits => countGreat + countOk + countMeh;
-
-        private double customAccuracy => totalHits > 0 ? (countGreat * 300 + countOk * 150) / (totalHits * 300.0) : 0;
     }
 }

osu.Game.Rulesets.Taiko/Edit/Blueprints/HitPlacementBlueprint.cs

@@ -10,7 +10,7 @@ using osuTK.Input;
 
 namespace osu.Game.Rulesets.Taiko.Edit.Blueprints
 {
-    public partial class HitPlacementBlueprint : PlacementBlueprint
+    public partial class HitPlacementBlueprint : HitObjectPlacementBlueprint
     {
         private readonly HitPiece piece;
 

osu.Game.Rulesets.Taiko/Edit/Blueprints/TaikoSpanPlacementBlueprint.cs

@@ -17,7 +17,7 @@ using osuTK.Input;
 
 namespace osu.Game.Rulesets.Taiko.Edit.Blueprints
 {
-    public partial class TaikoSpanPlacementBlueprint : PlacementBlueprint
+    public partial class TaikoSpanPlacementBlueprint : HitObjectPlacementBlueprint
     {
         private readonly HitPiece headPiece;
         private readonly HitPiece tailPiece;

osu.Game.Rulesets.Taiko/Edit/DrumRollCompositionTool.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Taiko.Objects;
 
 namespace osu.Game.Rulesets.Taiko.Edit
 {
-    public class DrumRollCompositionTool : HitObjectCompositionTool
+    public class DrumRollCompositionTool : CompositionTool
     {
         public DrumRollCompositionTool()
             : base(nameof(DrumRoll))
@@ -19,6 +19,6 @@ namespace osu.Game.Rulesets.Taiko.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new DrumRollPlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new DrumRollPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Taiko/Edit/HitCompositionTool.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Taiko.Objects;
 
 namespace osu.Game.Rulesets.Taiko.Edit
 {
-    public class HitCompositionTool : HitObjectCompositionTool
+    public class HitCompositionTool : CompositionTool
     {
         public HitCompositionTool()
             : base(nameof(Hit))
@@ -19,6 +19,6 @@ namespace osu.Game.Rulesets.Taiko.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new HitPlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new HitPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Taiko/Edit/Setup/TaikoDifficultySection.cs

@@ -16,10 +16,10 @@ namespace osu.Game.Rulesets.Taiko.Edit.Setup
 {
     public partial class TaikoDifficultySection : SetupSection
     {
-        private LabelledSliderBar<float> healthDrainSlider { get; set; } = null!;
+        private FormSliderBar<float> healthDrainSlider { get; set; } = null!;
-        private LabelledSliderBar<float> overallDifficultySlider { get; set; } = null!;
+        private FormSliderBar<float> overallDifficultySlider { get; set; } = null!;
-        private LabelledSliderBar<double> baseVelocitySlider { get; set; } = null!;
+        private FormSliderBar<double> baseVelocitySlider { get; set; } = null!;
-        private LabelledSliderBar<double> tickRateSlider { get; set; } = null!;
+        private FormSliderBar<double> tickRateSlider { get; set; } = null!;
 
         public override LocalisableString Title => EditorSetupStrings.DifficultyHeader;
 
@@ -28,64 +28,68 @@ namespace osu.Game.Rulesets.Taiko.Edit.Setup
         {
             Children = new Drawable[]
             {
-                healthDrainSlider = new LabelledSliderBar<float>
+                healthDrainSlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsDrain,
+                    Caption = BeatmapsetsStrings.ShowStatsDrain,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.DrainRateDescription,
-                    Description = EditorSetupStrings.DrainRateDescription,
                     Current = new BindableFloat(Beatmap.Difficulty.DrainRate)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 0.1f,
-                    }
                     },
-                overallDifficultySlider = new LabelledSliderBar<float>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                overallDifficultySlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsAccuracy,
+                    Caption = BeatmapsetsStrings.ShowStatsAccuracy,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.OverallDifficultyDescription,
-                    Description = EditorSetupStrings.OverallDifficultyDescription,
                     Current = new BindableFloat(Beatmap.Difficulty.OverallDifficulty)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 0.1f,
-                    }
                     },
-                baseVelocitySlider = new LabelledSliderBar<double>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                baseVelocitySlider = new FormSliderBar<double>
                 {
-                    Label = EditorSetupStrings.BaseVelocity,
+                    Caption = EditorSetupStrings.BaseVelocity,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.BaseVelocityDescription,
-                    Description = EditorSetupStrings.BaseVelocityDescription,
                     Current = new BindableDouble(Beatmap.Difficulty.SliderMultiplier)
                     {
                         Default = 1.4,
                         MinValue = 0.4,
                         MaxValue = 3.6,
                         Precision = 0.01f,
-                    }
                     },
-                tickRateSlider = new LabelledSliderBar<double>
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
+                },
+                tickRateSlider = new FormSliderBar<double>
                 {
-                    Label = EditorSetupStrings.TickRate,
+                    Caption = EditorSetupStrings.TickRate,
-                    FixedLabelWidth = LABEL_WIDTH,
+                    HintText = EditorSetupStrings.TickRateDescription,
-                    Description = EditorSetupStrings.TickRateDescription,
                     Current = new BindableDouble(Beatmap.Difficulty.SliderTickRate)
                     {
                         Default = 1,
                         MinValue = 1,
                         MaxValue = 4,
                         Precision = 1,
-                    }
+                    },
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
                 },
             };
 
-            foreach (var item in Children.OfType<LabelledSliderBar<float>>())
+            foreach (var item in Children.OfType<FormSliderBar<float>>())
                 item.Current.ValueChanged += _ => updateValues();
 
-            foreach (var item in Children.OfType<LabelledSliderBar<double>>())
+            foreach (var item in Children.OfType<FormSliderBar<double>>())
                 item.Current.ValueChanged += _ => updateValues();
         }
 

osu.Game.Rulesets.Taiko/Edit/SwellCompositionTool.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Taiko.Objects;
 
 namespace osu.Game.Rulesets.Taiko.Edit
 {
-    public class SwellCompositionTool : HitObjectCompositionTool
+    public class SwellCompositionTool : CompositionTool
     {
         public SwellCompositionTool()
             : base(nameof(Swell))
@@ -19,6 +19,6 @@ namespace osu.Game.Rulesets.Taiko.Edit
 
         public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Spinners);
 
-        public override PlacementBlueprint CreatePlacementBlueprint() => new SwellPlacementBlueprint();
+        public override HitObjectPlacementBlueprint CreatePlacementBlueprint() => new SwellPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Taiko/Edit/TaikoHitObjectComposer.cs

@@ -21,7 +21,7 @@ namespace osu.Game.Rulesets.Taiko.Edit
         {
         }
 
-        protected override IReadOnlyList<HitObjectCompositionTool> CompositionTools => new HitObjectCompositionTool[]
+        protected override IReadOnlyList<CompositionTool> CompositionTools => new CompositionTool[]
         {
             new HitCompositionTool(),
             new DrumRollCompositionTool(),

osu.Game.Rulesets.Taiko/Edit/TaikoSelectionHandler.cs

@@ -6,6 +6,7 @@ using System.Linq;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Input.Bindings;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Objects;
@@ -86,10 +87,22 @@ namespace osu.Game.Rulesets.Taiko.Edit
         protected override IEnumerable<MenuItem> GetContextMenuItemsForSelection(IEnumerable<SelectionBlueprint<HitObject>> selection)
         {
             if (selection.All(s => s.Item is Hit))
-                yield return new TernaryStateToggleMenuItem("Rim") { State = { BindTarget = selectionRimState } };
+            {
+                yield return new TernaryStateToggleMenuItem("Rim")
+                {
+                    State = { BindTarget = selectionRimState },
+                    Hotkey = new Hotkey(new KeyCombination(InputKey.W), new KeyCombination(InputKey.R)),
+                };
+            }
 
             if (selection.All(s => s.Item is TaikoHitObject))
-                yield return new TernaryStateToggleMenuItem("Strong") { State = { BindTarget = selectionStrongState } };
+            {
+                yield return new TernaryStateToggleMenuItem("Strong")
+                {
+                    State = { BindTarget = selectionStrongState },
+                    Hotkey = new Hotkey(new KeyCombination(InputKey.E)),
+                };
+            }
 
             foreach (var item in base.GetContextMenuItemsForSelection(selection))
                 yield return item;

osu.Game.Rulesets.Taiko/Skinning/Argon/VolumeAwareHitSampleInfo.cs

@@ -1,6 +1,7 @@
 // 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 System.Collections.Generic;
 using osu.Game.Audio;
 
@@ -48,5 +49,24 @@ namespace osu.Game.Rulesets.Taiko.Skinning.Argon
                     return originalBank;
             }
         }
+
+        public override bool Equals(HitSampleInfo? other) => other is VolumeAwareHitSampleInfo && base.Equals(other);
+
+        /// <remarks>
+        /// <para>
+        /// This override attempts to match the <see cref="Equals"/> override above, but in theory it is not strictly necessary.
+        /// Recall that <see cref="GetHashCode"/> <a href="https://learn.microsoft.com/en-us/dotnet/api/system.object.gethashcode?view=net-8.0#notes-to-inheritors">must meet the following requirements</a>:
+        /// </para>
+        /// <para>
+        /// "If two objects compare as equal, the <see cref="GetHashCode"/> method for each object must return the same value.
+        /// However, if two objects do not compare as equal, <see cref="GetHashCode"/> methods for the two objects do not have to return different values."
+        /// </para>
+        /// <para>
+        /// Making this override combine the value generated by the base <see cref="GetHashCode"/> implementation with a constant means
+        /// that <see cref="HitSampleInfo"/> and <see cref="VolumeAwareHitSampleInfo"/> instances which have the same values of their members
+        /// will not have equal hash codes, which is slightly more efficient when these objects are used as dictionary keys.
+        /// </para>
+        /// </remarks>
+        public override int GetHashCode() => HashCode.Combine(base.GetHashCode(), 1);
     }
 }

osu.Game.Rulesets.Taiko/TaikoRuleset.cs

@@ -190,9 +190,12 @@ namespace osu.Game.Rulesets.Taiko
 
         public override HitObjectComposer CreateHitObjectComposer() => new TaikoHitObjectComposer(this);
 
-        public override IEnumerable<SetupSection> CreateEditorSetupSections() =>
+        public override IEnumerable<Drawable> CreateEditorSetupSections() =>
         [
+            new MetadataSection(),
             new TaikoDifficultySection(),
+            new ResourcesSection(),
+            new DesignSection(),
         ];
 
         public override IBeatmapVerifier CreateBeatmapVerifier() => new TaikoBeatmapVerifier();

osu.Game.Tests/Editing/TestSceneHitObjectComposerDistanceSnapping.cs

@@ -112,6 +112,7 @@ namespace osu.Game.Tests.Editing
             {
                 SliderVelocityMultiplier = slider_velocity
             };
+            AddStep("add to beatmap", () => composer.EditorBeatmap.Add(referenceObject));
 
             assertSnapDistance(base_distance * slider_velocity, referenceObject, true);
             assertSnappedDistance(base_distance * slider_velocity + 10, base_distance * slider_velocity, referenceObject);
@@ -227,26 +228,65 @@ namespace osu.Game.Tests.Editing
             assertSnappedDistance(400, 400);
         }
 
+        [Test]
+        public void TestUnsnappedObject()
+        {
+            var slider = new Slider
+            {
+                StartTime = 0,
+                Path = new SliderPath
+                {
+                    ControlPoints =
+                    {
+                        new PathControlPoint(),
+                        // simulate object snapped to 1/3rds
+                        // this object's end time will be 2000 / 3 = 666.66... ms
+                        new PathControlPoint(new Vector2(200 / 3f, 0)),
+                    }
+                }
+            };
+
+            AddStep("add slider", () => composer.EditorBeatmap.Add(slider));
+            AddStep("set snap to 1/4", () => BeatDivisor.Value = 4);
+
+            // with default beat length of 1000ms and snap at 1/4, the valid snap times are 500ms, 750ms, and 1000ms
+            // with default settings, the snapped distance will be a tenth of the difference of the time delta
+
+            // (500 - 666.66...) / 10 = -16.66... = -100 / 6
+            assertSnappedDistance(0, -100 / 6f, slider);
+            assertSnappedDistance(7, -100 / 6f, slider);
+
+            // (750 - 666.66...) / 10 = 8.33... = 100 / 12
+            assertSnappedDistance(9, 100 / 12f, slider);
+            assertSnappedDistance(33, 100 / 12f, slider);
+
+            // (1000 - 666.66...) / 10 = 33.33... = 100 / 3
+            assertSnappedDistance(34, 100 / 3f, slider);
+        }
+
         [Test]
         public void TestUseCurrentSnap()
         {
+            ExpandableButton getCurrentSnapButton() => composer.ChildrenOfType<EditorToolboxGroup>().Single(g => g.Name == "snapping")
+                                                               .ChildrenOfType<ExpandableButton>().Single();
+
             AddStep("add objects to beatmap", () =>
             {
                 editorBeatmap.Add(new HitCircle { StartTime = 1000 });
                 editorBeatmap.Add(new HitCircle { Position = new Vector2(100), StartTime = 2000 });
             });
 
-            AddStep("hover use current snap button", () => InputManager.MoveMouseTo(composer.ChildrenOfType<ExpandableButton>().Single()));
+            AddStep("hover use current snap button", () => InputManager.MoveMouseTo(getCurrentSnapButton()));
-            AddUntilStep("use current snap expanded", () => composer.ChildrenOfType<ExpandableButton>().Single().Expanded.Value, () => Is.True);
+            AddUntilStep("use current snap expanded", () => getCurrentSnapButton().Expanded.Value, () => Is.True);
 
             AddStep("seek before first object", () => EditorClock.Seek(0));
-            AddUntilStep("use current snap not available", () => composer.ChildrenOfType<ExpandableButton>().Single().Enabled.Value, () => Is.False);
+            AddUntilStep("use current snap not available", () => getCurrentSnapButton().Enabled.Value, () => Is.False);
 
             AddStep("seek to between objects", () => EditorClock.Seek(1500));
-            AddUntilStep("use current snap available", () => composer.ChildrenOfType<ExpandableButton>().Single().Enabled.Value, () => Is.True);
+            AddUntilStep("use current snap available", () => getCurrentSnapButton().Enabled.Value, () => Is.True);
 
             AddStep("seek after last object", () => EditorClock.Seek(2500));
-            AddUntilStep("use current snap not available", () => composer.ChildrenOfType<ExpandableButton>().Single().Enabled.Value, () => Is.False);
+            AddUntilStep("use current snap not available", () => getCurrentSnapButton().Enabled.Value, () => Is.False);
         }
 
         private void assertSnapDistance(float expectedDistance, HitObject? referenceObject, bool includeSliderVelocity)
@@ -262,7 +302,7 @@ namespace osu.Game.Tests.Editing
             => AddAssert($"distance = {distance} -> duration = {expectedDuration} (snapped)", () => composer.DistanceSnapProvider.FindSnappedDuration(referenceObject ?? new HitObject(), distance), () => Is.EqualTo(expectedDuration).Within(Precision.FLOAT_EPSILON));
 
         private void assertSnappedDistance(float distance, float expectedDistance, HitObject? referenceObject = null)
-            => AddAssert($"distance = {distance} -> distance = {expectedDistance} (snapped)", () => composer.DistanceSnapProvider.FindSnappedDistance(referenceObject ?? new HitObject(), distance), () => Is.EqualTo(expectedDistance).Within(Precision.FLOAT_EPSILON));
+            => AddAssert($"distance = {distance} -> distance = {expectedDistance} (snapped)", () => composer.DistanceSnapProvider.FindSnappedDistance(referenceObject ?? new HitObject(), distance, DistanceSnapTarget.End), () => Is.EqualTo(expectedDistance).Within(Precision.FLOAT_EPSILON));
 
         private partial class TestHitObjectComposer : OsuHitObjectComposer
         {

osu.Game.Tests/Utils/BindableValueAccessorTest.cs

@@ -0,0 +1,52 @@
+// 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 NUnit.Framework;
+using osu.Framework.Bindables;
+using osu.Game.Utils;
+
+namespace osu.Game.Tests.Utils
+{
+    [TestFixture]
+    public class BindableValueAccessorTest
+    {
+        [Test]
+        public void GetValue()
+        {
+            const int value = 1337;
+
+            BindableInt bindable = new BindableInt(value);
+            Assert.That(BindableValueAccessor.GetValue(bindable), Is.EqualTo(value));
+        }
+
+        [Test]
+        public void SetValue()
+        {
+            const int value = 1337;
+
+            BindableInt bindable = new BindableInt();
+            BindableValueAccessor.SetValue(bindable, value);
+
+            Assert.That(bindable.Value, Is.EqualTo(value));
+        }
+
+        [Test]
+        public void GetInvalidBindable()
+        {
+            BindableList<object> list = new BindableList<object>();
+            Assert.That(BindableValueAccessor.GetValue(list), Is.EqualTo(list));
+        }
+
+        [Test]
+        public void SetInvalidBindable()
+        {
+            const int value = 1337;
+
+            BindableList<int> list = new BindableList<int> { value };
+            BindableValueAccessor.SetValue(list, 2);
+
+            Assert.That(list, Has.Exactly(1).Items);
+            Assert.That(list[0], Is.EqualTo(value));
+        }
+    }
+}

osu.Game.Tests/Utils/GeometryUtilsTest.cs

@@ -0,0 +1,51 @@
+// 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 NUnit.Framework;
+using osu.Game.Utils;
+using osuTK;
+
+namespace osu.Game.Tests.Utils
+{
+    [TestFixture]
+    public class GeometryUtilsTest
+    {
+        [TestCase(new int[] { }, new int[] { })]
+        [TestCase(new[] { 0, 0 }, new[] { 0, 0 })]
+        [TestCase(new[] { 0, 0, 1, 1, 1, -1, 2, 0 }, new[] { 0, 0, 1, 1, 2, 0, 1, -1 })]
+        [TestCase(new[] { 0, 0, 1, 1, 1, -1, 2, 0, 1, 0 }, new[] { 0, 0, 1, 1, 2, 0, 1, -1 })]
+        [TestCase(new[] { 0, 0, 1, 1, 2, -1, 2, 0, 1, 0, 4, 10 }, new[] { 0, 0, 4, 10, 2, -1 })]
+        public void TestConvexHull(int[] values, int[] expected)
+        {
+            var points = new Vector2[values.Length / 2];
+            for (int i = 0; i < values.Length; i += 2)
+                points[i / 2] = new Vector2(values[i], values[i + 1]);
+
+            var expectedPoints = new Vector2[expected.Length / 2];
+            for (int i = 0; i < expected.Length; i += 2)
+                expectedPoints[i / 2] = new Vector2(expected[i], expected[i + 1]);
+
+            var hull = GeometryUtils.GetConvexHull(points);
+
+            Assert.That(hull, Is.EquivalentTo(expectedPoints));
+        }
+
+        [TestCase(new int[] { }, 0, 0, 0)]
+        [TestCase(new[] { 0, 0 }, 0, 0, 0)]
+        [TestCase(new[] { 0, 0, 1, 1, 1, -1, 2, 0 }, 1, 0, 1)]
+        [TestCase(new[] { 0, 0, 1, 1, 1, -1, 2, 0, 1, 0 }, 1, 0, 1)]
+        [TestCase(new[] { 0, 0, 1, 1, 2, -1, 2, 0, 1, 0, 4, 10 }, 3, 4.5f, 5.5901699f)]
+        public void TestMinimumEnclosingCircle(int[] values, float x, float y, float r)
+        {
+            var points = new Vector2[values.Length / 2];
+            for (int i = 0; i < values.Length; i += 2)
+                points[i / 2] = new Vector2(values[i], values[i + 1]);
+
+            (var centre, float radius) = GeometryUtils.MinimumEnclosingCircle(points);
+
+            Assert.That(centre.X, Is.EqualTo(x).Within(0.0001));
+            Assert.That(centre.Y, Is.EqualTo(y).Within(0.0001));
+            Assert.That(radius, Is.EqualTo(r).Within(0.0001));
+        }
+    }
+}

osu.Game.Tests/Visual/Editing/TestSceneColoursSection.cs

@@ -0,0 +1,123 @@
+// 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.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Graphics;
+using osu.Framework.Testing;
+using osu.Game.Beatmaps;
+using osu.Game.Graphics.UserInterfaceV2;
+using osu.Game.Overlays;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Screens.Edit;
+using osu.Game.Screens.Edit.Setup;
+using osu.Game.Skinning;
+using osuTK.Graphics;
+
+namespace osu.Game.Tests.Visual.Editing
+{
+    [HeadlessTest]
+    public partial class TestSceneColoursSection : OsuManualInputManagerTestScene
+    {
+        [Test]
+        public void TestNoBeatmapSkinColours()
+        {
+            LegacyBeatmapSkin skin = null!;
+            ColoursSection coloursSection = null!;
+
+            AddStep("create beatmap skin", () => skin = new LegacyBeatmapSkin(new BeatmapInfo(), null));
+            AddStep("create colours section", () => Child = new DependencyProvidingContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+                CachedDependencies =
+                [
+                    (typeof(EditorBeatmap), new EditorBeatmap(new Beatmap
+                    {
+                        BeatmapInfo = { Ruleset = new OsuRuleset().RulesetInfo }
+                    }, skin)),
+                    (typeof(OverlayColourProvider), new OverlayColourProvider(OverlayColourScheme.Aquamarine))
+                ],
+                Child = coloursSection = new ColoursSection
+                {
+                    RelativeSizeAxes = Axes.X,
+                }
+            });
+            AddAssert("beatmap skin has no colours", () => skin.Configuration.CustomComboColours, () => Is.Empty);
+            AddAssert("section displays default combo colours",
+                () => coloursSection.ChildrenOfType<FormColourPalette>().Single().Colours,
+                () => Is.EquivalentTo(new Colour4[]
+                {
+                    SkinConfiguration.DefaultComboColours[1],
+                    SkinConfiguration.DefaultComboColours[2],
+                    SkinConfiguration.DefaultComboColours[3],
+                    SkinConfiguration.DefaultComboColours[0],
+                }));
+
+            AddStep("add a colour", () => coloursSection.ChildrenOfType<FormColourPalette>().Single().Colours.Add(Colour4.Aqua));
+            AddAssert("beatmap skin has colours",
+                () => skin.Configuration.CustomComboColours,
+                () => Is.EquivalentTo(new[]
+                {
+                    SkinConfiguration.DefaultComboColours[1],
+                    SkinConfiguration.DefaultComboColours[2],
+                    SkinConfiguration.DefaultComboColours[3],
+                    Color4.Aqua,
+                    SkinConfiguration.DefaultComboColours[0],
+                }));
+        }
+
+        [Test]
+        public void TestExistingColours()
+        {
+            LegacyBeatmapSkin skin = null!;
+            ColoursSection coloursSection = null!;
+
+            AddStep("create beatmap skin", () =>
+            {
+                skin = new LegacyBeatmapSkin(new BeatmapInfo(), null);
+                skin.Configuration.CustomComboColours = new List<Color4>
+                {
+                    Color4.Azure,
+                    Color4.Beige,
+                    Color4.Chartreuse
+                };
+            });
+            AddStep("create colours section", () => Child = new DependencyProvidingContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+                CachedDependencies =
+                [
+                    (typeof(EditorBeatmap), new EditorBeatmap(new Beatmap
+                    {
+                        BeatmapInfo = { Ruleset = new OsuRuleset().RulesetInfo }
+                    }, skin)),
+                    (typeof(OverlayColourProvider), new OverlayColourProvider(OverlayColourScheme.Aquamarine))
+                ],
+                Child = coloursSection = new ColoursSection
+                {
+                    RelativeSizeAxes = Axes.X,
+                }
+            });
+            AddAssert("section displays combo colours",
+                () => coloursSection.ChildrenOfType<FormColourPalette>().Single().Colours,
+                () => Is.EquivalentTo(new[]
+                {
+                    Colour4.Beige,
+                    Colour4.Chartreuse,
+                    Colour4.Azure,
+                }));
+
+            AddStep("add a colour", () => coloursSection.ChildrenOfType<FormColourPalette>().Single().Colours.Add(Colour4.Aqua));
+            AddAssert("beatmap skin has colours",
+                () => skin.Configuration.CustomComboColours,
+                () => Is.EquivalentTo(new[]
+                {
+                    Color4.Azure,
+                    Color4.Beige,
+                    Color4.Aqua,
+                    Color4.Chartreuse
+                }));
+        }
+    }
+}

osu.Game.Tests/Visual/Editing/TestSceneComposeSelectBox.cs

@@ -84,6 +84,7 @@ namespace osu.Game.Tests.Visual.Editing
 
                 targetContainer = getTargetContainer();
                 initialRotation = targetContainer!.Rotation;
+                DefaultOrigin = ToLocalSpace(targetContainer.ToScreenSpace(Vector2.Zero));
 
                 base.Begin();
             }
@@ -134,7 +135,7 @@ namespace osu.Game.Tests.Visual.Editing
                 OriginalSurroundingQuad = new Quad(targetContainer!.X, targetContainer.Y, targetContainer.Width, targetContainer.Height);
             }
 
-            public override void Update(Vector2 scale, Vector2? origin = null, Axes adjustAxis = Axes.Both)
+            public override void Update(Vector2 scale, Vector2? origin = null, Axes adjustAxis = Axes.Both, float axisRotation = 0)
             {
                 if (targetContainer == null)
                     throw new InvalidOperationException($"Cannot {nameof(Update)} a scale operation without calling {nameof(Begin)} first!");

osu.Game.Tests/Visual/Editing/TestSceneComposerSelection.cs

@@ -4,9 +4,11 @@
 using System;
 using System.Linq;
 using NUnit.Framework;
+using osu.Framework.Graphics;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.UserInterface;
 using osu.Framework.Testing;
+using osu.Framework.Utils;
 using osu.Game.Beatmaps;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Rulesets;
@@ -36,6 +38,9 @@ namespace osu.Game.Tests.Visual.Editing
         private ContextMenuContainer contextMenuContainer
             => Editor.ChildrenOfType<ContextMenuContainer>().First();
 
+        private SelectionBoxScaleHandle getScaleHandle(Anchor anchor)
+            => Editor.ChildrenOfType<SelectionBoxScaleHandle>().First(it => it.Anchor == anchor);
+
         private void moveMouseToObject(Func<HitObject> targetFunc)
         {
             AddStep("move mouse to object", () =>
@@ -78,7 +83,7 @@ namespace osu.Game.Tests.Visual.Editing
         }
 
         [Test]
-        public void TestNudgeSelection()
+        public void TestNudgeSelectionTime()
         {
             HitCircle[] addedObjects = null!;
 
@@ -99,6 +104,51 @@ namespace osu.Game.Tests.Visual.Editing
             AddAssert("objects reverted to original position", () => addedObjects[0].StartTime == 100);
         }
 
+        [Test]
+        public void TestNudgeSelectionPosition()
+        {
+            HitCircle addedObject = null!;
+
+            AddStep("add hitobjects", () => EditorBeatmap.AddRange(new[]
+            {
+                addedObject = new HitCircle { StartTime = 200, Position = new Vector2(100) },
+            }));
+
+            AddStep("select object", () => EditorBeatmap.SelectedHitObjects.Add(addedObject));
+
+            AddStep("nudge up", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.Key(Key.Up);
+                InputManager.ReleaseKey(Key.ControlLeft);
+            });
+            AddAssert("object position moved up", () => addedObject.Position.Y, () => Is.EqualTo(99).Within(Precision.FLOAT_EPSILON));
+
+            AddStep("nudge down", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.Key(Key.Down);
+                InputManager.ReleaseKey(Key.ControlLeft);
+            });
+            AddAssert("object position moved down", () => addedObject.Position.Y, () => Is.EqualTo(100).Within(Precision.FLOAT_EPSILON));
+
+            AddStep("nudge left", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.Key(Key.Left);
+                InputManager.ReleaseKey(Key.ControlLeft);
+            });
+            AddAssert("object position moved left", () => addedObject.Position.X, () => Is.EqualTo(99).Within(Precision.FLOAT_EPSILON));
+
+            AddStep("nudge right", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.Key(Key.Right);
+                InputManager.ReleaseKey(Key.ControlLeft);
+            });
+            AddAssert("object position moved right", () => addedObject.Position.X, () => Is.EqualTo(100).Within(Precision.FLOAT_EPSILON));
+        }
+
         [Test]
         public void TestRotateHotkeys()
         {
@@ -215,6 +265,51 @@ namespace osu.Game.Tests.Visual.Editing
             AddAssert("2 hitobjects selected", () => EditorBeatmap.SelectedHitObjects.Count == 2 && !EditorBeatmap.SelectedHitObjects.Contains(addedObjects[1]));
         }
 
+        [Test]
+        public void TestMultiSelectWithDragBox()
+        {
+            var addedObjects = new[]
+            {
+                new HitCircle { StartTime = 100 },
+                new HitCircle { StartTime = 200, Position = new Vector2(100) },
+                new HitCircle { StartTime = 300, Position = new Vector2(512, 0) },
+                new HitCircle { StartTime = 400, Position = new Vector2(412, 100) },
+            };
+            AddStep("add hitobjects", () => EditorBeatmap.AddRange(addedObjects));
+
+            AddStep("start dragging", () =>
+            {
+                InputManager.MoveMouseTo(blueprintContainer.ScreenSpaceDrawQuad.Centre);
+                InputManager.PressButton(MouseButton.Left);
+            });
+            AddStep("drag to left corner", () => InputManager.MoveMouseTo(blueprintContainer.ScreenSpaceDrawQuad.TopLeft - new Vector2(5)));
+            AddStep("end dragging", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            AddAssert("2 hitobjects selected", () => EditorBeatmap.SelectedHitObjects, () => Has.Count.EqualTo(2));
+
+            AddStep("start dragging with control", () =>
+            {
+                InputManager.MoveMouseTo(blueprintContainer.ScreenSpaceDrawQuad.Centre);
+                InputManager.PressButton(MouseButton.Left);
+                InputManager.PressKey(Key.ControlLeft);
+            });
+            AddStep("drag to left corner", () => InputManager.MoveMouseTo(blueprintContainer.ScreenSpaceDrawQuad.TopRight + new Vector2(5, -5)));
+            AddStep("end dragging", () => InputManager.ReleaseButton(MouseButton.Left));
+            AddStep("release control", () => InputManager.ReleaseKey(Key.ControlLeft));
+
+            AddAssert("4 hitobjects selected", () => EditorBeatmap.SelectedHitObjects, () => Has.Count.EqualTo(4));
+
+            AddStep("start dragging without control", () =>
+            {
+                InputManager.MoveMouseTo(blueprintContainer.ScreenSpaceDrawQuad.Centre);
+                InputManager.PressButton(MouseButton.Left);
+            });
+            AddStep("drag to left corner", () => InputManager.MoveMouseTo(blueprintContainer.ScreenSpaceDrawQuad.TopRight + new Vector2(5, -5)));
+            AddStep("end dragging", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            AddAssert("2 hitobjects selected", () => EditorBeatmap.SelectedHitObjects, () => Has.Count.EqualTo(2));
+        }
+
         [Test]
         public void TestNearestSelection()
         {
@@ -519,5 +614,137 @@ namespace osu.Game.Tests.Visual.Editing
 
             AddStep("release shift", () => InputManager.ReleaseKey(Key.ShiftLeft));
         }
+
+        [Test]
+        public void TestShiftModifierMaintainsAspectRatio()
+        {
+            HitCircle[] addedObjects = null!;
+
+            float aspectRatioBeforeDrag = 0;
+
+            float getAspectRatio() => (addedObjects[1].X - addedObjects[0].X) / (addedObjects[1].Y - addedObjects[0].Y);
+
+            AddStep("add hitobjects", () =>
+            {
+                EditorBeatmap.AddRange(addedObjects = new[]
+                {
+                    new HitCircle { StartTime = 100, Position = new Vector2(150, 150) },
+                    new HitCircle { StartTime = 200, Position = new Vector2(250, 200) },
+                });
+
+                aspectRatioBeforeDrag = getAspectRatio();
+            });
+
+            AddStep("select objects", () => EditorBeatmap.SelectedHitObjects.AddRange(addedObjects));
+
+            AddStep("move mouse to handle", () => InputManager.MoveMouseTo(getScaleHandle(Anchor.BottomRight).ScreenSpaceDrawQuad.Centre));
+
+            AddStep("begin drag", () => InputManager.PressButton(MouseButton.Left));
+
+            AddStep("move mouse", () => InputManager.MoveMouseTo(InputManager.CurrentState.Mouse.Position + new Vector2(50, 0)));
+
+            AddStep("aspect ratio does not equal", () => Assert.AreNotEqual(aspectRatioBeforeDrag, getAspectRatio()));
+
+            AddStep("press shift", () => InputManager.PressKey(Key.ShiftLeft));
+
+            AddStep("aspect ratio does equal", () => Assert.AreEqual(aspectRatioBeforeDrag, getAspectRatio()));
+
+            AddStep("end drag", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            AddStep("release shift", () => InputManager.ReleaseKey(Key.ShiftLeft));
+        }
+
+        [Test]
+        public void TestAltModifierScalesAroundCenter()
+        {
+            HitCircle[] addedObjects = null!;
+
+            Vector2 centerBeforeDrag = Vector2.Zero;
+
+            Vector2 getCenter() => (addedObjects[0].Position + addedObjects[1].Position) / 2;
+
+            AddStep("add hitobjects", () =>
+            {
+                EditorBeatmap.AddRange(addedObjects = new[]
+                {
+                    new HitCircle { StartTime = 100, Position = new Vector2(150, 150) },
+                    new HitCircle { StartTime = 200, Position = new Vector2(250, 200) },
+                });
+
+                centerBeforeDrag = getCenter();
+            });
+
+            AddStep("select objects", () => EditorBeatmap.SelectedHitObjects.AddRange(addedObjects));
+
+            AddStep("move mouse to handle", () => InputManager.MoveMouseTo(getScaleHandle(Anchor.BottomRight).ScreenSpaceDrawQuad.Centre));
+
+            AddStep("begin drag", () => InputManager.PressButton(MouseButton.Left));
+
+            AddStep("move mouse", () => InputManager.MoveMouseTo(InputManager.CurrentState.Mouse.Position + new Vector2(50, 0)));
+
+            AddStep("center does not equal", () => Assert.AreNotEqual(centerBeforeDrag, getCenter()));
+
+            AddStep("press alt", () => InputManager.PressKey(Key.AltLeft));
+
+            AddStep("center does equal", () => Assert.AreEqual(centerBeforeDrag, getCenter()));
+
+            AddStep("end drag", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            AddStep("release alt", () => InputManager.ReleaseKey(Key.AltLeft));
+        }
+
+        [Test]
+        public void TestShiftAndAltModifierKeys()
+        {
+            HitCircle[] addedObjects = null!;
+
+            float aspectRatioBeforeDrag = 0;
+
+            Vector2 centerBeforeDrag = Vector2.Zero;
+
+            float getAspectRatio() => (addedObjects[1].X - addedObjects[0].X) / (addedObjects[1].Y - addedObjects[0].Y);
+
+            Vector2 getCenter() => (addedObjects[0].Position + addedObjects[1].Position) / 2;
+
+            AddStep("add hitobjects", () =>
+            {
+                EditorBeatmap.AddRange(addedObjects = new[]
+                {
+                    new HitCircle { StartTime = 100, Position = new Vector2(150, 150) },
+                    new HitCircle { StartTime = 200, Position = new Vector2(250, 200) },
+                });
+
+                aspectRatioBeforeDrag = getAspectRatio();
+                centerBeforeDrag = getCenter();
+            });
+
+            AddStep("select objects", () => EditorBeatmap.SelectedHitObjects.AddRange(addedObjects));
+
+            AddStep("move mouse to handle", () => InputManager.MoveMouseTo(getScaleHandle(Anchor.BottomRight).ScreenSpaceDrawQuad.Centre));
+
+            AddStep("begin drag", () => InputManager.PressButton(MouseButton.Left));
+
+            AddStep("move mouse", () => InputManager.MoveMouseTo(InputManager.CurrentState.Mouse.Position + new Vector2(50, 0)));
+
+            AddStep("aspect ratio does not equal", () => Assert.AreNotEqual(aspectRatioBeforeDrag, getAspectRatio()));
+
+            AddStep("center does not equal", () => Assert.AreNotEqual(centerBeforeDrag, getCenter()));
+
+            AddStep("press shift", () => InputManager.PressKey(Key.ShiftLeft));
+
+            AddStep("aspect ratio does equal", () => Assert.AreEqual(aspectRatioBeforeDrag, getAspectRatio()));
+
+            AddStep("center does not equal", () => Assert.AreNotEqual(centerBeforeDrag, getCenter()));
+
+            AddStep("press alt", () => InputManager.PressKey(Key.AltLeft));
+
+            AddStep("center does equal", () => Assert.AreEqual(centerBeforeDrag, getCenter()));
+
+            AddStep("end drag", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            AddStep("release shift", () => InputManager.ReleaseKey(Key.ShiftLeft));
+
+            AddStep("release alt", () => InputManager.ReleaseKey(Key.AltLeft));
+        }
     }
 }

osu.Game.Tests/Visual/Editing/TestSceneDesignSection.cs

@@ -7,12 +7,14 @@ using System;
 using System.Globalization;
 using System.Linq;
 using NUnit.Framework;
+using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.UserInterface;
 using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using osu.Game.Graphics.UserInterfaceV2;
+using osu.Game.Overlays;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.Edit;
 using osu.Game.Screens.Edit.Setup;
@@ -25,6 +27,9 @@ namespace osu.Game.Tests.Visual.Editing
         private TestDesignSection designSection;
         private EditorBeatmap editorBeatmap { get; set; }
 
+        [Cached]
+        private OverlayColourProvider colourProvider = new OverlayColourProvider(OverlayColourScheme.Aquamarine);
+
         [SetUpSteps]
         public void SetUp()
         {
@@ -42,7 +47,7 @@ namespace osu.Game.Tests.Visual.Editing
                 {
                     (typeof(EditorBeatmap), editorBeatmap)
                 },
-                Child = designSection = new TestDesignSection()
+                Child = designSection = new TestDesignSection { RelativeSizeAxes = Axes.X }
             });
         }
 
@@ -99,11 +104,11 @@ namespace osu.Game.Tests.Visual.Editing
 
         private partial class TestDesignSection : DesignSection
         {
-            public new LabelledSwitchButton EnableCountdown => base.EnableCountdown;
+            public new FormCheckBox EnableCountdown => base.EnableCountdown;
 
             public new FillFlowContainer CountdownSettings => base.CountdownSettings;
-            public new LabelledEnumDropdown<CountdownType> CountdownSpeed => base.CountdownSpeed;
+            public new FormEnumDropdown<CountdownType> CountdownSpeed => base.CountdownSpeed;
-            public new LabelledNumberBox CountdownOffset => base.CountdownOffset;
+            public new FormTextBox CountdownOffset => base.CountdownOffset;
         }
     }
 }

osu.Game.Tests/Visual/Editing/TestSceneDifficultyDelete.cs

@@ -13,6 +13,7 @@ using osu.Game.Graphics.UserInterface;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.Edit;
+using osu.Game.Screens.Edit.Components.Menus;
 using osu.Game.Storyboards;
 using osu.Game.Tests.Beatmaps.IO;
 using osuTK.Input;
@@ -60,7 +61,7 @@ namespace osu.Game.Tests.Visual.Editing
                     beatmapSetHashBefore = Beatmap.Value.BeatmapSetInfo.Hash;
                 });
 
-                AddStep("click File", () => this.ChildrenOfType<DrawableOsuMenuItem>().First().TriggerClick());
+                AddStep("click File", () => this.ChildrenOfType<EditorMenuBar.DrawableEditorBarMenuItem>().First().TriggerClick());
 
                 if (i == 11)
                 {
@@ -107,7 +108,7 @@ namespace osu.Game.Tests.Visual.Editing
                 EditorBeatmap.EndChange();
             });
 
-            AddStep("click File", () => this.ChildrenOfType<DrawableOsuMenuItem>().First().TriggerClick());
+            AddStep("click File", () => this.ChildrenOfType<EditorMenuBar.DrawableEditorBarMenuItem>().First().TriggerClick());
 
             AddStep("click delete", () => getDeleteMenuItem().TriggerClick());
             AddUntilStep("wait for dialog", () => DialogOverlay.CurrentDialog != null);

osu.Game.Tests/Visual/Editing/TestSceneDistanceSnapGrid.cs

@@ -199,7 +199,7 @@ namespace osu.Game.Tests.Visual.Editing
 
             public double FindSnappedDuration(HitObject referenceObject, float distance) => 0;
 
-            public float FindSnappedDistance(HitObject referenceObject, float distance) => 0;
+            public float FindSnappedDistance(HitObject referenceObject, float distance, DistanceSnapTarget target) => 0;
         }
     }
 }

osu.Game.Tests/Visual/Editing/TestSceneEditorSeeking.cs

@@ -1,11 +1,13 @@
 // 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.Linq;
 using NUnit.Framework;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Osu;
+using osu.Game.Rulesets.Osu.Objects;
 using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Editing
@@ -135,9 +137,42 @@ namespace osu.Game.Tests.Visual.Editing
             pressAndCheckTime(Key.Up, 0);
         }
 
-        private void pressAndCheckTime(Key key, double expectedTime)
+        [Test]
+        public void TestSeekBetweenObjects()
         {
-            AddStep($"press {key}", () => InputManager.Key(key));
+            AddStep("add objects", () =>
+            {
+                EditorBeatmap.Clear();
+                EditorBeatmap.AddRange(new[]
+                {
+                    new HitCircle { StartTime = 1000, },
+                    new HitCircle { StartTime = 2250, },
+                    new HitCircle { StartTime = 3600, },
+                });
+            });
+            AddStep("seek to 0", () => EditorClock.Seek(0));
+
+            pressAndCheckTime(Key.Right, 1000, Key.ControlLeft);
+            pressAndCheckTime(Key.Right, 2250, Key.ControlLeft);
+            pressAndCheckTime(Key.Right, 3600, Key.ControlLeft);
+            pressAndCheckTime(Key.Right, 3600, Key.ControlLeft);
+            pressAndCheckTime(Key.Left, 2250, Key.ControlLeft);
+            pressAndCheckTime(Key.Left, 1000, Key.ControlLeft);
+            pressAndCheckTime(Key.Left, 1000, Key.ControlLeft);
+        }
+
+        private void pressAndCheckTime(Key key, double expectedTime, params Key[] modifiers)
+        {
+            AddStep($"press {key} with {(modifiers.Any() ? string.Join(',', modifiers) : "no modifiers")}", () =>
+            {
+                foreach (var modifier in modifiers)
+                    InputManager.PressKey(modifier);
+
+                InputManager.Key(key);
+
+                foreach (var modifier in modifiers)
+                    InputManager.ReleaseKey(modifier);
+            });
             AddUntilStep($"time is {expectedTime}", () => EditorClock.CurrentTime, () => Is.EqualTo(expectedTime).Within(1));
         }
     }

osu.Game.Tests/Visual/Editing/TestSceneMetadataSection.cs

@@ -6,11 +6,13 @@
 using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Graphics;
 using osu.Framework.Graphics.UserInterface;
 using osu.Framework.Input;
 using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using osu.Game.Graphics.UserInterfaceV2;
+using osu.Game.Overlays;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.Edit;
 using osu.Game.Screens.Edit.Setup;
@@ -20,6 +22,9 @@ namespace osu.Game.Tests.Visual.Editing
 {
     public partial class TestSceneMetadataSection : OsuManualInputManagerTestScene
     {
+        [Cached]
+        private OverlayColourProvider colourProvider = new OverlayColourProvider(OverlayColourScheme.Aquamarine);
+
         [Cached]
         private EditorBeatmap editorBeatmap = new EditorBeatmap(new Beatmap
         {
@@ -201,7 +206,7 @@ namespace osu.Game.Tests.Visual.Editing
         }
 
         private void createSection()
-            => AddStep("create metadata section", () => Child = metadataSection = new TestMetadataSection());
+            => AddStep("create metadata section", () => Child = metadataSection = new TestMetadataSection { RelativeSizeAxes = Axes.X });
 
         private void assertArtistMetadata(string expected)
             => AddAssert($"artist metadata is {expected}", () => editorBeatmap.Metadata.Artist, () => Is.EqualTo(expected));
@@ -226,11 +231,11 @@ namespace osu.Game.Tests.Visual.Editing
 
         private partial class TestMetadataSection : MetadataSection
         {
-            public new LabelledTextBox ArtistTextBox => base.ArtistTextBox;
+            public new FormTextBox ArtistTextBox => base.ArtistTextBox;
-            public new LabelledTextBox RomanisedArtistTextBox => base.RomanisedArtistTextBox;
+            public new FormTextBox RomanisedArtistTextBox => base.RomanisedArtistTextBox;
 
-            public new LabelledTextBox TitleTextBox => base.TitleTextBox;
+            public new FormTextBox TitleTextBox => base.TitleTextBox;
-            public new LabelledTextBox RomanisedTitleTextBox => base.RomanisedTitleTextBox;
+            public new FormTextBox RomanisedTitleTextBox => base.RomanisedTitleTextBox;
         }
     }
 }

osu.Game.Tests/Visual/Editing/TestSceneOpenEditorTimestamp.cs

@@ -100,6 +100,20 @@ namespace osu.Game.Tests.Visual.Editing
             assertOnScreenAt(EditorScreenMode.Compose, 0);
         }
 
+        [Test]
+        public void TestUrlDecodingOfArgs()
+        {
+            setUpEditor(new OsuRuleset().RulesetInfo);
+            AddAssert("is osu! ruleset", () => editorBeatmap.BeatmapInfo.Ruleset.Equals(new OsuRuleset().RulesetInfo));
+
+            AddStep("jump to encoded link", () => Game.HandleLink("osu://edit/00:14:142%20(1)"));
+
+            AddUntilStep("wait for seek", () => editorClock.SeekingOrStopped.Value);
+
+            AddAssert("time is correct", () => editorClock.CurrentTime, () => Is.EqualTo(14_142));
+            AddAssert("selected object is correct", () => editorBeatmap.SelectedHitObjects.Single().StartTime, () => Is.EqualTo(14_142));
+        }
+
         private void addStepClickLink(string timestamp, string step = "", bool waitForSeek = true)
         {
             AddStep($"{step} {timestamp}", () =>

osu.Game.Tests/Visual/Gameplay/TestSceneSpectator.cs

@@ -19,6 +19,7 @@ using osu.Game.Rulesets.UI;
 using osu.Game.Scoring;
 using osu.Game.Screens;
 using osu.Game.Screens.Play;
+using osu.Game.Screens.Play.HUD.JudgementCounter;
 using osu.Game.Tests.Beatmaps.IO;
 using osu.Game.Tests.Gameplay;
 using osu.Game.Tests.Visual.Multiplayer;
@@ -167,14 +168,16 @@ namespace osu.Game.Tests.Visual.Gameplay
         public void TestSpectatingDuringGameplay()
         {
             start();
-            sendFrames(300);
+            sendFrames(300, initialResultCount: 100);
 
             loadSpectatingScreen();
             waitForPlayerCurrent();
 
-            sendFrames(300);
+            sendFrames(300, initialResultCount: 100);
 
             AddUntilStep("playing from correct point in time", () => player.ChildrenOfType<DrawableRuleset>().First().FrameStableClock.CurrentTime, () => Is.GreaterThan(30000));
+            AddAssert("check judgement counts are correct", () => player.ChildrenOfType<JudgementCountController>().Single().Counters.Sum(c => c.ResultCount.Value),
+                () => Is.GreaterThanOrEqualTo(100));
         }
 
         [Test]
@@ -405,9 +408,9 @@ namespace osu.Game.Tests.Visual.Gameplay
         private void checkPaused(bool state) =>
             AddUntilStep($"game is {(state ? "paused" : "playing")}", () => player.ChildrenOfType<DrawableRuleset>().First().IsPaused.Value == state);
 
-        private void sendFrames(int count = 10, double startTime = 0)
+        private void sendFrames(int count = 10, double startTime = 0, int initialResultCount = 0)
         {
-            AddStep("send frames", () => spectatorClient.SendFramesFromUser(streamingUser.Id, count, startTime));
+            AddStep("send frames", () => spectatorClient.SendFramesFromUser(streamingUser.Id, count, startTime, initialResultCount));
         }
 
         private void loadSpectatingScreen()