Merge pull request #30164 from bdach/am-i-fired-this-time

Fix game deadlocking on startup when set to single thread mode

.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
-          create_if_not_exists: false
+          mode: recreate
           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
-          create_if_not_exists: false
+          mode: recreate
           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="2024.809.2" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2024.1009.0" />
   </ItemGroup>
   <PropertyGroup>
     <!-- Fody does not handle Android build well, and warns when unchanged.

osu.Android/GameplayScreenRotationLocker.cs

@@ -6,28 +6,29 @@ using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Game;
+using osu.Game.Screens.Play;
 
 namespace osu.Android
 {
     public partial class GameplayScreenRotationLocker : Component
     {
-        private Bindable<bool> localUserPlaying = null!;
+        private IBindable<LocalUserPlayingState> localUserPlaying = null!;
 
         [Resolved]
         private OsuGameActivity gameActivity { get; set; } = null!;
 
         [BackgroundDependencyLoader]
-        private void load(OsuGame game)
+        private void load(ILocalUserPlayInfo localUserPlayInfo)
         {
-            localUserPlaying = game.LocalUserPlaying.GetBoundCopy();
+            localUserPlaying = localUserPlayInfo.PlayingState.GetBoundCopy();
             localUserPlaying.BindValueChanged(updateLock, true);
         }
 
-        private void updateLock(ValueChangedEvent<bool> userPlaying)
+        private void updateLock(ValueChangedEvent<LocalUserPlayingState> userPlaying)
         {
             gameActivity.RunOnUiThread(() =>
             {
-                gameActivity.RequestedOrientation = userPlaying.NewValue ? ScreenOrientation.Locked : gameActivity.DefaultOrientation;
+                gameActivity.RequestedOrientation = userPlaying.NewValue != LocalUserPlayingState.NotPlaying ? ScreenOrientation.Locked : gameActivity.DefaultOrientation;
             });
         }
     }

osu.Android/OsuGameAndroid.cs

@@ -80,7 +80,7 @@ namespace osu.Android
             host.Window.CursorState |= CursorState.Hidden;
         }
 
-        protected override UpdateManager CreateUpdateManager() => new SimpleUpdateManager();
+        protected override UpdateManager CreateUpdateManager() => new MobileUpdateNotifier();
 
         protected override BatteryInfo CreateBatteryInfo() => new AndroidBatteryInfo();
 

osu.Desktop/OsuGameDesktop.cs

@@ -2,10 +2,10 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
-using System.Diagnostics;
 using System.IO;
 using System.Reflection;
 using System.Runtime.Versioning;
+using System.Threading.Tasks;
 using Microsoft.Win32;
 using osu.Desktop.Performance;
 using osu.Desktop.Security;
@@ -95,42 +95,20 @@ namespace osu.Desktop
                 return key?.OpenSubKey(WindowsAssociationManager.SHELL_OPEN_COMMAND)?.GetValue(string.Empty)?.ToString()?.Split('"')[1].Replace("osu!.exe", "");
         }
 
+        public static bool IsPackageManaged => !string.IsNullOrEmpty(Environment.GetEnvironmentVariable("OSU_EXTERNAL_UPDATE_PROVIDER"));
+
         protected override UpdateManager CreateUpdateManager()
         {
-            string? packageManaged = Environment.GetEnvironmentVariable("OSU_EXTERNAL_UPDATE_PROVIDER");
-
-            if (!string.IsNullOrEmpty(packageManaged))
+            if (IsPackageManaged)
                 return new NoActionUpdateManager();
 
-            switch (RuntimeInfo.OS)
-            {
-                case RuntimeInfo.Platform.Windows:
-                    Debug.Assert(OperatingSystem.IsWindows());
-
-                    return new SquirrelUpdateManager();
-
-                default:
-                    return new SimpleUpdateManager();
-            }
+            return new VelopackUpdateManager();
         }
 
         public override bool RestartAppWhenExited()
         {
-            switch (RuntimeInfo.OS)
-            {
-                case RuntimeInfo.Platform.Windows:
-                    Debug.Assert(OperatingSystem.IsWindows());
-
-                    // Of note, this is an async method in squirrel that adds an arbitrary delay before returning
-                    // likely to ensure the external process is in a good state.
-                    //
-                    // We're not waiting on that here, but the outro playing before the actual exit should be enough
-                    // to cover this.
-                    Squirrel.UpdateManager.RestartAppWhenExited().FireAndForget();
-                    return true;
-            }
-
-            return base.RestartAppWhenExited();
+            Task.Run(() => Velopack.UpdateExe.Start()).FireAndForget();
+            return true;
         }
 
         protected override void LoadComplete()

osu.Desktop/Program.cs

@@ -14,7 +14,7 @@ using osu.Game;
 using osu.Game.IPC;
 using osu.Game.Tournament;
 using SDL;
-using Squirrel;
+using Velopack;
 
 namespace osu.Desktop
 {
@@ -31,19 +31,11 @@ namespace osu.Desktop
         [STAThread]
         public static void Main(string[] args)
         {
-            /*
-             * WARNING: DO NOT PLACE **ANY** CODE ABOVE THE FOLLOWING BLOCK!
-             *
-             * Logic handling Squirrel MUST run before EVERYTHING if you do not want to break it.
-             * To be more precise: Squirrel is internally using a rather... crude method to determine whether it is running under NUnit,
-             * namely by checking loaded assemblies:
-             * https://github.com/clowd/Clowd.Squirrel/blob/24427217482deeeb9f2cacac555525edfc7bd9ac/src/Squirrel/SimpleSplat/PlatformModeDetector.cs#L17-L32
-             *
-             * If it finds ANY assembly from the ones listed above - REGARDLESS of the reason why it is loaded -
-             * the app will then do completely broken things like:
-             * - not creating system shortcuts (as the logic is if'd out if "running tests")
-             * - not exiting after the install / first-update / uninstall hooks are ran (as the `Environment.Exit()` calls are if'd out if "running tests")
-             */
+            // IMPORTANT DON'T IGNORE: For general sanity, velopack's setup needs to run before anything else.
+            // This has bitten us in the rear before (bricked updater), and although the underlying issue from
+            // last time has been fixed, let's not tempt fate.
+            setupVelopack();
+
             if (OperatingSystem.IsWindows())
             {
                 var windowsVersion = Environment.OSVersion.Version;
@@ -66,8 +58,6 @@ namespace osu.Desktop
                         return;
                     }
                 }
-
-                setupSquirrel();
             }
 
             // NVIDIA profiles are based on the executable name of a process.
@@ -177,32 +167,28 @@ namespace osu.Desktop
             return false;
         }
 
-        [SupportedOSPlatform("windows")]
-        private static void setupSquirrel()
+        private static void setupVelopack()
         {
-            SquirrelAwareApp.HandleEvents(onInitialInstall: (_, tools) =>
+            if (OsuGameDesktop.IsPackageManaged)
             {
-                tools.CreateShortcutForThisExe();
-                tools.CreateUninstallerRegistryEntry();
-                WindowsAssociationManager.InstallAssociations();
-            }, onAppUpdate: (_, tools) =>
-            {
-                tools.CreateUninstallerRegistryEntry();
-                WindowsAssociationManager.UpdateAssociations();
-            }, onAppUninstall: (_, tools) =>
-            {
-                tools.RemoveShortcutForThisExe();
-                tools.RemoveUninstallerRegistryEntry();
-                WindowsAssociationManager.UninstallAssociations();
-            }, onEveryRun: (_, _, _) =>
-            {
-                // While setting the `ProcessAppUserModelId` fixes duplicate icons/shortcuts on the taskbar, it currently
-                // causes the right-click context menu to function incorrectly.
-                //
-                // This may turn out to be non-required after an alternative solution is implemented.
-                // see https://github.com/clowd/Clowd.Squirrel/issues/24
-                // tools.SetProcessAppUserModelId();
-            });
+                Logger.Log("Updates are being managed by an external provider. Skipping Velopack setup.");
+                return;
+            }
+
+            var app = VelopackApp.Build();
+
+            if (OperatingSystem.IsWindows())
+                configureWindows(app);
+
+            app.Run();
+        }
+
+        [SupportedOSPlatform("windows")]
+        private static void configureWindows(VelopackApp app)
+        {
+            app.WithFirstRun(_ => WindowsAssociationManager.InstallAssociations());
+            app.WithAfterUpdateFastCallback(_ => WindowsAssociationManager.UpdateAssociations());
+            app.WithBeforeUninstallFastCallback(_ => WindowsAssociationManager.UninstallAssociations());
         }
     }
 }

osu.Desktop/Updater/SquirrelUpdateManager.cs

@@ -1,180 +0,0 @@
-// 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.Runtime.Versioning;
-using System.Threading.Tasks;
-using osu.Framework.Allocation;
-using osu.Framework.Logging;
-using osu.Game;
-using osu.Game.Overlays;
-using osu.Game.Overlays.Notifications;
-using osu.Game.Screens.Play;
-using Squirrel.SimpleSplat;
-using Squirrel.Sources;
-using LogLevel = Squirrel.SimpleSplat.LogLevel;
-using UpdateManager = osu.Game.Updater.UpdateManager;
-
-namespace osu.Desktop.Updater
-{
-    [SupportedOSPlatform("windows")]
-    public partial class SquirrelUpdateManager : UpdateManager
-    {
-        private Squirrel.UpdateManager? updateManager;
-        private INotificationOverlay notificationOverlay = null!;
-
-        public Task PrepareUpdateAsync() => Squirrel.UpdateManager.RestartAppWhenExited();
-
-        private static readonly Logger logger = Logger.GetLogger("updater");
-
-        /// <summary>
-        /// Whether an update has been downloaded but not yet applied.
-        /// </summary>
-        private bool updatePending;
-
-        private readonly SquirrelLogger squirrelLogger = new SquirrelLogger();
-
-        [Resolved]
-        private OsuGameBase game { get; set; } = null!;
-
-        [Resolved]
-        private ILocalUserPlayInfo? localUserInfo { get; set; }
-
-        [BackgroundDependencyLoader]
-        private void load(INotificationOverlay notifications)
-        {
-            notificationOverlay = notifications;
-
-            SquirrelLocator.CurrentMutable.Register(() => squirrelLogger, typeof(ILogger));
-        }
-
-        protected override async Task<bool> PerformUpdateCheck() => await checkForUpdateAsync().ConfigureAwait(false);
-
-        private async Task<bool> checkForUpdateAsync(bool useDeltaPatching = true, UpdateProgressNotification? notification = null)
-        {
-            // should we schedule a retry on completion of this check?
-            bool scheduleRecheck = true;
-
-            const string? github_token = null; // TODO: populate.
-
-            try
-            {
-                // Avoid any kind of update checking while gameplay is running.
-                if (localUserInfo?.IsPlaying.Value == true)
-                    return false;
-
-                updateManager ??= new Squirrel.UpdateManager(new GithubSource(@"https://github.com/ppy/osu", github_token, false), @"osulazer");
-
-                var info = await updateManager.CheckForUpdate(!useDeltaPatching).ConfigureAwait(false);
-
-                if (info.ReleasesToApply.Count == 0)
-                {
-                    if (updatePending)
-                    {
-                        // the user may have dismissed the completion notice, so show it again.
-                        notificationOverlay.Post(new UpdateApplicationCompleteNotification
-                        {
-                            Activated = () =>
-                            {
-                                restartToApplyUpdate();
-                                return true;
-                            },
-                        });
-                        return true;
-                    }
-
-                    // no updates available. bail and retry later.
-                    return false;
-                }
-
-                scheduleRecheck = false;
-
-                if (notification == null)
-                {
-                    notification = new UpdateProgressNotification
-                    {
-                        CompletionClickAction = restartToApplyUpdate,
-                    };
-
-                    Schedule(() => notificationOverlay.Post(notification));
-                }
-
-                notification.StartDownload();
-
-                try
-                {
-                    await updateManager.DownloadReleases(info.ReleasesToApply, p => notification.Progress = p / 100f).ConfigureAwait(false);
-
-                    notification.StartInstall();
-
-                    await updateManager.ApplyReleases(info, p => notification.Progress = p / 100f).ConfigureAwait(false);
-
-                    notification.State = ProgressNotificationState.Completed;
-                    updatePending = true;
-                }
-                catch (Exception e)
-                {
-                    if (useDeltaPatching)
-                    {
-                        logger.Add(@"delta patching failed; will attempt full download!");
-
-                        // could fail if deltas are unavailable for full update path (https://github.com/Squirrel/Squirrel.Windows/issues/959)
-                        // try again without deltas.
-                        await checkForUpdateAsync(false, notification).ConfigureAwait(false);
-                    }
-                    else
-                    {
-                        // In the case of an error, a separate notification will be displayed.
-                        notification.FailDownload();
-                        Logger.Error(e, @"update failed!");
-                    }
-                }
-            }
-            catch (Exception)
-            {
-                // we'll ignore this and retry later. can be triggered by no internet connection or thread abortion.
-                scheduleRecheck = true;
-            }
-            finally
-            {
-                if (scheduleRecheck)
-                {
-                    // check again in 30 minutes.
-                    Scheduler.AddDelayed(() => Task.Run(async () => await checkForUpdateAsync().ConfigureAwait(false)), 60000 * 30);
-                }
-            }
-
-            return true;
-        }
-
-        private bool restartToApplyUpdate()
-        {
-            PrepareUpdateAsync()
-                .ContinueWith(_ => Schedule(() => game.AttemptExit()));
-            return true;
-        }
-
-        protected override void Dispose(bool isDisposing)
-        {
-            base.Dispose(isDisposing);
-            updateManager?.Dispose();
-        }
-
-        private class SquirrelLogger : ILogger, IDisposable
-        {
-            public LogLevel Level { get; set; } = LogLevel.Info;
-
-            public void Write(string message, LogLevel logLevel)
-            {
-                if (logLevel < Level)
-                    return;
-
-                logger.Add(message);
-            }
-
-            public void Dispose()
-            {
-            }
-        }
-    }
-}

osu.Desktop/Updater/VelopackUpdateManager.cs

@@ -0,0 +1,148 @@
+// 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.Threading.Tasks;
+using osu.Framework.Allocation;
+using osu.Framework.Logging;
+using osu.Game;
+using osu.Game.Overlays;
+using osu.Game.Overlays.Notifications;
+using osu.Game.Screens.Play;
+using Velopack;
+using Velopack.Sources;
+
+namespace osu.Desktop.Updater
+{
+    public partial class VelopackUpdateManager : Game.Updater.UpdateManager
+    {
+        private readonly UpdateManager updateManager;
+        private INotificationOverlay notificationOverlay = null!;
+
+        [Resolved]
+        private OsuGameBase game { get; set; } = null!;
+
+        [Resolved]
+        private ILocalUserPlayInfo? localUserInfo { get; set; }
+
+        private bool isInGameplay => localUserInfo?.PlayingState.Value != LocalUserPlayingState.NotPlaying;
+
+        private UpdateInfo? pendingUpdate;
+
+        public VelopackUpdateManager()
+        {
+            updateManager = new UpdateManager(new GithubSource(@"https://github.com/ppy/osu", null, false), new UpdateOptions
+            {
+                AllowVersionDowngrade = true,
+            });
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(INotificationOverlay notifications)
+        {
+            notificationOverlay = notifications;
+        }
+
+        protected override async Task<bool> PerformUpdateCheck() => await checkForUpdateAsync().ConfigureAwait(false);
+
+        private async Task<bool> checkForUpdateAsync()
+        {
+            // whether to check again in 30 minutes. generally only if there's an error or no update was found (yet).
+            bool scheduleRecheck = false;
+
+            try
+            {
+                // Avoid any kind of update checking while gameplay is running.
+                if (isInGameplay)
+                {
+                    scheduleRecheck = true;
+                    return true;
+                }
+
+                // TODO: we should probably be checking if there's a more recent update, rather than shortcutting here.
+                // Velopack does support this scenario (see https://github.com/ppy/osu/pull/28743#discussion_r1743495975).
+                if (pendingUpdate != null)
+                {
+                    // If there is an update pending restart, show the notification to restart again.
+                    notificationOverlay.Post(new UpdateApplicationCompleteNotification
+                    {
+                        Activated = () =>
+                        {
+                            Task.Run(restartToApplyUpdate);
+                            return true;
+                        }
+                    });
+
+                    return true;
+                }
+
+                pendingUpdate = await updateManager.CheckForUpdatesAsync().ConfigureAwait(false);
+
+                // No update is available. We'll check again later.
+                if (pendingUpdate == null)
+                {
+                    scheduleRecheck = true;
+                    return false;
+                }
+
+                // An update is found, let's notify the user and start downloading it.
+                UpdateProgressNotification notification = new UpdateProgressNotification
+                {
+                    CompletionClickAction = () =>
+                    {
+                        Task.Run(restartToApplyUpdate);
+                        return true;
+                    },
+                };
+
+                runOutsideOfGameplay(() => notificationOverlay.Post(notification));
+                notification.StartDownload();
+
+                try
+                {
+                    await updateManager.DownloadUpdatesAsync(pendingUpdate, p => notification.Progress = p / 100f).ConfigureAwait(false);
+                    runOutsideOfGameplay(() => notification.State = ProgressNotificationState.Completed);
+                }
+                catch (Exception e)
+                {
+                    // In the case of an error, a separate notification will be displayed.
+                    scheduleRecheck = true;
+                    notification.FailDownload();
+                    Logger.Error(e, @"update failed!");
+                }
+            }
+            catch (Exception e)
+            {
+                // we'll ignore this and retry later. can be triggered by no internet connection or thread abortion.
+                scheduleRecheck = true;
+                Logger.Log($@"update check failed ({e.Message})");
+            }
+            finally
+            {
+                if (scheduleRecheck)
+                {
+                    Scheduler.AddDelayed(() => Task.Run(async () => await checkForUpdateAsync().ConfigureAwait(false)), 60000 * 30);
+                }
+            }
+
+            return true;
+        }
+
+        private void runOutsideOfGameplay(Action action)
+        {
+            if (isInGameplay)
+            {
+                Scheduler.AddDelayed(() => runOutsideOfGameplay(action), 1000);
+                return;
+            }
+
+            action();
+        }
+
+        private async Task restartToApplyUpdate()
+        {
+            await updateManager.WaitExitThenApplyUpdatesAsync(pendingUpdate?.TargetFullRelease).ConfigureAwait(false);
+            Schedule(() => game.AttemptExit());
+        }
+    }
+}

osu.Desktop/Windows/GameplayWinKeyBlocker.cs

@@ -13,7 +13,7 @@ namespace osu.Desktop.Windows
     public partial class GameplayWinKeyBlocker : Component
     {
         private Bindable<bool> disableWinKey = null!;
-        private IBindable<bool> localUserPlaying = null!;
+        private IBindable<LocalUserPlayingState> localUserPlaying = null!;
         private IBindable<bool> isActive = null!;
 
         [Resolved]
@@ -22,7 +22,7 @@ namespace osu.Desktop.Windows
         [BackgroundDependencyLoader]
         private void load(ILocalUserPlayInfo localUserInfo, OsuConfigManager config)
         {
-            localUserPlaying = localUserInfo.IsPlaying.GetBoundCopy();
+            localUserPlaying = localUserInfo.PlayingState.GetBoundCopy();
             localUserPlaying.BindValueChanged(_ => updateBlocking());
 
             isActive = host.IsActive.GetBoundCopy();
@@ -34,7 +34,7 @@ namespace osu.Desktop.Windows
 
         private void updateBlocking()
         {
-            bool shouldDisable = isActive.Value && disableWinKey.Value && localUserPlaying.Value;
+            bool shouldDisable = isActive.Value && disableWinKey.Value && localUserPlaying.Value == LocalUserPlayingState.Playing;
 
             if (shouldDisable)
                 host.InputThread.Scheduler.Add(WindowsKey.Disable);

osu.Desktop/Windows/Icons.cs

@@ -13,5 +13,7 @@ namespace osu.Desktop.Windows
         private static readonly string icon_directory = Path.GetDirectoryName(typeof(Icons).Assembly.Location)!;
 
         public static string Lazer => Path.Join(icon_directory, "lazer.ico");
+
+        public static string Beatmap => Path.Join(icon_directory, "beatmap.ico");
     }
 }

osu.Desktop/Windows/WindowsAssociationManager.cs

@@ -40,10 +40,10 @@ namespace osu.Desktop.Windows
 
         private static readonly FileAssociation[] file_associations =
         {
-            new FileAssociation(@".osz", WindowsAssociationManagerStrings.OsuBeatmap, Icons.Lazer),
-            new FileAssociation(@".olz", WindowsAssociationManagerStrings.OsuBeatmap, Icons.Lazer),
-            new FileAssociation(@".osr", WindowsAssociationManagerStrings.OsuReplay, Icons.Lazer),
-            new FileAssociation(@".osk", WindowsAssociationManagerStrings.OsuSkin, Icons.Lazer),
+            new FileAssociation(@".osz", WindowsAssociationManagerStrings.OsuBeatmap, Icons.Beatmap),
+            new FileAssociation(@".olz", WindowsAssociationManagerStrings.OsuBeatmap, Icons.Beatmap),
+            new FileAssociation(@".osr", WindowsAssociationManagerStrings.OsuReplay, Icons.Beatmap),
+            new FileAssociation(@".osk", WindowsAssociationManagerStrings.OsuSkin, Icons.Beatmap),
         };
 
         private static readonly UriAssociation[] uri_associations =

osu.Desktop/osu.Desktop.csproj

@@ -5,6 +5,7 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Description>A free-to-win rhythm game. Rhythm is just a *click* away!</Description>
     <AssemblyName>osu!</AssemblyName>
+    <AssemblyTitle>osu!(lazer)</AssemblyTitle>
     <Title>osu!</Title>
     <Product>osu!(lazer)</Product>
     <ApplicationIcon>lazer.ico</ApplicationIcon>
@@ -23,9 +24,9 @@
     <ProjectReference Include="..\osu.Game.Rulesets.Taiko\osu.Game.Rulesets.Taiko.csproj" />
   </ItemGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="Clowd.Squirrel" Version="2.11.1" />
-    <PackageReference Include="System.IO.Packaging" Version="8.0.0" />
+    <PackageReference Include="System.IO.Packaging" Version="8.0.1" />
     <PackageReference Include="DiscordRichPresence" Version="1.2.1.24" />
+    <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.Tests/TestSceneCatchPlayerLegacySkin.cs

@@ -23,7 +23,7 @@ namespace osu.Game.Rulesets.Catch.Tests
             if (withModifiedSkin)
             {
                 AddStep("change component scale", () => Player.ChildrenOfType<LegacyScoreCounter>().First().Scale = new Vector2(2f));
-                AddStep("update target", () => Player.ChildrenOfType<SkinComponentsContainer>().ForEach(LegacySkin.UpdateDrawableTarget));
+                AddStep("update target", () => Player.ChildrenOfType<SkinnableContainer>().ForEach(LegacySkin.UpdateDrawableTarget));
                 AddStep("exit player", () => Player.Exit());
                 CreateTest();
             }

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();
@@ -254,5 +274,7 @@ namespace osu.Game.Rulesets.Catch
 
             return adjustedDifficulty;
         }
+
+        public override bool EditorShowScrollSpeed => false;
     }
 }

osu.Game.Rulesets.Catch/CatchSkinComponentLookup.cs

@@ -5,7 +5,7 @@ using osu.Game.Skinning;
 
 namespace osu.Game.Rulesets.Catch
 {
-    public class CatchSkinComponentLookup : GameplaySkinComponentLookup<CatchSkinComponents>
+    public class CatchSkinComponentLookup : SkinComponentLookup<CatchSkinComponents>
     {
         public CatchSkinComponentLookup(CatchSkinComponents component)
             : base(component)

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;
@@ -20,7 +19,7 @@ namespace osu.Game.Rulesets.Catch.Difficulty
 {
     public class CatchDifficultyCalculator : DifficultyCalculator
     {
-        private const double star_scaling_factor = 0.153;
+        private const double difficulty_multiplier = 4.59;
 
         private float halfCatcherWidth;
 
@@ -41,10 +40,10 @@ namespace osu.Game.Rulesets.Catch.Difficulty
 
             CatchDifficultyAttributes attributes = new CatchDifficultyAttributes
             {
-                StarRating = Math.Sqrt(skills[0].DifficultyValue()) * star_scaling_factor,
+                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/Difficulty/Skills/Movement.cs

@@ -15,7 +15,7 @@ namespace osu.Game.Rulesets.Catch.Difficulty.Skills
         private const float normalized_hitobject_radius = 41.0f;
         private const double direction_change_bonus = 21.0;
 
-        protected override double SkillMultiplier => 900;
+        protected override double SkillMultiplier => 1;
         protected override double StrainDecayBase => 0.2;
 
         protected override double DecayWeight => 0.94;

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/CatchDistanceSnapProvider.cs

@@ -18,7 +18,9 @@ namespace osu.Game.Rulesets.Catch.Edit
             // The implementation below is probably correct but should be checked if/when exposed via controls.
 
             float expectedDistance = DurationToDistance(before, after.StartTime - before.GetEndTime());
-            float actualDistance = Math.Abs(((CatchHitObject)before).EffectiveX - ((CatchHitObject)after).EffectiveX);
+
+            float previousEndX = (before as JuiceStream)?.EndX ?? ((CatchHitObject)before).EffectiveX;
+            float actualDistance = Math.Abs(previousEndX - ((CatchHitObject)after).EffectiveX);
 
             return actualDistance / expectedDistance;
         }

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)))
-                            .Then().ScaleTo(HitObject.Scale * end_scale, HitObject.TimePreempt);
+            startScale = end_scale + random_scale_range * RandomSingle(3);
+            endScale = end_scale;
 
-            ScalingContainer.RotateTo(getRandomAngle(1))
-                            .Then()
-                            .RotateTo(getRandomAngle(2), HitObject.TimePreempt);
+            startAngle = getRandomAngle(1);
+            endAngle = getRandomAngle(2);
 
             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
-            float startRotation = RandomSingle(1) * 20;
-            double duration = HitObject.TimePreempt + 2000;
+            // Important to have this in UpdateInitialTransforms() to it is re-triggered by RefreshStateTransforms().
+            startRotation = RandomSingle(1) * 20;
+        }
 
-            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.Catch/Replays/CatchAutoGenerator.cs

@@ -16,9 +16,12 @@ namespace osu.Game.Rulesets.Catch.Replays
     {
         public new CatchBeatmap Beatmap => (CatchBeatmap)base.Beatmap;
 
+        private readonly float halfCatcherWidth;
+
         public CatchAutoGenerator(IBeatmap beatmap)
             : base(beatmap)
         {
+            halfCatcherWidth = Catcher.CalculateCatchWidth(beatmap.Difficulty) * 0.5f;
         }
 
         protected override void GenerateFrames()
@@ -47,10 +50,7 @@ namespace osu.Game.Rulesets.Catch.Replays
                 bool dashRequired = speedRequired > Catcher.BASE_WALK_SPEED;
                 bool impossibleJump = speedRequired > Catcher.BASE_DASH_SPEED;
 
-                // todo: get correct catcher size, based on difficulty CS.
-                const float catcher_width_half = Catcher.BASE_SIZE * 0.3f * 0.5f;
-
-                if (lastPosition - catcher_width_half < h.EffectiveX && lastPosition + catcher_width_half > h.EffectiveX)
+                if (lastPosition - halfCatcherWidth < h.EffectiveX && lastPosition + halfCatcherWidth > h.EffectiveX)
                 {
                     // we are already in the correct range.
                     lastTime = h.StartTime;

osu.Game.Rulesets.Catch/Skinning/Legacy/CatchLegacySkinTransformer.cs

@@ -30,23 +30,19 @@ namespace osu.Game.Rulesets.Catch.Skinning.Legacy
         {
             switch (lookup)
             {
-                case SkinComponentsContainerLookup containerLookup:
+                case GlobalSkinnableContainerLookup containerLookup:
                     // Only handle per ruleset defaults here.
                     if (containerLookup.Ruleset == null)
                         return base.GetDrawableComponent(lookup);
 
-                    // Skin has configuration.
-                    if (base.GetDrawableComponent(lookup) is UserConfiguredLayoutContainer d)
-                        return d;
-
                     // we don't have enough assets to display these components (this is especially the case on a "beatmap" skin).
                     if (!IsProvidingLegacyResources)
                         return null;
 
                     // Our own ruleset components default.
-                    switch (containerLookup.Target)
+                    switch (containerLookup.Lookup)
                     {
-                        case SkinComponentsContainerLookup.TargetArea.MainHUDComponents:
+                        case GlobalSkinnableContainers.MainHUDComponents:
                             // todo: remove CatchSkinComponents.CatchComboCounter and refactor LegacyCatchComboCounter to be added here instead.
                             return new DefaultSkinComponentsContainer(container =>
                             {
@@ -56,10 +52,8 @@ namespace osu.Game.Rulesets.Catch.Skinning.Legacy
                                 {
                                     // set the anchor to top right so that it won't squash to the return button to the top
                                     keyCounter.Anchor = Anchor.CentreRight;
-                                    keyCounter.Origin = Anchor.CentreRight;
-                                    keyCounter.X = 0;
-                                    // 340px is the default height inherit from stable
-                                    keyCounter.Y = container.ToLocalSpace(new Vector2(0, container.ScreenSpaceDrawQuad.Centre.Y - 340f)).Y;
+                                    keyCounter.Origin = Anchor.TopRight;
+                                    keyCounter.Position = new Vector2(0, -40) * 1.6f;
                                 }
                             })
                             {

osu.Game.Rulesets.Catch/Skinning/Legacy/LegacyCatchHitObjectPiece.cs

@@ -85,9 +85,25 @@ namespace osu.Game.Rulesets.Catch.Skinning.Legacy
 
         protected void SetTexture(Texture? texture, Texture? overlayTexture)
         {
-            colouredSprite.Texture = texture;
-            overlaySprite.Texture = overlayTexture;
-            hyperSprite.Texture = texture;
+            // Sizes are reset due to an arguable osu!framework bug where Sprite retains the size of the first set texture.
+
+            if (colouredSprite.Texture != texture)
+            {
+                colouredSprite.Size = Vector2.Zero;
+                colouredSprite.Texture = texture;
+            }
+
+            if (overlaySprite.Texture != overlayTexture)
+            {
+                overlaySprite.Size = Vector2.Zero;
+                overlaySprite.Texture = overlayTexture;
+            }
+
+            if (hyperSprite.Texture != texture)
+            {
+                hyperSprite.Size = Vector2.Zero;
+                hyperSprite.Texture = texture;
+            }
         }
     }
 }

osu.Game.Rulesets.Catch/UI/CatcherArea.cs

@@ -110,9 +110,9 @@ namespace osu.Game.Rulesets.Catch.UI
 
             if (Catcher.Dashing || Catcher.HyperDashing)
             {
-                double generationInterval = Catcher.HyperDashing ? 25 : 50;
+                const double trail_generation_interval = 16;
 
-                if (Time.Current - catcherTrails.LastDashTrailTime >= generationInterval)
+                if (Time.Current - catcherTrails.LastDashTrailTime >= trail_generation_interval)
                     displayCatcherTrail(Catcher.HyperDashing ? CatcherTrailAnimation.HyperDashing : CatcherTrailAnimation.Dashing);
             }
 

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.Tests/Skinning/ManiaSkinnableTestScene.cs

@@ -21,7 +21,7 @@ namespace osu.Game.Rulesets.Mania.Tests.Skinning
     public abstract partial class ManiaSkinnableTestScene : SkinnableTestScene
     {
         [Cached(Type = typeof(IScrollingInfo))]
-        private readonly TestScrollingInfo scrollingInfo = new TestScrollingInfo();
+        protected readonly TestScrollingInfo ScrollingInfo = new TestScrollingInfo();
 
         [Cached]
         private readonly StageDefinition stage = new StageDefinition(4);
@@ -30,7 +30,7 @@ namespace osu.Game.Rulesets.Mania.Tests.Skinning
 
         protected ManiaSkinnableTestScene()
         {
-            scrollingInfo.Direction.Value = ScrollingDirection.Down;
+            ScrollingInfo.Direction.Value = ScrollingDirection.Down;
 
             Add(new Box
             {
@@ -43,16 +43,16 @@ namespace osu.Game.Rulesets.Mania.Tests.Skinning
         [Test]
         public void TestScrollingDown()
         {
-            AddStep("change direction to down", () => scrollingInfo.Direction.Value = ScrollingDirection.Down);
+            AddStep("change direction to down", () => ScrollingInfo.Direction.Value = ScrollingDirection.Down);
         }
 
         [Test]
         public void TestScrollingUp()
         {
-            AddStep("change direction to up", () => scrollingInfo.Direction.Value = ScrollingDirection.Up);
+            AddStep("change direction to up", () => ScrollingInfo.Direction.Value = ScrollingDirection.Up);
         }
 
-        private class TestScrollingInfo : IScrollingInfo
+        protected class TestScrollingInfo : IScrollingInfo
         {
             public readonly Bindable<ScrollingDirection> Direction = new Bindable<ScrollingDirection>();
 

osu.Game.Rulesets.Mania.Tests/Skinning/TestSceneComboCounter.cs

@@ -1,13 +1,17 @@
 // 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.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
 using osu.Framework.Testing;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Mania.Skinning.Argon;
 using osu.Game.Rulesets.Mania.Skinning.Legacy;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Scoring;
+using osu.Game.Rulesets.UI.Scrolling;
 using osu.Game.Skinning;
 
 namespace osu.Game.Rulesets.Mania.Tests.Skinning
@@ -17,22 +21,75 @@ namespace osu.Game.Rulesets.Mania.Tests.Skinning
         [Cached]
         private ScoreProcessor scoreProcessor = new ScoreProcessor(new ManiaRuleset());
 
-        [SetUpSteps]
-        public void SetUpSteps()
+        [Test]
+        public void TestDisplay()
         {
-            AddStep("setup", () => SetContents(s =>
-            {
-                if (s is ArgonSkin)
-                    return new ArgonManiaComboCounter();
-
-                if (s is LegacySkin)
-                    return new LegacyManiaComboCounter();
-
-                return new LegacyManiaComboCounter();
-            }));
-
+            setup(Anchor.Centre);
             AddRepeatStep("perform hit", () => scoreProcessor.ApplyResult(new JudgementResult(new HitObject(), new Judgement()) { Type = HitResult.Great }), 20);
             AddStep("perform miss", () => scoreProcessor.ApplyResult(new JudgementResult(new HitObject(), new Judgement()) { Type = HitResult.Miss }));
         }
+
+        [Test]
+        public void TestAnchorOrigin()
+        {
+            AddStep("set direction down", () => ScrollingInfo.Direction.Value = ScrollingDirection.Down);
+            setup(Anchor.TopCentre, 20);
+            AddStep("set direction up", () => ScrollingInfo.Direction.Value = ScrollingDirection.Up);
+            check(Anchor.BottomCentre, -20);
+
+            AddStep("set direction up", () => ScrollingInfo.Direction.Value = ScrollingDirection.Up);
+            setup(Anchor.BottomCentre, -20);
+            AddStep("set direction down", () => ScrollingInfo.Direction.Value = ScrollingDirection.Down);
+            check(Anchor.TopCentre, 20);
+
+            AddStep("set direction down", () => ScrollingInfo.Direction.Value = ScrollingDirection.Down);
+            setup(Anchor.Centre, 20);
+            AddStep("set direction up", () => ScrollingInfo.Direction.Value = ScrollingDirection.Up);
+            check(Anchor.Centre, 20);
+
+            AddStep("set direction up", () => ScrollingInfo.Direction.Value = ScrollingDirection.Up);
+            setup(Anchor.Centre, -20);
+            AddStep("set direction down", () => ScrollingInfo.Direction.Value = ScrollingDirection.Down);
+            check(Anchor.Centre, -20);
+        }
+
+        private void setup(Anchor anchor, float y = 0)
+        {
+            AddStep($"setup {anchor} {y}", () => SetContents(s =>
+            {
+                var container = new Container
+                {
+                    RelativeSizeAxes = Axes.Both,
+                };
+
+                if (s is ArgonSkin)
+                    container.Add(new ArgonManiaComboCounter());
+                else if (s is LegacySkin)
+                    container.Add(new LegacyManiaComboCounter());
+                else
+                    container.Add(new LegacyManiaComboCounter());
+
+                container.Child.Anchor = anchor;
+                container.Child.Origin = Anchor.Centre;
+                container.Child.Y = y;
+
+                return container;
+            }));
+        }
+
+        private void check(Anchor anchor, float y)
+        {
+            AddAssert($"check {anchor} {y}", () =>
+            {
+                foreach (var combo in this.ChildrenOfType<ISerialisableDrawable>())
+                {
+                    var drawableCombo = (Drawable)combo;
+                    if (drawableCombo.Anchor != anchor || drawableCombo.Y != y)
+                        return false;
+                }
+
+                return true;
+            });
+        }
     }
 }

osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs

@@ -6,7 +6,6 @@ using System;
 using System.Linq;
 using System.Collections.Generic;
 using System.Threading;
-using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
@@ -271,7 +270,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
                         Duration = endTimeData.Duration,
                         Column = column,
                         Samples = HitObject.Samples,
-                        NodeSamples = (HitObject as IHasRepeats)?.NodeSamples ?? defaultNodeSamples
+                        NodeSamples = (HitObject as IHasRepeats)?.NodeSamples ?? HoldNote.CreateDefaultNodeSamples(HitObject)
                     });
                 }
                 else if (HitObject is IHasXPosition)
@@ -286,16 +285,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
 
                 return pattern;
             }
-
-            /// <remarks>
-            /// osu!mania-specific beatmaps in stable only play samples at the start of the hold note.
-            /// </remarks>
-            private List<IList<HitSampleInfo>> defaultNodeSamples
-                => new List<IList<HitSampleInfo>>
-                {
-                    HitObject.Samples,
-                    new List<HitSampleInfo>()
-                };
         }
     }
 }

osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyCalculator.cs

@@ -24,12 +24,12 @@ namespace osu.Game.Rulesets.Mania.Difficulty
 {
     public class ManiaDifficultyCalculator : DifficultyCalculator
     {
-        private const double star_scaling_factor = 0.018;
+        private const double difficulty_multiplier = 0.018;
 
         private readonly bool isForCurrentRuleset;
         private readonly double originalOverallDifficulty;
 
-        public override int Version => 20230817;
+        public override int Version => 20241007;
 
         public ManiaDifficultyCalculator(IRulesetInfo ruleset, IWorkingBeatmap beatmap)
             : base(ruleset, beatmap)
@@ -48,7 +48,7 @@ namespace osu.Game.Rulesets.Mania.Difficulty
 
             ManiaDifficultyAttributes attributes = new ManiaDifficultyAttributes
             {
-                StarRating = skills[0].DifficultyValue() * star_scaling_factor,
+                StarRating = skills[0].DifficultyValue() * difficulty_multiplier,
                 Mods = mods,
                 // In osu-stable mania, rate-adjustment mods don't affect the hit window.
                 // This is done the way it is to introduce fractional differences in order to match osu-stable for the time being.

osu.Game.Rulesets.Mania/Difficulty/ManiaPerformanceCalculator.cs

@@ -38,9 +38,7 @@ namespace osu.Game.Rulesets.Mania.Difficulty
             countMiss = score.Statistics.GetValueOrDefault(HitResult.Miss);
             scoreAccuracy = calculateCustomAccuracy();
 
-            // Arbitrary initial value for scaling pp in order to standardize distributions across game modes.
-            // The specific number has no intrinsic meaning and can be adjusted as needed.
-            double multiplier = 8.0;
+            double multiplier = 1.0;
 
             if (score.Mods.Any(m => m is ModNoFail))
                 multiplier *= 0.75;
@@ -59,9 +57,9 @@ namespace osu.Game.Rulesets.Mania.Difficulty
 
         private double computeDifficultyValue(ManiaDifficultyAttributes attributes)
         {
-            double difficultyValue = Math.Pow(Math.Max(attributes.StarRating - 0.15, 0.05), 2.2) // Star rating to pp curve
-                                     * Math.Max(0, 5 * scoreAccuracy - 4) // From 80% accuracy, 1/20th of total pp is awarded per additional 1% accuracy
-                                     * (1 + 0.1 * Math.Min(1, totalHits / 1500)); // Length bonus, capped at 1500 notes
+            double difficultyValue = 8.0 * Math.Pow(Math.Max(attributes.StarRating - 0.15, 0.05), 2.2) // Star rating to pp curve
+                                         * Math.Max(0, 5 * scoreAccuracy - 4) // From 80% accuracy, 1/20th of total pp is awarded per additional 1% accuracy
+                                         * (1 + 0.1 * Math.Min(1, totalHits / 1500)); // Length bonus, capped at 1500 notes
 
             return difficultyValue;
         }

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 LabelledSwitchButton specialStyle { get; set; } = null!;
-        private LabelledSliderBar<float> healthDrainSlider { get; set; } = null!;
-        private LabelledSliderBar<float> overallDifficultySlider { get; set; } = null!;
-        private LabelledSliderBar<double> baseVelocitySlider { get; set; } = null!;
-        private LabelledSliderBar<double> tickRateSlider { get; set; } = null!;
+        private FormSliderBar<float> keyCountSlider { get; set; } = null!;
+        private FormCheckBox specialStyle { get; set; } = null!;
+        private FormSliderBar<float> healthDrainSlider { get; set; } = null!;
+        private FormSliderBar<float> overallDifficultySlider { get; set; } = null!;
+        private FormSliderBar<double> baseVelocitySlider { 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,
-                    FixedLabelWidth = LABEL_WIDTH,
-                    Description = "The number of columns in the beatmap",
+                    Caption = BeatmapsetsStrings.ShowStatsCsMania,
+                    HintText = "The number of columns in the beatmap",
                     Current = new BindableFloat(Beatmap.Difficulty.CircleSize)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 1,
-                    }
+                    },
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
                 },
-                specialStyle = new LabelledSwitchButton
+                specialStyle = new FormCheckBox
                 {
-                    Label = "Use special (N+1) style",
-                    FixedLabelWidth = LABEL_WIDTH,
-                    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.",
+                    Caption = "Use special (N+1) style",
+                    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.",
                     Current = { Value = Beatmap.BeatmapInfo.SpecialStyle }
                 },
-                healthDrainSlider = new LabelledSliderBar<float>
+                healthDrainSlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsDrain,
-                    FixedLabelWidth = LABEL_WIDTH,
-                    Description = EditorSetupStrings.DrainRateDescription,
+                    Caption = BeatmapsetsStrings.ShowStatsDrain,
+                    HintText = EditorSetupStrings.DrainRateDescription,
                     Current = new BindableFloat(Beatmap.Difficulty.DrainRate)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 0.1f,
-                    }
+                    },
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
                 },
-                overallDifficultySlider = new LabelledSliderBar<float>
+                overallDifficultySlider = new FormSliderBar<float>
                 {
-                    Label = BeatmapsetsStrings.ShowStatsAccuracy,
-                    FixedLabelWidth = LABEL_WIDTH,
-                    Description = EditorSetupStrings.OverallDifficultyDescription,
+                    Caption = BeatmapsetsStrings.ShowStatsAccuracy,
+                    HintText = EditorSetupStrings.OverallDifficultyDescription,
                     Current = new BindableFloat(Beatmap.Difficulty.OverallDifficulty)
                     {
                         Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
                         MinValue = 0,
                         MaxValue = 10,
                         Precision = 0.1f,
-                    }
+                    },
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
                 },
-                baseVelocitySlider = new LabelledSliderBar<double>
+                baseVelocitySlider = new FormSliderBar<double>
                 {
-                    Label = EditorSetupStrings.BaseVelocity,
-                    FixedLabelWidth = LABEL_WIDTH,
-                    Description = EditorSetupStrings.BaseVelocityDescription,
+                    Caption = EditorSetupStrings.BaseVelocity,
+                    HintText = EditorSetupStrings.BaseVelocityDescription,
                     Current = new BindableDouble(Beatmap.Difficulty.SliderMultiplier)
                     {
                         Default = 1.4,
                         MinValue = 0.4,
                         MaxValue = 3.6,
                         Precision = 0.01f,
-                    }
+                    },
+                    TransferValueOnCommit = true,
+                    TabbableContentContainer = this,
                 },
-                tickRateSlider = new LabelledSliderBar<double>
+                tickRateSlider = new FormSliderBar<double>
                 {
-                    Label = EditorSetupStrings.TickRate,
-                    FixedLabelWidth = LABEL_WIDTH,
-                    Description = EditorSetupStrings.TickRateDescription,
+                    Caption = EditorSetupStrings.TickRate,
+                    HintText = 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.Mania/ManiaSkinComponentLookup.cs

@@ -5,7 +5,7 @@ using osu.Game.Skinning;
 
 namespace osu.Game.Rulesets.Mania
 {
-    public class ManiaSkinComponentLookup : GameplaySkinComponentLookup<ManiaSkinComponents>
+    public class ManiaSkinComponentLookup : SkinComponentLookup<ManiaSkinComponents>
     {
         /// <summary>
         /// Creates a new <see cref="ManiaSkinComponentLookup"/>.

osu.Game.Rulesets.Mania/Objects/HoldNote.cs

@@ -7,6 +7,7 @@ using System.Collections.Generic;
 using System.Threading;
 using osu.Game.Audio;
 using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Scoring;
 
@@ -91,6 +92,10 @@ namespace osu.Game.Rulesets.Mania.Objects
         {
             base.CreateNestedHitObjects(cancellationToken);
 
+            // Generally node samples will be populated by ManiaBeatmapConverter, but in a case like the editor they may not be.
+            // Ensure they are set to a sane default here.
+            NodeSamples ??= CreateDefaultNodeSamples(this);
+
             AddNested(Head = new HeadNote
             {
                 StartTime = StartTime,
@@ -102,7 +107,7 @@ namespace osu.Game.Rulesets.Mania.Objects
             {
                 StartTime = EndTime,
                 Column = Column,
-                Samples = GetNodeSamples((NodeSamples?.Count - 1) ?? 1),
+                Samples = GetNodeSamples(NodeSamples.Count - 1),
             });
 
             AddNested(Body = new HoldNoteBody
@@ -116,7 +121,20 @@ namespace osu.Game.Rulesets.Mania.Objects
 
         protected override HitWindows CreateHitWindows() => HitWindows.Empty;
 
-        public IList<HitSampleInfo> GetNodeSamples(int nodeIndex) =>
-            nodeIndex < NodeSamples?.Count ? NodeSamples[nodeIndex] : Samples;
+        public IList<HitSampleInfo> GetNodeSamples(int nodeIndex) => nodeIndex < NodeSamples?.Count ? NodeSamples[nodeIndex] : Samples;
+
+        /// <summary>
+        /// Create the default note samples for a hold note, based off their main sample.
+        /// </summary>
+        /// <remarks>
+        /// By default, osu!mania beatmaps in only play samples at the start of the hold note.
+        /// </remarks>
+        /// <param name="obj">The object to use as a basis for the head sample.</param>
+        /// <returns>Defaults for assigning to <see cref="HoldNote.NodeSamples"/>.</returns>
+        public static List<IList<HitSampleInfo>> CreateDefaultNodeSamples(HitObject obj) => new List<IList<HitSampleInfo>>
+        {
+            obj.Samples,
+            new List<HitSampleInfo>(),
+        };
     }
 }

osu.Game.Rulesets.Mania/Skinning/Argon/ArgonManiaComboCounter.cs

@@ -38,11 +38,11 @@ namespace osu.Game.Rulesets.Mania.Skinning.Argon
         private void updateAnchor()
         {
             // if the anchor isn't a vertical center, set top or bottom anchor based on scroll direction
-            if (!Anchor.HasFlag(Anchor.y1))
-            {
-                Anchor &= ~(Anchor.y0 | Anchor.y2);
-                Anchor |= direction.Value == ScrollingDirection.Up ? Anchor.y2 : Anchor.y0;
-            }
+            if (Anchor.HasFlag(Anchor.y1))
+                return;
+
+            Anchor &= ~(Anchor.y0 | Anchor.y2);
+            Anchor |= direction.Value == ScrollingDirection.Up ? Anchor.y2 : Anchor.y0;
 
             // change the sign of the Y coordinate in line with the scrolling direction.
             // i.e. if the user changes direction from down to up, the anchor is changed from top to bottom, and the Y is flipped from positive to negative here.

osu.Game.Rulesets.Mania/Skinning/Argon/ManiaArgonSkinTransformer.cs

@@ -28,18 +28,14 @@ namespace osu.Game.Rulesets.Mania.Skinning.Argon
         {
             switch (lookup)
             {
-                case SkinComponentsContainerLookup containerLookup:
+                case GlobalSkinnableContainerLookup containerLookup:
                     // Only handle per ruleset defaults here.
                     if (containerLookup.Ruleset == null)
                         return base.GetDrawableComponent(lookup);
 
-                    // Skin has configuration.
-                    if (base.GetDrawableComponent(lookup) is UserConfiguredLayoutContainer d)
-                        return d;
-
-                    switch (containerLookup.Target)
+                    switch (containerLookup.Lookup)
                     {
-                        case SkinComponentsContainerLookup.TargetArea.MainHUDComponents:
+                        case GlobalSkinnableContainers.MainHUDComponents:
                             return new DefaultSkinComponentsContainer(container =>
                             {
                                 var combo = container.ChildrenOfType<ArgonManiaComboCounter>().FirstOrDefault();
@@ -59,7 +55,7 @@ namespace osu.Game.Rulesets.Mania.Skinning.Argon
 
                     return null;
 
-                case GameplaySkinComponentLookup<HitResult> resultComponent:
+                case SkinComponentLookup<HitResult> resultComponent:
                     // This should eventually be moved to a skin setting, when supported.
                     if (Skin is ArgonProSkin && resultComponent.Component >= HitResult.Great)
                         return Drawable.Empty();

osu.Game.Rulesets.Mania/Skinning/Legacy/LegacyManiaComboCounter.cs

@@ -1,9 +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;
+using System.Globalization;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI.Scrolling;
 using osu.Game.Skinning;
 using osuTK;
@@ -11,17 +15,76 @@ using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Mania.Skinning.Legacy
 {
-    public partial class LegacyManiaComboCounter : LegacyComboCounter
+    public partial class LegacyManiaComboCounter : CompositeDrawable, ISerialisableDrawable
     {
-        [BackgroundDependencyLoader]
-        private void load(ISkinSource skin)
-        {
-            DisplayedCountText.Anchor = Anchor.Centre;
-            DisplayedCountText.Origin = Anchor.Centre;
+        public bool UsesFixedAnchor { get; set; }
 
-            PopOutCountText.Anchor = Anchor.Centre;
-            PopOutCountText.Origin = Anchor.Centre;
-            PopOutCountText.Colour = skin.GetManiaSkinConfig<Color4>(LegacyManiaSkinConfigurationLookups.ComboBreakColour)?.Value ?? Color4.Red;
+        public Bindable<int> Current { get; } = new BindableInt { MinValue = 0 };
+
+        /// <summary>
+        /// Value shown at the current moment.
+        /// </summary>
+        public virtual int DisplayedCount
+        {
+            get => displayedCount;
+            private set
+            {
+                if (displayedCount.Equals(value))
+                    return;
+
+                displayedCountText.FadeTo(value == 0 ? 0 : 1);
+                displayedCountText.Text = value.ToString(CultureInfo.InvariantCulture);
+                counterContainer.Size = displayedCountText.Size;
+
+                displayedCount = value;
+            }
+        }
+
+        private int displayedCount;
+
+        private int previousValue;
+
+        private const double fade_out_duration = 100;
+        private const double rolling_duration = 20;
+
+        private Container counterContainer = null!;
+        private LegacySpriteText popOutCountText = null!;
+        private LegacySpriteText displayedCountText = null!;
+
+        [BackgroundDependencyLoader]
+        private void load(ISkinSource skin, ScoreProcessor scoreProcessor)
+        {
+            AutoSizeAxes = Axes.Both;
+
+            InternalChildren = new[]
+            {
+                counterContainer = new Container
+                {
+                    AlwaysPresent = true,
+                    Children = new[]
+                    {
+                        popOutCountText = new LegacySpriteText(LegacyFont.Combo)
+                        {
+                            Alpha = 0,
+                            Blending = BlendingParameters.Additive,
+                            BypassAutoSizeAxes = Axes.Both,
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                            Colour = skin.GetManiaSkinConfig<Color4>(LegacyManiaSkinConfigurationLookups.ComboBreakColour)?.Value ?? Color4.Red,
+                        },
+                        displayedCountText = new LegacySpriteText(LegacyFont.Combo)
+                        {
+                            Alpha = 0,
+                            AlwaysPresent = true,
+                            BypassAutoSizeAxes = Axes.Both,
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                        },
+                    }
+                }
+            };
+
+            Current.BindTo(scoreProcessor.Combo);
         }
 
         [Resolved]
@@ -33,6 +96,12 @@ namespace osu.Game.Rulesets.Mania.Skinning.Legacy
         {
             base.LoadComplete();
 
+            displayedCountText.Text = popOutCountText.Text = Current.Value.ToString(CultureInfo.InvariantCulture);
+
+            Current.BindValueChanged(combo => updateCount(combo.NewValue == 0), true);
+
+            counterContainer.Size = displayedCountText.Size;
+
             direction = scrollingInfo.Direction.GetBoundCopy();
             direction.BindValueChanged(_ => updateAnchor());
 
@@ -44,48 +113,82 @@ namespace osu.Game.Rulesets.Mania.Skinning.Legacy
         private void updateAnchor()
         {
             // if the anchor isn't a vertical center, set top or bottom anchor based on scroll direction
-            if (!Anchor.HasFlag(Anchor.y1))
-            {
-                Anchor &= ~(Anchor.y0 | Anchor.y2);
-                Anchor |= direction.Value == ScrollingDirection.Up ? Anchor.y2 : Anchor.y0;
-            }
+            if (Anchor.HasFlag(Anchor.y1))
+                return;
 
-            // since we flip the vertical anchor when changing scroll direction,
-            // we can use the sign of the Y value as an indicator to make the combo counter displayed correctly.
-            if ((Y < 0 && direction.Value == ScrollingDirection.Down) || (Y > 0 && direction.Value == ScrollingDirection.Up))
-                Y = -Y;
+            Anchor &= ~(Anchor.y0 | Anchor.y2);
+            Anchor |= direction.Value == ScrollingDirection.Up ? Anchor.y2 : Anchor.y0;
+
+            // change the sign of the Y coordinate in line with the scrolling direction.
+            // i.e. if the user changes direction from down to up, the anchor is changed from top to bottom, and the Y is flipped from positive to negative here.
+            Y = Math.Abs(Y) * (direction.Value == ScrollingDirection.Up ? -1 : 1);
         }
 
-        protected override void OnCountIncrement()
+        private void updateCount(bool rolling)
         {
-            base.OnCountIncrement();
+            int prev = previousValue;
+            previousValue = Current.Value;
 
-            PopOutCountText.Hide();
-            DisplayedCountText.ScaleTo(new Vector2(1f, 1.4f))
+            if (!IsLoaded)
+                return;
+
+            if (!rolling)
+            {
+                FinishTransforms(false, nameof(DisplayedCount));
+
+                if (prev + 1 == Current.Value)
+                    onCountIncrement();
+                else
+                    onCountChange();
+            }
+            else
+                onCountRolling();
+        }
+
+        private void onCountIncrement()
+        {
+            popOutCountText.Hide();
+
+            DisplayedCount = Current.Value;
+            displayedCountText.ScaleTo(new Vector2(1f, 1.4f))
                               .ScaleTo(new Vector2(1f), 300, Easing.Out)
                               .FadeIn(120);
         }
 
-        protected override void OnCountChange()
+        private void onCountChange()
         {
-            base.OnCountChange();
+            popOutCountText.Hide();
 
-            PopOutCountText.Hide();
-            DisplayedCountText.ScaleTo(1f);
+            if (Current.Value == 0)
+                displayedCountText.FadeOut();
+
+            DisplayedCount = Current.Value;
+
+            displayedCountText.ScaleTo(1f);
         }
 
-        protected override void OnCountRolling()
+        private void onCountRolling()
         {
             if (DisplayedCount > 0)
             {
-                PopOutCountText.Text = FormatCount(DisplayedCount);
-                PopOutCountText.FadeTo(0.8f).FadeOut(200)
+                popOutCountText.Text = DisplayedCount.ToString(CultureInfo.InvariantCulture);
+                popOutCountText.FadeTo(0.8f).FadeOut(200)
                                .ScaleTo(1f).ScaleTo(4f, 200);
 
-                DisplayedCountText.FadeTo(0.5f, 300);
+                displayedCountText.FadeTo(0.5f, 300);
             }
 
-            base.OnCountRolling();
+            // Hides displayed count if was increasing from 0 to 1 but didn't finish
+            if (DisplayedCount == 0 && Current.Value == 0)
+                displayedCountText.FadeOut(fade_out_duration);
+
+            this.TransformTo(nameof(DisplayedCount), Current.Value, getProportionalDuration(DisplayedCount, Current.Value));
+        }
+
+        private double getProportionalDuration(int currentValue, int newValue)
+        {
+            double difference = currentValue > newValue ? currentValue - newValue : newValue - currentValue;
+            return difference * rolling_duration;
         }
     }
 }

osu.Game.Rulesets.Mania/Skinning/Legacy/ManiaLegacySkinTransformer.cs

@@ -80,22 +80,18 @@ namespace osu.Game.Rulesets.Mania.Skinning.Legacy
         {
             switch (lookup)
             {
-                case SkinComponentsContainerLookup containerLookup:
+                case GlobalSkinnableContainerLookup containerLookup:
                     // Modifications for global components.
                     if (containerLookup.Ruleset == null)
                         return base.GetDrawableComponent(lookup);
 
-                    // Skin has configuration.
-                    if (base.GetDrawableComponent(lookup) is UserConfiguredLayoutContainer d)
-                        return d;
-
                     // we don't have enough assets to display these components (this is especially the case on a "beatmap" skin).
                     if (!IsProvidingLegacyResources)
                         return null;
 
-                    switch (containerLookup.Target)
+                    switch (containerLookup.Lookup)
                     {
-                        case SkinComponentsContainerLookup.TargetArea.MainHUDComponents:
+                        case GlobalSkinnableContainers.MainHUDComponents:
                             return new DefaultSkinComponentsContainer(container =>
                             {
                                 var combo = container.ChildrenOfType<LegacyManiaComboCounter>().FirstOrDefault();
@@ -114,7 +110,7 @@ namespace osu.Game.Rulesets.Mania.Skinning.Legacy
 
                     return null;
 
-                case GameplaySkinComponentLookup<HitResult> resultComponent:
+                case SkinComponentLookup<HitResult> resultComponent:
                     return getResult(resultComponent.Component);
 
                 case ManiaSkinComponentLookup maniaComponent:

osu.Game.Rulesets.Mania/UI/ManiaTouchInputArea.cs

@@ -99,12 +99,6 @@ namespace osu.Game.Rulesets.Mania.UI
             return false;
         }
 
-        protected override bool OnMouseDown(MouseDownEvent e)
-        {
-            Show();
-            return true;
-        }
-
         protected override bool OnTouchDown(TouchDownEvent e)
         {
             Show();
@@ -172,17 +166,6 @@ namespace osu.Game.Rulesets.Mania.UI
                 updateButton(false);
             }
 
-            protected override bool OnMouseDown(MouseDownEvent e)
-            {
-                updateButton(true);
-                return false; // handled by parent container to show overlay.
-            }
-
-            protected override void OnMouseUp(MouseUpEvent e)
-            {
-                updateButton(false);
-            }
-
             private void updateButton(bool press)
             {
                 if (press == isPressed)

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/TestSceneOsuEditorGrids.cs

@@ -24,24 +24,24 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
         [Test]
         public void TestGridToggles()
         {
-            AddStep("enable distance snap grid", () => InputManager.Key(Key.T));
+            AddStep("enable distance snap grid", () => InputManager.Key(Key.Y));
             AddStep("select second object", () => EditorBeatmap.SelectedHitObjects.Add(EditorBeatmap.HitObjects.ElementAt(1)));
 
             AddUntilStep("distance snap grid visible", () => this.ChildrenOfType<OsuDistanceSnapGrid>().Any());
             gridActive<RectangularPositionSnapGrid>(false);
 
-            AddStep("enable rectangular grid", () => InputManager.Key(Key.Y));
+            AddStep("enable rectangular grid", () => InputManager.Key(Key.T));
 
             AddStep("select second object", () => EditorBeatmap.SelectedHitObjects.Add(EditorBeatmap.HitObjects.ElementAt(1)));
             AddUntilStep("distance snap grid still visible", () => this.ChildrenOfType<OsuDistanceSnapGrid>().Any());
             gridActive<RectangularPositionSnapGrid>(true);
 
-            AddStep("disable distance snap grid", () => InputManager.Key(Key.T));
+            AddStep("disable distance snap grid", () => InputManager.Key(Key.Y));
             AddUntilStep("distance snap grid hidden", () => !this.ChildrenOfType<OsuDistanceSnapGrid>().Any());
             AddStep("select second object", () => EditorBeatmap.SelectedHitObjects.Add(EditorBeatmap.HitObjects.ElementAt(1)));
             gridActive<RectangularPositionSnapGrid>(true);
 
-            AddStep("disable rectangular grid", () => InputManager.Key(Key.Y));
+            AddStep("disable rectangular grid", () => InputManager.Key(Key.T));
             AddUntilStep("distance snap grid still hidden", () => !this.ChildrenOfType<OsuDistanceSnapGrid>().Any());
             gridActive<RectangularPositionSnapGrid>(false);
         }
@@ -57,7 +57,7 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
             AddStep("release alt", () => InputManager.ReleaseKey(Key.AltLeft));
             AddUntilStep("distance snap grid hidden", () => !this.ChildrenOfType<OsuDistanceSnapGrid>().Any());
 
-            AddStep("enable distance snap grid", () => InputManager.Key(Key.T));
+            AddStep("enable distance snap grid", () => InputManager.Key(Key.Y));
             AddUntilStep("distance snap grid visible", () => this.ChildrenOfType<OsuDistanceSnapGrid>().Any());
             AddStep("hold alt", () => InputManager.PressKey(Key.AltLeft));
             AddUntilStep("distance snap grid hidden", () => !this.ChildrenOfType<OsuDistanceSnapGrid>().Any());
@@ -70,7 +70,7 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
         {
             double distanceSnap = double.PositiveInfinity;
 
-            AddStep("enable distance snap grid", () => InputManager.Key(Key.T));
+            AddStep("enable distance snap grid", () => InputManager.Key(Key.Y));
 
             AddStep("select second object", () => EditorBeatmap.SelectedHitObjects.Add(EditorBeatmap.HitObjects.ElementAt(1)));
             AddUntilStep("distance snap grid visible", () => this.ChildrenOfType<OsuDistanceSnapGrid>().Any());
@@ -170,7 +170,7 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
         [Test]
         public void TestGridSizeToggling()
         {
-            AddStep("enable rectangular grid", () => InputManager.Key(Key.Y));
+            AddStep("enable rectangular grid", () => InputManager.Key(Key.T));
             AddUntilStep("rectangular grid visible", () => this.ChildrenOfType<RectangularPositionSnapGrid>().Any());
             gridSizeIs(4);
 

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/TestSceneSliderChangeStates.cs

@@ -0,0 +1,47 @@
+// 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.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Tests.Beatmaps;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Tests.Editor
+{
+    public partial class TestSceneSliderChangeStates : TestSceneOsuEditor
+    {
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new TestBeatmap(ruleset, false);
+
+        [TestCase(SplineType.Catmull)]
+        [TestCase(SplineType.BSpline)]
+        [TestCase(SplineType.Linear)]
+        [TestCase(SplineType.PerfectCurve)]
+        public void TestSliderRetainsCurveTypes(SplineType splineType)
+        {
+            Slider? slider = null;
+            PathType pathType = new PathType(splineType);
+
+            AddStep("add slider", () => EditorBeatmap.Add(slider = new Slider
+            {
+                StartTime = 500,
+                Path = new SliderPath(new[]
+                {
+                    new PathControlPoint(Vector2.Zero, pathType),
+                    new PathControlPoint(new Vector2(200, 0), pathType),
+                })
+            }));
+            AddAssert("slider has correct spline type", () => ((Slider)EditorBeatmap.HitObjects[0]).Path.ControlPoints.All(p => p.Type == pathType));
+            AddStep("remove object", () => EditorBeatmap.Remove(slider));
+            AddAssert("slider removed", () => EditorBeatmap.HitObjects.Count == 0);
+            addUndoSteps();
+            AddAssert("slider not removed", () => EditorBeatmap.HitObjects.Count == 1);
+            AddAssert("slider has correct spline type", () => ((Slider)EditorBeatmap.HitObjects[0]).Path.ControlPoints.All(p => p.Type == pathType));
+        }
+
+        private void addUndoSteps() => AddStep("undo", () => Editor.Undo());
+    }
+}

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 DrawableSlider drawableObject;
-        private TestSliderBlueprint blueprint;
+        private Slider slider = null!;
+        private DrawableSlider drawableObject = null!;
+        private TestSliderBlueprint blueprint = null!;
 
         [SetUp]
         public void Setup() => Schedule(() =>
@@ -163,6 +161,44 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
             checkControlPointSelected(1, false);
         }
 
+        [Test]
+        public void TestAdjustLength()
+        {
+            AddStep("move mouse to drag marker", () =>
+            {
+                Vector2 position = slider.Position + slider.Path.PositionAt(1) + new Vector2(60, 0);
+                InputManager.MoveMouseTo(drawableObject.Parent!.ToScreenSpace(position));
+            });
+            AddStep("start drag", () => InputManager.PressButton(MouseButton.Left));
+            AddStep("move mouse to control point 1", () =>
+            {
+                Vector2 position = slider.Position + slider.Path.ControlPoints[1].Position + new Vector2(60, 0);
+                InputManager.MoveMouseTo(drawableObject.Parent!.ToScreenSpace(position));
+            });
+            AddStep("end adjust length", () => InputManager.ReleaseButton(MouseButton.Left));
+            AddAssert("expected distance halved",
+                () => Precision.AlmostEquals(slider.Path.Distance, 172.2, 0.1));
+
+            AddStep("move mouse to drag marker", () =>
+            {
+                Vector2 position = slider.Position + slider.Path.PositionAt(1) + new Vector2(60, 0);
+                InputManager.MoveMouseTo(drawableObject.Parent!.ToScreenSpace(position));
+            });
+            AddStep("start drag", () => InputManager.PressButton(MouseButton.Left));
+            AddStep("move mouse beyond last control point", () =>
+            {
+                Vector2 position = slider.Position + slider.Path.ControlPoints[2].Position + new Vector2(100, 0);
+                InputManager.MoveMouseTo(drawableObject.Parent!.ToScreenSpace(position));
+            });
+            AddStep("end adjust length", () => InputManager.ReleaseButton(MouseButton.Left));
+            AddAssert("expected distance is calculated distance",
+                () => Precision.AlmostEquals(slider.Path.Distance, slider.Path.CalculatedDistance, 0.1));
+
+            moveMouseToControlPoint(1);
+            AddAssert("expected distance is unchanged",
+                () => Precision.AlmostEquals(slider.Path.Distance, slider.Path.CalculatedDistance, 0.1));
+        }
+
         private void moveHitObject()
         {
             AddStep("move hitobject", () =>
@@ -180,6 +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)
@@ -192,14 +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(1.4386882251130073d, 54, "zero-length-sliders")]
-        [TestCase(0.42506480230838789d, 4, "very-fast-slider")]
-        [TestCase(0.14102693012101306d, 2, "nan-slider")]
+        [TestCase(6.7171144000821119d, 239, "diffcalc-test")]
+        [TestCase(1.4485749025771304d, 54, "zero-length-sliders")]
+        [TestCase(0.42630400627180914d, 4, "very-fast-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(1.743180218215227d, 54, "zero-length-sliders")]
-        [TestCase(0.55071082800473514d, 4, "very-fast-slider")]
+        [TestCase(8.9825709931204205d, 239, "diffcalc-test")]
+        [TestCase(1.7550169162648608d, 54, "zero-length-sliders")]
+        [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(1.4386882251130073d, 54, "zero-length-sliders")]
-        [TestCase(0.42506480230838789d, 4, "very-fast-slider")]
+        [TestCase(6.7171144000821119d, 239, "diffcalc-test")]
+        [TestCase(1.4485749025771304d, 54, "zero-length-sliders")]
+        [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.Tests/TestSceneCursorTrail.cs

@@ -88,6 +88,21 @@ namespace osu.Game.Rulesets.Osu.Tests
             AddAssert("trail is disjoint", () => this.ChildrenOfType<LegacyCursorTrail>().Single().DisjointTrail, () => Is.True);
         }
 
+        [Test]
+        public void TestClickExpand()
+        {
+            createTest(() => new Container
+            {
+                RelativeSizeAxes = Axes.Both,
+                Scale = new Vector2(10),
+                Child = new CursorTrail(),
+            });
+
+            AddStep("expand", () => this.ChildrenOfType<CursorTrail>().Single().NewPartScale = new Vector2(3));
+            AddWaitStep("let the cursor trail draw a bit", 5);
+            AddStep("contract", () => this.ChildrenOfType<CursorTrail>().Single().NewPartScale = Vector2.One);
+        }
+
         private void createTest(Func<Drawable> createContent) => AddStep("create trail", () =>
         {
             Clear();

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

@@ -0,0 +1,133 @@
+// 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 System.Linq;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Testing;
+using osu.Game.Replays;
+using osu.Game.Rulesets.Osu.Configuration;
+using osu.Game.Rulesets.Osu.Replays;
+using osu.Game.Rulesets.Osu.UI;
+using osu.Game.Rulesets.Replays;
+using osu.Game.Tests.Visual;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public partial class TestSceneOsuAnalysisContainer : OsuTestScene
+    {
+        private TestReplayAnalysisOverlay analysisContainer = null!;
+        private ReplayAnalysisSettings settings = null!;
+
+        [Cached]
+        private OsuRulesetConfigManager config = new OsuRulesetConfigManager(null, new OsuRuleset().RulesetInfo);
+
+        [SetUpSteps]
+        public void SetUpSteps()
+        {
+            AddStep("create analysis container", () =>
+            {
+                Children = new Drawable[]
+                {
+                    new OsuPlayfieldAdjustmentContainer
+                    {
+                        Child = analysisContainer = new TestReplayAnalysisOverlay(fabricateReplay()),
+                    },
+                    settings = new ReplayAnalysisSettings(config),
+                };
+
+                settings.ShowClickMarkers.Value = false;
+                settings.ShowAimMarkers.Value = false;
+                settings.ShowCursorPath.Value = false;
+            });
+        }
+
+        [Test]
+        public void TestEverythingOn()
+        {
+            AddStep("enable everything", () =>
+            {
+                settings.ShowClickMarkers.Value = true;
+                settings.ShowAimMarkers.Value = true;
+                settings.ShowCursorPath.Value = true;
+            });
+        }
+
+        [Test]
+        public void TestHitMarkers()
+        {
+            AddStep("enable hit markers", () => settings.ShowClickMarkers.Value = true);
+            AddUntilStep("hit markers visible", () => analysisContainer.HitMarkersVisible);
+            AddStep("disable hit markers", () => settings.ShowClickMarkers.Value = false);
+            AddUntilStep("hit markers not visible", () => !analysisContainer.HitMarkersVisible);
+        }
+
+        [Test]
+        public void TestAimMarker()
+        {
+            AddStep("enable aim markers", () => settings.ShowAimMarkers.Value = true);
+            AddUntilStep("aim markers visible", () => analysisContainer.AimMarkersVisible);
+            AddStep("disable aim markers", () => settings.ShowAimMarkers.Value = false);
+            AddUntilStep("aim markers not visible", () => !analysisContainer.AimMarkersVisible);
+        }
+
+        [Test]
+        public void TestAimLines()
+        {
+            AddStep("enable aim lines", () => settings.ShowCursorPath.Value = true);
+            AddUntilStep("aim lines visible", () => analysisContainer.AimLinesVisible);
+            AddStep("disable aim lines", () => settings.ShowCursorPath.Value = false);
+            AddUntilStep("aim lines not visible", () => !analysisContainer.AimLinesVisible);
+        }
+
+        private Replay fabricateReplay()
+        {
+            var frames = new List<ReplayFrame>();
+            var random = new Random();
+            int posX = 250;
+            int posY = 250;
+
+            var actions = new HashSet<OsuAction>();
+
+            for (int i = 0; i < 1000; i++)
+            {
+                posX = Math.Clamp(posX + random.Next(-20, 21), -100, 600);
+                posY = Math.Clamp(posY + random.Next(-20, 21), -100, 600);
+
+                if (random.NextDouble() > (actions.Count == 0 ? 0.9 : 0.95))
+                {
+                    actions.Add(random.NextDouble() > 0.5 ? OsuAction.LeftButton : OsuAction.RightButton);
+                }
+                else if (random.NextDouble() > 0.7)
+                {
+                    actions.Remove(random.NextDouble() > 0.5 ? OsuAction.LeftButton : OsuAction.RightButton);
+                }
+
+                frames.Add(new OsuReplayFrame
+                {
+                    Time = Time.Current + i * 15,
+                    Position = new Vector2(posX, posY),
+                    Actions = actions.ToList(),
+                });
+            }
+
+            return new Replay { Frames = frames };
+        }
+
+        private partial class TestReplayAnalysisOverlay : ReplayAnalysisOverlay
+        {
+            public TestReplayAnalysisOverlay(Replay replay)
+                : base(replay)
+            {
+            }
+
+            public bool HitMarkersVisible => ClickMarkers?.Alpha > 0 && ClickMarkers.Entries.Any();
+            public bool AimMarkersVisible => FrameMarkers?.Alpha > 0 && FrameMarkers.Entries.Any();
+            public bool AimLinesVisible => CursorPath?.Alpha > 0 && CursorPath.Vertices.Count > 1;
+        }
+    }
+}

osu.Game.Rulesets.Osu/Configuration/OsuRulesetConfigManager.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 osu.Game.Configuration;
 using osu.Game.Rulesets.Configuration;
 using osu.Game.Rulesets.UI;
@@ -11,7 +9,7 @@ namespace osu.Game.Rulesets.Osu.Configuration
 {
     public class OsuRulesetConfigManager : RulesetConfigManager<OsuRulesetSetting>
     {
-        public OsuRulesetConfigManager(SettingsStore settings, RulesetInfo ruleset, int? variant = null)
+        public OsuRulesetConfigManager(SettingsStore? settings, RulesetInfo ruleset, int? variant = null)
             : base(settings, ruleset, variant)
         {
         }
@@ -24,6 +22,12 @@ namespace osu.Game.Rulesets.Osu.Configuration
             SetDefault(OsuRulesetSetting.ShowCursorTrail, true);
             SetDefault(OsuRulesetSetting.ShowCursorRipples, false);
             SetDefault(OsuRulesetSetting.PlayfieldBorderStyle, PlayfieldBorderStyle.None);
+
+            SetDefault(OsuRulesetSetting.ReplayClickMarkersEnabled, false);
+            SetDefault(OsuRulesetSetting.ReplayFrameMarkersEnabled, false);
+            SetDefault(OsuRulesetSetting.ReplayCursorPathEnabled, false);
+            SetDefault(OsuRulesetSetting.ReplayCursorHideEnabled, false);
+            SetDefault(OsuRulesetSetting.ReplayAnalysisDisplayLength, 800);
         }
     }
 
@@ -34,5 +38,12 @@ namespace osu.Game.Rulesets.Osu.Configuration
         ShowCursorTrail,
         ShowCursorRipples,
         PlayfieldBorderStyle,
+
+        // Replay
+        ReplayClickMarkersEnabled,
+        ReplayFrameMarkersEnabled,
+        ReplayCursorPathEnabled,
+        ReplayCursorHideEnabled,
+        ReplayAnalysisDisplayLength,
     }
 }

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 double rhythm_multiplier = 0.75;
+        private const int history_time_max = 5 * 1000; // 5 seconds
+        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)
-                            islandSize++; // island is still progressing, count size.
+                        // island is still progressing
+                        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
-                            effectiveRatio *= 0.25;
+                        // 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 *= 0.3;
 
-                        if (previousIslandSize == islandSize) // repeated island size (ex: triplet -> triplet)
-                            effectiveRatio *= 0.25;
+                        // repeated island polarity (2 -> 4, 3 -> 5)
+                        if (island.IsSimilarPolarity(previousIsland))
+                            effectiveRatio *= 0.5;
 
-                        if (previousIslandSize % 2 == islandSize % 2) // repeated island polartiy (2 -> 4, 3 -> 5)
-                            effectiveRatio *= 0.50;
-
-                        if (lastDelta > prevDelta + 10 && prevDelta > currDelta + 10) // previous increase happened a note ago, 1/1->1/2-1/4, dont want to buff this.
+                        // previous increase happened a note ago, 1/1->1/2-1/4, dont want to buff this.
+                        if (lastDelta > prevDelta + deltaDifferenceEpsilon && prevDelta > currDelta + deltaDifferenceEpsilon)
                             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
-                            firstDeltaSwitch = false; // if we're speeding up, this stays true and  we keep counting island size.
+                        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

@@ -10,9 +10,10 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
 {
     public static class SpeedEvaluator
     {
-        private const double single_spacing_threshold = 125;
+        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;
 
         /// <summary>
         /// Evaluates the difficulty of tapping the current object, based on:
@@ -30,36 +31,35 @@ 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;
-
-            // 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);
-            }
+            double doubletapness = 1.0 - osuCurrObj.GetDoubletapness((OsuDifficultyHitObject?)osuCurrObj.Next(0));
 
             // 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.
             strainTime /= Math.Clamp((strainTime / osuCurrObj.HitWindowGreat) / 0.93, 0.92, 1);
 
-            // derive speedBonus for calculation
-            double speedBonus = 1.0;
+            // speedBonus will be 0.0 for BPM < 200
+            double speedBonus = 0.0;
 
+            // Add additional scaling bonus for streams/bursts higher than 200bpm
             if (strainTime < min_speed_bonus)
-                speedBonus = 1 + 0.75 * Math.Pow((min_speed_bonus - strainTime) / speed_balancing_factor, 2);
+                speedBonus = 0.75 * Math.Pow((min_speed_bonus - strainTime) / speed_balancing_factor, 2);
 
             double travelDistance = osuPrevObj?.TravelDistance ?? 0;
-            double distance = Math.Min(single_spacing_threshold, travelDistance + osuCurrObj.MinimumJumpDistance);
+            double distance = travelDistance + osuCurrObj.MinimumJumpDistance;
 
-            return (speedBonus + speedBonus * Math.Pow(distance / single_spacing_threshold, 3.5)) * doubletapness / strainTime;
+            // Cap distance at single_spacing_threshold
+            distance = Math.Min(distance, single_spacing_threshold);
+
+            // Max distance bonus is 1 * `distance_multiplier` at single_spacing_threshold
+            double distanceBonus = Math.Pow(distance / single_spacing_threshold, 3.95) * distance_multiplier;
+
+            // Base difficulty with all bonuses
+            double difficulty = (1 + speedBonus + distanceBonus) * 1000 / strainTime;
+
+            // Apply penalty if there's doubletappable doubles
+            return difficulty * doubletapness;
         }
     }
 }

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

@@ -46,6 +46,12 @@ 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>
@@ -99,6 +105,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty
                 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);
         }
 
@@ -113,8 +122,9 @@ 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

@@ -24,7 +24,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
     {
         private const double difficulty_multiplier = 0.0675;
 
-        public override int Version => 20220902;
+        public override int Version => 20241007;
 
         public OsuDifficultyCalculator(IRulesetInfo ruleset, IWorkingBeatmap beatmap)
             : base(ruleset, beatmap)
@@ -48,6 +48,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty
 
             double sliderFactor = aimRating > 0 ? aimRatingNoSliders / aimRating : 1;
 
+            double aimDifficultyStrainCount = ((OsuStrainSkill)skills[0]).CountDifficultStrains();
+            double speedDifficultyStrainCount = ((OsuStrainSkill)skills[2]).CountDifficultStrains();
+
             if (mods.Any(m => m is OsuModTouchDevice))
             {
                 aimRating = Math.Pow(aimRating, 0.8);
@@ -81,7 +84,6 @@ 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);
@@ -101,10 +103,12 @@ namespace osu.Game.Rulesets.Osu.Difficulty
                 SpeedNoteCount = speedNotes,
                 FlashlightDifficulty = flashlightRating,
                 SliderFactor = sliderFactor,
+                AimDifficultStrainCount = aimDifficultyStrainCount,
+                SpeedDifficultStrainCount = speedDifficultyStrainCount,
                 ApproachRate = preempt > 1200 ? (1800 - preempt) / 120 : (1200 - preempt) / 150 + 5,
                 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);
@@ -93,11 +97,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
                                  (totalHits > 2000 ? Math.Log10(totalHits / 2000.0) * 0.5 : 0.0);
             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 *= getComboScalingFactor(attributes);
+                aimValue *= calculateMissPenalty(effectiveMissCount, attributes.AimDifficultStrainCount);
 
             double approachRateFactor = 0.0;
             if (attributes.ApproachRate > 10.33)
@@ -146,11 +147,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
                                  (totalHits > 2000 ? Math.Log10(totalHits / 2000.0) * 0.5 : 0.0);
             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 *= getComboScalingFactor(attributes);
+                speedValue *= calculateMissPenalty(effectiveMissCount, attributes.SpeedDifficultStrainCount);
 
             double approachRateFactor = 0.0;
             if (attributes.ApproachRate > 10.33)
@@ -177,7 +175,7 @@ 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);
@@ -193,6 +191,8 @@ 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);
@@ -265,6 +265,10 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             return Math.Max(countMiss, comboBasedMissCount);
         }
 
+        // 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

@@ -20,7 +20,8 @@ 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;
 
@@ -93,7 +94,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
             this.lastObject = (OsuHitObject)lastObject;
 
             // 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)
             {
@@ -136,6 +137,24 @@ 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)
@@ -143,7 +162,7 @@ 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
@@ -167,8 +186,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
 
             if (lastObject is Slider lastSlider)
             {
-                double lastTravelTime = Math.Max(lastSlider.LazyTravelTime / clockRate, min_delta_time);
-                MinimumJumpTime = Math.Max(StrainTime - lastTravelTime, min_delta_time);
+                double lastTravelTime = Math.Max(lastSlider.LazyTravelTime / clockRate, 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

@@ -23,7 +23,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
 
         private double currentStrain;
 
-        private double skillMultiplier => 23.55;
+        private double skillMultiplier => 25.18;
         private double strainDecayBase => 0.15;
 
         private double strainDecay(double ms) => Math.Pow(strainDecayBase, ms / 1000);
@@ -34,6 +34,7 @@ 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/Flashlight.cs

@@ -24,7 +24,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
             hasHiddenMod = mods.Any(m => m is OsuModHidden);
         }
 
-        private double skillMultiplier => 0.052;
+        private double skillMultiplier => 0.05512;
         private double strainDecayBase => 0.15;
 
         private double currentStrain;
@@ -41,7 +41,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
             return currentStrain;
         }
 
-        public override double DifficultyValue() => GetCurrentStrainPeaks().Sum() * OsuStrainSkill.DEFAULT_DIFFICULTY_MULTIPLIER;
+        public override double DifficultyValue() => GetCurrentStrainPeaks().Sum();
 
         public static double DifficultyToPerformance(double difficulty) => 25 * Math.Pow(difficulty, 2);
     }

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

@@ -12,12 +12,6 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
 {
     public abstract class OsuStrainSkill : StrainSkill
     {
-        /// <summary>
-        /// The default multiplier applied by <see cref="OsuStrainSkill"/> to the final difficulty value after all other calculations.
-        /// May be overridden via <see cref="DifficultyMultiplier"/>.
-        /// </summary>
-        public const double DEFAULT_DIFFICULTY_MULTIPLIER = 1.06;
-
         /// <summary>
         /// The number of sections with the highest strains, which the peak strain reductions will apply to.
         /// This is done in order to decrease their impact on the overall difficulty of the map for this skill.
@@ -29,10 +23,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
         /// </summary>
         protected virtual double ReducedStrainBaseline => 0.75;
 
-        /// <summary>
-        /// The final multiplier to be applied to <see cref="DifficultyValue"/> after all other calculations.
-        /// </summary>
-        protected virtual double DifficultyMultiplier => DEFAULT_DIFFICULTY_MULTIPLIER;
+        protected List<double> ObjectStrains = new List<double>();
+        protected double Difficulty;
 
         protected OsuStrainSkill(Mod[] mods)
             : base(mods)
@@ -41,7 +33,7 @@ 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).
@@ -61,11 +53,25 @@ 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 * DifficultyMultiplier;
+            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))));
         }
 
         public static double DifficultyToPerformance(double difficulty) => Math.Pow(5.0 * Math.Max(1.0, difficulty / 0.0675) - 4.0, 3.0) / 100000.0;

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
@@ -16,16 +15,13 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
     /// </summary>
     public class Speed : OsuStrainSkill
     {
-        private double skillMultiplier => 1375;
+        private double skillMultiplier => 1.430;
         private double strainDecayBase => 0.3;
 
         private double currentStrain;
         private double currentRhythm;
 
         protected override int ReducedSectionCount => 5;
-        protected override double DifficultyMultiplier => 1.04;
-
-        private readonly List<double> objectStrains = new List<double>();
 
         public Speed(Mod[] mods)
             : base(mods)
@@ -44,23 +40,21 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
             currentRhythm = RhythmEvaluator.EvaluateDifficultyOf(current);
 
             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/GridPlacementBlueprint.cs

@@ -0,0 +1,126 @@
+// 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 osu.Framework.Allocation;
+using osu.Framework.Input.Events;
+using osu.Game.Rulesets.Edit;
+using osuTK;
+using osuTK.Input;
+
+namespace osu.Game.Rulesets.Osu.Edit.Blueprints
+{
+    public partial class GridPlacementBlueprint : PlacementBlueprint
+    {
+        [Resolved]
+        private HitObjectComposer? hitObjectComposer { get; set; }
+
+        private OsuGridToolboxGroup gridToolboxGroup = null!;
+        private Vector2 originalOrigin;
+        private float originalSpacing;
+        private float originalRotation;
+
+        [BackgroundDependencyLoader]
+        private void load(OsuGridToolboxGroup gridToolboxGroup)
+        {
+            this.gridToolboxGroup = gridToolboxGroup;
+            originalOrigin = gridToolboxGroup.StartPosition.Value;
+            originalSpacing = gridToolboxGroup.Spacing.Value;
+            originalRotation = gridToolboxGroup.GridLinesRotation.Value;
+        }
+
+        public override void EndPlacement(bool commit)
+        {
+            if (!commit && PlacementActive != PlacementState.Finished)
+            {
+                gridToolboxGroup.StartPosition.Value = originalOrigin;
+                gridToolboxGroup.Spacing.Value = originalSpacing;
+                if (!gridToolboxGroup.GridLinesRotation.Disabled)
+                    gridToolboxGroup.GridLinesRotation.Value = originalRotation;
+            }
+
+            base.EndPlacement(commit);
+
+            // You typically only place the grid once, so we switch back to the last tool after placement.
+            if (commit && hitObjectComposer is OsuHitObjectComposer osuHitObjectComposer)
+                osuHitObjectComposer.SetLastTool();
+        }
+
+        protected override bool OnClick(ClickEvent e)
+        {
+            if (e.Button == MouseButton.Left)
+            {
+                switch (PlacementActive)
+                {
+                    case PlacementState.Waiting:
+                        BeginPlacement(true);
+                        return true;
+
+                    case PlacementState.Active:
+                        EndPlacement(true);
+                        return true;
+                }
+            }
+
+            return base.OnClick(e);
+        }
+
+        protected override bool OnMouseDown(MouseDownEvent e)
+        {
+            if (e.Button == MouseButton.Right)
+            {
+                // Reset the grid to the default values.
+                gridToolboxGroup.StartPosition.Value = gridToolboxGroup.StartPosition.Default;
+                gridToolboxGroup.Spacing.Value = gridToolboxGroup.Spacing.Default;
+                if (!gridToolboxGroup.GridLinesRotation.Disabled)
+                    gridToolboxGroup.GridLinesRotation.Value = gridToolboxGroup.GridLinesRotation.Default;
+                EndPlacement(true);
+                return true;
+            }
+
+            return base.OnMouseDown(e);
+        }
+
+        protected override bool OnDragStart(DragStartEvent e)
+        {
+            if (e.Button == MouseButton.Left)
+            {
+                BeginPlacement(true);
+                return true;
+            }
+
+            return base.OnDragStart(e);
+        }
+
+        protected override void OnDragEnd(DragEndEvent e)
+        {
+            if (PlacementActive == PlacementState.Active)
+                EndPlacement(true);
+
+            base.OnDragEnd(e);
+        }
+
+        public override SnapType SnapType => ~SnapType.GlobalGrids;
+
+        public override void UpdateTimeAndPosition(SnapResult result)
+        {
+            var pos = ToLocalSpace(result.ScreenSpacePosition);
+
+            if (PlacementActive != PlacementState.Active)
+                gridToolboxGroup.StartPosition.Value = pos;
+            else
+            {
+                // Default to the original spacing and rotation if the distance is too small.
+                if (Vector2.Distance(gridToolboxGroup.StartPosition.Value, pos) < 2)
+                {
+                    gridToolboxGroup.Spacing.Value = originalSpacing;
+                    if (!gridToolboxGroup.GridLinesRotation.Disabled)
+                        gridToolboxGroup.GridLinesRotation.Value = originalRotation;
+                }
+                else
+                {
+                    gridToolboxGroup.SetGridFromPoints(gridToolboxGroup.StartPosition.Value, pos);
+                }
+            }
+        }
+    }
+}

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/PathControlPointPiece.cs

@@ -40,7 +40,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
         public readonly PathControlPoint ControlPoint;
 
         private readonly T hitObject;
-        private readonly Circle circle;
+        private readonly FastCircle circle;
         private readonly Drawable markerRing;
 
         [Resolved]
@@ -62,7 +62,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
 
             InternalChildren = new[]
             {
-                circle = new Circle
+                circle = new FastCircle
                 {
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,

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();
-                    var selectedPoint = selectedPiece.ControlPoint;
+                    PathControlPointPiece<T> selectedPiece = selectedPieces.Single();
+                    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

@@ -1,7 +1,10 @@
 // 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.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Primitives;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components;
 using osu.Game.Rulesets.Osu.Objects;
 
@@ -9,11 +12,28 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 {
     public partial class SliderCircleOverlay : CompositeDrawable
     {
+        public SliderEndDragMarker? EndDragMarker { get; }
+
+        public RectangleF VisibleQuad
+        {
+            get
+            {
+                var result = CirclePiece.ScreenSpaceDrawQuad.AABBFloat;
+
+                if (endDragMarkerContainer == null) return result;
+
+                var size = result.Size * 1.4f;
+                var location = result.TopLeft - result.Size * 0.2f;
+                return new RectangleF(location, size);
+            }
+        }
+
         protected readonly HitCirclePiece CirclePiece;
 
         private readonly Slider slider;
         private readonly SliderPosition position;
         private readonly HitCircleOverlapMarker? marker;
+        private readonly Container? endDragMarkerContainer;
 
         public SliderCircleOverlay(Slider slider, SliderPosition position)
         {
@@ -24,26 +44,49 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
                 AddInternal(marker = new HitCircleOverlapMarker());
 
             AddInternal(CirclePiece = new HitCirclePiece());
+
+            if (position == SliderPosition.End)
+            {
+                AddInternal(endDragMarkerContainer = new Container
+                {
+                    AutoSizeAxes = Axes.Both,
+                    Anchor = Anchor.CentreLeft,
+                    Origin = Anchor.CentreLeft,
+                    Padding = new MarginPadding(-2.5f),
+                    Child = EndDragMarker = new SliderEndDragMarker()
+                });
+            }
         }
 
         protected override void Update()
         {
             base.Update();
 
-            var circle = position == SliderPosition.Start ? (HitCircle)slider.HeadCircle : slider.TailCircle;
+            var circle = position == SliderPosition.Start ? (HitCircle)slider.HeadCircle :
+                slider.RepeatCount % 2 == 0 ? slider.TailCircle : slider.LastRepeat!;
 
             CirclePiece.UpdateFrom(circle);
             marker?.UpdateFrom(circle);
+
+            if (endDragMarkerContainer != null)
+            {
+                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));
+            }
         }
 
         public override void Hide()
         {
             CirclePiece.Hide();
+            endDragMarkerContainer?.Hide();
         }
 
         public override void Show()
         {
             CirclePiece.Show();
+            endDragMarkerContainer?.Show();
         }
     }
 }

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

@@ -0,0 +1,84 @@
+// 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.Graphics.Lines;
+using osu.Framework.Input.Events;
+using osu.Framework.Utils;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Osu.Objects;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
+{
+    public partial class SliderEndDragMarker : SmoothPath
+    {
+        public Action<DragStartEvent>? StartDrag { get; set; }
+        public Action<DragEvent>? Drag { get; set; }
+        public Action? EndDrag { get; set; }
+
+        [Resolved]
+        private OsuColour colours { get; set; } = null!;
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            var path = PathApproximator.CircularArcToPiecewiseLinear([
+                new Vector2(0, OsuHitObject.OBJECT_RADIUS),
+                new Vector2(OsuHitObject.OBJECT_RADIUS, 0),
+                new Vector2(0, -OsuHitObject.OBJECT_RADIUS)
+            ]);
+
+            Anchor = Anchor.CentreLeft;
+            Origin = Anchor.CentreLeft;
+            PathRadius = 5;
+            Vertices = path;
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            updateState();
+        }
+
+        protected override bool OnHover(HoverEvent e)
+        {
+            updateState();
+            return true;
+        }
+
+        protected override void OnHoverLost(HoverLostEvent e)
+        {
+            updateState();
+            base.OnHoverLost(e);
+        }
+
+        protected override bool OnDragStart(DragStartEvent e)
+        {
+            updateState();
+            StartDrag?.Invoke(e);
+            return true;
+        }
+
+        protected override void OnDrag(DragEvent e)
+        {
+            updateState();
+            base.OnDrag(e);
+            Drag?.Invoke(e);
+        }
+
+        protected override void OnDragEnd(DragEndEvent e)
+        {
+            updateState();
+            EndDrag?.Invoke();
+            base.OnDragEnd(e);
+        }
+
+        private void updateState()
+        {
+            Colour = IsHovered || IsDragged ? colours.Red : colours.Yellow;
+        }
+    }
+}

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

@@ -1,13 +1,9 @@
 // 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 System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
-using JetBrains.Annotations;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Input;
@@ -25,34 +21,33 @@ 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;
 
-        private SliderBodyPiece bodyPiece;
-        private HitCirclePiece headCirclePiece;
-        private HitCirclePiece tailCirclePiece;
-        private PathControlPointVisualiser<Slider> controlPointVisualiser;
+        private SliderBodyPiece bodyPiece = null!;
+        private HitCirclePiece headCirclePiece = null!;
+        private HitCirclePiece tailCirclePiece = null!;
+        private PathControlPointVisualiser<Slider> controlPointVisualiser = null!;
 
-        private InputManager inputManager;
+        private InputManager inputManager = null!;
+
+        private PathControlPoint? cursor;
 
         private SliderPlacementState state;
         private PathControlPoint segmentStart;
-        private PathControlPoint cursor;
+
         private int currentSegmentLength;
         private bool usingCustomSegmentType;
 
-        [Resolved(CanBeNull = true)]
-        [CanBeNull]
-        private IPositionSnapProvider positionSnapProvider { get; set; }
+        [Resolved]
+        private IPositionSnapProvider? positionSnapProvider { get; set; }
 
-        [Resolved(CanBeNull = true)]
-        [CanBeNull]
-        private IDistanceSnapProvider distanceSnapProvider { get; set; }
+        [Resolved]
+        private IDistanceSnapProvider? distanceSnapProvider { get; set; }
 
-        [Resolved(CanBeNull = true)]
-        [CanBeNull]
-        private FreehandSliderToolboxGroup freehandToolboxGroup { get; set; }
+        [Resolved]
+        private FreehandSliderToolboxGroup? freehandToolboxGroup { get; set; }
 
         private readonly IncrementalBSplineBuilder bSplineBuilder = new IncrementalBSplineBuilder { Degree = 4 };
 
@@ -84,7 +79,8 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         protected override void LoadComplete()
         {
             base.LoadComplete();
-            inputManager = GetContainingInputManager();
+
+            inputManager = GetContainingInputManager()!;
 
             if (freehandToolboxGroup != null)
             {
@@ -108,7 +104,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         }
 
         [Resolved]
-        private EditorBeatmap editorBeatmap { get; set; }
+        private EditorBeatmap editorBeatmap { get; set; } = null!;
 
         public override void UpdateTimeAndPosition(SnapResult result)
         {
@@ -151,7 +147,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
                 case SliderPlacementState.ControlPoints:
                     if (canPlaceNewControlPoint(out var lastPoint))
                         placeNewControlPoint();
-                    else
+                    else if (lastPoint != null)
                         beginNewSegment(lastPoint);
 
                     break;
@@ -162,9 +158,6 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 
         private void beginNewSegment(PathControlPoint lastPoint)
         {
-            // Transform the last point into a new segment.
-            Debug.Assert(lastPoint != null);
-
             segmentStart = lastPoint;
             segmentStart.Type = PathType.LINEAR;
 
@@ -359,8 +352,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
                 }
 
                 // Update the cursor position.
-                var result = positionSnapProvider?.FindSnappedPositionAndTime(inputManager.CurrentState.Mouse.Position, state == SliderPlacementState.ControlPoints ? SnapType.GlobalGrids : SnapType.All);
-                cursor.Position = ToLocalSpace(result?.ScreenSpacePosition ?? inputManager.CurrentState.Mouse.Position) - HitObject.Position;
+                cursor.Position = getCursorPosition();
             }
             else if (cursor != null)
             {
@@ -374,19 +366,27 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             }
         }
 
+        private Vector2 getCursorPosition()
+        {
+            var result = positionSnapProvider?.FindSnappedPositionAndTime(inputManager.CurrentState.Mouse.Position, state == SliderPlacementState.ControlPoints ? SnapType.GlobalGrids : SnapType.All);
+            return ToLocalSpace(result?.ScreenSpacePosition ?? inputManager.CurrentState.Mouse.Position) - HitObject.Position;
+        }
+
         /// <summary>
         /// Whether a new control point can be placed at the current mouse position.
         /// </summary>
         /// <param name="lastPoint">The last-placed control point. May be null, but is not null if <c>false</c> is returned.</param>
         /// <returns>Whether a new control point can be placed at the current position.</returns>
-        private bool canPlaceNewControlPoint([CanBeNull] out PathControlPoint lastPoint)
+        private bool canPlaceNewControlPoint(out PathControlPoint? lastPoint)
         {
             // We cannot rely on the ordering of drawable pieces, so find the respective drawable piece by searching for the last non-cursor control point.
             var last = HitObject.Path.ControlPoints.LastOrDefault(p => p != cursor);
             var lastPiece = controlPointVisualiser.Pieces.Single(p => p.ControlPoint == last);
 
             lastPoint = last;
-            return lastPiece.IsHovered != true;
+            // We may only place a new control point if the cursor is not overlapping with the last control point.
+            // If snapping is enabled, the cursor may not hover the last piece while still placing the control point at the same position.
+            return !lastPiece.IsHovered && (last is null || Vector2.DistanceSquared(last.Position, getCursorPosition()) > 1f);
         }
 
         private void placeNewControlPoint()
@@ -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);
@@ -429,7 +429,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
                 // Replace this segment with a circular arc if it is a reasonable substitute.
                 var circleArcSegment = tryCircleArc(segment);
 
-                if (circleArcSegment is not null)
+                if (circleArcSegment != null)
                 {
                     HitObject.Path.ControlPoints.Add(new PathControlPoint(circleArcSegment[0], PathType.PERFECT_CURVE));
                     HitObject.Path.ControlPoints.Add(new PathControlPoint(circleArcSegment[1]));
@@ -446,7 +446,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             }
         }
 
-        private Vector2[] tryCircleArc(List<Vector2> segment)
+        private Vector2[]? tryCircleArc(List<Vector2> segment)
         {
             if (segment.Count < 3 || freehandToolboxGroup?.CircleThreshold.Value == 0) return null;
 

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

@@ -1,16 +1,17 @@
 // 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 System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
-using JetBrains.Annotations;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
+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;
@@ -33,27 +34,28 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
     {
         protected new DrawableSlider DrawableObject => (DrawableSlider)base.DrawableObject;
 
-        protected SliderBodyPiece BodyPiece { get; private set; }
-        protected SliderCircleOverlay HeadOverlay { get; private set; }
-        protected SliderCircleOverlay TailOverlay { get; private set; }
+        protected SliderBodyPiece BodyPiece { get; private set; } = null!;
+        protected SliderCircleOverlay HeadOverlay { get; private set; } = null!;
+        protected SliderCircleOverlay TailOverlay { get; private set; } = null!;
 
-        [CanBeNull]
-        protected PathControlPointVisualiser<Slider> ControlPointVisualiser { get; private set; }
+        protected PathControlPointVisualiser<Slider>? ControlPointVisualiser { get; private set; }
 
-        [Resolved(CanBeNull = true)]
-        private IDistanceSnapProvider distanceSnapProvider { get; set; }
+        [Resolved]
+        private IDistanceSnapProvider? distanceSnapProvider { get; set; }
 
-        [Resolved(CanBeNull = true)]
-        private IPlacementHandler placementHandler { get; set; }
+        [Resolved]
+        private IPlacementHandler? placementHandler { get; set; }
 
-        [Resolved(CanBeNull = true)]
-        private EditorBeatmap editorBeatmap { get; set; }
+        [Resolved]
+        private EditorBeatmap? editorBeatmap { get; set; }
 
-        [Resolved(CanBeNull = true)]
-        private IEditorChangeHandler changeHandler { get; set; }
+        [Resolved]
+        private IEditorChangeHandler? changeHandler { get; set; }
 
-        [Resolved(CanBeNull = true)]
-        private BindableBeatDivisor beatDivisor { get; set; }
+        [Resolved]
+        private BindableBeatDivisor? beatDivisor { get; set; }
+
+        private PathControlPoint? placementControlPoint;
 
         public override Quad SelectionQuad
         {
@@ -61,6 +63,9 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             {
                 var result = BodyPiece.ScreenSpaceDrawQuad.AABBFloat;
 
+                result = RectangleF.Union(result, HeadOverlay.VisibleQuad);
+                result = RectangleF.Union(result, TailOverlay.VisibleQuad);
+
                 if (ControlPointVisualiser != null)
                 {
                     foreach (var piece in ControlPointVisualiser.Pieces)
@@ -76,6 +81,11 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         private readonly BindableList<HitObject> selectedObjects = new BindableList<HitObject>();
         private readonly Bindable<bool> showHitMarkers = new Bindable<bool>();
 
+        // Cached slider path which ignored the expected distance value.
+        private readonly Cached<SliderPath> fullPathCache = new Cached<SliderPath>();
+
+        private Vector2 lastRightClickPosition;
+
         public SliderSelectionBlueprint(Slider slider)
             : base(slider)
         {
@@ -91,6 +101,13 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
                 TailOverlay = CreateCircleOverlay(HitObject, SliderPosition.End),
             };
 
+            // tail will always have a non-null end drag marker.
+            Debug.Assert(TailOverlay.EndDragMarker != null);
+
+            TailOverlay.EndDragMarker.StartDrag += startAdjustingLength;
+            TailOverlay.EndDragMarker.Drag += adjustLength;
+            TailOverlay.EndDragMarker.EndDrag += endAdjustLength;
+
             config.BindWith(OsuSetting.EditorShowHitMarkers, showHitMarkers);
         }
 
@@ -99,6 +116,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             base.LoadComplete();
 
             controlPoints.BindTo(HitObject.Path.ControlPoints);
+            controlPoints.CollectionChanged += (_, _) => fullPathCache.Invalidate();
 
             pathVersion.BindTo(HitObject.Path.Version);
             pathVersion.BindValueChanged(_ => editorBeatmap?.Update(HitObject));
@@ -123,7 +141,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
                 return false;
 
             hoveredControlPoint.IsSelected.Value = true;
-            ControlPointVisualiser.DeleteSelected();
+            ControlPointVisualiser?.DeleteSelected();
             return true;
         }
 
@@ -141,7 +159,6 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         protected override bool OnHover(HoverEvent e)
         {
             updateVisualDefinition();
-
             return base.OnHover(e);
         }
 
@@ -186,17 +203,16 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             }
         }
 
-        private Vector2 rightClickPosition;
-
         protected override bool OnMouseDown(MouseDownEvent e)
         {
             switch (e.Button)
             {
                 case MouseButton.Right:
-                    rightClickPosition = e.MouseDownPosition;
+                    lastRightClickPosition = e.MouseDownPosition;
                     return false; // Allow right click to be handled by context menu
 
                 case MouseButton.Left:
+
                     // If there's more than two objects selected, ctrl+click should deselect
                     if (e.ControlPressed && IsSelected && selectedObjects.Count < 2)
                     {
@@ -212,8 +228,134 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             return false;
         }
 
-        [CanBeNull]
-        private PathControlPoint placementControlPoint;
+        #region Length Adjustment (independent of path nodes)
+
+        private Vector2 lengthAdjustMouseOffset;
+        private double oldDuration;
+        private double oldVelocityMultiplier;
+        private double desiredDistance;
+        private bool isAdjustingLength;
+        private bool adjustVelocityMomentary;
+
+        private void startAdjustingLength(DragStartEvent e)
+        {
+            isAdjustingLength = true;
+            adjustVelocityMomentary = e.ShiftPressed;
+            lengthAdjustMouseOffset = ToLocalSpace(e.ScreenSpaceMouseDownPosition) - HitObject.Position - HitObject.Path.PositionAt(1);
+            oldDuration = HitObject.Path.Distance / HitObject.SliderVelocityMultiplier;
+            oldVelocityMultiplier = HitObject.SliderVelocityMultiplier;
+            changeHandler?.BeginChange();
+        }
+
+        private void endAdjustLength()
+        {
+            trimExcessControlPoints(HitObject.Path);
+            changeHandler?.EndChange();
+            isAdjustingLength = false;
+        }
+
+        private void adjustLength(MouseEvent e) => adjustLength(findClosestPathDistance(e), e.ShiftPressed);
+
+        private void adjustLength(double proposedDistance, bool adjustVelocity)
+        {
+            desiredDistance = proposedDistance;
+            double proposedVelocity = oldVelocityMultiplier;
+
+            if (adjustVelocity)
+            {
+                proposedVelocity = proposedDistance / oldDuration;
+                proposedDistance = MathHelper.Clamp(proposedDistance, 0.1 * oldDuration, 10 * oldDuration);
+            }
+            else
+            {
+                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, DistanceSnapTarget.Start) ?? proposedDistance;
+                proposedDistance = MathHelper.Clamp(proposedDistance, minDistance, HitObject.Path.CalculatedDistance);
+            }
+
+            if (Precision.AlmostEquals(proposedDistance, HitObject.Path.Distance) && Precision.AlmostEquals(proposedVelocity, HitObject.SliderVelocityMultiplier))
+                return;
+
+            HitObject.SliderVelocityMultiplier = proposedVelocity;
+            HitObject.Path.ExpectedDistance.Value = proposedDistance;
+            editorBeatmap?.Update(HitObject);
+        }
+
+        /// <summary>
+        /// Trims control points from the end of the slider path which are not required to reach the expected end of the slider.
+        /// </summary>
+        /// <param name="sliderPath">The slider path to trim control points of.</param>
+        private void trimExcessControlPoints(SliderPath sliderPath)
+        {
+            if (!sliderPath.ExpectedDistance.Value.HasValue)
+                return;
+
+            double[] segmentEnds = sliderPath.GetSegmentEnds().ToArray();
+            int segmentIndex = 0;
+
+            for (int i = 1; i < sliderPath.ControlPoints.Count - 1; i++)
+            {
+                if (!sliderPath.ControlPoints[i].Type.HasValue) continue;
+
+                if (Precision.AlmostBigger(segmentEnds[segmentIndex], 1, 1E-3))
+                {
+                    sliderPath.ControlPoints.RemoveRange(i + 1, sliderPath.ControlPoints.Count - i - 1);
+                    sliderPath.ControlPoints[^1].Type = null;
+                    break;
+                }
+
+                segmentIndex++;
+            }
+        }
+
+        /// <summary>
+        /// Finds the expected distance value for which the slider end is closest to the mouse position.
+        /// </summary>
+        private double findClosestPathDistance(MouseEvent e)
+        {
+            const double step1 = 10;
+            const double step2 = 0.1;
+            const double longer_distance_bias = 0.01;
+
+            var desiredPosition = ToLocalSpace(e.ScreenSpaceMousePosition) - HitObject.Position - lengthAdjustMouseOffset;
+
+            if (!fullPathCache.IsValid)
+                fullPathCache.Value = new SliderPath(HitObject.Path.ControlPoints.ToArray());
+
+            // Do a linear search to find the closest point on the path to the mouse position.
+            double bestValue = 0;
+            double minDistance = double.MaxValue;
+
+            for (double d = 0; d <= fullPathCache.Value.CalculatedDistance; d += step1)
+            {
+                double t = d / fullPathCache.Value.CalculatedDistance;
+                double dist = Vector2.Distance(fullPathCache.Value.PositionAt(t), desiredPosition) - d * longer_distance_bias;
+
+                if (dist >= minDistance) continue;
+
+                minDistance = dist;
+                bestValue = d;
+            }
+
+            // Do another linear search to fine-tune the result.
+            double maxValue = Math.Min(bestValue + step1, fullPathCache.Value.CalculatedDistance);
+
+            for (double d = bestValue - step1; d <= maxValue; d += step2)
+            {
+                double t = d / fullPathCache.Value.CalculatedDistance;
+                double dist = Vector2.Distance(fullPathCache.Value.PositionAt(t), desiredPosition) - d * longer_distance_bias;
+
+                if (dist >= minDistance) continue;
+
+                minDistance = dist;
+                bestValue = d;
+            }
+
+            return bestValue;
+        }
+
+        #endregion
 
         protected override bool OnDragStart(DragStartEvent e)
         {
@@ -255,9 +397,24 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
                 return true;
             }
 
+            if (isAdjustingLength && e.ShiftPressed != adjustVelocityMomentary)
+            {
+                adjustVelocityMomentary = e.ShiftPressed;
+                adjustLength(desiredDistance, adjustVelocityMomentary);
+                return true;
+            }
+
             return false;
         }
 
+        protected override void OnKeyUp(KeyUpEvent e)
+        {
+            if (!IsSelected || !isAdjustingLength || e.ShiftPressed == adjustVelocityMomentary) return;
+
+            adjustVelocityMomentary = e.ShiftPressed;
+            adjustLength(desiredDistance, adjustVelocityMomentary);
+        }
+
         private PathControlPoint addControlPoint(Vector2 position)
         {
             position -= HitObject.Position;
@@ -326,6 +483,9 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 
         private void splitControlPoints(List<PathControlPoint> controlPointsToSplitAt)
         {
+            if (editorBeatmap == null)
+                return;
+
             // Arbitrary gap in milliseconds to put between split slider pieces
             const double split_gap = 100;
 
@@ -432,10 +592,16 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             new OsuMenuItem("Add control point", MenuItemType.Standard, () =>
             {
                 changeHandler?.BeginChange();
-                addControlPoint(rightClickPosition);
+                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/GenerateToolboxGroup.cs

@@ -0,0 +1,54 @@
+// 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 osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Input.Events;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Screens.Edit.Components;
+using osuTK;
+using osuTK.Input;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public partial class GenerateToolboxGroup : EditorToolboxGroup
+    {
+        private readonly EditorToolButton polygonButton;
+
+        public GenerateToolboxGroup()
+            : base("Generate")
+        {
+            Child = new FillFlowContainer
+            {
+                RelativeSizeAxes = Axes.X,
+                AutoSizeAxes = Axes.Y,
+                Spacing = new Vector2(5),
+                Children = new Drawable[]
+                {
+                    polygonButton = new EditorToolButton("Polygon",
+                        () => new SpriteIcon { Icon = FontAwesome.Solid.Spinner },
+                        () => new PolygonGenerationPopover()),
+                }
+            };
+        }
+
+        protected override bool OnKeyDown(KeyDownEvent e)
+        {
+            if (e.Repeat) return false;
+
+            switch (e.Key)
+            {
+                case Key.D:
+                    if (!e.ControlPressed || !e.ShiftPressed)
+                        return false;
+
+                    polygonButton.TriggerClick();
+                    return true;
+
+                default:
+                    return false;
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/GridFromPointsTool.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 osu.Framework.Graphics;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Tools;
+using osu.Game.Rulesets.Osu.Edit.Blueprints;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public partial class GridFromPointsTool : CompositionTool
+    {
+        public GridFromPointsTool()
+            : base("Grid")
+        {
+            TooltipText = """
+                          Left click to set the origin.
+                          Left click again to set the spacing and rotation.
+                          Right click to reset to default.
+                          Click and drag to set the origin, spacing and rotation.
+                          """;
+        }
+
+        public override Drawable CreateIcon() => new SpriteIcon { Icon = FontAwesome.Solid.DraftingCompass };
+
+        public override PlacementBlueprint CreatePlacementBlueprint() => new GridPlacementBlueprint();
+    }
+}

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;
@@ -37,7 +38,6 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
             MinValue = 0f,
             MaxValue = OsuPlayfield.BASE_SIZE.X,
-            Precision = 1f
         };
 
         /// <summary>
@@ -47,7 +47,6 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
             MinValue = 0f,
             MaxValue = OsuPlayfield.BASE_SIZE.Y,
-            Precision = 1f
         };
 
         /// <summary>
@@ -57,7 +56,6 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
             MinValue = 4f,
             MaxValue = 128f,
-            Precision = 1f
         };
 
         /// <summary>
@@ -67,14 +65,13 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
             MinValue = -180f,
             MaxValue = 180f,
-            Precision = 1f
         };
 
         /// <summary>
         /// Read-only bindable representing the grid's origin.
         /// Equivalent to <code>new Vector2(StartPositionX, StartPositionY)</code>
         /// </summary>
-        public Bindable<Vector2> StartPosition { get; } = new Bindable<Vector2>();
+        public Bindable<Vector2> StartPosition { get; } = new Bindable<Vector2>(OsuPlayfield.BASE_SIZE / 2);
 
         /// <summary>
         /// Read-only bindable representing the grid's spacing in both the X and Y dimension.
@@ -97,6 +94,26 @@ namespace osu.Game.Rulesets.Osu.Edit
 
         private const float max_automatic_spacing = 64;
 
+        public void SetGridFromPoints(Vector2 point1, Vector2 point2)
+        {
+            StartPositionX.Value = point1.X;
+            StartPositionY.Value = point1.Y;
+
+            // Get the angle between the two points and normalize to the valid range.
+            if (!GridLinesRotation.Disabled)
+            {
+                float period = GridLinesRotation.MaxValue - GridLinesRotation.MinValue;
+                GridLinesRotation.Value = normalizeRotation(MathHelper.RadiansToDegrees(MathF.Atan2(point2.Y - point1.Y, point2.X - point1.X)), period);
+            }
+
+            // Divide the distance so that there is a good density of grid lines.
+            // This matches the maximum grid size of the grid size cycling hotkey.
+            float dist = Vector2.Distance(point1, point2);
+            while (dist >= max_automatic_spacing)
+                dist /= 2;
+            Spacing.Value = dist;
+        }
+
         [BackgroundDependencyLoader]
         private void load()
         {
@@ -160,22 +177,28 @@ namespace osu.Game.Rulesets.Osu.Edit
 
             StartPositionX.BindValueChanged(x =>
             {
-                startPositionXSlider.ContractedLabelText = $"X: {x.NewValue:N0}";
-                startPositionXSlider.ExpandedLabelText = $"X Offset: {x.NewValue:N0}";
+                startPositionXSlider.ContractedLabelText = $"X: {x.NewValue:#,0.##}";
+                startPositionXSlider.ExpandedLabelText = $"X Offset: {x.NewValue:#,0.##}";
                 StartPosition.Value = new Vector2(x.NewValue, StartPosition.Value.Y);
             }, true);
 
             StartPositionY.BindValueChanged(y =>
             {
-                startPositionYSlider.ContractedLabelText = $"Y: {y.NewValue:N0}";
-                startPositionYSlider.ExpandedLabelText = $"Y Offset: {y.NewValue:N0}";
+                startPositionYSlider.ContractedLabelText = $"Y: {y.NewValue:#,0.##}";
+                startPositionYSlider.ExpandedLabelText = $"Y Offset: {y.NewValue:#,0.##}";
                 StartPosition.Value = new Vector2(StartPosition.Value.X, y.NewValue);
             }, true);
 
+            StartPosition.BindValueChanged(pos =>
+            {
+                StartPositionX.Value = pos.NewValue.X;
+                StartPositionY.Value = pos.NewValue.Y;
+            });
+
             Spacing.BindValueChanged(spacing =>
             {
-                spacingSlider.ContractedLabelText = $"S: {spacing.NewValue:N0}";
-                spacingSlider.ExpandedLabelText = $"Spacing: {spacing.NewValue:N0}";
+                spacingSlider.ContractedLabelText = $"S: {spacing.NewValue:#,0.##}";
+                spacingSlider.ExpandedLabelText = $"Spacing: {spacing.NewValue:#,0.##}";
                 SpacingVector.Value = new Vector2(spacing.NewValue);
                 editorBeatmap.BeatmapInfo.GridSize = (int)spacing.NewValue;
             }, true);
@@ -186,12 +209,6 @@ 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;
@@ -199,18 +216,29 @@ namespace osu.Game.Rulesets.Osu.Edit
                 switch (v.NewValue)
                 {
                     case PositionSnapGridType.Square:
-                        GridLinesRotation.Value = ((GridLinesRotation.Value + 405) % 90) - 45;
+                        GridLinesRotation.Value = normalizeRotation(GridLinesRotation.Value, 90);
                         GridLinesRotation.MinValue = -45;
                         GridLinesRotation.MaxValue = 45;
                         break;
 
                     case PositionSnapGridType.Triangle:
-                        GridLinesRotation.Value = ((GridLinesRotation.Value + 390) % 60) - 30;
+                        GridLinesRotation.Value = normalizeRotation(GridLinesRotation.Value, 60);
                         GridLinesRotation.MinValue = -30;
                         GridLinesRotation.MaxValue = 30;
                         break;
                 }
             }, true);
+
+            expandingContainer?.Expanded.BindValueChanged(v =>
+            {
+                gridTypeButtons.FadeTo(v.NewValue ? 1f : 0f, 500, Easing.OutQuint);
+                gridTypeButtons.BypassAutoSizeAxes = !v.NewValue ? Axes.Y : Axes.None;
+            }, true);
+        }
+
+        private float normalizeRotation(float rotation, float period)
+        {
+            return ((rotation + 360 + period * 0.5f) % period) - period * 0.5f;
         }
 
         private void nextGridSize()

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

@@ -41,11 +41,12 @@ 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(),
-            new SpinnerCompositionTool()
+            new SpinnerCompositionTool(),
+            new GridFromPointsTool()
         };
 
         private readonly Bindable<TernaryState> rectangularGridSnapToggle = new Bindable<TernaryState>();
@@ -54,24 +55,21 @@ namespace osu.Game.Rulesets.Osu.Edit
 
         protected override IEnumerable<TernaryButton> CreateTernaryButtons()
             => base.CreateTernaryButtons()
-                   .Concat(DistanceSnapProvider.CreateTernaryButtons())
-                   .Concat(new[]
-                   {
-                       new TernaryButton(rectangularGridSnapToggle, "Grid Snap", () => new SpriteIcon { Icon = OsuIcon.EditorGridSnap })
-                   });
+                   .Append(new TernaryButton(rectangularGridSnapToggle, "Grid Snap", () => new SpriteIcon { Icon = OsuIcon.EditorGridSnap }))
+                   .Concat(DistanceSnapProvider.CreateTernaryButtons());
 
         private BindableList<HitObject> selectedHitObjects;
 
         private Bindable<HitObject> placementObject;
 
         [Cached(typeof(IDistanceSnapProvider))]
-        protected readonly OsuDistanceSnapProvider DistanceSnapProvider = new OsuDistanceSnapProvider();
+        public readonly OsuDistanceSnapProvider DistanceSnapProvider = new OsuDistanceSnapProvider();
 
         [Cached]
         protected readonly OsuGridToolboxGroup OsuGridToolboxGroup = new OsuGridToolboxGroup();
 
         [Cached]
-        protected readonly FreehandSliderToolboxGroup FreehandlSliderToolboxGroup = new FreehandSliderToolboxGroup();
+        protected readonly FreehandSliderToolboxGroup FreehandSliderToolboxGroup = new FreehandSliderToolboxGroup();
 
         [BackgroundDependencyLoader]
         private void load()
@@ -82,13 +80,12 @@ namespace osu.Game.Rulesets.Osu.Edit
             // Give a bit of breathing room around the playfield content.
             PlayfieldContentContainer.Padding = new MarginPadding(10);
 
-            LayerBelowRuleset.AddRange(new Drawable[]
-            {
+            LayerBelowRuleset.Add(
                 distanceSnapGridContainer = new Container
                 {
                     RelativeSizeAxes = Axes.Both
                 }
-            });
+            );
 
             selectedHitObjects = EditorBeatmap.SelectedHitObjects.GetBoundCopy();
             selectedHitObjects.CollectionChanged += (_, _) => updateDistanceSnapGrid();
@@ -109,8 +106,10 @@ namespace osu.Game.Rulesets.Osu.Edit
                     {
                         RotationHandler = BlueprintContainer.SelectionHandler.RotationHandler,
                         ScaleHandler = (OsuSelectionScaleHandler)BlueprintContainer.SelectionHandler.ScaleHandler,
+                        GridToolbox = OsuGridToolboxGroup,
                     },
-                    FreehandlSliderToolboxGroup
+                    new GenerateToolboxGroup(),
+                    FreehandSliderToolboxGroup
                 }
             );
         }
@@ -370,6 +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 = new Vector2(
-                            (direction == Direction.Horizontal ? -1 : 1) * cp.Position.X,
-                            (direction == Direction.Vertical ? -1 : 1) * cp.Position.Y
-                        );
-                    }
+                        cp.Position = GeometryUtils.GetFlippedPosition(flipAxis, controlPointFlipQuad, cp.Position);
                 }
             }
 

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];
-                Debug.Assert(originalInfo.PathControlPointPositions != null && originalInfo.PathControlPointTypes != null);
-                scaleSlider(slider, scale, originalInfo.PathControlPointPositions, originalInfo.PathControlPointTypes);
+                scaleSlider(slider, scale, actualOrigin, objectsInScale[slider], axisRotation);
             }
             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].Type = originalPathTypes[i];
+                slider.Path.ControlPoints[i].Position = GeometryUtils.GetScaledPosition(scale, Vector2.Zero, originalInfo.PathControlPointPositions[i], axisRotation);
+                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;
-            var selectionQuad = OriginalSurroundingQuad.Value;
+            IEnumerable<Vector2> points;
 
-            var tl1 = Vector2.Divide(-actualOrigin, selectionQuad.TopLeft - actualOrigin);
-            var tl2 = Vector2.Divide(OsuPlayfield.BASE_SIZE - actualOrigin, selectionQuad.TopLeft - actualOrigin);
-            var br1 = Vector2.Divide(-actualOrigin, selectionQuad.BottomRight - actualOrigin);
-            var br2 = Vector2.Divide(OsuPlayfield.BASE_SIZE - actualOrigin, selectionQuad.BottomRight - actualOrigin);
+            if (axisRotation == 0)
+            {
+                var selectionQuad = OriginalSurroundingQuad.Value;
+                points = new[]
+                {
+                    selectionQuad.TopLeft,
+                    selectionQuad.TopRight,
+                    selectionQuad.BottomLeft,
+                    selectionQuad.BottomRight
+                };
+            }
+            else
+                points = originalConvexHull!;
 
-            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);
+            foreach (var point in points)
+            {
+                scale = clampToBound(scale, point, Vector2.Zero);
+                scale = clampToBound(scale, point, OsuPlayfield.BASE_SIZE);
+            }
 
             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()