Merge pull request #3644 from smoogipoo/slider-placement

Implement slider placement

.gitignore

@@ -10,6 +10,10 @@
 # User-specific files (MonoDevelop/Xamarin Studio)
 *.userprefs
 
+### Cake ###
+tools/*
+!tools/cakebuild.csproj
+
 # Build results
 bin/[Dd]ebug/
 [Dd]ebugPublic/
@@ -98,6 +102,7 @@ $tf/
 _ReSharper*/
 *.[Rr]e[Ss]harper
 *.DotSettings.user
+inspectcode
 
 # JustCode is a .NET coding add-in
 .JustCode
@@ -257,3 +262,5 @@ paket-files/
 __pycache__/
 *.pyc
 Staging/
+
+inspectcodereport.xml

README.md

@@ -24,7 +24,10 @@ Clone the repository including submodules
 Build and run
 
 - Using Visual Studio 2017, Rider or Visual Studio Code (configurations are included)
-- From command line using `dotnet run --project osu.Desktop`
+- From command line using `dotnet run --project osu.Desktop`. When building for non-development purposes, add `-c Release` to gain higher performance.
+- To run with code analysis, instead use `powershell ./build.ps1` or `build.sh`. This is currently only supported under windows due to [resharper cli shortcomings](https://youtrack.jetbrains.com/issue/RSRP-410004). Alternative, you can install resharper or use rider to get inline support in your IDE of choice.
+
+Note: If you run from command line under linux, you will need to prefix the output folder to your `LD_LIBRARY_PATH`. See `.vscode/launch.json` for an example
 
 If you run into issues building you may need to restore nuget packages (commonly via `dotnet restore`). Visual Studio Code users must run `Restore` task from debug tab before attempt to build.
 

appveyor.yml

@@ -1,22 +1,8 @@
 clone_depth: 1
 version: '{branch}-{build}'
 image: Visual Studio 2017
-configuration: Debug
-cache:
-  - C:\ProgramData\chocolatey\bin -> appveyor.yml
-  - C:\ProgramData\chocolatey\lib -> appveyor.yml
+test: off
 install:
   - cmd: git submodule update --init --recursive --depth=5
-  - cmd: choco install resharper-clt -y
-  - cmd: choco install nvika -y
-  - cmd: dotnet tool install CodeFileSanity --version 0.0.16 --global
-before_build:
-  - cmd: CodeFileSanity
-  - cmd: nuget restore -verbosity quiet
-build:
-  project: osu.sln
-  parallel: true
-  verbosity: minimal
-after_build:
-  - cmd: inspectcode --o="inspectcodereport.xml" --projects:osu.Game* --caches-home="inspectcode" osu.sln > NUL
-  - cmd: NVika parsereport "inspectcodereport.xml" --treatwarningsaserrors
+build_script:
+  - cmd: PowerShell -Version 2.0 .\build.ps1

appveyor_deploy.yml

@@ -1,30 +0,0 @@
-clone_depth: 1
-version: '{build}'
-skip_non_tags: true
-image: Visual Studio 2017
-install:
-  - git clone https://github.com/ppy/osu-deploy
-before_build:
-  - ps: if($env:appveyor_repo_tag -eq 'True') { Update-AppveyorBuild -Version $env:appveyor_repo_tag_name }
-  - cmd: git submodule update --init --recursive --depth=5
-  - cmd: nuget restore -verbosity quiet
-build_script:
-  - ps: iex ((New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/appveyor/secure-file/master/install.ps1'))
-  - appveyor DownloadFile https://puu.sh/A6g5K/4d08705438.enc # signing certificate
-  - cmd: appveyor-tools\secure-file -decrypt 4d08705438.enc -secret %decode_secret% -out %HOMEPATH%\deanherbert.pfx
-  - appveyor DownloadFile https://puu.sh/A6g75/fdc6f19b04.enc # deploy configuration
-  - cd osu-deploy
-  - nuget restore -verbosity quiet
-  - msbuild osu.Desktop.Deploy.csproj
-  - cmd: ..\appveyor-tools\secure-file -decrypt ..\fdc6f19b04.enc -secret %decode_secret% -out bin\Debug\netcoreapp2.1\osu.Desktop.Deploy.dll.config
-  - dotnet bin/Debug/netcoreapp2.1/osu.Desktop.Deploy.dll %code_signing_password% %APPVEYOR_REPO_TAG_NAME%
-environment:
-  decode_secret:
-    secure: i67IC2xj6DjjxmA6Oj2jing3+MwzLkq6CbGsjfZ7rdY=
-  code_signing_password:
-    secure: 34tLNqvjmmZEi97MLKfrnQ==
-artifacts:
-  - path: 'osu-deploy/releases/*'
-deploy:
-  - provider: Environment
-    name: github

build.cake

@@ -0,0 +1,72 @@
+#addin "nuget:?package=CodeFileSanity&version=0.0.21"
+#addin "nuget:?package=JetBrains.ReSharper.CommandLineTools&version=2018.2.2"
+#tool "nuget:?package=NVika.MSBuild&version=1.0.1"
+
+///////////////////////////////////////////////////////////////////////////////
+// ARGUMENTS
+///////////////////////////////////////////////////////////////////////////////
+
+var target = Argument("target", "Build");
+var configuration = Argument("configuration", "Release");
+
+var osuSolution = new FilePath("./osu.sln");
+
+///////////////////////////////////////////////////////////////////////////////
+// TASKS
+///////////////////////////////////////////////////////////////////////////////
+
+Task("Restore")
+    .Does(() => {
+        DotNetCoreRestore(osuSolution.FullPath);
+    });
+
+Task("Compile")
+    .IsDependentOn("Restore")
+    .Does(() => {
+        DotNetCoreBuild(osuSolution.FullPath, new DotNetCoreBuildSettings {
+            Configuration = configuration,
+            NoRestore = true,
+        });
+    });
+
+Task("Test")
+    .IsDependentOn("Compile")
+    .Does(() => {
+        var testAssemblies = GetFiles("**/*.Tests/bin/**/*.Tests.dll");
+
+        DotNetCoreVSTest(testAssemblies, new DotNetCoreVSTestSettings {
+            Logger = AppVeyor.IsRunningOnAppVeyor ? "Appveyor" : $"trx",
+            Parallel = true,
+            ToolTimeout = TimeSpan.FromMinutes(10),
+        });
+    });
+
+// windows only because both inspectcore and nvika depend on net45
+Task("InspectCode")
+    .WithCriteria(IsRunningOnWindows())
+    .IsDependentOn("Compile")
+    .Does(() => {
+        var nVikaToolPath = GetFiles("./tools/NVika.MSBuild.*/tools/NVika.exe").First();
+
+        InspectCode(osuSolution, new InspectCodeSettings {
+            CachesHome = "inspectcode",
+            OutputFile = "inspectcodereport.xml",
+        });
+
+        StartProcess(nVikaToolPath, @"parsereport ""inspectcodereport.xml"" --treatwarningsaserrors");
+    });
+
+Task("CodeFileSanity")
+    .Does(() => {
+        ValidateCodeSanity(new ValidateCodeSanitySettings {
+            RootDirectory = ".",
+            IsAppveyorBuild = AppVeyor.IsRunningOnAppVeyor
+        });
+    });
+
+Task("Build")
+    .IsDependentOn("CodeFileSanity")
+    .IsDependentOn("InspectCode")
+    .IsDependentOn("Test");
+
+RunTarget(target);

build.ps1

@@ -0,0 +1,79 @@
+##########################################################################
+# This is a customized Cake bootstrapper script for PowerShell.
+##########################################################################
+
+<#
+
+.SYNOPSIS
+This is a Powershell script to bootstrap a Cake build.
+
+.DESCRIPTION
+This Powershell script restores NuGet tools (including Cake)
+and execute your Cake build script with the parameters you provide.
+
+.PARAMETER Script
+The build script to execute.
+.PARAMETER Target
+The build script target to run.
+.PARAMETER Configuration
+The build configuration to use.
+.PARAMETER Verbosity
+Specifies the amount of information to be displayed.
+.PARAMETER ShowDescription
+Shows description about tasks.
+.PARAMETER DryRun
+Performs a dry run.
+.PARAMETER ScriptArgs
+Remaining arguments are added here.
+
+.LINK
+https://cakebuild.net
+
+#>
+
+[CmdletBinding()]
+Param(
+    [string]$Script = "build.cake",
+    [string]$Target,
+    [string]$Configuration,
+    [ValidateSet("Quiet", "Minimal", "Normal", "Verbose", "Diagnostic")]
+    [string]$Verbosity,
+    [switch]$ShowDescription,
+    [Alias("WhatIf", "Noop")]
+    [switch]$DryRun,
+    [Parameter(Position=0,Mandatory=$false,ValueFromRemainingArguments=$true)]
+    [string[]]$ScriptArgs
+)
+
+Write-Host "Preparing to run build script..."
+
+# Determine the script root for resolving other paths.
+if(!$PSScriptRoot){
+    $PSScriptRoot = Split-Path $MyInvocation.MyCommand.Path -Parent
+}
+
+# Resolve the paths for resources used for debugging.
+$TOOLS_DIR = Join-Path $PSScriptRoot "tools"
+$CAKE_CSPROJ = Join-Path $TOOLS_DIR "cakebuild.csproj"
+
+# Install the required tools locally.
+Write-Host "Restoring cake tools..."
+Invoke-Expression "dotnet restore `"$CAKE_CSPROJ`" --packages `"$TOOLS_DIR`"" | Out-Null
+
+# Find the Cake executable
+$CAKE_EXECUTABLE = (Get-ChildItem -Path ./tools/cake.coreclr/ -Filter Cake.dll -Recurse).FullName
+
+# Build Cake arguments
+$cakeArguments = @("$Script");
+if ($Target) { $cakeArguments += "-target=$Target" }
+if ($Configuration) { $cakeArguments += "-configuration=$Configuration" }
+if ($Verbosity) { $cakeArguments += "-verbosity=$Verbosity" }
+if ($ShowDescription) { $cakeArguments += "-showdescription" }
+if ($DryRun) { $cakeArguments += "-dryrun" }
+if ($Experimental) { $cakeArguments += "-experimental" }
+$cakeArguments += $ScriptArgs
+
+# Start Cake
+Write-Host "Running build script..."
+Invoke-Expression "dotnet `"$CAKE_EXECUTABLE`" $cakeArguments"
+exit $LASTEXITCODE

build.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+##########################################################################
+# This is a customized Cake bootstrapper script for Shell.
+##########################################################################
+
+echo "Preparing to run build script..."
+
+SCRIPT_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+TOOLS_DIR=$SCRIPT_DIR/tools
+CAKE_BINARY_PATH=$TOOLS_DIR/"cake.coreclr"
+
+SCRIPT="build.cake"
+CAKE_CSPROJ=$TOOLS_DIR/"cakebuild.csproj"
+
+# Parse arguments.
+CAKE_ARGUMENTS=()
+for i in "$@"; do
+    case $1 in
+        -s|--script) SCRIPT="$2"; shift ;;
+        --) shift; CAKE_ARGUMENTS+=("$@"); break ;;
+        *) CAKE_ARGUMENTS+=("$1") ;;
+    esac
+    shift
+done
+
+# Install the required tools locally.
+echo "Restoring cake tools..."
+dotnet restore $CAKE_CSPROJ --packages $TOOLS_DIR > /dev/null 2>&1
+
+# Search for the CakeBuild binary.
+CAKE_BINARY=$(find $CAKE_BINARY_PATH -name "Cake.dll")
+
+# Start Cake
+echo "Running build script..."
+
+dotnet "$CAKE_BINARY" $SCRIPT "${CAKE_ARGUMENTS[@]}"

cake.config

@@ -0,0 +1,5 @@
+
+[Nuget]
+Source=https://api.nuget.org/v3/index.json
+UseInProcessClient=true
+LoadDependencies=true

osu.Desktop/Overlays/VersionManager.cs

@@ -27,9 +27,6 @@ namespace osu.Desktop.Overlays
         private NotificationOverlay notificationOverlay;
         private GameHost host;
 
-        public override bool HandleKeyboardInput => false;
-        public override bool HandleMouseInput => false;
-
         [BackgroundDependencyLoader]
         private void load(NotificationOverlay notification, OsuColour colours, TextureStore textures, OsuGameBase game, OsuConfigManager config, GameHost host)
         {

osu.Desktop/Program.cs

@@ -4,7 +4,11 @@
 using System;
 using System.IO;
 using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
 using osu.Framework;
+using osu.Framework.Development;
+using osu.Framework.Logging;
 using osu.Framework.Platform;
 using osu.Game.IPC;
 
@@ -20,6 +24,8 @@ namespace osu.Desktop
 
             using (DesktopGameHost host = Host.GetSuitableHost(@"osu", true))
             {
+                host.ExceptionThrown += handleException;
+
                 if (!host.IsPrimaryInstance)
                 {
                     var importer = new ArchiveImportIPCChannel(host);
@@ -45,5 +51,24 @@ namespace osu.Desktop
                 return 0;
             }
         }
+
+        private static int allowableExceptions = DebugUtils.IsDebugBuild ? 0 : 1;
+
+        /// <summary>
+        /// Allow a maximum of one unhandled exception, per second of execution.
+        /// </summary>
+        /// <param name="arg"></param>
+        /// <returns></returns>
+        private static bool handleException(Exception arg)
+        {
+            bool continueExecution = Interlocked.Decrement(ref allowableExceptions) >= 0;
+
+            Logger.Log($"Unhandled exception has been {(continueExecution ? $"allowed with {allowableExceptions} more allowable exceptions" : "denied")} .");
+
+            // restore the stock of allowable exceptions after a short delay.
+            Task.Delay(1000).ContinueWith(_ => Interlocked.Increment(ref allowableExceptions));
+
+            return continueExecution;
+        }
     }
 }

osu.Desktop/osu.Desktop.csproj

@@ -27,9 +27,9 @@
   </ItemGroup>
   <ItemGroup Label="Package References">
     <PackageReference Include="System.IO.Packaging" Version="4.5.0" />
-    <PackageReference Include="ppy.squirrel.windows" Version="1.8.0.3" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.1" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.1.1" />
+    <PackageReference Include="ppy.squirrel.windows" Version="1.9.0.2" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.1.4" />
   </ItemGroup>
   <ItemGroup Label="Resources">
     <EmbeddedResource Include="lazer.ico" />

osu.Game.Rulesets.Catch.Tests/TestCaseAutoJuiceStream.cs

@@ -1,7 +1,6 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using System.Collections.Generic;
 using System.Linq;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
@@ -38,12 +37,12 @@ namespace osu.Game.Rulesets.Catch.Tests
                 beatmap.HitObjects.Add(new JuiceStream
                 {
                     X = 0.5f - width / 2,
-                    ControlPoints = new List<Vector2>
+                    ControlPoints = new[]
                     {
                         Vector2.Zero,
                         new Vector2(width * CatchPlayfield.BASE_WIDTH, 0)
                     },
-                    CurveType = CurveType.Linear,
+                    PathType = PathType.Linear,
                     Distance = width * CatchPlayfield.BASE_WIDTH,
                     StartTime = i * 2000,
                     NewCombo = i % 8 == 0

osu.Game.Rulesets.Catch.Tests/osu.Game.Rulesets.Catch.Tests.csproj

@@ -2,9 +2,10 @@
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.8.0" />
-    <PackageReference Include="NUnit" Version="3.10.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Include="NUnit" Version="3.11.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.10.0" />
+    <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>

osu.Game.Rulesets.Catch/Beatmaps/CatchBeatmapConverter.cs

@@ -35,12 +35,13 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
                     StartTime = obj.StartTime,
                     Samples = obj.Samples,
                     ControlPoints = curveData.ControlPoints,
-                    CurveType = curveData.CurveType,
+                    PathType = curveData.PathType,
                     Distance = curveData.Distance,
                     RepeatSamples = curveData.RepeatSamples,
                     RepeatCount = curveData.RepeatCount,
                     X = (positionData?.X ?? 0) / CatchPlayfield.BASE_WIDTH,
                     NewCombo = comboData?.NewCombo ?? false,
+                    ComboOffset = comboData?.ComboOffset ?? 0,
                     LegacyLastTickOffset = legacyOffset?.LegacyLastTickOffset ?? 0
                 };
             }
@@ -51,7 +52,8 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
                     StartTime = obj.StartTime,
                     Samples = obj.Samples,
                     Duration = endTime.Duration,
-                    NewCombo = comboData?.NewCombo ?? false
+                    NewCombo = comboData?.NewCombo ?? false,
+                    ComboOffset = comboData?.ComboOffset ?? 0,
                 };
             }
             else
@@ -61,6 +63,7 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
                     StartTime = obj.StartTime,
                     Samples = obj.Samples,
                     NewCombo = comboData?.NewCombo ?? false,
+                    ComboOffset = comboData?.ComboOffset ?? 0,
                     X = (positionData?.X ?? 0) / CatchPlayfield.BASE_WIDTH
                 };
             }

osu.Game.Rulesets.Catch/Beatmaps/CatchBeatmapProcessor.cs

@@ -74,42 +74,42 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
 
         private void initialiseHyperDash(List<CatchHitObject> objects)
         {
-            // todo: add difficulty adjust.
-            double halfCatcherWidth = CatcherArea.CATCHER_SIZE * (objects.FirstOrDefault()?.Scale ?? 1) / CatchPlayfield.BASE_WIDTH / 2;
+            List<CatchHitObject> objectWithDroplets = new List<CatchHitObject>();
 
+            foreach (var currentObject in objects)
+            {
+                if (currentObject is Fruit)
+                    objectWithDroplets.Add(currentObject);
+                if (currentObject is JuiceStream)
+                    foreach (var currentJuiceElement in currentObject.NestedHitObjects)
+                        if (!(currentJuiceElement is TinyDroplet))
+                            objectWithDroplets.Add((CatchHitObject)currentJuiceElement);
+            }
+
+            objectWithDroplets.Sort((h1, h2) => h1.StartTime.CompareTo(h2.StartTime));
+
+            double halfCatcherWidth = CatcherArea.GetCatcherSize(Beatmap.BeatmapInfo.BaseDifficulty) / 2;
             int lastDirection = 0;
             double lastExcess = halfCatcherWidth;
 
-            int objCount = objects.Count;
-
-            for (int i = 0; i < objCount - 1; i++)
+            for (int i = 0; i < objectWithDroplets.Count - 1; i++)
             {
-                CatchHitObject currentObject = objects[i];
-
-                // not needed?
-                // if (currentObject is TinyDroplet) continue;
-
-                CatchHitObject nextObject = objects[i + 1];
-
-                // while (nextObject is TinyDroplet)
-                // {
-                //     if (++i == objCount - 1) break;
-                //     nextObject = objects[i + 1];
-                // }
+                CatchHitObject currentObject = objectWithDroplets[i];
+                CatchHitObject nextObject = objectWithDroplets[i + 1];
 
                 int thisDirection = nextObject.X > currentObject.X ? 1 : -1;
-                double timeToNext = nextObject.StartTime - ((currentObject as IHasEndTime)?.EndTime ?? currentObject.StartTime) - 4;
+                double timeToNext = nextObject.StartTime - currentObject.StartTime;
                 double distanceToNext = Math.Abs(nextObject.X - currentObject.X) - (lastDirection == thisDirection ? lastExcess : halfCatcherWidth);
-
-                if (timeToNext * CatcherArea.Catcher.BASE_SPEED < distanceToNext)
+                float distanceToHyper = (float)(timeToNext * CatcherArea.Catcher.BASE_SPEED - distanceToNext);
+                if (distanceToHyper < 0)
                 {
                     currentObject.HyperDashTarget = nextObject;
                     lastExcess = halfCatcherWidth;
                 }
                 else
                 {
-                    //currentObject.DistanceToHyperDash = timeToNext - distanceToNext;
-                    lastExcess = MathHelper.Clamp(timeToNext - distanceToNext, 0, halfCatcherWidth);
+                    currentObject.DistanceToHyperDash = distanceToHyper;
+                    lastExcess = MathHelper.Clamp(distanceToHyper, 0, halfCatcherWidth);
                 }
 
                 lastDirection = thisDirection;

osu.Game.Rulesets.Catch/Judgements/CatchBananaJudgement.cs

@@ -1,6 +1,7 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Scoring;
 
 namespace osu.Game.Rulesets.Catch.Judgements
@@ -9,8 +10,6 @@ namespace osu.Game.Rulesets.Catch.Judgements
     {
         public override bool AffectsCombo => false;
 
-        public override bool ShouldExplode => true;
-
         protected override int NumericResultFor(HitResult result)
         {
             switch (result)
@@ -32,5 +31,7 @@ namespace osu.Game.Rulesets.Catch.Judgements
                     return 8;
             }
         }
+
+        public override bool ShouldExplodeFor(JudgementResult result) => true;
     }
 }

osu.Game.Rulesets.Catch/Judgements/CatchJudgement.cs

@@ -23,21 +23,10 @@ namespace osu.Game.Rulesets.Catch.Judgements
         }
 
         /// <summary>
-        /// The base health increase for the result achieved.
+        /// Retrieves the numeric health increase of a <see cref="HitResult"/>.
         /// </summary>
-        public float HealthIncrease => HealthIncreaseFor(Result);
-
-        /// <summary>
-        /// Whether fruit on the platter should explode or drop.
-        /// Note that this is only checked if the owning object is also <see cref="IHasComboInformation.LastInCombo" />
-        /// </summary>
-        public virtual bool ShouldExplode => IsHit;
-
-        /// <summary>
-        /// Convert a <see cref="HitResult"/> to a base health increase.
-        /// </summary>
-        /// <param name="result">The value to convert.</param>
-        /// <returns>The base health increase.</returns>
+        /// <param name="result">The <see cref="HitResult"/> to find the numeric health increase for.</param>
+        /// <returns>The numeric health increase of <paramref name="result"/>.</returns>
         protected virtual float HealthIncreaseFor(HitResult result)
         {
             switch (result)
@@ -48,5 +37,18 @@ namespace osu.Game.Rulesets.Catch.Judgements
                     return 10.2f;
             }
         }
+
+        /// <summary>
+        /// Retrieves the numeric health increase of a <see cref="JudgementResult"/>.
+        /// </summary>
+        /// <param name="result">The <see cref="JudgementResult"/> to find the numeric health increase for.</param>
+        /// <returns>The numeric health increase of <paramref name="result"/>.</returns>
+        public float HealthIncreaseFor(JudgementResult result) => HealthIncreaseFor(result.Type);
+
+        /// <summary>
+        /// Whether fruit on the platter should explode or drop.
+        /// Note that this is only checked if the owning object is also <see cref="IHasComboInformation.LastInCombo" />
+        /// </summary>
+        public virtual bool ShouldExplodeFor(JudgementResult result) => result.IsHit;
     }
 }

osu.Game.Rulesets.Catch/Objects/Banana.cs

@@ -1,10 +1,15 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Game.Rulesets.Catch.Judgements;
+using osu.Game.Rulesets.Judgements;
+
 namespace osu.Game.Rulesets.Catch.Objects
 {
     public class Banana : Fruit
     {
         public override FruitVisualRepresentation VisualRepresentation => FruitVisualRepresentation.Banana;
+
+        public override Judgement CreateJudgement() => new CatchBananaJudgement();
     }
 }

osu.Game.Rulesets.Catch/Objects/CatchHitObject.cs

@@ -16,16 +16,20 @@ namespace osu.Game.Rulesets.Catch.Objects
 
         public int IndexInBeatmap { get; set; }
 
-        public virtual FruitVisualRepresentation VisualRepresentation => (FruitVisualRepresentation)(IndexInBeatmap % 4);
+        public virtual FruitVisualRepresentation VisualRepresentation => (FruitVisualRepresentation)(ComboIndex % 4);
 
         public virtual bool NewCombo { get; set; }
 
+        public int ComboOffset { get; set; }
+
         public int IndexInCurrentCombo { get; set; }
 
         public int ComboIndex { get; set; }
 
         /// <summary>
-        /// The distance for a fruit to to next hyper if it's not a hyper.
+        /// Difference between the distance to the next object
+        /// and the distance that would have triggered a hyper dash.
+        /// A value close to 0 indicates a difficult jump (for difficulty calculation).
         /// </summary>
         public float DistanceToHyperDash { get; set; }
 

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

@@ -1,8 +1,6 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using osu.Game.Rulesets.Catch.Judgements;
-
 namespace osu.Game.Rulesets.Catch.Objects.Drawable
 {
     public class DrawableBanana : DrawableFruit
@@ -11,7 +9,5 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
             : base(h)
         {
         }
-
-        protected override CatchJudgement CreateJudgement() => new CatchBananaJudgement();
     }
 }

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableBananaShower.cs

@@ -26,8 +26,6 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
                 AddNested(getVisualRepresentation?.Invoke(b));
         }
 
-        protected override bool ProvidesJudgement => false;
-
         protected override void AddNested(DrawableHitObject h)
         {
             ((DrawableCatchHitObject)h).CheckPosition = o => CheckPosition?.Invoke(o) ?? false;

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableCatchHitObject.cs

@@ -5,7 +5,6 @@ using System;
 using OpenTK;
 using OpenTK.Graphics;
 using osu.Framework.Graphics;
-using osu.Game.Rulesets.Catch.Judgements;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Scoring;
@@ -53,20 +52,14 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
 
         public Func<CatchHitObject, bool> CheckPosition;
 
-        protected override void CheckForJudgements(bool userTriggered, double timeOffset)
+        protected override void CheckForResult(bool userTriggered, double timeOffset)
         {
             if (CheckPosition == null) return;
 
-            if (timeOffset >= 0)
-            {
-                var judgement = CreateJudgement();
-                judgement.Result = CheckPosition.Invoke(HitObject) ? HitResult.Perfect : HitResult.Miss;
-                AddJudgement(judgement);
-            }
+            if (timeOffset >= 0 && Result != null)
+                ApplyResult(r => r.Type = CheckPosition.Invoke(HitObject) ? HitResult.Perfect : HitResult.Miss);
         }
 
-        protected virtual CatchJudgement CreateJudgement() => new CatchJudgement();
-
         protected override void SkinChanged(ISkinSource skin, bool allowFallback)
         {
             base.SkinChanged(skin, allowFallback);

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

@@ -6,7 +6,6 @@ using osu.Framework.Graphics;
 using osu.Game.Rulesets.Catch.Objects.Drawable.Pieces;
 using OpenTK;
 using OpenTK.Graphics;
-using osu.Game.Rulesets.Catch.Judgements;
 
 namespace osu.Game.Rulesets.Catch.Objects.Drawable
 {
@@ -24,8 +23,6 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
             Masking = false;
         }
 
-        protected override CatchJudgement CreateJudgement() => new CatchDropletJudgement();
-
         [BackgroundDependencyLoader]
         private void load()
         {

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableJuiceStream.cs

@@ -26,8 +26,6 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
                 AddNested(getVisualRepresentation?.Invoke(o));
         }
 
-        protected override bool ProvidesJudgement => false;
-
         protected override void AddNested(DrawableHitObject h)
         {
             var catchObject = (DrawableCatchHitObject)h;

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableTinyDroplet.cs

@@ -2,18 +2,15 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using OpenTK;
-using osu.Game.Rulesets.Catch.Judgements;
 
 namespace osu.Game.Rulesets.Catch.Objects.Drawable
 {
     public class DrawableTinyDroplet : DrawableDroplet
     {
-        public DrawableTinyDroplet(Droplet h)
+        public DrawableTinyDroplet(TinyDroplet h)
             : base(h)
         {
             Size = new Vector2((float)CatchHitObject.OBJECT_RADIUS) / 8;
         }
-
-        protected override CatchJudgement CreateJudgement() => new CatchTinyDropletJudgement();
     }
 }

osu.Game.Rulesets.Catch/Objects/Droplet.cs

@@ -1,9 +1,13 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Game.Rulesets.Catch.Judgements;
+using osu.Game.Rulesets.Judgements;
+
 namespace osu.Game.Rulesets.Catch.Objects
 {
     public class Droplet : CatchHitObject
     {
+        public override Judgement CreateJudgement() => new CatchDropletJudgement();
     }
 }

osu.Game.Rulesets.Catch/Objects/Fruit.cs

@@ -1,9 +1,13 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Game.Rulesets.Catch.Judgements;
+using osu.Game.Rulesets.Judgements;
+
 namespace osu.Game.Rulesets.Catch.Objects
 {
     public class Fruit : CatchHitObject
     {
+        public override Judgement CreateJudgement() => new CatchJudgement();
     }
 }

osu.Game.Rulesets.Catch/Objects/JuiceStream.cs

@@ -50,7 +50,7 @@ namespace osu.Game.Rulesets.Catch.Objects
             if (TickDistance == 0)
                 return;
 
-            var length = Curve.Distance;
+            var length = Path.Distance;
             var tickDistance = Math.Min(TickDistance, length);
             var spanDuration = length / Velocity;
 
@@ -95,7 +95,7 @@ namespace osu.Game.Rulesets.Catch.Objects
                         AddNested(new TinyDroplet
                         {
                             StartTime = t,
-                            X = X + Curve.PositionAt(progress).X / CatchPlayfield.BASE_WIDTH,
+                            X = X + Path.PositionAt(progress).X / CatchPlayfield.BASE_WIDTH,
                             Samples = new List<SampleInfo>(Samples.Select(s => new SampleInfo
                             {
                                 Bank = s.Bank,
@@ -110,7 +110,7 @@ namespace osu.Game.Rulesets.Catch.Objects
                         AddNested(new Droplet
                         {
                             StartTime = time,
-                            X = X + Curve.PositionAt(distanceProgress).X / CatchPlayfield.BASE_WIDTH,
+                            X = X + Path.PositionAt(distanceProgress).X / CatchPlayfield.BASE_WIDTH,
                             Samples = new List<SampleInfo>(Samples.Select(s => new SampleInfo
                             {
                                 Bank = s.Bank,
@@ -127,12 +127,12 @@ namespace osu.Game.Rulesets.Catch.Objects
                 {
                     Samples = Samples,
                     StartTime = spanStartTime + spanDuration,
-                    X = X + Curve.PositionAt(reversed ? 0 : 1).X / CatchPlayfield.BASE_WIDTH
+                    X = X + Path.PositionAt(reversed ? 0 : 1).X / CatchPlayfield.BASE_WIDTH
                 });
             }
         }
 
-        public double EndTime => StartTime + this.SpanCount() * Curve.Distance / Velocity;
+        public double EndTime => StartTime + this.SpanCount() * Path.Distance / Velocity;
 
         public float EndX => X + this.CurvePositionAt(1).X / CatchPlayfield.BASE_WIDTH;
 
@@ -140,24 +140,24 @@ namespace osu.Game.Rulesets.Catch.Objects
 
         public double Distance
         {
-            get { return Curve.Distance; }
-            set { Curve.Distance = value; }
+            get { return Path.Distance; }
+            set { Path.Distance = value; }
         }
 
-        public SliderCurve Curve { get; } = new SliderCurve();
+        public SliderPath Path { get; } = new SliderPath();
 
-        public List<Vector2> ControlPoints
+        public Vector2[] ControlPoints
         {
-            get { return Curve.ControlPoints; }
-            set { Curve.ControlPoints = value; }
+            get { return Path.ControlPoints; }
+            set { Path.ControlPoints = value; }
         }
 
         public List<List<SampleInfo>> RepeatSamples { get; set; } = new List<List<SampleInfo>>();
 
-        public CurveType CurveType
+        public PathType PathType
         {
-            get { return Curve.CurveType; }
-            set { Curve.CurveType = value; }
+            get { return Path.PathType; }
+            set { Path.PathType = value; }
         }
 
         public double? LegacyLastTickOffset { get; set; }

osu.Game.Rulesets.Catch/Objects/TinyDroplet.cs

@@ -1,9 +1,13 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Game.Rulesets.Catch.Judgements;
+using osu.Game.Rulesets.Judgements;
+
 namespace osu.Game.Rulesets.Catch.Objects
 {
     public class TinyDroplet : Droplet
     {
+        public override Judgement CreateJudgement() => new CatchTinyDropletJudgement();
     }
 }

osu.Game.Rulesets.Catch/Scoring/CatchScoreProcessor.cs

@@ -2,7 +2,6 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
-using System.Linq;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Judgements;
 using osu.Game.Rulesets.Catch.Objects;
@@ -21,55 +20,28 @@ namespace osu.Game.Rulesets.Catch.Scoring
 
         private float hpDrainRate;
 
-        protected override void SimulateAutoplay(Beatmap<CatchHitObject> beatmap)
+        protected override void ApplyBeatmap(Beatmap<CatchHitObject> beatmap)
         {
-            hpDrainRate = beatmap.BeatmapInfo.BaseDifficulty.DrainRate;
+            base.ApplyBeatmap(beatmap);
 
-            foreach (var obj in beatmap.HitObjects)
-            {
-                switch (obj)
-                {
-                    case JuiceStream stream:
-                        foreach (var nestedObject in stream.NestedHitObjects)
-                            switch (nestedObject)
-                            {
-                                case TinyDroplet _:
-                                    AddJudgement(new CatchTinyDropletJudgement { Result = HitResult.Perfect });
-                                    break;
-                                case Droplet _:
-                                    AddJudgement(new CatchDropletJudgement { Result = HitResult.Perfect });
-                                    break;
-                                case Fruit _:
-                                    AddJudgement(new CatchJudgement { Result = HitResult.Perfect });
-                                    break;
-                            }
-                        break;
-                    case BananaShower shower:
-                        foreach (var _ in shower.NestedHitObjects.Cast<CatchHitObject>())
-                            AddJudgement(new CatchBananaJudgement { Result = HitResult.Perfect });
-                        break;
-                    case Fruit _:
-                        AddJudgement(new CatchJudgement { Result = HitResult.Perfect });
-                        break;
-                }
-            }
+            hpDrainRate = beatmap.BeatmapInfo.BaseDifficulty.DrainRate;
         }
 
         private const double harshness = 0.01;
 
-        protected override void OnNewJudgement(Judgement judgement)
+        protected override void ApplyResult(JudgementResult result)
         {
-            base.OnNewJudgement(judgement);
+            base.ApplyResult(result);
 
-            if (judgement.Result == HitResult.Miss)
+            if (result.Type == HitResult.Miss)
             {
-                if (!judgement.IsBonus)
+                if (!result.Judgement.IsBonus)
                     Health.Value -= hpDrainRate * (harshness * 2);
                 return;
             }
 
-            if (judgement is CatchJudgement catchJudgement)
-                Health.Value += Math.Max(catchJudgement.HealthIncrease - hpDrainRate, 0) * harshness;
+            if (result.Judgement is CatchJudgement catchJudgement)
+                Health.Value += Math.Max(catchJudgement.HealthIncreaseFor(result) - hpDrainRate, 0) * harshness;
         }
     }
 }

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

@@ -5,11 +5,13 @@ using System;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Beatmaps;
+using osu.Game.Configuration;
 using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Catch.Objects.Drawable;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.UI.Scrolling;
+using OpenTK;
 
 namespace osu.Game.Rulesets.Catch.UI
 {
@@ -17,13 +19,13 @@ namespace osu.Game.Rulesets.Catch.UI
     {
         public const float BASE_WIDTH = 512;
 
-        protected override Container<Drawable> Content => content;
-        private readonly Container<Drawable> content;
-
         private readonly CatcherArea catcherArea;
 
+        protected override bool UserScrollSpeedAdjustment => false;
+
+        protected override SpeedChangeVisualisationMethod VisualisationMethod => SpeedChangeVisualisationMethod.Constant;
+
         public CatchPlayfield(BeatmapDifficulty difficulty, Func<CatchHitObject, DrawableHitObject<CatchHitObject>> getVisualRepresentation)
-            : base(BASE_WIDTH)
         {
             Direction.Value = ScrollingDirection.Down;
 
@@ -32,34 +34,36 @@ namespace osu.Game.Rulesets.Catch.UI
             Anchor = Anchor.TopCentre;
             Origin = Anchor.TopCentre;
 
-            base.Content.Anchor = Anchor.BottomLeft;
-            base.Content.Origin = Anchor.BottomLeft;
+            Size = new Vector2(0.86f); // matches stable's vertical offset for catcher plate
 
-            base.Content.AddRange(new Drawable[]
+            InternalChild = new PlayfieldAdjustmentContainer
             {
-                explodingFruitContainer = new Container
+                RelativeSizeAxes = Axes.Both,
+                Children = new Drawable[]
                 {
-                    RelativeSizeAxes = Axes.Both,
-                },
-                catcherArea = new CatcherArea(difficulty)
-                {
-                    GetVisualRepresentation = getVisualRepresentation,
-                    ExplodingFruitTarget = explodingFruitContainer,
-                    Anchor = Anchor.BottomLeft,
-                    Origin = Anchor.TopLeft,
-                },
-                content = new Container<Drawable>
-                {
-                    RelativeSizeAxes = Axes.Both,
-                },
-            });
+                    explodingFruitContainer = new Container
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                    },
+                    catcherArea = new CatcherArea(difficulty)
+                    {
+                        GetVisualRepresentation = getVisualRepresentation,
+                        ExplodingFruitTarget = explodingFruitContainer,
+                        Anchor = Anchor.BottomLeft,
+                        Origin = Anchor.TopLeft,
+                    },
+                    HitObjectContainer
+                }
+            };
+
+            VisibleTimeRange.Value = BeatmapDifficulty.DifficultyRange(difficulty.ApproachRate, 1800, 1200, 450);
         }
 
         public bool CheckIfWeCanCatch(CatchHitObject obj) => catcherArea.AttemptCatch(obj);
 
         public override void Add(DrawableHitObject h)
         {
-            h.OnJudgement += onJudgement;
+            h.OnNewResult += onNewResult;
 
             base.Add(h);
 
@@ -67,6 +71,7 @@ namespace osu.Game.Rulesets.Catch.UI
             fruit.CheckPosition = CheckIfWeCanCatch;
         }
 
-        private void onJudgement(DrawableHitObject judgedObject, Judgement judgement) => catcherArea.OnJudgement((DrawableCatchHitObject)judgedObject, judgement);
+        private void onNewResult(DrawableHitObject judgedObject, JudgementResult result)
+            => catcherArea.OnResult((DrawableCatchHitObject)judgedObject, result);
     }
 }

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

@@ -13,7 +13,6 @@ using osu.Game.Rulesets.Replays;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI;
 using osu.Game.Rulesets.UI.Scrolling;
-using OpenTK;
 
 namespace osu.Game.Rulesets.Catch.UI
 {
@@ -32,9 +31,7 @@ namespace osu.Game.Rulesets.Catch.UI
 
         public override PassThroughInputManager CreateInputManager() => new CatchInputManager(Ruleset.RulesetInfo);
 
-        protected override Vector2 PlayfieldArea => new Vector2(0.86f); // matches stable's vertical offset for catcher plate
-
-        protected override DrawableHitObject<CatchHitObject> GetVisualRepresentation(CatchHitObject h)
+        public override DrawableHitObject<CatchHitObject> GetVisualRepresentation(CatchHitObject h)
         {
             switch (h)
             {

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

@@ -25,7 +25,7 @@ namespace osu.Game.Rulesets.Catch.UI
 {
     public class CatcherArea : Container
     {
-        public const float CATCHER_SIZE = 84;
+        public const float CATCHER_SIZE = 100;
 
         protected readonly Catcher MovableCatcher;
 
@@ -48,7 +48,7 @@ namespace osu.Game.Rulesets.Catch.UI
 
         private DrawableCatchHitObject lastPlateableFruit;
 
-        public void OnJudgement(DrawableCatchHitObject fruit, Judgement judgement)
+        public void OnResult(DrawableCatchHitObject fruit, JudgementResult result)
         {
             void runAfterLoaded(Action action)
             {
@@ -63,7 +63,7 @@ namespace osu.Game.Rulesets.Catch.UI
                     lastPlateableFruit.OnLoadComplete = _ => action();
             }
 
-            if (judgement.IsHit && fruit.CanBePlated)
+            if (result.IsHit && fruit.CanBePlated)
             {
                 var caughtFruit = (DrawableCatchHitObject)GetVisualRepresentation?.Invoke(fruit.HitObject);
 
@@ -86,7 +86,7 @@ namespace osu.Game.Rulesets.Catch.UI
 
             if (fruit.HitObject.LastInCombo)
             {
-                if (((CatchJudgement)judgement).ShouldExplode)
+                if (((CatchJudgement)result.Judgement).ShouldExplodeFor(result))
                     runAfterLoaded(() => MovableCatcher.Explode());
                 else
                     MovableCatcher.Drop();
@@ -107,6 +107,11 @@ namespace osu.Game.Rulesets.Catch.UI
 
         public bool AttemptCatch(CatchHitObject obj) => MovableCatcher.AttemptCatch(obj);
 
+        public static float GetCatcherSize(BeatmapDifficulty difficulty)
+        {
+            return CATCHER_SIZE / CatchPlayfield.BASE_WIDTH * (1.0f - 0.7f * (difficulty.CircleSize - 5) / 5);
+        }
+
         public class Catcher : Container, IKeyBindingHandler<CatchAction>
         {
             /// <summary>
@@ -407,9 +412,7 @@ namespace osu.Game.Rulesets.Catch.UI
             /// </summary>
             public void Explode()
             {
-                var fruit = caughtFruit.ToArray();
-
-                foreach (var f in fruit)
+                foreach (var f in caughtFruit.ToArray())
                     Explode(f);
             }
 
@@ -422,15 +425,15 @@ namespace osu.Game.Rulesets.Catch.UI
                     fruit.Anchor = Anchor.TopLeft;
                     fruit.Position = caughtFruit.ToSpaceOfOtherDrawable(fruit.DrawPosition, ExplodingFruitTarget);
 
-                    caughtFruit.Remove(fruit);
+                    if (!caughtFruit.Remove(fruit))
+                        // we may have already been removed by a previous operation (due to the weird OnLoadComplete scheduling).
+                        // this avoids a crash on potentially attempting to Add a fruit to ExplodingFruitTarget twice.
+                        return;
 
                     ExplodingFruitTarget.Add(fruit);
                 }
 
-                fruit.MoveToY(fruit.Y - 50, 250, Easing.OutSine)
-                 .Then()
-                 .MoveToY(fruit.Y + 50, 500, Easing.InSine);
-
+                fruit.MoveToY(fruit.Y - 50, 250, Easing.OutSine).Then().MoveToY(fruit.Y + 50, 500, Easing.InSine);
                 fruit.MoveToX(fruit.X + originalX * 6, 1000);
                 fruit.FadeOut(750);
 

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

@@ -0,0 +1,42 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Catch.UI
+{
+    public class PlayfieldAdjustmentContainer : Container
+    {
+        protected override Container<Drawable> Content => content;
+        private readonly Container content;
+
+        public PlayfieldAdjustmentContainer()
+        {
+            InternalChild = new Container
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                RelativeSizeAxes = Axes.Both,
+                FillMode = FillMode.Fit,
+                FillAspectRatio = 4f / 3,
+                Child = content = new ScalingContainer { RelativeSizeAxes = Axes.Both }
+            };
+        }
+
+        /// <summary>
+        /// A <see cref="Container"/> which scales its content relative to a target width.
+        /// </summary>
+        private class ScalingContainer : Container
+        {
+            protected override void Update()
+            {
+                base.Update();
+
+                Scale = new Vector2(Parent.ChildSize.X / CatchPlayfield.BASE_WIDTH);
+                Size = Vector2.Divide(Vector2.One, Scale);
+            }
+        }
+    }
+}

osu.Game.Rulesets.Mania.Tests/ScrollingTestContainer.cs

@@ -14,24 +14,20 @@ namespace osu.Game.Rulesets.Mania.Tests
     /// </summary>
     public class ScrollingTestContainer : Container
     {
-        private readonly ScrollingDirection direction;
+        [Cached(Type = typeof(IScrollingInfo))]
+        private readonly TestScrollingInfo scrollingInfo = new TestScrollingInfo();
 
         public ScrollingTestContainer(ScrollingDirection direction)
         {
-            this.direction = direction;
+            scrollingInfo.Direction.Value = direction;
         }
 
-        protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
-        {
-            var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
-            dependencies.CacheAs<IScrollingInfo>(new ScrollingInfo { Direction = { Value = direction }});
-            return dependencies;
-        }
+        public void Flip() => scrollingInfo.Direction.Value = scrollingInfo.Direction.Value == ScrollingDirection.Up ? ScrollingDirection.Down : ScrollingDirection.Up;
+    }
 
-        private class ScrollingInfo : IScrollingInfo
-        {
-            public readonly Bindable<ScrollingDirection> Direction = new Bindable<ScrollingDirection>();
-            IBindable<ScrollingDirection> IScrollingInfo.Direction => Direction;
-        }
+    public class TestScrollingInfo : IScrollingInfo
+    {
+        public readonly Bindable<ScrollingDirection> Direction = new Bindable<ScrollingDirection>();
+        IBindable<ScrollingDirection> IScrollingInfo.Direction => Direction;
     }
 }

osu.Game.Rulesets.Mania.Tests/TestCaseEditor.cs

@@ -0,0 +1,32 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Configuration;
+using osu.Game.Rulesets.Mania.Configuration;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    [TestFixture]
+    public class TestCaseEditor : EditorTestCase
+    {
+        private readonly Bindable<ManiaScrollingDirection> direction = new Bindable<ManiaScrollingDirection>();
+
+        public TestCaseEditor()
+            : base(new ManiaRuleset())
+        {
+            AddStep("upwards scroll", () => direction.Value = ManiaScrollingDirection.Up);
+            AddStep("downwards scroll", () => direction.Value = ManiaScrollingDirection.Down);
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(RulesetConfigCache configCache)
+        {
+            var config = (ManiaConfigManager)configCache.GetConfigFor(Ruleset.Value.CreateInstance());
+            config.BindWith(ManiaSetting.ScrollDirection, direction);
+        }
+    }
+}

osu.Game.Rulesets.Mania.Tests/TestCaseNotes.cs

@@ -46,15 +46,20 @@ namespace osu.Game.Rulesets.Mania.Tests
                 Spacing = new Vector2(20),
                 Children = new[]
                 {
-                    createNoteDisplay(ScrollingDirection.Down),
-                    createNoteDisplay(ScrollingDirection.Up),
-                    createHoldNoteDisplay(ScrollingDirection.Down),
-                    createHoldNoteDisplay(ScrollingDirection.Up),
+                    createNoteDisplay(ScrollingDirection.Down, 1, out var note1),
+                    createNoteDisplay(ScrollingDirection.Up, 2, out var note2),
+                    createHoldNoteDisplay(ScrollingDirection.Down, 1, out var holdNote1),
+                    createHoldNoteDisplay(ScrollingDirection.Up, 2, out var holdNote2),
                 }
             };
+
+            AddAssert("note 1 facing downwards", () => verifyAnchors(note1, Anchor.y2));
+            AddAssert("note 2 facing upwards", () => verifyAnchors(note2, Anchor.y0));
+            AddAssert("hold note 1 facing downwards", () => verifyAnchors(holdNote1, Anchor.y2));
+            AddAssert("hold note 2 facing upwards", () => verifyAnchors(holdNote2, Anchor.y0));
         }
 
-        private Drawable createNoteDisplay(ScrollingDirection direction)
+        private Drawable createNoteDisplay(ScrollingDirection direction, int identifier, out DrawableNote hitObject)
         {
             var note = new Note { StartTime = 999999999 };
             note.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
@@ -62,24 +67,24 @@ namespace osu.Game.Rulesets.Mania.Tests
             return new ScrollingTestContainer(direction)
             {
                 AutoSizeAxes = Axes.Both,
-                Child = new NoteContainer(direction, $"note, scrolling {direction.ToString().ToLowerInvariant()}")
+                Child = new NoteContainer(direction, $"note {identifier}, scrolling {direction.ToString().ToLowerInvariant()}")
                 {
-                    Child = new DrawableNote(note) { AccentColour = Color4.OrangeRed }
+                    Child = hitObject = new DrawableNote(note) { AccentColour = Color4.OrangeRed }
                 }
             };
         }
 
-        private Drawable createHoldNoteDisplay(ScrollingDirection direction)
+        private Drawable createHoldNoteDisplay(ScrollingDirection direction, int identifier, out DrawableHoldNote hitObject)
         {
-            var note = new HoldNote { StartTime = 999999999, Duration = 1000 };
+            var note = new HoldNote { StartTime = 999999999, Duration = 5000 };
             note.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
 
             return new ScrollingTestContainer(direction)
             {
                 AutoSizeAxes = Axes.Both,
-                Child = new NoteContainer(direction, $"hold note, scrolling {direction.ToString().ToLowerInvariant()}")
+                Child = new NoteContainer(direction, $"hold note {identifier}, scrolling {direction.ToString().ToLowerInvariant()}")
                 {
-                    Child = new DrawableHoldNote(note)
+                    Child = hitObject = new DrawableHoldNote(note)
                     {
                         RelativeSizeAxes = Axes.Both,
                         AccentColour = Color4.OrangeRed,
@@ -88,6 +93,12 @@ namespace osu.Game.Rulesets.Mania.Tests
             };
         }
 
+        private bool verifyAnchors(DrawableHitObject hitObject, Anchor expectedAnchor)
+            => hitObject.Anchor.HasFlag(expectedAnchor) && hitObject.Origin.HasFlag(expectedAnchor);
+
+        private bool verifyAnchors(DrawableHoldNote holdNote, Anchor expectedAnchor)
+            => verifyAnchors((DrawableHitObject)holdNote, expectedAnchor) && holdNote.NestedHitObjects.All(n => verifyAnchors(n, expectedAnchor));
+
         private class NoteContainer : Container
         {
             private readonly Container content;

osu.Game.Rulesets.Mania.Tests/TestCaseStage.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System.Collections.Generic;
+using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
@@ -24,6 +25,8 @@ namespace osu.Game.Rulesets.Mania.Tests
 
         private readonly List<ManiaStage> stages = new List<ManiaStage>();
 
+        private FillFlowContainer<ScrollingTestContainer> fill;
+
         public TestCaseStage()
             : base(columns)
         {
@@ -32,7 +35,7 @@ namespace osu.Game.Rulesets.Mania.Tests
         [BackgroundDependencyLoader]
         private void load()
         {
-            Child = new FillFlowContainer
+            Child = fill = new FillFlowContainer<ScrollingTestContainer>
             {
                 RelativeSizeAxes = Axes.Both,
                 Anchor = Anchor.Centre,
@@ -54,8 +57,22 @@ namespace osu.Game.Rulesets.Mania.Tests
             AddStep("hold note", createHoldNote);
             AddStep("minor bar line", () => createBarLine(false));
             AddStep("major bar line", () => createBarLine(true));
+
+            AddAssert("check note anchors", () => notesInStageAreAnchored(stages[0], Anchor.TopCentre));
+            AddAssert("check note anchors", () => notesInStageAreAnchored(stages[1], Anchor.BottomCentre));
+
+            AddStep("flip direction", () =>
+            {
+                foreach (var c in fill.Children)
+                    c.Flip();
+            });
+
+            AddAssert("check note anchors", () => notesInStageAreAnchored(stages[0], Anchor.BottomCentre));
+            AddAssert("check note anchors", () => notesInStageAreAnchored(stages[1], Anchor.TopCentre));
         }
 
+        private bool notesInStageAreAnchored(ManiaStage stage, Anchor anchor) => stage.Columns.SelectMany(c => c.AllHitObjects).All(o => o.Anchor == anchor);
+
         private void createNote()
         {
             foreach (var stage in stages)
@@ -101,7 +118,7 @@ namespace osu.Game.Rulesets.Mania.Tests
             }
         }
 
-        private Drawable createStage(ScrollingDirection direction, ManiaAction action)
+        private ScrollingTestContainer createStage(ScrollingDirection direction, ManiaAction action)
         {
             var specialAction = ManiaAction.Special1;
 

osu.Game.Rulesets.Mania.Tests/osu.Game.Rulesets.Mania.Tests.csproj

@@ -2,9 +2,10 @@
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.8.0" />
-    <PackageReference Include="NUnit" Version="3.10.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Include="NUnit" Version="3.11.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.10.0" />
+    <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>

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

@@ -48,7 +48,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
                 TargetColumns = (int)Math.Max(1, roundedCircleSize);
             else
             {
-                float percentSliderOrSpinner = (float)beatmap.HitObjects.Count(h => h is IHasEndTime) / beatmap.HitObjects.Count();
+                float percentSliderOrSpinner = (float)beatmap.HitObjects.Count(h => h is IHasEndTime) / beatmap.HitObjects.Count;
                 if (percentSliderOrSpinner < 0.2)
                     TargetColumns = 7;
                 else if (percentSliderOrSpinner < 0.3 || roundedCircleSize >= 5)

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/DistanceObjectPatternGenerator.cs

@@ -173,19 +173,18 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             var pattern = new Pattern();
 
             int usableColumns = TotalColumns - RandomStart - PreviousPattern.ColumnWithObjects;
-            int nextColumn = Random.Next(RandomStart, TotalColumns);
+            int nextColumn = GetRandomColumn();
             for (int i = 0; i < Math.Min(usableColumns, noteCount); i++)
             {
-                while (pattern.ColumnHasObject(nextColumn) || PreviousPattern.ColumnHasObject(nextColumn))  //find available column
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
+                // Find available column
+                nextColumn = FindAvailableColumn(nextColumn, pattern, PreviousPattern);
                 addToPattern(pattern, nextColumn, startTime, EndTime);
             }
 
             // This is can't be combined with the above loop due to RNG
             for (int i = 0; i < noteCount - usableColumns; i++)
             {
-                while (pattern.ColumnHasObject(nextColumn))
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
+                nextColumn = FindAvailableColumn(nextColumn, pattern);
                 addToPattern(pattern, nextColumn, startTime, EndTime);
             }
 
@@ -210,18 +209,13 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
-            {
-                while (PreviousPattern.ColumnHasObject(nextColumn))
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-            }
+                nextColumn = FindAvailableColumn(nextColumn, PreviousPattern);
 
             int lastColumn = nextColumn;
             for (int i = 0; i < noteCount; i++)
             {
                 addToPattern(pattern, nextColumn, startTime, startTime);
-                while (nextColumn == lastColumn)
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-
+                nextColumn = FindAvailableColumn(nextColumn, validation: c => c != lastColumn);
                 lastColumn = nextColumn;
                 startTime += SegmentDuration;
             }
@@ -313,7 +307,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 if (TotalColumns > 2)
                     addToPattern(pattern, nextColumn, startTime, startTime);
 
-                nextColumn = Random.Next(RandomStart, TotalColumns);
+                nextColumn = GetRandomColumn();
                 startTime += SegmentDuration;
             }
 
@@ -392,16 +386,11 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
-            {
-                while (PreviousPattern.ColumnHasObject(nextColumn))
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-            }
+                nextColumn = FindAvailableColumn(nextColumn, PreviousPattern);
 
             for (int i = 0; i < columnRepeat; i++)
             {
-                while (pattern.ColumnHasObject(nextColumn))
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-
+                nextColumn = FindAvailableColumn(nextColumn, pattern);
                 addToPattern(pattern, nextColumn, startTime, EndTime);
                 startTime += SegmentDuration;
             }
@@ -426,15 +415,12 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             int holdColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
-            {
-                while (PreviousPattern.ColumnHasObject(holdColumn))
-                    holdColumn = Random.Next(RandomStart, TotalColumns);
-            }
+                holdColumn = FindAvailableColumn(holdColumn, PreviousPattern);
 
             // Create the hold note
             addToPattern(pattern, holdColumn, startTime, EndTime);
 
-            int nextColumn = Random.Next(RandomStart, TotalColumns);
+            int nextColumn = GetRandomColumn();
             int noteCount;
             if (ConversionDifficulty > 6.5)
                 noteCount = GetRandomNoteCount(0.63, 0);
@@ -455,8 +441,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 {
                     for (int j = 0; j < noteCount; j++)
                     {
-                        while (rowPattern.ColumnHasObject(nextColumn) || nextColumn == holdColumn)
-                            nextColumn = Random.Next(RandomStart, TotalColumns);
+                        nextColumn = FindAvailableColumn(nextColumn, validation: c => c != holdColumn, patterns: rowPattern);
                         addToPattern(rowPattern, nextColumn, startTime, startTime);
                     }
                 }

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/EndTimeObjectPatternGenerator.cs

@@ -39,32 +39,17 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                     addToPattern(pattern, 0, generateHold);
                     break;
                 case 8:
-                    addToPattern(pattern, getNextRandomColumn(RandomStart), generateHold);
+                    addToPattern(pattern, FindAvailableColumn(GetRandomColumn(), PreviousPattern), generateHold);
                     break;
                 default:
                     if (TotalColumns > 0)
-                        addToPattern(pattern, getNextRandomColumn(0), generateHold);
+                        addToPattern(pattern, GetRandomColumn(), generateHold);
                     break;
             }
 
             return pattern;
         }
 
-        /// <summary>
-        /// Picks a random column after a column.
-        /// </summary>
-        /// <param name="start">The starting column.</param>
-        /// <returns>A random column after <paramref name="start"/>.</returns>
-        private int getNextRandomColumn(int start)
-        {
-            int nextColumn = Random.Next(start, TotalColumns);
-
-            while (PreviousPattern.ColumnHasObject(nextColumn))
-                nextColumn = Random.Next(start, TotalColumns);
-
-            return nextColumn;
-        }
-
         /// <summary>
         /// Constructs and adds a note to a pattern.
         /// </summary>

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs

@@ -25,9 +25,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                                          PatternType lastStair, IBeatmap originalBeatmap)
             : base(random, hitObject, beatmap, previousPattern, originalBeatmap)
         {
-            if (previousTime > hitObject.StartTime) throw new ArgumentOutOfRangeException(nameof(previousTime));
-            if (density < 0) throw new ArgumentOutOfRangeException(nameof(density));
-
             StairType = lastStair;
 
             TimingControlPoint timingPoint = beatmap.ControlPointInfo.TimingPointAt(hitObject.StartTime);
@@ -234,22 +231,27 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             for (int i = 0; i < noteCount; i++)
             {
-                while (pattern.ColumnHasObject(nextColumn) || PreviousPattern.ColumnHasObject(nextColumn) && !allowStacking)
-                {
-                    if (convertType.HasFlag(PatternType.Gathered))
-                    {
-                        nextColumn++;
-                        if (nextColumn == TotalColumns)
-                            nextColumn = RandomStart;
-                    }
-                    else
-                        nextColumn = Random.Next(RandomStart, TotalColumns);
-                }
+                nextColumn = allowStacking
+                    ? FindAvailableColumn(nextColumn, nextColumn: getNextColumn, patterns: pattern)
+                    : FindAvailableColumn(nextColumn, nextColumn: getNextColumn, patterns: new[] { pattern, PreviousPattern });
 
                 addToPattern(pattern, nextColumn);
             }
 
             return pattern;
+
+            int getNextColumn(int last)
+            {
+                if (convertType.HasFlag(PatternType.Gathered))
+                {
+                    last++;
+                    if (last == TotalColumns)
+                        last = RandomStart;
+                }
+                else
+                    last = GetRandomColumn();
+                return last;
+            }
         }
 
         /// <summary>
@@ -286,17 +288,19 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
         private Pattern generateRandomPatternWithMirrored(double centreProbability, double p2, double p3)
         {
+            if (convertType.HasFlag(PatternType.ForceNotStack))
+                return generateRandomPattern(1 / 2f + p2 / 2, p2, (p2 + p3) / 2, p3);
+
             var pattern = new Pattern();
 
             bool addToCentre;
             int noteCount = getRandomNoteCountMirrored(centreProbability, p2, p3, out addToCentre);
 
             int columnLimit = (TotalColumns % 2 == 0 ? TotalColumns : TotalColumns - 1) / 2;
-            int nextColumn = Random.Next(RandomStart, columnLimit);
+            int nextColumn = GetRandomColumn(upperBound: columnLimit);
             for (int i = 0; i < noteCount; i++)
             {
-                while (pattern.ColumnHasObject(nextColumn))
-                    nextColumn = Random.Next(RandomStart, columnLimit);
+                nextColumn = FindAvailableColumn(nextColumn, upperBound: columnLimit, patterns: pattern);
 
                 // Add normal note
                 addToPattern(pattern, nextColumn);
@@ -368,9 +372,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         {
             addToCentre = false;
 
-            if (convertType.HasFlag(PatternType.ForceNotStack))
-                return getRandomNoteCount(1 / 2f + p2 / 2, p2, (p2 + p3) / 2, p3);
-
             switch (TotalColumns)
             {
                 case 2:

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/PatternGenerator.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Linq;
+using JetBrains.Annotations;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mania.MathUtils;
 using osu.Game.Rulesets.Objects;
@@ -90,6 +91,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         }
 
         private double? conversionDifficulty;
+
         /// <summary>
         /// A difficulty factor used for various conversion methods from osu!stable.
         /// </summary>
@@ -110,11 +112,88 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                     drainTime = 10000;
 
                 BeatmapDifficulty difficulty = OriginalBeatmap.BeatmapInfo.BaseDifficulty;
-                conversionDifficulty = ((difficulty.DrainRate + MathHelper.Clamp(difficulty.ApproachRate, 4, 7)) / 1.5 + (double)OriginalBeatmap.HitObjects.Count() / drainTime * 9f) / 38f * 5f / 1.15;
+                conversionDifficulty = ((difficulty.DrainRate + MathHelper.Clamp(difficulty.ApproachRate, 4, 7)) / 1.5 + (double)OriginalBeatmap.HitObjects.Count / drainTime * 9f) / 38f * 5f / 1.15;
                 conversionDifficulty = Math.Min(conversionDifficulty.Value, 12);
 
                 return conversionDifficulty.Value;
             }
         }
+
+        /// <summary>
+        /// Finds a new column in which a <see cref="HitObject"/> can be placed.
+        /// This uses <see cref="GetRandomColumn"/> to pick the next candidate column.
+        /// </summary>
+        /// <param name="initialColumn">The initial column to test. This may be returned if it is already a valid column.</param>
+        /// <param name="patterns">A list of patterns for which the validity of a column should be checked against.
+        /// A column is not a valid candidate if a <see cref="HitObject"/> occupies the same column in any of the patterns.</param>
+        /// <returns>A column for which there are no <see cref="HitObject"/>s in any of <paramref name="patterns"/> occupying the same column.</returns>
+        /// <exception cref="NotEnoughColumnsException">If there are no valid candidate columns.</exception>
+        protected int FindAvailableColumn(int initialColumn, params Pattern[] patterns)
+            => FindAvailableColumn(initialColumn, null, patterns: patterns);
+
+        /// <summary>
+        /// Finds a new column in which a <see cref="HitObject"/> can be placed.
+        /// </summary>
+        /// <param name="initialColumn">The initial column to test. This may be returned if it is already a valid column.</param>
+        /// <param name="nextColumn">A function to retrieve the next column. If null, a randomisation scheme will be used.</param>
+        /// <param name="validation">A function to perform additional validation checks to determine if a column is a valid candidate for a <see cref="HitObject"/>.</param>
+        /// <param name="lowerBound">The minimum column index. If null, <see cref="RandomStart"/> is used.</param>
+        /// <param name="upperBound">The maximum column index. If null, <see cref="PatternGenerator.TotalColumns"/> is used.</param>
+        /// <param name="patterns">A list of patterns for which the validity of a column should be checked against.
+        /// A column is not a valid candidate if a <see cref="HitObject"/> occupies the same column in any of the patterns.</param>
+        /// <returns>A column which has passed the <paramref name="validation"/> check and for which there are no
+        /// <see cref="HitObject"/>s in any of <paramref name="patterns"/> occupying the same column.</returns>
+        /// <exception cref="NotEnoughColumnsException">If there are no valid candidate columns.</exception>
+        protected int FindAvailableColumn(int initialColumn, int? lowerBound = null, int? upperBound = null, Func<int, int> nextColumn = null, [InstantHandle] Func<int, bool> validation = null,
+                                          params Pattern[] patterns)
+        {
+            lowerBound = lowerBound ?? RandomStart;
+            upperBound = upperBound ?? TotalColumns;
+            nextColumn = nextColumn ?? (_ => GetRandomColumn(lowerBound, upperBound));
+
+            // Check for the initial column
+            if (isValid(initialColumn))
+                return initialColumn;
+
+            // Ensure that we have at least one free column, so that an endless loop is avoided
+            bool hasValidColumns = false;
+            for (int i = lowerBound.Value; i < upperBound.Value; i++)
+            {
+                hasValidColumns = isValid(i);
+                if (hasValidColumns)
+                    break;
+            }
+
+            if (!hasValidColumns)
+                throw new NotEnoughColumnsException();
+
+            // Iterate until a valid column is found. This is a random iteration in the default case.
+            do
+            {
+                initialColumn = nextColumn(initialColumn);
+            } while (!isValid(initialColumn));
+
+            return initialColumn;
+
+            bool isValid(int column) => validation?.Invoke(column) != false && !patterns.Any(p => p.ColumnHasObject(column));
+        }
+
+        /// <summary>
+        /// Returns a random column index in the range [<paramref name="lowerBound"/>, <paramref name="upperBound"/>).
+        /// </summary>
+        /// <param name="lowerBound">The minimum column index. If null, <see cref="RandomStart"/> is used.</param>
+        /// <param name="upperBound">The maximum column index. If null, <see cref="PatternGenerator.TotalColumns"/> is used.</param>
+        protected int GetRandomColumn(int? lowerBound = null, int? upperBound = null) => Random.Next(lowerBound ?? RandomStart, upperBound ?? TotalColumns);
+
+        /// <summary>
+        /// Occurs when mania conversion is stuck in an infinite loop unable to find columns to place new hitobjects in.
+        /// </summary>
+        public class NotEnoughColumnsException : Exception
+        {
+            public NotEnoughColumnsException()
+                : base("There were not enough columns to complete conversion.")
+            {
+            }
+        }
     }
 }

osu.Game.Rulesets.Mania/Configuration/ManiaConfigManager.cs

@@ -19,7 +19,7 @@ namespace osu.Game.Rulesets.Mania.Configuration
         {
             base.InitialiseDefaults();
 
-            Set(ManiaSetting.ScrollTime, 1500.0, 50.0, 10000.0, 50.0);
+            Set(ManiaSetting.ScrollTime, 2250.0, 50.0, 10000.0, 50.0);
             Set(ManiaSetting.ScrollDirection, ManiaScrollingDirection.Down);
         }
 

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

@@ -0,0 +1,17 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Rulesets.Mania.Beatmaps;
+using osu.Game.Rulesets.Mania.UI;
+using System.Collections.Generic;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public class ManiaEditPlayfield : ManiaPlayfield
+    {
+        public ManiaEditPlayfield(List<StageDefinition> stages)
+            : base(stages)
+        {
+        }
+    }
+}

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

@@ -0,0 +1,26 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Graphics;
+using OpenTK;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.UI;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public class ManiaEditRulesetContainer : ManiaRulesetContainer
+    {
+        public ManiaEditRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap)
+            : base(ruleset, beatmap)
+        {
+        }
+
+        protected override Playfield CreatePlayfield() => new ManiaEditPlayfield(Beatmap.Stages)
+        {
+            Anchor = Anchor.Centre,
+            Origin = Anchor.Centre,
+            Size = Vector2.One
+        };
+    }
+}

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

@@ -0,0 +1,54 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Tools;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Objects.Drawables;
+using System.Collections.Generic;
+using osu.Framework.Allocation;
+using osu.Game.Rulesets.Mania.Configuration;
+using osu.Game.Rulesets.Mania.Edit.Masks;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.UI;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public class ManiaHitObjectComposer : HitObjectComposer<ManiaHitObject>
+    {
+        protected new ManiaConfigManager Config => (ManiaConfigManager)base.Config;
+
+        public ManiaHitObjectComposer(Ruleset ruleset)
+            : base(ruleset)
+        {
+        }
+
+        protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
+        {
+            var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
+            dependencies.CacheAs<IScrollingInfo>(new ManiaScrollingInfo(Config));
+            return dependencies;
+        }
+
+        protected override RulesetContainer<ManiaHitObject> CreateRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap)
+            => new ManiaEditRulesetContainer(ruleset, beatmap);
+
+        protected override IReadOnlyList<HitObjectCompositionTool> CompositionTools => Array.Empty<HitObjectCompositionTool>();
+
+        public override SelectionMask CreateMaskFor(DrawableHitObject hitObject)
+        {
+            switch (hitObject)
+            {
+                case DrawableNote note:
+                    return new NoteSelectionMask(note);
+                case DrawableHoldNote holdNote:
+                    return new HoldNoteSelectionMask(holdNote);
+            }
+
+            return base.CreateMaskFor(hitObject);
+        }
+    }
+}

osu.Game.Rulesets.Mania/Edit/Masks/HoldNoteSelectionMask.cs

@@ -0,0 +1,84 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Allocation;
+using osu.Framework.Configuration;
+using osu.Framework.Graphics;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Mania.Objects.Drawables.Pieces;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.UI.Scrolling;
+using OpenTK;
+using OpenTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Edit.Masks
+{
+    public class HoldNoteSelectionMask : SelectionMask
+    {
+        public new DrawableHoldNote HitObject => (DrawableHoldNote)base.HitObject;
+
+        private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
+
+        private readonly BodyPiece body;
+
+        public HoldNoteSelectionMask(DrawableHoldNote hold)
+            : base(hold)
+        {
+            InternalChildren = new Drawable[]
+            {
+                new HoldNoteNoteSelectionMask(hold.Head),
+                new HoldNoteNoteSelectionMask(hold.Tail),
+                body = new BodyPiece
+                {
+                    AccentColour = Color4.Transparent
+                },
+            };
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours, IScrollingInfo scrollingInfo)
+        {
+            body.BorderColour = colours.Yellow;
+
+            direction.BindTo(scrollingInfo.Direction);
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            Size = HitObject.DrawSize + new Vector2(0, HitObject.Tail.DrawHeight);
+            Position = Parent.ToLocalSpace(HitObject.ScreenSpaceDrawQuad.TopLeft);
+
+            // This is a side-effect of not matching the hitobject's anchors/origins, which is kinda hard to do
+            // When scrolling upwards our origin is already at the top of the head note (which is the intended location),
+            // but when scrolling downwards our origin is at the _bottom_ of the tail note (where we need to be at the _top_ of the tail note)
+            if (direction.Value == ScrollingDirection.Down)
+                Y -= HitObject.Tail.DrawHeight;
+        }
+
+        private class HoldNoteNoteSelectionMask : NoteSelectionMask
+        {
+            public HoldNoteNoteSelectionMask(DrawableNote note)
+                : base(note)
+            {
+                Select();
+            }
+
+            protected override void Update()
+            {
+                base.Update();
+
+                Anchor = HitObject.Anchor;
+                Origin = HitObject.Origin;
+
+                Position = HitObject.DrawPosition;
+            }
+
+            // Todo: This is temporary, since the note masks don't do anything special yet. In the future they will handle input.
+            public override bool HandlePositionalInput => false;
+        }
+    }
+}

osu.Game.Rulesets.Mania/Edit/Masks/NoteSelectionMask.cs

@@ -0,0 +1,39 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Allocation;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Mania.Objects.Drawables.Pieces;
+
+namespace osu.Game.Rulesets.Mania.Edit.Masks
+{
+    public class NoteSelectionMask : SelectionMask
+    {
+        public NoteSelectionMask(DrawableNote note)
+            : base(note)
+        {
+            Scale = note.Scale;
+
+            CornerRadius = 5;
+            Masking = true;
+
+            AddInternal(new NotePiece());
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            Colour = colours.Yellow;
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            Size = HitObject.DrawSize;
+            Position = Parent.ToLocalSpace(HitObject.ScreenSpaceDrawQuad.TopLeft);
+        }
+    }
+}

osu.Game.Rulesets.Mania/Judgements/HoldNoteTailJudgement.cs

@@ -1,27 +0,0 @@
-// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
-// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
-
-using osu.Game.Rulesets.Scoring;
-
-namespace osu.Game.Rulesets.Mania.Judgements
-{
-    public class HoldNoteTailJudgement : ManiaJudgement
-    {
-        /// <summary>
-        /// Whether the hold note has been released too early and shouldn't give full score for the release.
-        /// </summary>
-        public bool HasBroken;
-
-        protected override int NumericResultFor(HitResult result)
-        {
-            switch (result)
-            {
-                default:
-                    return base.NumericResultFor(result);
-                case HitResult.Great:
-                case HitResult.Perfect:
-                    return base.NumericResultFor(HasBroken ? HitResult.Good : result);
-            }
-        }
-    }
-}

osu.Game.Rulesets.Mania/ManiaRuleset.cs

@@ -19,9 +19,11 @@ using osu.Game.Configuration;
 using osu.Game.Overlays.Settings;
 using osu.Game.Rulesets.Configuration;
 using osu.Game.Rulesets.Difficulty;
+using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Configuration;
 using osu.Game.Rulesets.Mania.Difficulty;
+using osu.Game.Rulesets.Mania.Edit;
 using osu.Game.Rulesets.Scoring;
 
 namespace osu.Game.Rulesets.Mania
@@ -32,6 +34,8 @@ namespace osu.Game.Rulesets.Mania
         public override IBeatmapConverter CreateBeatmapConverter(IBeatmap beatmap) => new ManiaBeatmapConverter(beatmap);
         public override PerformanceCalculator CreatePerformanceCalculator(WorkingBeatmap beatmap, Score score) => new ManiaPerformanceCalculator(this, beatmap, score);
 
+        public override HitObjectComposer CreateHitObjectComposer() => new ManiaHitObjectComposer(this);
+
         public override IEnumerable<Mod> ConvertLegacyMods(LegacyMods mods)
         {
             if (mods.HasFlag(LegacyMods.Nightcore))

osu.Game.Rulesets.Mania/Mods/ManiaModDualStages.cs

@@ -5,13 +5,11 @@ using System.Collections.Generic;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Objects;
-using osu.Game.Rulesets.Mania.UI;
 using osu.Game.Rulesets.Mods;
-using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Rulesets.Mania.Mods
 {
-    public class ManiaModDualStages : Mod, IPlayfieldTypeMod, IApplicableToBeatmapConverter, IApplicableToRulesetContainer<ManiaHitObject>
+    public class ManiaModDualStages : Mod, IPlayfieldTypeMod, IApplicableToBeatmapConverter, IApplicableToBeatmap<ManiaHitObject>
     {
         public override string Name => "Dual Stages";
         public override string ShortenedName => "DS";
@@ -34,22 +32,21 @@ namespace osu.Game.Rulesets.Mania.Mods
             mbc.TargetColumns *= 2;
         }
 
-        public void ApplyToRulesetContainer(RulesetContainer<ManiaHitObject> rulesetContainer)
+        public void ApplyToBeatmap(Beatmap<ManiaHitObject> beatmap)
         {
-            var mrc = (ManiaRulesetContainer)rulesetContainer;
-
-            // Although this can work, for now let's not allow keymods for mania-specific beatmaps
             if (isForCurrentRuleset)
                 return;
 
+            var maniaBeatmap = (ManiaBeatmap)beatmap;
+
             var newDefinitions = new List<StageDefinition>();
-            foreach (var existing in mrc.Beatmap.Stages)
+            foreach (var existing in maniaBeatmap.Stages)
             {
                 newDefinitions.Add(new StageDefinition { Columns = existing.Columns / 2 });
                 newDefinitions.Add(new StageDefinition { Columns = existing.Columns / 2 });
             }
 
-            mrc.Beatmap.Stages = newDefinitions;
+            maniaBeatmap.Stages = newDefinitions;
         }
 
         public PlayfieldType PlayfieldType => PlayfieldType.Dual;

osu.Game.Rulesets.Mania/Objects/Drawables/DrawableHoldNote.cs

@@ -7,7 +7,6 @@ using osu.Framework.Graphics;
 using osu.Game.Rulesets.Mania.Objects.Drawables.Pieces;
 using OpenTK.Graphics;
 using osu.Framework.Graphics.Containers;
-using osu.Game.Rulesets.Mania.Judgements;
 using osu.Framework.Input.Bindings;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI.Scrolling;
@@ -19,10 +18,10 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
     /// </summary>
     public class DrawableHoldNote : DrawableManiaHitObject<HoldNote>, IKeyBindingHandler<ManiaAction>
     {
-        public override bool DisplayJudgement => false;
+        public override bool DisplayResult => false;
 
-        private readonly DrawableNote head;
-        private readonly DrawableNote tail;
+        public readonly DrawableNote Head;
+        public readonly DrawableNote Tail;
 
         private readonly BodyPiece bodyPiece;
 
@@ -57,12 +56,12 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
                         HoldStartTime = () => holdStartTime
                     })
                 },
-                head = new DrawableHeadNote(this)
+                Head = new DrawableHeadNote(this)
                 {
                     Anchor = Anchor.TopCentre,
                     Origin = Anchor.TopCentre
                 },
-                tail = new DrawableTailNote(this)
+                Tail = new DrawableTailNote(this)
                 {
                     Anchor = Anchor.TopCentre,
                     Origin = Anchor.TopCentre
@@ -72,8 +71,8 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             foreach (var tick in tickContainer)
                 AddNested(tick);
 
-            AddNested(head);
-            AddNested(tail);
+            AddNested(Head);
+            AddNested(Tail);
         }
 
         protected override void OnDirectionChanged(ScrollingDirection direction)
@@ -91,16 +90,16 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
                 base.AccentColour = value;
 
                 bodyPiece.AccentColour = value;
-                head.AccentColour = value;
-                tail.AccentColour = value;
+                Head.AccentColour = value;
+                Tail.AccentColour = value;
                 tickContainer.ForEach(t => t.AccentColour = value);
             }
         }
 
-        protected override void CheckForJudgements(bool userTriggered, double timeOffset)
+        protected override void CheckForResult(bool userTriggered, double timeOffset)
         {
-            if (tail.AllJudged)
-                AddJudgement(new HoldNoteJudgement { Result = HitResult.Perfect });
+            if (Tail.AllJudged)
+                ApplyResult(r => r.Type = HitResult.Perfect);
         }
 
         protected override void Update()
@@ -108,8 +107,20 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             base.Update();
 
             // Make the body piece not lie under the head note
-            bodyPiece.Y = (Direction.Value == ScrollingDirection.Up ? 1 : -1) * head.Height / 2;
-            bodyPiece.Height = DrawHeight - head.Height / 2 + tail.Height / 2;
+            bodyPiece.Y = (Direction.Value == ScrollingDirection.Up ? 1 : -1) * Head.Height / 2;
+            bodyPiece.Height = DrawHeight - Head.Height / 2 + Tail.Height / 2;
+        }
+
+        protected void BeginHold()
+        {
+            holdStartTime = Time.Current;
+            bodyPiece.Hitting = true;
+        }
+
+        protected void EndHold()
+        {
+            holdStartTime = null;
+            bodyPiece.Hitting = false;
         }
 
         public bool OnPressed(ManiaAction action)
@@ -124,8 +135,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             // The user has pressed during the body of the hold note, after the head note and its hit windows have passed
             // and within the limited range of the above if-statement. This state will be managed by the head note if the
             // user has pressed during the hit windows of the head note.
-            holdStartTime = Time.Current;
-
+            BeginHold();
             return true;
         }
 
@@ -138,10 +148,10 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             if (action != Action.Value)
                 return false;
 
-            holdStartTime = null;
+            EndHold();
 
             // If the key has been released too early, the user should not receive full score for the release
-            if (!tail.IsHit)
+            if (!Tail.IsHit)
                 hasBroken = true;
 
             return true;
@@ -166,12 +176,12 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
                     return false;
 
                 // If the key has been released too early, the user should not receive full score for the release
-                if (Judgements.Any(j => j.Result == HitResult.Miss))
+                if (Result.Type == HitResult.Miss)
                     holdNote.hasBroken = true;
 
                 // The head note also handles early hits before the body, but we want accurate early hits to count as the body being held
                 // The body doesn't handle these early early hits, so we have to explicitly set the holding state here
-                holdNote.holdStartTime = Time.Current;
+                holdNote.BeginHold();
 
                 return true;
             }
@@ -197,7 +207,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
                 this.holdNote = holdNote;
             }
 
-            protected override void CheckForJudgements(bool userTriggered, double timeOffset)
+            protected override void CheckForResult(bool userTriggered, double timeOffset)
             {
                 // Factor in the release lenience
                 timeOffset /= release_window_lenience;
@@ -205,13 +215,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
                 if (!userTriggered)
                 {
                     if (!HitObject.HitWindows.CanBeHit(timeOffset))
-                    {
-                        AddJudgement(new HoldNoteTailJudgement
-                        {
-                            Result = HitResult.Miss,
-                            HasBroken = holdNote.hasBroken
-                        });
-                    }
+                        ApplyResult(r => r.Type = HitResult.Miss);
 
                     return;
                 }
@@ -220,10 +224,12 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
                 if (result == HitResult.None)
                     return;
 
-                AddJudgement(new HoldNoteTailJudgement
+                ApplyResult(r =>
                 {
-                    Result = result,
-                    HasBroken = holdNote.hasBroken
+                    if (holdNote.hasBroken && (result == HitResult.Perfect || result == HitResult.Perfect))
+                        result = HitResult.Good;
+
+                    r.Type = result;
                 });
             }
 
@@ -238,7 +244,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
                 if (action != Action.Value)
                     return false;
 
-                UpdateJudgement(true);
+                UpdateResult(true);
 
                 // Handled by the hold note, which will set holding = false
                 return false;

osu.Game.Rulesets.Mania/Objects/Drawables/DrawableHoldNoteTick.cs

@@ -7,7 +7,6 @@ using OpenTK.Graphics;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
-using osu.Game.Rulesets.Mania.Judgements;
 using osu.Framework.Graphics.Shapes;
 using osu.Game.Rulesets.Scoring;
 
@@ -72,29 +71,17 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             }
         }
 
-        protected override void CheckForJudgements(bool userTriggered, double timeOffset)
+        protected override void CheckForResult(bool userTriggered, double timeOffset)
         {
-            if (!userTriggered)
-                return;
-
             if (Time.Current < HitObject.StartTime)
                 return;
 
-            if (HoldStartTime?.Invoke() > HitObject.StartTime)
-                return;
+            var startTime = HoldStartTime?.Invoke();
 
-            AddJudgement(new HoldNoteTickJudgement { Result = HitResult.Perfect });
-        }
-
-        protected override void Update()
-        {
-            if (AllJudged)
-                return;
-
-            if (HoldStartTime?.Invoke() == null)
-                return;
-
-            UpdateJudgement(true);
+            if (startTime == null || startTime > HitObject.StartTime)
+                ApplyResult(r => r.Type = HitResult.Miss);
+            else
+                ApplyResult(r => r.Type = HitResult.Perfect);
         }
     }
 }

osu.Game.Rulesets.Mania/Objects/Drawables/DrawableNote.cs

@@ -6,7 +6,6 @@ using OpenTK.Graphics;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Input.Bindings;
-using osu.Game.Rulesets.Mania.Judgements;
 using osu.Game.Rulesets.Mania.Objects.Drawables.Pieces;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI.Scrolling;
@@ -56,12 +55,12 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             }
         }
 
-        protected override void CheckForJudgements(bool userTriggered, double timeOffset)
+        protected override void CheckForResult(bool userTriggered, double timeOffset)
         {
             if (!userTriggered)
             {
                 if (!HitObject.HitWindows.CanBeHit(timeOffset))
-                    AddJudgement(new ManiaJudgement { Result = HitResult.Miss });
+                    ApplyResult(r => r.Type = HitResult.Miss);
                 return;
             }
 
@@ -69,7 +68,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             if (result == HitResult.None)
                 return;
 
-            AddJudgement(new ManiaJudgement { Result = result });
+            ApplyResult(r => r.Type = result);
         }
 
         public virtual bool OnPressed(ManiaAction action)
@@ -77,7 +76,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             if (action != Action.Value)
                 return false;
 
-            return UpdateJudgement(true);
+            return UpdateResult(true);
         }
 
         public virtual bool OnReleased(ManiaAction action) => false;

osu.Game.Rulesets.Mania/Objects/Drawables/Pieces/BodyPiece.cs

@@ -32,6 +32,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables.Pieces
                 background = new Box { RelativeSizeAxes = Axes.Both },
                 foreground = new BufferedContainer
                 {
+                    Blending = BlendingMode.Additive,
                     RelativeSizeAxes = Axes.Both,
                     CacheDrawnFrameBuffer = true,
                     Children = new Drawable[]
@@ -73,6 +74,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables.Pieces
         }
 
         private Color4 accentColour;
+
         public Color4 AccentColour
         {
             get { return accentColour; }
@@ -86,6 +88,16 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables.Pieces
             }
         }
 
+        public bool Hitting
+        {
+            get { return hitting; }
+            set
+            {
+                hitting = value;
+                updateAccentColour();
+            }
+        }
+
         private Cached subtractionCache = new Cached();
 
         public override bool Invalidate(Invalidation invalidation = Invalidation.All, Drawable source = null, bool shallPropagate = true)
@@ -118,13 +130,26 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables.Pieces
             }
         }
 
+        private bool hitting;
+
         private void updateAccentColour()
         {
             if (!IsLoaded)
                 return;
 
-            foreground.Colour = AccentColour.Opacity(0.9f);
-            background.Colour = AccentColour.Opacity(0.6f);
+            foreground.Colour = AccentColour.Opacity(0.5f);
+            background.Colour = AccentColour.Opacity(0.7f);
+
+            const float animation_length = 50;
+
+            foreground.ClearTransforms(false, nameof(foreground.Colour));
+            if (hitting)
+            {
+                // wait for the next sync point
+                double synchronisedOffset = animation_length * 2 - Time.Current % (animation_length * 2);
+                using (foreground.BeginDelayedSequence(synchronisedOffset))
+                    foreground.FadeColour(AccentColour.Lighten(0.2f), animation_length).Then().FadeColour(foreground.Colour, animation_length).Loop();
+            }
 
             subtractionCache.Invalidate();
         }

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

@@ -3,6 +3,8 @@
 
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Mania.Judgements;
 using osu.Game.Rulesets.Objects.Types;
 
 namespace osu.Game.Rulesets.Mania.Objects
@@ -55,7 +57,7 @@ namespace osu.Game.Rulesets.Mania.Objects
         /// <summary>
         /// The tail note of the hold.
         /// </summary>
-        public readonly Note Tail = new Note();
+        public readonly TailNote Tail = new TailNote();
 
         /// <summary>
         /// The time between ticks of this hold.
@@ -68,9 +70,6 @@ namespace osu.Game.Rulesets.Mania.Objects
 
             TimingControlPoint timingPoint = controlPointInfo.TimingPointAt(StartTime);
             tickSpacing = timingPoint.BeatLength / difficulty.SliderTickRate;
-
-            Head.ApplyDefaults(controlPointInfo, difficulty);
-            Tail.ApplyDefaults(controlPointInfo, difficulty);
         }
 
         protected override void CreateNestedHitObjects()
@@ -78,6 +77,9 @@ namespace osu.Game.Rulesets.Mania.Objects
             base.CreateNestedHitObjects();
 
             createTicks();
+
+            AddNested(Head);
+            AddNested(Tail);
         }
 
         private void createTicks()
@@ -94,5 +96,7 @@ namespace osu.Game.Rulesets.Mania.Objects
                 });
             }
         }
+
+        public override Judgement CreateJudgement() => new HoldNoteJudgement();
     }
 }

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

@@ -1,6 +1,9 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Mania.Judgements;
+
 namespace osu.Game.Rulesets.Mania.Objects
 {
     /// <summary>
@@ -8,5 +11,6 @@ namespace osu.Game.Rulesets.Mania.Objects
     /// </summary>
     public class HoldNoteTick : ManiaHitObject
     {
+        public override Judgement CreateJudgement() => new HoldNoteTickJudgement();
     }
 }

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

@@ -1,6 +1,9 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Mania.Judgements;
+
 namespace osu.Game.Rulesets.Mania.Objects
 {
     /// <summary>
@@ -8,5 +11,6 @@ namespace osu.Game.Rulesets.Mania.Objects
     /// </summary>
     public class Note : ManiaHitObject
     {
+        public override Judgement CreateJudgement() => new ManiaJudgement();
     }
 }

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

@@ -0,0 +1,13 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Mania.Judgements;
+
+namespace osu.Game.Rulesets.Mania.Objects
+{
+    public class TailNote : Note
+    {
+        public override Judgement CreateJudgement() => new ManiaJudgement();
+    }
+}

osu.Game.Rulesets.Mania/Scoring/ManiaScoreProcessor.cs

@@ -1,7 +1,6 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using System.Linq;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Mania.Judgements;
@@ -97,31 +96,20 @@ namespace osu.Game.Rulesets.Mania.Scoring
         {
         }
 
-        protected override void SimulateAutoplay(Beatmap<ManiaHitObject> beatmap)
+        protected override void ApplyBeatmap(Beatmap<ManiaHitObject> beatmap)
         {
+            base.ApplyBeatmap(beatmap);
+
             BeatmapDifficulty difficulty = beatmap.BeatmapInfo.BaseDifficulty;
             hpMultiplier = BeatmapDifficulty.DifficultyRange(difficulty.DrainRate, hp_multiplier_min, hp_multiplier_mid, hp_multiplier_max);
             hpMissMultiplier = BeatmapDifficulty.DifficultyRange(difficulty.DrainRate, hp_multiplier_miss_min, hp_multiplier_miss_mid, hp_multiplier_miss_max);
+        }
 
+        protected override void SimulateAutoplay(Beatmap<ManiaHitObject> beatmap)
+        {
             while (true)
             {
-                foreach (var obj in beatmap.HitObjects)
-                {
-                    var holdNote = obj as HoldNote;
-
-                    if (holdNote != null)
-                    {
-                        // Head
-                        AddJudgement(new ManiaJudgement { Result = HitResult.Perfect });
-
-                        // Ticks
-                        int tickCount = holdNote.NestedHitObjects.OfType<HoldNoteTick>().Count();
-                        for (int i = 0; i < tickCount; i++)
-                            AddJudgement(new HoldNoteTickJudgement { Result = HitResult.Perfect });
-                    }
-
-                    AddJudgement(new ManiaJudgement { Result = HitResult.Perfect });
-                }
+                base.SimulateAutoplay(beatmap);
 
                 if (!HasFailed)
                     break;
@@ -133,20 +121,20 @@ namespace osu.Game.Rulesets.Mania.Scoring
             }
         }
 
-        protected override void OnNewJudgement(Judgement judgement)
+        protected override void ApplyResult(JudgementResult result)
         {
-            base.OnNewJudgement(judgement);
+            base.ApplyResult(result);
 
-            bool isTick = judgement is HoldNoteTickJudgement;
+            bool isTick = result.Judgement is HoldNoteTickJudgement;
 
             if (isTick)
             {
-                if (judgement.IsHit)
+                if (result.IsHit)
                     Health.Value += hpMultiplier * hp_increase_tick;
             }
             else
             {
-                switch (judgement.Result)
+                switch (result.Type)
                 {
                     case HitResult.Miss:
                         Health.Value += hpMissMultiplier * hp_increase_miss;

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

@@ -30,8 +30,6 @@ namespace osu.Game.Rulesets.Mania.UI
         internal readonly Container TopLevelContainer;
         private readonly Container explosionContainer;
 
-        protected override Container<Drawable> Content => hitObjectArea;
-
         public Column()
         {
             RelativeSizeAxes = Axes.Y;
@@ -54,7 +52,10 @@ namespace osu.Game.Rulesets.Mania.UI
                     RelativeSizeAxes = Axes.Both,
                     Children = new Drawable[]
                     {
-                        hitObjectArea = new ColumnHitObjectArea { RelativeSizeAxes = Axes.Both },
+                        hitObjectArea = new ColumnHitObjectArea(HitObjectContainer)
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                        },
                         explosionContainer = new Container
                         {
                             Name = "Hit explosions",
@@ -131,14 +132,14 @@ namespace osu.Game.Rulesets.Mania.UI
         public override void Add(DrawableHitObject hitObject)
         {
             hitObject.AccentColour = AccentColour;
-            hitObject.OnJudgement += OnJudgement;
+            hitObject.OnNewResult += OnNewResult;
 
             HitObjects.Add(hitObject);
         }
 
-        internal void OnJudgement(DrawableHitObject judgedObject, Judgement judgement)
+        internal void OnNewResult(DrawableHitObject judgedObject, JudgementResult result)
         {
-            if (!judgement.IsHit || !judgedObject.DisplayJudgement || !DisplayJudgements)
+            if (!result.IsHit || !judgedObject.DisplayResult || !DisplayJudgements)
                 return;
 
             explosionContainer.Add(new HitExplosion(judgedObject)

osu.Game.Rulesets.Mania/UI/Components/ColumnHitObjectArea.cs

@@ -8,28 +8,24 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 using osu.Game.Graphics;
+using osu.Game.Rulesets.UI;
 using osu.Game.Rulesets.UI.Scrolling;
 using OpenTK.Graphics;
 
 namespace osu.Game.Rulesets.Mania.UI.Components
 {
-    public class ColumnHitObjectArea : Container, IHasAccentColour
+    public class ColumnHitObjectArea : CompositeDrawable, IHasAccentColour
     {
         private const float hit_target_height = 10;
         private const float hit_target_bar_height = 2;
 
-        private Container<Drawable> content;
-        protected override Container<Drawable> Content => content;
-
         private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
 
-        private Container hitTargetLine;
+        private readonly Container hitTargetLine;
+        private readonly Drawable hitTargetBar;
 
-        [BackgroundDependencyLoader]
-        private void load(IScrollingInfo scrollingInfo)
+        public ColumnHitObjectArea(HitObjectContainer hitObjectContainer)
         {
-            Drawable hitTargetBar;
-
             InternalChildren = new[]
             {
                 hitTargetBar = new Box
@@ -45,13 +41,13 @@ namespace osu.Game.Rulesets.Mania.UI.Components
                     Masking = true,
                     Child = new Box { RelativeSizeAxes = Axes.Both }
                 },
-                content = new Container
-                {
-                    Name = "Hit objects",
-                    RelativeSizeAxes = Axes.Both,
-                },
+                hitObjectContainer
             };
+        }
 
+        [BackgroundDependencyLoader]
+        private void load(IScrollingInfo scrollingInfo)
+        {
             direction.BindTo(scrollingInfo.Direction);
             direction.BindValueChanged(direction =>
             {

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

@@ -8,10 +8,10 @@ using osu.Game.Rulesets.Objects.Drawables;
 
 namespace osu.Game.Rulesets.Mania.UI
 {
-    internal class DrawableManiaJudgement : DrawableJudgement
+    public class DrawableManiaJudgement : DrawableJudgement
     {
-        public DrawableManiaJudgement(Judgement judgement, DrawableHitObject judgedObject)
-            : base(judgement, judgedObject)
+        public DrawableManiaJudgement(JudgementResult result, DrawableHitObject judgedObject)
+            : base(result, judgedObject)
         {
         }
 
@@ -28,12 +28,13 @@ namespace osu.Game.Rulesets.Mania.UI
 
             this.FadeInFromZero(50, Easing.OutQuint);
 
-            if (Judgement.IsHit)
+            if (Result.IsHit)
             {
-                this.ScaleTo(0.8f);
-                this.ScaleTo(1, 250, Easing.OutElastic);
+                JudgementBody.ScaleTo(0.8f);
+                JudgementBody.ScaleTo(1, 250, Easing.OutElastic);
 
-                this.Delay(50).FadeOut(200).ScaleTo(0.75f, 250);
+                JudgementBody.Delay(50).ScaleTo(0.75f, 250);
+                this.Delay(50).FadeOut(200);
             }
 
             Expire();

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

@@ -1,22 +1,21 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Framework.Allocation;
 using osu.Framework.Graphics;
-using osu.Game.Rulesets.Mania.Objects;
 using osu.Framework.Graphics.Containers;
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using osu.Framework.Allocation;
 using osu.Game.Rulesets.Mania.Beatmaps;
-using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Mania.Configuration;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using OpenTK;
 
 namespace osu.Game.Rulesets.Mania.UI
 {
     public class ManiaPlayfield : ManiaScrollingPlayfield
     {
-        public List<Column> Columns => stages.SelectMany(x => x.Columns).ToList();
         private readonly List<ManiaStage> stages = new List<ManiaStage>();
 
         public ManiaPlayfield(List<StageDefinition> stageDefinitions)
@@ -27,12 +26,14 @@ namespace osu.Game.Rulesets.Mania.UI
             if (stageDefinitions.Count <= 0)
                 throw new ArgumentException("Can't have zero or fewer stages.");
 
+            Size = new Vector2(1, 0.8f);
+
             GridContainer playfieldGrid;
-            InternalChild = playfieldGrid = new GridContainer
+            AddInternal(playfieldGrid = new GridContainer
             {
                 RelativeSizeAxes = Axes.Both,
                 Content = new[] { new Drawable[stageDefinitions.Count] }
-            };
+            });
 
             var normalColumnAction = ManiaAction.Key1;
             var specialColumnAction = ManiaAction.Special1;

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

@@ -4,7 +4,6 @@
 using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Allocation;
-using osu.Framework.Configuration;
 using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Input;
@@ -25,7 +24,6 @@ using osu.Game.Rulesets.Replays;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI;
 using osu.Game.Rulesets.UI.Scrolling;
-using OpenTK;
 
 namespace osu.Game.Rulesets.Mania.UI
 {
@@ -35,8 +33,7 @@ namespace osu.Game.Rulesets.Mania.UI
 
         public IEnumerable<BarLine> BarLines;
 
-        private readonly Bindable<ManiaScrollingDirection> configDirection = new Bindable<ManiaScrollingDirection>();
-        private ScrollingInfo scrollingInfo;
+        protected new ManiaConfigManager Config => (ManiaConfigManager)base.Config;
 
         public ManiaRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap)
             : base(ruleset, beatmap)
@@ -73,9 +70,6 @@ namespace osu.Game.Rulesets.Mania.UI
         private void load()
         {
             BarLines.ForEach(Playfield.Add);
-
-            ((ManiaConfigManager)Config).BindWith(ManiaSetting.ScrollDirection, configDirection);
-            configDirection.BindValueChanged(d => scrollingInfo.Direction.Value = (ScrollingDirection)d, true);
         }
 
         private DependencyContainer dependencies;
@@ -83,11 +77,14 @@ namespace osu.Game.Rulesets.Mania.UI
         protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
         {
             dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
-            dependencies.CacheAs<IScrollingInfo>(scrollingInfo = new ScrollingInfo());
+
+            if (dependencies.Get<ManiaScrollingInfo>() == null)
+                dependencies.CacheAs<IScrollingInfo>(new ManiaScrollingInfo(Config));
+
             return dependencies;
         }
 
-        protected sealed override Playfield CreatePlayfield() => new ManiaPlayfield(Beatmap.Stages)
+        protected override Playfield CreatePlayfield() => new ManiaPlayfield(Beatmap.Stages)
         {
             Anchor = Anchor.Centre,
             Origin = Anchor.Centre,
@@ -99,7 +96,7 @@ namespace osu.Game.Rulesets.Mania.UI
 
         public override PassThroughInputManager CreateInputManager() => new ManiaInputManager(Ruleset.RulesetInfo, Variant);
 
-        protected override DrawableHitObject<ManiaHitObject> GetVisualRepresentation(ManiaHitObject h)
+        public override DrawableHitObject<ManiaHitObject> GetVisualRepresentation(ManiaHitObject h)
         {
             switch (h)
             {
@@ -112,14 +109,6 @@ namespace osu.Game.Rulesets.Mania.UI
             }
         }
 
-        protected override Vector2 PlayfieldArea => new Vector2(1, 0.8f);
-
         protected override ReplayInputHandler CreateReplayInputHandler(Replay replay) => new ManiaFramedReplayInputHandler(replay);
-
-        private class ScrollingInfo : IScrollingInfo
-        {
-            public readonly Bindable<ScrollingDirection> Direction = new Bindable<ScrollingDirection>();
-            IBindable<ScrollingDirection> IScrollingInfo.Direction => Direction;
-        }
     }
 }

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

@@ -0,0 +1,23 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Configuration;
+using osu.Game.Rulesets.Mania.Configuration;
+using osu.Game.Rulesets.UI.Scrolling;
+
+namespace osu.Game.Rulesets.Mania.UI
+{
+    public class ManiaScrollingInfo : IScrollingInfo
+    {
+        private readonly Bindable<ManiaScrollingDirection> configDirection = new Bindable<ManiaScrollingDirection>();
+
+        public readonly Bindable<ScrollingDirection> Direction = new Bindable<ScrollingDirection>();
+        IBindable<ScrollingDirection> IScrollingInfo.Direction => Direction;
+
+        public ManiaScrollingInfo(ManiaConfigManager config)
+        {
+            config.BindWith(ManiaSetting.ScrollDirection, configDirection);
+            configDirection.BindValueChanged(v => Direction.Value = (ScrollingDirection)v, true);
+        }
+    }
+}

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

@@ -7,7 +7,7 @@ using osu.Game.Rulesets.UI.Scrolling;
 
 namespace osu.Game.Rulesets.Mania.UI
 {
-    public class ManiaScrollingPlayfield : ScrollingPlayfield
+    public abstract class ManiaScrollingPlayfield : ScrollingPlayfield
     {
         private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
 

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

@@ -23,15 +23,14 @@ namespace osu.Game.Rulesets.Mania.UI
     /// <summary>
     /// A collection of <see cref="Column"/>s.
     /// </summary>
-    internal class ManiaStage : ManiaScrollingPlayfield
+    public class ManiaStage : ManiaScrollingPlayfield
     {
         public const float HIT_TARGET_POSITION = 50;
 
         public IReadOnlyList<Column> Columns => columnFlow.Children;
         private readonly FillFlowContainer<Column> columnFlow;
 
-        protected override Container<Drawable> Content => barLineContainer;
-        private readonly Container<Drawable> barLineContainer;
+        private readonly Container barLineContainer;
 
         public Container<DrawableManiaJudgement> Judgements => judgements;
         private readonly JudgementContainer<DrawableManiaJudgement> judgements;
@@ -105,6 +104,7 @@ namespace osu.Game.Rulesets.Mania.UI
                                 Anchor = Anchor.TopCentre,
                                 Origin = Anchor.TopCentre,
                                 RelativeSizeAxes = Axes.Y,
+                                Child = HitObjectContainer
                             }
                         },
                         judgements = new JudgementContainer<DrawableManiaJudgement>
@@ -156,18 +156,18 @@ namespace osu.Game.Rulesets.Mania.UI
             var maniaObject = (ManiaHitObject)h.HitObject;
             int columnIndex = maniaObject.Column - firstColumnIndex;
             Columns.ElementAt(columnIndex).Add(h);
-            h.OnJudgement += OnJudgement;
+            h.OnNewResult += OnNewResult;
         }
 
         public void Add(BarLine barline) => base.Add(new DrawableBarLine(barline));
 
-        internal void OnJudgement(DrawableHitObject judgedObject, Judgement judgement)
+        internal void OnNewResult(DrawableHitObject judgedObject, JudgementResult result)
         {
-            if (!judgedObject.DisplayJudgement || !DisplayJudgements)
+            if (!judgedObject.DisplayResult || !DisplayJudgements)
                 return;
 
             judgements.Clear();
-            judgements.Add(new DrawableManiaJudgement(judgement, judgedObject)
+            judgements.Add(new DrawableManiaJudgement(result, judgedObject)
             {
                 Anchor = Anchor.Centre,
                 Origin = Anchor.Centre,

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

@@ -0,0 +1,64 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System.IO;
+using System.Linq;
+using System.Text;
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Tests.Beatmaps;
+using Decoder = osu.Game.Beatmaps.Formats.Decoder;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    [TestFixture]
+    public class StackingTest
+    {
+        [Test]
+        public void TestStacking()
+        {
+            using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(beatmap_data)))
+            using (var reader = new StreamReader(stream))
+            {
+                var beatmap = Decoder.GetDecoder<Beatmap>(reader).Decode(reader);
+                var converted = new TestWorkingBeatmap(beatmap).GetPlayableBeatmap(new OsuRuleset().RulesetInfo);
+
+                var objects = converted.HitObjects.ToList();
+
+                // The last hitobject triggers the stacking
+                for (int i = 0; i < objects.Count - 1; i++)
+                    Assert.AreEqual(0, ((OsuHitObject)objects[i]).StackHeight);
+            }
+        }
+
+        private const string beatmap_data = @"
+osu file format v14
+
+[General]
+StackLeniency: 0.2
+
+[Difficulty]
+ApproachRate:9.2
+SliderMultiplier:1
+SliderTickRate:0.5
+
+[TimingPoints]
+217871,6400,4,2,1,20,1,0
+217871,-800,4,2,1,20,0,0
+218071,-787.5,4,2,1,20,0,0
+218271,-775,4,2,1,20,0,0
+218471,-762.5,4,2,1,20,0,0
+218671,-750,4,2,1,20,0,0
+240271,-10,4,2,0,5,0,0
+
+[HitObjects]
+311,185,217871,6,0,L|318:158,1,25
+311,185,218071,2,0,L|335:170,1,25
+311,185,218271,2,0,L|338:192,1,25
+311,185,218471,2,0,L|325:209,1,25
+311,185,218671,2,0,L|304:212,1,25
+311,185,240271,5,0,0:0:0:0:
+";
+    }
+}

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

@@ -5,12 +5,10 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
-using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
 using osu.Game.Tests.Visual;
 using OpenTK;
-using osu.Game.Rulesets.Osu.Judgements;
 using System.Collections.Generic;
 using System;
 using osu.Game.Rulesets.Mods;
@@ -87,7 +85,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             }
         }
 
-        private class TestDrawableHitCircle : DrawableHitCircle
+        protected class TestDrawableHitCircle : DrawableHitCircle
         {
             private readonly bool auto;
 
@@ -96,19 +94,17 @@ namespace osu.Game.Rulesets.Osu.Tests
                 this.auto = auto;
             }
 
-            protected override void CheckForJudgements(bool userTriggered, double timeOffset)
+            public void TriggerJudgement() => UpdateResult(true);
+
+            protected override void CheckForResult(bool userTriggered, double timeOffset)
             {
                 if (auto && !userTriggered && timeOffset > 0)
                 {
                     // force success
-                    AddJudgement(new OsuJudgement
-                    {
-                        Result = HitResult.Great
-                    });
-                    State.Value = ArmedState.Hit;
+                    ApplyResult(r => r.Type = HitResult.Great);
                 }
                 else
-                    base.CheckForJudgements(userTriggered, timeOffset);
+                    base.CheckForResult(userTriggered, timeOffset);
             }
         }
     }

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

@@ -0,0 +1,19 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseHitCirclePlacementMask : HitObjectPlacementMaskTestCase
+    {
+        protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableHitCircle((HitCircle)hitObject);
+        protected override PlacementMask CreateMask() => new HitCirclePlacementMask();
+    }
+}

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

@@ -0,0 +1,29 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseHitCircleSelectionMask : HitObjectSelectionMaskTestCase
+    {
+        private readonly DrawableHitCircle drawableObject;
+
+        public TestCaseHitCircleSelectionMask()
+        {
+            var hitCircle = new HitCircle { Position = new Vector2(256, 192) };
+            hitCircle.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 });
+
+            Add(drawableObject = new DrawableHitCircle(hitCircle));
+        }
+
+        protected override SelectionMask CreateMask() => new HitCircleSelectionMask(drawableObject);
+    }
+}

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

@@ -0,0 +1,23 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Graphics;
+using osu.Framework.MathUtils;
+using osu.Game.Rulesets.Scoring;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseShaking : TestCaseHitCircle
+    {
+        public override void Add(Drawable drawable)
+        {
+            base.Add(drawable);
+
+            if (drawable is TestDrawableHitCircle hitObject)
+            {
+                Scheduler.AddDelayed(() => hitObject.TriggerJudgement(),
+                    hitObject.HitObject.StartTime - (hitObject.HitObject.HitWindows.HalfWindowFor(HitResult.Miss) + RNG.Next(0, 300)) - Time.Current);
+            }
+        }
+    }
+}

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

@@ -108,7 +108,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(239, 176),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(154, 28),
@@ -141,7 +141,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(-(distance / 2), 0),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(distance, 0),
@@ -161,7 +161,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(-200, 0),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(200, 200),
@@ -181,10 +181,10 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             var slider = new Slider
             {
-                CurveType = CurveType.Linear,
+                PathType = PathType.Linear,
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(-200, 0),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(150, 75),
@@ -207,10 +207,10 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             var slider = new Slider
             {
-                CurveType = CurveType.Bezier,
+                PathType = PathType.Bezier,
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(-200, 0),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(150, 75),
@@ -232,10 +232,10 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             var slider = new Slider
             {
-                CurveType = CurveType.Linear,
+                PathType = PathType.Linear,
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(0, 0),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(-200, 0),
@@ -264,8 +264,8 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(-100, 0),
-                CurveType = CurveType.Catmull,
-                ControlPoints = new List<Vector2>
+                PathType = PathType.Catmull,
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(50, -50),
@@ -304,13 +304,13 @@ namespace osu.Game.Rulesets.Osu.Tests
             foreach (var mod in Mods.OfType<IApplicableToDrawableHitObjects>())
                 mod.ApplyToDrawableHitObjects(new[] { drawable });
 
-            drawable.OnJudgement += onJudgement;
+            drawable.OnNewResult += onNewResult;
 
             Add(drawable);
         }
 
         private float judgementOffsetDirection = 1;
-        private void onJudgement(DrawableHitObject judgedObject, Judgement judgement)
+        private void onNewResult(DrawableHitObject judgedObject, JudgementResult result)
         {
             var osuObject = judgedObject as DrawableOsuHitObject;
             if (osuObject == null)
@@ -321,8 +321,8 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 Anchor = Anchor.Centre,
                 Origin = Anchor.Centre,
-                Text = judgement.IsHit ? "Hit!" : "Miss!",
-                Colour = judgement.IsHit ? Color4.Green : Color4.Red,
+                Text = result.IsHit ? "Hit!" : "Miss!",
+                Colour = result.IsHit ? Color4.Green : Color4.Red,
                 TextSize = 30,
                 Position = osuObject.HitObject.StackedEndPosition + judgementOffsetDirection * new Vector2(0, 45)
             });

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

@@ -0,0 +1,19 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseSliderPlacementMask : HitObjectPlacementMaskTestCase
+    {
+        protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableSlider((Slider)hitObject);
+        protected override PlacementMask CreateMask() => new SliderPlacementMask();
+    }
+}

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

@@ -0,0 +1,55 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.Collections.Generic;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseSliderSelectionMask : HitObjectSelectionMaskTestCase
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(SliderSelectionMask),
+            typeof(SliderCircleSelectionMask),
+            typeof(SliderBodyPiece),
+            typeof(SliderCircle),
+            typeof(PathControlPointVisualiser),
+            typeof(PathControlPointPiece)
+        };
+
+        private readonly DrawableSlider drawableObject;
+
+        public TestCaseSliderSelectionMask()
+        {
+            var slider = new Slider
+            {
+                Position = new Vector2(256, 192),
+                ControlPoints = new[]
+                {
+                    Vector2.Zero,
+                    new Vector2(150, 150),
+                    new Vector2(300, 0)
+                },
+                PathType = PathType.Bezier,
+                Distance = 350
+            };
+
+            slider.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 });
+
+            Add(drawableObject = new DrawableSlider(slider));
+        }
+
+        protected override SelectionMask CreateMask() => new SliderSelectionMask(drawableObject);
+    }
+}

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

@@ -72,7 +72,7 @@ namespace osu.Game.Rulesets.Osu.Tests
                 this.auto = auto;
             }
 
-            protected override void CheckForJudgements(bool userTriggered, double timeOffset)
+            protected override void CheckForResult(bool userTriggered, double timeOffset)
             {
                 if (auto && !userTriggered && Time.Current > Spinner.StartTime + Spinner.Duration / 2 && Progress < 1)
                 {
@@ -81,7 +81,7 @@ namespace osu.Game.Rulesets.Osu.Tests
                     auto = false;
                 }
 
-                base.CheckForJudgements(userTriggered, timeOffset);
+                base.CheckForResult(userTriggered, timeOffset);
             }
         }
     }

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

@@ -0,0 +1,20 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseSpinnerPlacementMask : HitObjectPlacementMaskTestCase
+    {
+        protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableSpinner((Spinner)hitObject);
+
+        protected override PlacementMask CreateMask() => new SpinnerPlacementMask();
+    }
+}

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

@@ -0,0 +1,50 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.Collections.Generic;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks;
+using osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseSpinnerSelectionMask : HitObjectSelectionMaskTestCase
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(SpinnerSelectionMask),
+            typeof(SpinnerPiece)
+        };
+
+        private readonly DrawableSpinner drawableSpinner;
+
+        public TestCaseSpinnerSelectionMask()
+        {
+            var spinner = new Spinner
+            {
+                Position = new Vector2(256, 256),
+                StartTime = -1000,
+                EndTime = 2000
+            };
+            spinner.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 });
+
+            Add(new Container
+            {
+                RelativeSizeAxes = Axes.Both,
+                Size = new Vector2(0.5f),
+                Child = drawableSpinner = new DrawableSpinner(spinner)
+            });
+        }
+
+        protected override SelectionMask CreateMask() => new SpinnerSelectionMask(drawableSpinner) { Size = new Vector2(0.5f) };
+    }
+}

osu.Game.Rulesets.Osu.Tests/osu.Game.Rulesets.Osu.Tests.csproj

@@ -2,9 +2,10 @@
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.8.0" />
-    <PackageReference Include="NUnit" Version="3.10.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Include="NUnit" Version="3.11.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.10.0" />
+    <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>

osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapConverter.cs

@@ -12,7 +12,7 @@ using osu.Game.Rulesets.Osu.UI;
 
 namespace osu.Game.Rulesets.Osu.Beatmaps
 {
-    internal class OsuBeatmapConverter : BeatmapConverter<OsuHitObject>
+    public class OsuBeatmapConverter : BeatmapConverter<OsuHitObject>
     {
         public OsuBeatmapConverter(IBeatmap beatmap)
             : base(beatmap)
@@ -36,13 +36,17 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
                     StartTime = original.StartTime,
                     Samples = original.Samples,
                     ControlPoints = curveData.ControlPoints,
-                    CurveType = curveData.CurveType,
+                    PathType = curveData.PathType,
                     Distance = curveData.Distance,
                     RepeatSamples = curveData.RepeatSamples,
                     RepeatCount = curveData.RepeatCount,
                     Position = positionData?.Position ?? Vector2.Zero,
                     NewCombo = comboData?.NewCombo ?? false,
-                    LegacyLastTickOffset = legacyOffset?.LegacyLastTickOffset
+                    ComboOffset = comboData?.ComboOffset ?? 0,
+                    LegacyLastTickOffset = legacyOffset?.LegacyLastTickOffset,
+                    // prior to v8, speed multipliers don't adjust for how many ticks are generated over the same distance.
+                    // this results in more (or less) ticks being generated in <v8 maps for the same time duration.
+                    TickDistanceMultiplier = beatmap.BeatmapInfo.BeatmapVersion < 8 ? 1f / beatmap.ControlPointInfo.DifficultyPointAt(original.StartTime).SpeedMultiplier : 1
                 };
             }
             else if (endTimeData != null)
@@ -52,7 +56,9 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
                     StartTime = original.StartTime,
                     Samples = original.Samples,
                     EndTime = endTimeData.EndTime,
-                    Position = positionData?.Position ?? OsuPlayfield.BASE_SIZE / 2
+                    Position = positionData?.Position ?? OsuPlayfield.BASE_SIZE / 2,
+                    NewCombo = comboData?.NewCombo ?? false,
+                    ComboOffset = comboData?.ComboOffset ?? 0,
                 };
             }
             else
@@ -62,7 +68,8 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
                     StartTime = original.StartTime,
                     Samples = original.Samples,
                     Position = positionData?.Position ?? Vector2.Zero,
-                    NewCombo = comboData?.NewCombo ?? false
+                    NewCombo = comboData?.NewCombo ?? false,
+                    ComboOffset = comboData?.ComboOffset ?? 0,
                 };
             }
         }

osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapProcessor.cs

@@ -8,27 +8,33 @@ using osu.Game.Rulesets.Osu.Objects;
 
 namespace osu.Game.Rulesets.Osu.Beatmaps
 {
-    internal class OsuBeatmapProcessor : BeatmapProcessor
+    public class OsuBeatmapProcessor : BeatmapProcessor
     {
+        private const int stack_distance = 3;
+
         public OsuBeatmapProcessor(IBeatmap beatmap)
             : base(beatmap)
         {
         }
 
-        public override void PreProcess()
+        public override void PostProcess()
         {
-            base.PreProcess();
-            applyStacking((Beatmap<OsuHitObject>)Beatmap);
+            base.PostProcess();
+
+            var osuBeatmap = (Beatmap<OsuHitObject>)Beatmap;
+
+            // Reset stacking
+            foreach (var h in osuBeatmap.HitObjects)
+                h.StackHeight = 0;
+
+            if (Beatmap.BeatmapInfo.BeatmapVersion >= 6)
+                applyStacking(osuBeatmap);
+            else
+                applyStackingOld(osuBeatmap);
         }
 
         private void applyStacking(Beatmap<OsuHitObject> beatmap)
         {
-            const int stack_distance = 3;
-
-            // Reset stacking
-            for (int i = 0; i <= beatmap.HitObjects.Count - 1; i++)
-                beatmap.HitObjects[i].StackHeight = 0;
-
             // Extend the end index to include objects they are stacked on
             int extendedEndIndex = beatmap.HitObjects.Count - 1;
             for (int i = beatmap.HitObjects.Count - 1; i >= 0; i--)
@@ -167,5 +173,40 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
                 }
             }
         }
+
+        private void applyStackingOld(Beatmap<OsuHitObject> beatmap)
+        {
+            for (int i = 0; i < beatmap.HitObjects.Count; i++)
+            {
+                OsuHitObject currHitObject = beatmap.HitObjects[i];
+
+                if (currHitObject.StackHeight != 0 && !(currHitObject is Slider))
+                    continue;
+
+                double startTime = (currHitObject as IHasEndTime)?.EndTime ?? currHitObject.StartTime;
+                int sliderStack = 0;
+
+                for (int j = i + 1; j < beatmap.HitObjects.Count; j++)
+                {
+                    double stackThreshold = beatmap.HitObjects[i].TimePreempt * beatmap.BeatmapInfo.StackLeniency;
+
+                    if (beatmap.HitObjects[j].StartTime - stackThreshold > startTime)
+                        break;
+
+                    if (Vector2Extensions.Distance(beatmap.HitObjects[j].Position, currHitObject.Position) < stack_distance)
+                    {
+                        currHitObject.StackHeight++;
+                        startTime = (beatmap.HitObjects[j] as IHasEndTime)?.EndTime ?? beatmap.HitObjects[i].StartTime;
+                    }
+                    else if (Vector2Extensions.Distance(beatmap.HitObjects[j].Position, currHitObject.EndPosition) < stack_distance)
+                    {
+                        //Case for sliders - bump notes down and right, rather than up and left.
+                        sliderStack++;
+                        beatmap.HitObjects[j].StackHeight -= sliderStack;
+                        startTime = (beatmap.HitObjects[j] as IHasEndTime)?.EndTime ?? beatmap.HitObjects[i].StartTime;
+                    }
+                }
+            }
+        }
     }
 }

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

@@ -38,7 +38,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             double sectionLength = section_length * timeRate;
 
             // The first object doesn't generate a strain, so we begin with an incremented section end
-            double currentSectionEnd = 2 * sectionLength;
+            double currentSectionEnd = Math.Ceiling(beatmap.HitObjects.First().StartTime / sectionLength) * sectionLength;
 
             foreach (OsuDifficultyHitObject h in difficultyBeatmap)
             {
@@ -65,7 +65,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             double hitWindowGreat = (int)(beatmap.HitObjects.First().HitWindows.Great / 2) / timeRate;
             double preempt = (int)BeatmapDifficulty.DifficultyRange(beatmap.BeatmapInfo.BaseDifficulty.ApproachRate, 1800, 1200, 450) / timeRate;
 
-            int maxCombo = beatmap.HitObjects.Count();
+            int maxCombo = beatmap.HitObjects.Count;
             // Add the ticks + tail of the slider. 1 is subtracted because the head circle would be counted twice (once for the slider itself in the line above)
             maxCombo += beatmap.HitObjects.OfType<Slider>().Sum(s => s.NestedHitObjects.Count - 1);
 

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

@@ -34,7 +34,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
         {
             countHitCircles = Beatmap.HitObjects.Count(h => h is HitCircle);
 
-            beatmapMaxCombo = Beatmap.HitObjects.Count();
+            beatmapMaxCombo = Beatmap.HitObjects.Count;
             // Add the ticks + tail of the slider. 1 is subtracted because the "headcircle" would be counted twice (once for the slider itself in the line above)
             beatmapMaxCombo += Beatmap.HitObjects.OfType<Slider>().Sum(s => s.NestedHitObjects.Count - 1);
         }

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

@@ -3,6 +3,7 @@
 
 using System.Collections;
 using System.Collections.Generic;
+using System.Linq;
 using osu.Game.Rulesets.Osu.Objects;
 
 namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
@@ -23,8 +24,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
         {
             // Sort OsuHitObjects by StartTime - they are not correctly ordered in some cases.
             // This should probably happen before the objects reach the difficulty calculator.
-            objects.Sort((a, b) => a.StartTime.CompareTo(b.StartTime));
-            difficultyObjects = createDifficultyObjectEnumerator(objects, timeRate);
+            difficultyObjects = createDifficultyObjectEnumerator(objects.OrderBy(h => h.StartTime).ToList(), timeRate);
         }
 
         /// <summary>

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

@@ -21,15 +21,25 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
         public OsuHitObject BaseObject { get; }
 
         /// <summary>
-        /// Normalized distance from the <see cref="OsuHitObject.StackedPosition"/> of the previous <see cref="OsuDifficultyHitObject"/>.
+        /// Normalized distance from the end position of the previous <see cref="OsuDifficultyHitObject"/> to the start position of this <see cref="OsuDifficultyHitObject"/>.
         /// </summary>
-        public double Distance { get; private set; }
+        public double JumpDistance { get; private set; }
+
+        /// <summary>
+        /// Normalized distance between the start and end position of the previous <see cref="OsuDifficultyHitObject"/>.
+        /// </summary>
+        public double TravelDistance { get; private set; }
 
         /// <summary>
         /// Milliseconds elapsed since the StartTime of the previous <see cref="OsuDifficultyHitObject"/>.
         /// </summary>
         public double DeltaTime { get; private set; }
 
+        /// <summary>
+        /// Milliseconds elapsed since the start time of the previous <see cref="OsuDifficultyHitObject"/>, with a minimum of 50ms.
+        /// </summary>
+        public double StrainTime { get; private set; }
+
         private readonly OsuHitObject lastObject;
         private readonly double timeRate;
 
@@ -51,31 +61,35 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
         private void setDistances()
         {
             // We will scale distances by this factor, so we can assume a uniform CircleSize among beatmaps.
-            double scalingFactor = normalized_radius / BaseObject.Radius;
+            float scalingFactor = normalized_radius / (float)BaseObject.Radius;
             if (BaseObject.Radius < 30)
             {
-                double smallCircleBonus = Math.Min(30 - BaseObject.Radius, 5) / 50;
+                float smallCircleBonus = Math.Min(30 - (float)BaseObject.Radius, 5) / 50;
                 scalingFactor *= 1 + smallCircleBonus;
             }
 
             Vector2 lastCursorPosition = lastObject.StackedPosition;
-            float lastTravelDistance = 0;
 
             var lastSlider = lastObject as Slider;
             if (lastSlider != null)
             {
                 computeSliderCursorPosition(lastSlider);
                 lastCursorPosition = lastSlider.LazyEndPosition ?? lastCursorPosition;
-                lastTravelDistance = lastSlider.LazyTravelDistance;
+
+                TravelDistance = lastSlider.LazyTravelDistance * scalingFactor;
             }
 
-            Distance = (lastTravelDistance + (BaseObject.StackedPosition - lastCursorPosition).Length) * scalingFactor;
+            // Don't need to jump to reach spinners
+            if (!(BaseObject is Spinner))
+                JumpDistance = (BaseObject.StackedPosition * scalingFactor - lastCursorPosition * scalingFactor).Length;
         }
 
         private void setTimingValues()
         {
-            // Every timing inverval is hard capped at the equivalent of 375 BPM streaming speed as a safety measure.
-            DeltaTime = Math.Max(50, (BaseObject.StartTime - lastObject.StartTime) / timeRate);
+            DeltaTime = (BaseObject.StartTime - lastObject.StartTime) / timeRate;
+
+            // Every strain interval is hard capped at the equivalent of 375 BPM streaming speed as a safety measure
+            StrainTime = Math.Max(50, DeltaTime);
         }
 
         private void computeSliderCursorPosition(Slider slider)
@@ -87,8 +101,14 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
             float approxFollowCircleRadius = (float)(slider.Radius * 3);
             var computeVertex = new Action<double>(t =>
             {
+                double progress = ((int)t - (int)slider.StartTime) / (float)(int)slider.SpanDuration;
+                if (progress % 2 > 1)
+                    progress = 1 - progress % 1;
+                else
+                    progress = progress % 1;
+
                 // ReSharper disable once PossibleInvalidOperationException (bugged in current r# version)
-                var diff = slider.StackedPositionAt(t) - slider.LazyEndPosition.Value;
+                var diff = slider.StackedPosition + slider.Path.PositionAt(progress) - slider.LazyEndPosition.Value;
                 float dist = diff.Length;
 
                 if (dist > approxFollowCircleRadius)

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

@@ -14,6 +14,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
         protected override double SkillMultiplier => 26.25;
         protected override double StrainDecayBase => 0.15;
 
-        protected override double StrainValueOf(OsuDifficultyHitObject current) => Math.Pow(current.Distance, 0.99) / current.DeltaTime;
+        protected override double StrainValueOf(OsuDifficultyHitObject current)
+            => (Math.Pow(current.TravelDistance, 0.99) + Math.Pow(current.JumpDistance, 0.99)) / current.StrainTime;
     }
 }

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

@@ -19,7 +19,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
 
         protected override double StrainValueOf(OsuDifficultyHitObject current)
         {
-            double distance = current.Distance;
+            double distance = current.TravelDistance + current.JumpDistance;
 
             double speedValue;
             if (distance > single_spacing_threshold)
@@ -33,7 +33,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
             else
                 speedValue = 0.95;
 
-            return speedValue / current.DeltaTime;
+            return speedValue / current.StrainTime;
         }
     }
 }

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

@@ -0,0 +1,20 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Tools;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public class HitCircleCompositionTool : HitObjectCompositionTool
+    {
+        public HitCircleCompositionTool()
+            : base(nameof(HitCircle))
+        {
+        }
+
+        public override PlacementMask CreatePlacementMask() => new HitCirclePlacementMask();
+    }
+}

osu.Game.Rulesets.Osu/Edit/Layers/Selection/Overlays/HitCircleMask.cs

@@ -1,37 +0,0 @@
-// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
-// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
-
-using osu.Framework.Graphics;
-using osu.Framework.Allocation;
-using osu.Game.Graphics;
-using osu.Game.Rulesets.Edit;
-using osu.Game.Rulesets.Osu.Objects.Drawables;
-using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
-
-namespace osu.Game.Rulesets.Osu.Edit.Layers.Selection.Overlays
-{
-    public class HitCircleMask : HitObjectMask
-    {
-        public HitCircleMask(DrawableHitCircle hitCircle)
-            : base(hitCircle)
-        {
-            Origin = Anchor.Centre;
-
-            Position = hitCircle.Position;
-            Size = hitCircle.Size;
-            Scale = hitCircle.Scale;
-
-            CornerRadius = Size.X / 2;
-
-            AddInternal(new RingPiece());
-
-            hitCircle.HitObject.PositionChanged += _ => Position = hitCircle.Position;
-        }
-
-        [BackgroundDependencyLoader]
-        private void load(OsuColour colours)
-        {
-            Colour = colours.Yellow;
-        }
-    }
-}

osu.Game.Rulesets.Osu/Edit/Layers/Selection/Overlays/SliderCircleMask.cs

@@ -1,61 +0,0 @@
-// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
-// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
-
-using osu.Framework.Allocation;
-using osu.Framework.Graphics;
-using osu.Game.Graphics;
-using osu.Game.Rulesets.Edit;
-using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Rulesets.Osu.Objects.Drawables;
-using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
-using OpenTK;
-
-namespace osu.Game.Rulesets.Osu.Edit.Layers.Selection.Overlays
-{
-    public class SliderCircleMask : HitObjectMask
-    {
-        public SliderCircleMask(DrawableHitCircle sliderHead, DrawableSlider slider)
-            : this(sliderHead, Vector2.Zero, slider)
-        {
-        }
-
-        public SliderCircleMask(DrawableSliderTail sliderTail, DrawableSlider slider)
-            : this(sliderTail, ((Slider)slider.HitObject).Curve.PositionAt(1), slider)
-        {
-        }
-
-        private readonly DrawableOsuHitObject hitObject;
-
-        private SliderCircleMask(DrawableOsuHitObject hitObject, Vector2 position, DrawableSlider slider)
-            : base(hitObject)
-        {
-            this.hitObject = hitObject;
-
-            Origin = Anchor.Centre;
-
-            Position = position;
-            Size = slider.HeadCircle.Size;
-            Scale = slider.HeadCircle.Scale;
-
-            AddInternal(new RingPiece());
-
-            Select();
-        }
-
-        [BackgroundDependencyLoader]
-        private void load(OsuColour colours)
-        {
-            Colour = colours.Yellow;
-        }
-
-        protected override void Update()
-        {
-            base.Update();
-
-            RelativeAnchorPosition = hitObject.RelativeAnchorPosition;
-        }
-
-        // Todo: This is temporary, since the slider circle masks don't do anything special yet. In the future they will handle input.
-        public override bool HandleMouseInput => false;
-    }
-}

osu.Game.Rulesets.Osu/Edit/Layers/Selection/Overlays/SliderMask.cs

@@ -1,67 +0,0 @@
-// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
-// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
-
-using osu.Framework.Allocation;
-using osu.Framework.Graphics;
-using osu.Framework.Graphics.Primitives;
-using osu.Game.Graphics;
-using osu.Game.Rulesets.Edit;
-using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Rulesets.Osu.Objects.Drawables;
-using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
-using OpenTK;
-using OpenTK.Graphics;
-
-namespace osu.Game.Rulesets.Osu.Edit.Layers.Selection.Overlays
-{
-    public class SliderMask : HitObjectMask
-    {
-        private readonly SliderBody body;
-        private readonly DrawableSlider slider;
-
-        public SliderMask(DrawableSlider slider)
-            : base(slider)
-        {
-            this.slider = slider;
-
-            Position = slider.Position;
-
-            var sliderObject = (Slider)slider.HitObject;
-
-            InternalChildren = new Drawable[]
-            {
-                body = new SliderBody(sliderObject)
-                {
-                    AccentColour = Color4.Transparent,
-                    PathWidth = sliderObject.Scale * 64
-                },
-                new SliderCircleMask(slider.HeadCircle, slider),
-                new SliderCircleMask(slider.TailCircle, slider),
-            };
-
-            sliderObject.PositionChanged += _ => Position = slider.Position;
-        }
-
-        [BackgroundDependencyLoader]
-        private void load(OsuColour colours)
-        {
-            body.BorderColour = colours.Yellow;
-        }
-
-        protected override void Update()
-        {
-            base.Update();
-
-            Size = slider.Size;
-            OriginPosition = slider.OriginPosition;
-
-            // Need to cause one update
-            body.UpdateProgress(0);
-        }
-
-        public override bool ReceiveMouseInputAt(Vector2 screenSpacePos) => body.ReceiveMouseInputAt(screenSpacePos);
-
-        public override Vector2 SelectionPoint => ToScreenSpace(OriginPosition);
-        public override Quad SelectionQuad => body.PathDrawQuad;
-    }
-}

osu.Game.Rulesets.Osu/Edit/Masks/HitCircleMasks/Components/HitCirclePiece.cs

@@ -0,0 +1,44 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks.Components
+{
+    public class HitCirclePiece : CompositeDrawable
+    {
+        private readonly HitCircle hitCircle;
+
+        public HitCirclePiece(HitCircle hitCircle)
+        {
+            this.hitCircle = hitCircle;
+            Origin = Anchor.Centre;
+
+            Size = new Vector2((float)OsuHitObject.OBJECT_RADIUS * 2);
+            Scale = new Vector2(hitCircle.Scale);
+            CornerRadius = Size.X / 2;
+
+            InternalChild = new RingPiece();
+
+            hitCircle.PositionChanged += _ => UpdatePosition();
+            hitCircle.StackHeightChanged += _ => UpdatePosition();
+            hitCircle.ScaleChanged += _ => Scale = new Vector2(hitCircle.Scale);
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            Colour = colours.Yellow;
+
+            UpdatePosition();
+        }
+
+        protected virtual void UpdatePosition() => Position = hitCircle.StackedPosition;
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/HitCircleMasks/HitCirclePlacementMask.cs

@@ -0,0 +1,42 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Input.Events;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks
+{
+    public class HitCirclePlacementMask : PlacementMask
+    {
+        public new HitCircle HitObject => (HitCircle)base.HitObject;
+
+        public HitCirclePlacementMask()
+            : base(new HitCircle())
+        {
+            InternalChild = new HitCirclePiece(HitObject);
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            // Fixes a 1-frame position discrpancy due to the first mouse move event happening in the next frame
+            HitObject.Position = GetContainingInputManager().CurrentState.Mouse.Position;
+        }
+
+        protected override bool OnClick(ClickEvent e)
+        {
+            HitObject.StartTime = EditorClock.CurrentTime;
+            EndPlacement();
+            return true;
+        }
+
+        protected override bool OnMouseMove(MouseMoveEvent e)
+        {
+            HitObject.Position = e.MousePosition;
+            return true;
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/HitCircleMasks/HitCircleSelectionMask.cs

@@ -0,0 +1,19 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks
+{
+    public class HitCircleSelectionMask : SelectionMask
+    {
+        public HitCircleSelectionMask(DrawableHitCircle hitCircle)
+            : base(hitCircle)
+        {
+            InternalChild = new HitCirclePiece((HitCircle)hitCircle.HitObject);
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/Components/PathControlPointPiece.cs

@@ -0,0 +1,113 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Lines;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Input.Events;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Osu.Objects;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components
+{
+    public class PathControlPointPiece : CompositeDrawable
+    {
+        private readonly Slider slider;
+        private readonly int index;
+
+        private readonly Path path;
+        private readonly CircularContainer marker;
+
+        [Resolved]
+        private OsuColour colours { get; set; }
+
+        public PathControlPointPiece(Slider slider, int index)
+        {
+            this.slider = slider;
+            this.index = index;
+
+            Origin = Anchor.Centre;
+            AutoSizeAxes = Axes.Both;
+
+            InternalChildren = new Drawable[]
+            {
+                path = new SmoothPath
+                {
+                    Anchor = Anchor.Centre,
+                    PathWidth = 1
+                },
+                marker = new CircularContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(10),
+                    Masking = true,
+                    Child = new Box { RelativeSizeAxes = Axes.Both }
+                }
+            };
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            Position = slider.StackedPosition + slider.ControlPoints[index];
+
+            marker.Colour = isSegmentSeparator ? colours.Red : colours.Yellow;
+
+            path.ClearVertices();
+
+            if (index != slider.ControlPoints.Length - 1)
+            {
+                path.AddVertex(Vector2.Zero);
+                path.AddVertex(slider.ControlPoints[index + 1] - slider.ControlPoints[index]);
+            }
+
+            path.OriginPosition = path.PositionInBoundingBox(Vector2.Zero);
+        }
+
+        public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => marker.ReceivePositionalInputAt(screenSpacePos);
+
+        protected override bool OnDragStart(DragStartEvent e) => true;
+
+        protected override bool OnDrag(DragEvent e)
+        {
+            var newControlPoints = slider.ControlPoints.ToArray();
+
+            if (index == 0)
+            {
+                // Special handling for the head - only the position of the slider changes
+                slider.Position += e.Delta;
+
+                // Since control points are relative to the position of the slider, they all need to be offset backwards by the delta
+                for (int i = 1; i < newControlPoints.Length; i++)
+                    newControlPoints[i] -= e.Delta;
+            }
+            else
+                newControlPoints[index] += e.Delta;
+
+            if (isSegmentSeparatorWithNext)
+                newControlPoints[index + 1] = newControlPoints[index];
+
+            if (isSegmentSeparatorWithPrevious)
+                newControlPoints[index - 1] = newControlPoints[index];
+
+            slider.ControlPoints = newControlPoints;
+            slider.Path.Calculate(true);
+
+            return true;
+        }
+
+        protected override bool OnDragEnd(DragEndEvent e) => true;
+
+        private bool isSegmentSeparator => isSegmentSeparatorWithNext || isSegmentSeparatorWithPrevious;
+
+        private bool isSegmentSeparatorWithNext => index < slider.ControlPoints.Length - 1 && slider.ControlPoints[index + 1] == slider.ControlPoints[index];
+
+        private bool isSegmentSeparatorWithPrevious => index > 0 && slider.ControlPoints[index - 1] == slider.ControlPoints[index];
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/Components/PathControlPointVisualiser.cs

@@ -0,0 +1,34 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components
+{
+    public class PathControlPointVisualiser : CompositeDrawable
+    {
+        private readonly Slider slider;
+
+        private readonly Container<PathControlPointPiece> pieces;
+
+        public PathControlPointVisualiser(Slider slider)
+        {
+            this.slider = slider;
+
+            InternalChild = pieces = new Container<PathControlPointPiece> { RelativeSizeAxes = Axes.Both };
+
+            slider.ControlPointsChanged += _ => updatePathControlPoints();
+            updatePathControlPoints();
+        }
+
+        private void updatePathControlPoints()
+        {
+            while (slider.ControlPoints.Length > pieces.Count)
+                pieces.Add(new PathControlPointPiece(slider, pieces.Count));
+            while (slider.ControlPoints.Length < pieces.Count)
+                pieces.Remove(pieces[pieces.Count - 1]);
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/Components/SliderBodyPiece.cs

@@ -0,0 +1,59 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System.Collections.Generic;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
+using OpenTK;
+using OpenTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components
+{
+    public class SliderBodyPiece : CompositeDrawable
+    {
+        private readonly Slider slider;
+        private readonly ManualSliderBody body;
+
+        public SliderBodyPiece(Slider slider)
+        {
+            this.slider = slider;
+
+            InternalChild = body = new ManualSliderBody
+            {
+                AccentColour = Color4.Transparent,
+                PathWidth = slider.Scale * 64
+            };
+
+            slider.PositionChanged += _ => updatePosition();
+            slider.ScaleChanged += _ => body.PathWidth = slider.Scale * 64;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            body.BorderColour = colours.Yellow;
+
+            updatePosition();
+        }
+
+        private void updatePosition() => Position = slider.StackedPosition;
+
+        protected override void Update()
+        {
+            base.Update();
+
+            slider.Path.Calculate();
+
+            var vertices = new List<Vector2>();
+            slider.Path.GetPathToProgress(vertices, 0, 1);
+
+            body.SetVertices(vertices);
+
+            Size = body.Size;
+            OriginPosition = body.PathOffset;
+        }
+    }
+}