Merge remote-tracking branch 'upstream/master' into fix-ios-import

.github/ISSUE_TEMPLATE/mobile-issues.md

@@ -0,0 +1,8 @@
+---
+name: Mobile Report
+about: ⚠ Due to current development priorities we are not accepting mobile reports at this time (unless you're willing to fix them yourself!)
+---
+
+⚠ **PLEASE READ** ⚠: Due to prioritising finishing the client for desktop first we are not accepting reports related to mobile platforms for the time being, unless you're willing to fix them.
+If you'd like to report a problem or suggest a feature and then work on it, feel free to open an issue and highlight that you'd like to address it yourself in the issue body; mobile pull requests are also welcome.
+Otherwise, please check back in the future when the focus of development shifts towards mobile!

.idea/.idea.osu/.idea/runConfigurations/CatchRuleset__Tests_.xml

@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="CatchRuleset (Tests)" type="DotNetProject" factoryName=".NET Project" folderName="Ruleset">
-    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Game.Rulesets.Catch.Tests/bin/Debug/netcoreapp2.2/osu.Game.Rulesets.Catch.Tests.dll" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Game.Rulesets.Catch.Tests/bin/Debug/netcoreapp3.0/osu.Game.Rulesets.Catch.Tests.dll" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/osu.Game.Rulesets.Catch.Tests" />
     <option name="PASS_PARENT_ENVS" value="1" />
@@ -12,7 +12,7 @@
     <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
     <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
     <option name="PROJECT_KIND" value="DotNetCore" />
-    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v2.2" />
+    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v3.0" />
     <browser url="http://localhost:5000" />
     <method v="2">
       <option name="Build" enabled="true" />

.idea/.idea.osu/.idea/runConfigurations/ManiaRuleset__Tests_.xml

@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="ManiaRuleset (Tests)" type="DotNetProject" factoryName=".NET Project" folderName="Ruleset">
-    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Game.Rulesets.Mania.Tests/bin/Debug/netcoreapp2.2/osu.Game.Rulesets.Mania.Tests.dll" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Game.Rulesets.Mania.Tests/bin/Debug/netcoreapp3.0/osu.Game.Rulesets.Mania.Tests.dll" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/osu.Game.Rulesets.Mania.Tests" />
     <option name="PASS_PARENT_ENVS" value="1" />
@@ -12,7 +12,7 @@
     <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
     <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
     <option name="PROJECT_KIND" value="DotNetCore" />
-    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v2.2" />
+    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v3.0" />
     <browser url="http://localhost:5000" />
     <method v="2">
       <option name="Build" enabled="true" />

.idea/.idea.osu/.idea/runConfigurations/OsuRuleset__Tests_.xml

@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="OsuRuleset (Tests)" type="DotNetProject" factoryName=".NET Project" folderName="Ruleset">
-    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Game.Rulesets.Osu.Tests/bin/Debug/netcoreapp2.2/osu.Game.Rulesets.Osu.Tests.dll" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Game.Rulesets.Osu.Tests/bin/Debug/netcoreapp3.0/osu.Game.Rulesets.Osu.Tests.dll" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/osu.Game.Rulesets.Osu.Tests" />
     <option name="PASS_PARENT_ENVS" value="1" />
@@ -12,7 +12,7 @@
     <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
     <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
     <option name="PROJECT_KIND" value="DotNetCore" />
-    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v2.2" />
+    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v3.0" />
     <browser url="http://localhost:5000" />
     <method v="2">
       <option name="Build" enabled="true" />

.idea/.idea.osu/.idea/runConfigurations/TaikoRuleset__Tests_.xml

@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="TaikoRuleset (Tests)" type="DotNetProject" factoryName=".NET Project" folderName="Ruleset">
-    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Game.Rulesets.Taiko.Tests/bin/Debug/netcoreapp2.2/osu.Game.Rulesets.Taiko.Tests.dll" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Game.Rulesets.Taiko.Tests/bin/Debug/netcoreapp3.0/osu.Game.Rulesets.Taiko.Tests.dll" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/osu.Game.Rulesets.Taiko.Tests" />
     <option name="PASS_PARENT_ENVS" value="1" />
@@ -12,7 +12,7 @@
     <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
     <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
     <option name="PROJECT_KIND" value="DotNetCore" />
-    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v2.2" />
+    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v3.0" />
     <browser url="http://localhost:5000" />
     <method v="2">
       <option name="Build" enabled="true" />

.idea/.idea.osu/.idea/runConfigurations/Tournament.xml

@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Tournament" type="DotNetProject" factoryName=".NET Project" folderName="Tournament">
-    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Desktop/bin/Debug/netcoreapp2.2/osu!.dll" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Desktop/bin/Debug/netcoreapp3.0/osu!.dll" />
     <option name="PROGRAM_PARAMETERS" value="--tournament" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/osu.Desktop" />
     <option name="PASS_PARENT_ENVS" value="1" />
@@ -12,7 +12,7 @@
     <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
     <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
     <option name="PROJECT_KIND" value="DotNetCore" />
-    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v2.2" />
+    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v3.0" />
     <method v="2">
       <option name="Build" enabled="true" />
     </method>

.idea/.idea.osu/.idea/runConfigurations/osu_.xml

@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="osu!" type="DotNetProject" factoryName=".NET Project" folderName="osu!">
-    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Desktop/bin/Debug/netcoreapp2.2/osu!.dll" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Desktop/bin/Debug/netcoreapp3.0/osu!.dll" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/osu.Desktop" />
     <option name="PASS_PARENT_ENVS" value="1" />
@@ -12,7 +12,7 @@
     <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
     <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
     <option name="PROJECT_KIND" value="DotNetCore" />
-    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v2.2" />
+    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v3.0" />
     <method v="2">
       <option name="Build" enabled="true" />
     </method>

.idea/.idea.osu/.idea/runConfigurations/osu___Tests_.xml

@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="osu! (Tests)" type="DotNetProject" factoryName=".NET Project" folderName="osu!">
-    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Game.Tests/bin/Debug/netcoreapp2.2/osu.Game.Tests.dll" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Game.Tests/bin/Debug/netcoreapp3.0/osu.Game.Tests.dll" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/osu.Game.Tests" />
     <option name="PASS_PARENT_ENVS" value="1" />
@@ -12,7 +12,7 @@
     <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
     <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
     <option name="PROJECT_KIND" value="DotNetCore" />
-    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v2.2" />
+    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v3.0" />
     <method v="2">
       <option name="Build" enabled="true" />
     </method>

.vscode/launch.json

@@ -6,13 +6,13 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/osu.Desktop/bin/Debug/netcoreapp2.2/osu!.dll"
+                "${workspaceRoot}/osu.Desktop/bin/Debug/netcoreapp3.0/osu!.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build osu! (Debug)",
             "linux": {
                 "env": {
-                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Desktop/bin/Debug/netcoreapp2.2:${env:LD_LIBRARY_PATH}"
+                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Desktop/bin/Debug/netcoreapp3.0:${env:LD_LIBRARY_PATH}"
                 }
             },
             "console": "internalConsole"
@@ -23,13 +23,13 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/osu.Desktop/bin/Release/netcoreapp2.2/osu!.dll"
+                "${workspaceRoot}/osu.Desktop/bin/Release/netcoreapp3.0/osu!.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build osu! (Release)",
             "linux": {
                 "env": {
-                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Desktop/bin/Release/netcoreapp2.2:${env:LD_LIBRARY_PATH}"
+                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Desktop/bin/Release/netcoreapp3.0:${env:LD_LIBRARY_PATH}"
                 }
             },
             "console": "internalConsole"
@@ -40,13 +40,13 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/osu.Game.Tests/bin/Debug/netcoreapp2.2/osu.Game.Tests.dll"
+                "${workspaceRoot}/osu.Game.Tests/bin/Debug/netcoreapp3.0/osu.Game.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build tests (Debug)",
             "linux": {
                 "env": {
-                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Game.Tests/bin/Debug/netcoreapp2.2:${env:LD_LIBRARY_PATH}"
+                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Game.Tests/bin/Debug/netcoreapp3.0:${env:LD_LIBRARY_PATH}"
                 }
             },
             "console": "internalConsole"
@@ -56,13 +56,13 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/osu.Game.Tests/bin/Release/netcoreapp2.2/osu.Game.Tests.dll"
+                "${workspaceRoot}/osu.Game.Tests/bin/Release/netcoreapp3.0/osu.Game.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build tests (Release)",
             "linux": {
                 "env": {
-                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Game.Tests/bin/Release/netcoreapp2.2:${env:LD_LIBRARY_PATH}"
+                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Game.Tests/bin/Release/netcoreapp3.0:${env:LD_LIBRARY_PATH}"
                 }
             },
             "console": "internalConsole"
@@ -73,14 +73,14 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/osu.Desktop/bin/Debug/netcoreapp2.2/osu!.dll",
+                "${workspaceRoot}/osu.Desktop/bin/Debug/netcoreapp3.0/osu!.dll",
                 "--tournament"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build osu! (Debug)",
             "linux": {
                 "env": {
-                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Desktop/bin/Debug/netcoreapp2.2:${env:LD_LIBRARY_PATH}"
+                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Desktop/bin/Debug/netcoreapp3.0:${env:LD_LIBRARY_PATH}"
                 }
             },
             "console": "internalConsole"
@@ -91,14 +91,14 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/osu.Desktop/bin/Release/netcoreapp2.2/osu!.dll",
+                "${workspaceRoot}/osu.Desktop/bin/Release/netcoreapp3.0/osu!.dll",
                 "--tournament"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build osu! (Release)",
             "linux": {
                 "env": {
-                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Desktop/bin/Release/netcoreapp2.2:${env:LD_LIBRARY_PATH}"
+                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Desktop/bin/Release/netcoreapp3.0:${env:LD_LIBRARY_PATH}"
                 }
             },
             "console": "internalConsole"
@@ -109,14 +109,14 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/osu.Game.Tournament.Tests/bin/Debug/netcoreapp2.2/osu.Game.Tournament.Tests.dll",
+                "${workspaceRoot}/osu.Game.Tournament.Tests/bin/Debug/netcoreapp3.0/osu.Game.Tournament.Tests.dll",
                 "--tournament"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build tournament tests (Debug)",
             "linux": {
                 "env": {
-                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Game.Tournament.Tests/bin/Debug/netcoreapp2.2:${env:LD_LIBRARY_PATH}"
+                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Game.Tournament.Tests/bin/Debug/netcoreapp3.0:${env:LD_LIBRARY_PATH}"
                 }
             },
             "console": "internalConsole"
@@ -127,14 +127,14 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/osu.Game.Tournament.Tests/bin/Debug/netcoreapp2.2/osu.Game.Tournament.Tests.dll",
+                "${workspaceRoot}/osu.Game.Tournament.Tests/bin/Debug/netcoreapp3.0/osu.Game.Tournament.Tests.dll",
                 "--tournament"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build tournament tests (Release)",
             "linux": {
                 "env": {
-                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Game.Tournament.Tests/bin/Debug/netcoreapp2.2:${env:LD_LIBRARY_PATH}"
+                    "LD_LIBRARY_PATH": "${workspaceRoot}/osu.Game.Tournament.Tests/bin/Debug/netcoreapp3.0:${env:LD_LIBRARY_PATH}"
                 }
             },
             "console": "internalConsole"

.vscode/tasks.json

@@ -95,7 +95,7 @@
             "problemMatcher": "$msCompile"
         },
         {
-            "label": "Restore (netcoreapp2.2)",
+            "label": "Restore (netcoreapp3.0)",
             "type": "shell",
             "command": "dotnet",
             "args": [

Gemfile.lock

@@ -1,11 +1,11 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    CFPropertyList (3.0.0)
+    CFPropertyList (3.0.1)
-    addressable (2.6.0)
+    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 4.0)
+      public_suffix (>= 2.0.2, < 5.0)
     atomos (0.1.3)
-    babosa (1.0.2)
+    babosa (1.0.3)
     claide (1.0.3)
     colored (1.2)
     colored2 (3.1.2)
@@ -18,7 +18,7 @@ GEM
       unf (>= 0.0.5, < 1.0.0)
     dotenv (2.7.5)
     emoji_regex (1.0.1)
-    excon (0.66.0)
+    excon (0.67.0)
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     faraday-cookie_jar (0.0.6)
@@ -26,8 +26,8 @@ GEM
       http-cookie (~> 1.0.0)
     faraday_middleware (0.13.1)
       faraday (>= 0.7.4, < 1.0)
-    fastimage (2.1.5)
+    fastimage (2.1.7)
-    fastlane (2.129.0)
+    fastlane (2.133.0)
       CFPropertyList (>= 2.3, < 4.0.0)
       addressable (>= 2.3, < 3.0.0)
       babosa (>= 1.0.2, < 2.0.0)
@@ -37,9 +37,9 @@ GEM
       dotenv (>= 2.1.1, < 3.0.0)
       emoji_regex (>= 0.1, < 2.0)
       excon (>= 0.45.0, < 1.0.0)
-      faraday (~> 0.9)
+      faraday (< 0.16.0)
       faraday-cookie_jar (~> 0.0.6)
-      faraday_middleware (~> 0.9)
+      faraday_middleware (< 0.16.0)
       fastimage (>= 2.1.0, < 3.0.0)
       gh_inspector (>= 1.1.2, < 2.0.0)
       google-api-client (>= 0.21.2, < 0.24.0)
@@ -52,7 +52,7 @@ GEM
       multipart-post (~> 2.0.0)
       plist (>= 3.1.0, < 4.0.0)
       public_suffix (~> 2.0.0)
-      rubyzip (>= 1.2.2, < 2.0.0)
+      rubyzip (>= 1.3.0, < 2.0.0)
       security (= 0.1.3)
       simctl (~> 1.6.3)
       slack-notifier (>= 2.0.0, < 3.0.0)
@@ -77,9 +77,9 @@ GEM
       representable (~> 3.0)
       retriable (>= 2.0, < 4.0)
       signet (~> 0.9)
-    google-cloud-core (1.3.0)
+    google-cloud-core (1.3.1)
       google-cloud-env (~> 1.0)
-    google-cloud-env (1.2.0)
+    google-cloud-env (1.2.1)
       faraday (~> 0.11)
     google-cloud-storage (1.16.0)
       digest-crc (~> 0.4)
@@ -100,9 +100,9 @@ GEM
     json (2.2.0)
     jwt (2.1.0)
     memoist (0.16.0)
-    mime-types (3.2.2)
+    mime-types (3.3)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2019.0331)
+    mime-types-data (3.2019.1009)
     mini_magick (4.9.5)
     mini_portile2 (2.4.0)
     multi_json (1.13.1)
@@ -121,14 +121,14 @@ GEM
       uber (< 0.2.0)
     retriable (3.1.2)
     rouge (2.0.7)
-    rubyzip (1.2.3)
+    rubyzip (1.3.0)
     security (0.1.3)
-    signet (0.11.0)
+    signet (0.12.0)
       addressable (~> 2.3)
       faraday (~> 0.9)
       jwt (>= 1.5, < 3.0)
       multi_json (~> 1.10)
-    simctl (1.6.5)
+    simctl (1.6.6)
       CFPropertyList
       naturally
     slack-notifier (2.3.2)

README.md

@@ -18,7 +18,7 @@ Detailed changelogs are published on the [official osu! site](https://osu.ppy.sh
 
 ## Requirements
 
-- A desktop platform with the [.NET Core SDK 2.2](https://www.microsoft.com/net/learn/get-started) or higher installed.
+- A desktop platform with the [.NET Core SDK 3.0](https://www.microsoft.com/net/learn/get-started) or higher installed.
 - When running on linux, please have a system-wide ffmpeg installation available to support video decoding.
 - When running on Windows 7 or 8.1, **[additional prerequisites](https://docs.microsoft.com/en-us/dotnet/core/windows-prerequisites?tabs=netcore2x)** may be required to correctly run .NET Core applications if your operating system is not up-to-date with the latest service packs.
 - When working with the codebase, we recommend using an IDE with intellisense and syntax highlighting, such as [Visual Studio 2017+](https://visualstudio.microsoft.com/vs/), [Jetbrains Rider](https://www.jetbrains.com/rider/) or [Visual Studio Code](https://code.visualstudio.com/).
@@ -31,12 +31,10 @@ If you are not interested in developing the game, you can still consume our [bin
 
 **Latest build:**
 
-| [Windows (x64)](https://github.com/ppy/osu/releases/latest/download/install.exe)  | [macOS 10.12+](https://github.com/ppy/osu/releases/latest/download/osu.app.zip) |
+| [Windows (x64)](https://github.com/ppy/osu/releases/latest/download/install.exe)  | [macOS 10.12+](https://github.com/ppy/osu/releases/latest/download/osu.app.zip) | [iOS(iOS 10+)](https://testflight.apple.com/join/2tLcjWlF) | [Android (5+)](https://github.com/ppy/osu/releases/latest/download/sh.ppy.osulazer.apk)
-| ------------- | ------------- |
+| ------------- | ------------- | ------------- | ------------- |
 
 - **Linux** users are recommended to self-compile until we have official deployment in place.
-- **iOS** users can join the [TestFlight beta program](https://testflight.apple.com/join/2tLcjWlF) (note that due to high demand this is regularly full).
-- **Android** users can self-compile, and expect a public beta soon.
 
 If your platform is not listed above, there is still a chance you can manually build it by following the instructions below.
 
@@ -80,7 +78,7 @@ On Linux, the environment variable `LD_LIBRARY_PATH` must point to the build dir
 For example, you can run osu! with the following command:
 
 ```shell
-LD_LIBRARY_PATH="$(pwd)/osu.Desktop/bin/Debug/netcoreapp2.2" dotnet run --project osu.Desktop
+LD_LIBRARY_PATH="$(pwd)/osu.Desktop/bin/Debug/netcoreapp3.0" dotnet run --project osu.Desktop
 ```
 
 ### Testing with resource/framework modifications

appveyor.yml

@@ -1,6 +1,6 @@
 clone_depth: 1
 version: '{branch}-{build}'
-image: Previous Visual Studio 2017
+image: Visual Studio 2019 Preview
 test: off
 build_script:
   - cmd: PowerShell -Version 2.0 .\build.ps1

appveyor_deploy.yml

@@ -1,6 +1,6 @@
 clone_depth: 1
 version: '{build}'
-image: Previous Visual Studio 2017
+image: Visual Studio 2019 Preview
 test: off
 skip_non_tags: true
 build_script:

build.ps1

@@ -1,39 +1,5 @@
-##########################################################################
-# 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]$Configuration,
     [ValidateSet("Quiet", "Minimal", "Normal", "Verbose", "Diagnostic")]
@@ -45,27 +11,8 @@ Param(
     [string[]]$ScriptArgs
 )
 
-Write-Host "Preparing to run build script..."
-
-# Determine the script root for resolving other paths.
-if(!$PSScriptRoot) {
-    $PSScriptRoot = Split-Path $MyInvocation.MyCommand.Path -Parent
-}
-
-# Resolve the paths for resources used for debugging.
-$BUILD_DIR = Join-Path $PSScriptRoot "build"
-$TOOLS_DIR = Join-Path $BUILD_DIR "tools"
-$CAKE_CSPROJ = Join-Path $BUILD_DIR "cakebuild.csproj"
-
-# Install the required tools locally.
-Write-Host "Restoring cake tools..."
-Invoke-Expression "dotnet restore `"$CAKE_CSPROJ`" --packages `"$TOOLS_DIR`"" | Out-Null
-
-# Find the Cake executable
-$CAKE_EXECUTABLE = (Get-ChildItem -Path "$TOOLS_DIR/cake.coreclr/" -Filter Cake.dll -Recurse).FullName
-
 # Build Cake arguments
-$cakeArguments = @("$Script");
+$cakeArguments = "";
 if ($Target) { $cakeArguments += "-target=$Target" }
 if ($Configuration) { $cakeArguments += "-configuration=$Configuration" }
 if ($Verbosity) { $cakeArguments += "-verbosity=$Verbosity" }
@@ -74,9 +21,7 @@ if ($DryRun) { $cakeArguments += "-dryrun" }
 if ($Experimental) { $cakeArguments += "-experimental" }
 $cakeArguments += $ScriptArgs
 
-# Start Cake
+dotnet tool install Cake.Tool --global --version 0.35.0
-Write-Host "Running build script..."
+dotnet cake ./build/build.cake --bootstrap
-Push-Location -Path $BUILD_DIR
+dotnet cake ./build/build.cake $cakeArguments
-Invoke-Expression "dotnet `"$CAKE_EXECUTABLE`" $cakeArguments"
-Pop-Location
 exit $LASTEXITCODE

build.sh

@@ -1,18 +1,5 @@
-#!/usr/bin/env bash
+echo "Installing Cake.Tool..."
-
+dotnet tool install Cake.Tool --global --version 0.35.0
-##########################################################################
-# This is a customized Cake bootstrapper script for Shell.
-##########################################################################
-
-echo "Preparing to run build script..."
-
-cd build
-SCRIPT_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
-TOOLS_DIR=$SCRIPT_DIR/tools
-CAKE_BINARY_PATH=$TOOLS_DIR/"cake.coreclr"
-
-SCRIPT="build.cake"
-CAKE_CSPROJ=$SCRIPT_DIR/"cakebuild.csproj"
 
 # Parse arguments.
 CAKE_ARGUMENTS=()
@@ -25,14 +12,6 @@ for i in "$@"; do
     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 $CAKE_BINARY_PATH -name "Cake.dll")
-
-# Start Cake
 echo "Running build script..."
-
+dotnet cake ./build/build.cake --bootstrap
-dotnet "$CAKE_BINARY" $SCRIPT "${CAKE_ARGUMENTS[@]}"
+dotnet cake ./build/build.cake "${CAKE_ARGUMENTS[@]}"

build/build.cake

@@ -1,5 +1,5 @@
-#addin "nuget:?package=CodeFileSanity&version=0.0.21"
+#addin "nuget:?package=CodeFileSanity&version=0.0.33"
-#addin "nuget:?package=JetBrains.ReSharper.CommandLineTools&version=2019.1.1"
+#addin "nuget:?package=JetBrains.ReSharper.CommandLineTools&version=2019.2.1"
 #tool "nuget:?package=NVika.MSBuild&version=1.0.1"
 var nVikaToolPath = GetFiles("./tools/NVika.MSBuild.*/tools/NVika.exe").First();
 

build/cakebuild.csproj

@@ -1,11 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <PackAsTool>true</PackAsTool>
-    <TargetFrameworks>netcoreapp2.0</TargetFrameworks>
-  </PropertyGroup>
-  <ItemGroup>
-    <PackageReference Include="Cake" Version="0.34.1" />
-    <PackageReference Include="Cake.CoreCLR" Version="0.34.1" />
-  </ItemGroup>
-</Project>

fastlane/Fastfile

@@ -1,5 +1,83 @@
 update_fastlane
 
+platform :android do
+desc 'Deploy to play store'
+  lane :beta do |options|
+
+    update_version(
+      version: options[:version],
+      build: options[:build],
+    )
+
+    build(options)
+
+    supply(
+      apk: './osu.Android/bin/Release/sh.ppy.osulazer-Signed.apk',
+      package_name: 'sh.ppy.osulazer',
+      track: 'alpha', # upload to alpha, we can promote it later
+      json_key: options[:json_key],
+    )
+  end
+
+  desc 'Deploy to github release'
+  lane :build_github do |options|
+
+    update_version(
+      version: options[:version],
+      build: options[:build],
+    )
+
+    build(options)
+
+    client = HTTPClient.new
+    changelog = client.get_content 'https://gist.githubusercontent.com/peppy/aaa2ec1a323554b619671cac6dbbb776/raw'
+    changelog.gsub!('$BUILD_ID', options[:build])
+
+    set_github_release(
+      repository_name: "ppy/osu",
+      api_token: ENV["GITHUB_TOKEN"],
+      name: options[:build],
+      tag_name: options[:build],
+      is_draft: true,
+      description: changelog,
+      commitish: "master",
+      upload_assets: ["osu.Android/bin/Release/sh.ppy.osulazer.apk"]
+    )
+
+  end
+
+  desc 'Compile the project'
+  lane :build do |options|
+    nuget_restore(
+      project_path: 'osu.Android.sln'
+    )
+
+    souyuz(
+      build_configuration: 'Release',
+      solution_path: 'osu.Android.sln',
+      platform: "android",
+      output_path: "osu.Android/bin/Release/",
+      keystore_path: options[:keystore_path],
+      keystore_alias: options[:keystore_alias],
+      keystore_password: ENV["KEYSTORE_PASSWORD"]
+    )
+  end
+
+  lane :update_version do |options|
+
+    split = options[:build].split('.')
+    split[1] = split[1].to_s.rjust(4, '0')
+    android_build = split.join('')
+
+    app_version(
+      solution_path: 'osu.Android.sln',
+      version: options[:version],
+      build: android_build,
+    )
+  end
+
+end
+
 platform :ios do
   desc 'Deploy to testflight'
   lane :beta do |options|

fastlane/README.md

@@ -15,6 +15,30 @@ Install _fastlane_ using
 or alternatively using `brew cask install fastlane`
 
 # Available Actions
+## Android
+### android beta
+```
+fastlane android beta
+```
+Deploy to play store
+### android build_github
+```
+fastlane android build_github
+```
+Deploy to github release
+### android build
+```
+fastlane android build
+```
+Compile the project
+### android update_version
+```
+fastlane android update_version
+```
+
+
+----
+
 ## iOS
 ### ios beta
 ```

osu.Android.props

@@ -51,7 +51,6 @@
     <None Include="$(MSBuildThisFileDirectory)\osu.licenseheader">
       <Link>osu.licenseheader</Link>
     </None>
-    <AndroidNativeLibrary Include="$(OutputPath)\**\*.so" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="System" />
@@ -62,7 +61,7 @@
     <Reference Include="Java.Interop" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Game.Resources" Version="2019.913.0" />
+    <PackageReference Include="ppy.osu.Game.Resources" Version="2019.1010.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2019.911.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2019.1029.0" />
   </ItemGroup>
 </Project>

osu.Android/OsuGameActivity.cs

@@ -16,6 +16,11 @@ namespace osu.Android
 
         protected override void OnCreate(Bundle savedInstanceState)
         {
+            // The default current directory on android is '/'.
+            // On some devices '/' maps to the app data directory. On others it maps to the root of the internal storage.
+            // In order to have a consistent current directory on all devices the full path of the app data directory is set as the current directory.
+            System.Environment.CurrentDirectory = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
+
             base.OnCreate(savedInstanceState);
 
             Window.AddFlags(WindowManagerFlags.Fullscreen);

osu.Android/OsuGameAndroid.cs

@@ -4,11 +4,37 @@
 using System;
 using Android.App;
 using osu.Game;
+using osu.Game.Updater;
 
 namespace osu.Android
 {
     public class OsuGameAndroid : OsuGame
     {
-        public override Version AssemblyVersion => new Version(Application.Context.ApplicationContext.PackageManager.GetPackageInfo(Application.Context.ApplicationContext.PackageName, 0).VersionName);
+        public override Version AssemblyVersion
+        {
+            get
+            {
+                var packageInfo = Application.Context.ApplicationContext.PackageManager.GetPackageInfo(Application.Context.ApplicationContext.PackageName, 0);
+
+                try
+                {
+                    string versionName = packageInfo.VersionCode.ToString();
+                    // undo play store version garbling
+                    return new Version(int.Parse(versionName.Substring(0, 4)), int.Parse(versionName.Substring(4, 4)), int.Parse(versionName.Substring(8, 1)));
+                }
+                catch
+                {
+                }
+
+                return new Version(packageInfo.VersionName);
+            }
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            Add(new SimpleUpdateManager());
+        }
     }
 }

osu.Desktop/OsuGameDesktop.cs

@@ -17,6 +17,7 @@ using osu.Framework.Logging;
 using osu.Framework.Platform.Windows;
 using osu.Framework.Screens;
 using osu.Game.Screens.Menu;
+using osu.Game.Updater;
 
 namespace osu.Desktop
 {

osu.Desktop/Overlays/VersionManager.cs

@@ -8,29 +8,18 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.Textures;
 using osu.Game;
-using osu.Game.Configuration;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
-using osu.Game.Overlays;
-using osu.Game.Overlays.Notifications;
 using osuTK;
 using osuTK.Graphics;
 
 namespace osu.Desktop.Overlays
 {
-    public class VersionManager : OverlayContainer
+    public class VersionManager : VisibilityContainer
     {
-        private OsuConfigManager config;
-        private OsuGameBase game;
-        private NotificationOverlay notificationOverlay;
-
         [BackgroundDependencyLoader]
-        private void load(NotificationOverlay notification, OsuColour colours, TextureStore textures, OsuGameBase game, OsuConfigManager config)
+        private void load(OsuColour colours, TextureStore textures, OsuGameBase game)
         {
-            notificationOverlay = notification;
-            this.config = config;
-            this.game = game;
-
             AutoSizeAxes = Axes.Both;
             Anchor = Anchor.BottomCentre;
             Origin = Anchor.BottomCentre;
@@ -85,48 +74,6 @@ namespace osu.Desktop.Overlays
             };
         }
 
-        protected override void LoadComplete()
-        {
-            base.LoadComplete();
-
-            var version = game.Version;
-            var lastVersion = config.Get<string>(OsuSetting.Version);
-
-            if (game.IsDeployedBuild && version != lastVersion)
-            {
-                config.Set(OsuSetting.Version, version);
-
-                // only show a notification if we've previously saved a version to the config file (ie. not the first run).
-                if (!string.IsNullOrEmpty(lastVersion))
-                    notificationOverlay.Post(new UpdateCompleteNotification(version));
-            }
-        }
-
-        private class UpdateCompleteNotification : SimpleNotification
-        {
-            private readonly string version;
-
-            public UpdateCompleteNotification(string version)
-            {
-                this.version = version;
-                Text = $"You are now running osu!lazer {version}.\nClick to see what's new!";
-            }
-
-            [BackgroundDependencyLoader]
-            private void load(OsuColour colours, ChangelogOverlay changelog, NotificationOverlay notificationOverlay)
-            {
-                Icon = FontAwesome.Solid.CheckSquare;
-                IconBackgound.Colour = colours.BlueDark;
-
-                Activated = delegate
-                {
-                    notificationOverlay.Hide();
-                    changelog.ShowBuild(OsuGameBase.CLIENT_STREAM_NAME, version);
-                    return true;
-                };
-            }
-        }
-
         protected override void PopIn()
         {
             this.FadeIn(1400, Easing.OutQuint);

osu.Desktop/Updater/SquirrelUpdateManager.cs

@@ -20,7 +20,7 @@ using LogLevel = Splat.LogLevel;
 
 namespace osu.Desktop.Updater
 {
-    public class SquirrelUpdateManager : Component
+    public class SquirrelUpdateManager : osu.Game.Updater.UpdateManager
     {
         private UpdateManager updateManager;
         private NotificationOverlay notificationOverlay;

osu.Desktop/osu.Desktop.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="..\osu.Game.props" />
   <PropertyGroup Label="Project">
-    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <OutputType>WinExe</OutputType>
     <PlatformTarget>AnyCPU</PlatformTarget>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
@@ -23,10 +23,10 @@
     <ProjectReference Include="..\osu.Game.Rulesets.Catch\osu.Game.Rulesets.Catch.csproj" />
     <ProjectReference Include="..\osu.Game.Rulesets.Mania\osu.Game.Rulesets.Mania.csproj" />
     <ProjectReference Include="..\osu.Game.Rulesets.Taiko\osu.Game.Rulesets.Taiko.csproj" />
-    <PackageReference Include="Microsoft.Win32.Registry" Version="4.5.0" />
+    <PackageReference Include="Microsoft.Win32.Registry" Version="4.6.0" />
   </ItemGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="System.IO.Packaging" Version="4.5.0" />
+    <PackageReference Include="System.IO.Packaging" Version="4.6.0" />
     <PackageReference Include="ppy.squirrel.windows" Version="1.9.0.4" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.2.6" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.2.6" />

osu.Game.Rulesets.Catch.Tests/.vscode/launch.json

@@ -7,7 +7,7 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/bin/Debug/netcoreapp2.2/osu.Game.Rulesets.Catch.Tests.dll"
+                "${workspaceRoot}/bin/Debug/netcoreapp3.0/osu.Game.Rulesets.Catch.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build (Debug)",
@@ -20,7 +20,7 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/bin/Release/netcoreapp2.2/osu.Game.Rulesets.Catch.Tests.dll"
+                "${workspaceRoot}/bin/Release/netcoreapp3.0/osu.Game.Rulesets.Catch.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build (Release)",

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

@@ -38,7 +38,7 @@ namespace osu.Game.Rulesets.Catch.Tests
         private void load()
         {
             var controlPointInfo = new ControlPointInfo();
-            controlPointInfo.TimingPoints.Add(new TimingControlPoint());
+            controlPointInfo.Add(0, new TimingControlPoint());
 
             WorkingBeatmap beatmap = CreateWorkingBeatmap(new Beatmap
             {

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

@@ -2,14 +2,14 @@
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup Label="Project References">
     <ProjectReference Include="..\osu.Game.Rulesets.Catch\osu.Game.Rulesets.Catch.csproj" />

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

@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using osu.Framework.Bindables;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets.Catch.Beatmaps;
@@ -37,9 +38,21 @@ namespace osu.Game.Rulesets.Catch.Objects
 
         public int ComboOffset { get; set; }
 
-        public int IndexInCurrentCombo { get; set; }
+        public Bindable<int> IndexInCurrentComboBindable { get; } = new Bindable<int>();
 
-        public int ComboIndex { get; set; }
+        public int IndexInCurrentCombo
+        {
+            get => IndexInCurrentComboBindable.Value;
+            set => IndexInCurrentComboBindable.Value = value;
+        }
+
+        public Bindable<int> ComboIndexBindable { get; } = new Bindable<int>();
+
+        public int ComboIndex
+        {
+            get => ComboIndexBindable.Value;
+            set => ComboIndexBindable.Value = value;
+        }
 
         /// <summary>
         /// Difference between the distance to the next object
@@ -48,10 +61,16 @@ namespace osu.Game.Rulesets.Catch.Objects
         /// </summary>
         public float DistanceToHyperDash { get; set; }
 
+        public Bindable<bool> LastInComboBindable { get; } = new Bindable<bool>();
+
         /// <summary>
         /// The next fruit starts a new combo. Used for explodey.
         /// </summary>
-        public virtual bool LastInCombo { get; set; }
+        public virtual bool LastInCombo
+        {
+            get => LastInComboBindable.Value;
+            set => LastInComboBindable.Value = value;
+        }
 
         public float Scale { get; set; } = 1;
 
@@ -74,7 +93,7 @@ namespace osu.Game.Rulesets.Catch.Objects
             Scale = 1.0f - 0.7f * (difficulty.CircleSize - 5) / 5;
         }
 
-        protected override HitWindows CreateHitWindows() => null;
+        protected override HitWindows CreateHitWindows() => HitWindows.Empty;
     }
 
     public enum FruitVisualRepresentation

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

@@ -2,35 +2,50 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
-using System.Linq;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 
 namespace osu.Game.Rulesets.Catch.Objects.Drawable
 {
     public class DrawableBananaShower : DrawableCatchHitObject<BananaShower>
     {
+        private readonly Func<CatchHitObject, DrawableHitObject<CatchHitObject>> createDrawableRepresentation;
         private readonly Container bananaContainer;
 
         public DrawableBananaShower(BananaShower s, Func<CatchHitObject, DrawableHitObject<CatchHitObject>> createDrawableRepresentation = null)
             : base(s)
         {
+            this.createDrawableRepresentation = createDrawableRepresentation;
             RelativeSizeAxes = Axes.X;
             Origin = Anchor.BottomLeft;
             X = 0;
 
             AddInternal(bananaContainer = new Container { RelativeSizeAxes = Axes.Both });
-
-            foreach (var b in s.NestedHitObjects.Cast<Banana>())
-                AddNested(createDrawableRepresentation?.Invoke(b));
         }
 
-        protected override void AddNested(DrawableHitObject h)
+        protected override void AddNestedHitObject(DrawableHitObject hitObject)
         {
-            ((DrawableCatchHitObject)h).CheckPosition = o => CheckPosition?.Invoke(o) ?? false;
+            base.AddNestedHitObject(hitObject);
-            bananaContainer.Add(h);
+            bananaContainer.Add(hitObject);
-            base.AddNested(h);
+        }
+
+        protected override void ClearNestedHitObjects()
+        {
+            base.ClearNestedHitObjects();
+            bananaContainer.Clear();
+        }
+
+        protected override DrawableHitObject CreateNestedHitObject(HitObject hitObject)
+        {
+            switch (hitObject)
+            {
+                case Banana banana:
+                    return createDrawableRepresentation?.Invoke(banana)?.With(o => ((DrawableCatchHitObject)o).CheckPosition = p => CheckPosition?.Invoke(p) ?? false);
+            }
+
+            return base.CreateNestedHitObject(hitObject);
         }
     }
 }

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

@@ -2,38 +2,50 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
-using System.Linq;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 
 namespace osu.Game.Rulesets.Catch.Objects.Drawable
 {
     public class DrawableJuiceStream : DrawableCatchHitObject<JuiceStream>
     {
+        private readonly Func<CatchHitObject, DrawableHitObject<CatchHitObject>> createDrawableRepresentation;
         private readonly Container dropletContainer;
 
         public DrawableJuiceStream(JuiceStream s, Func<CatchHitObject, DrawableHitObject<CatchHitObject>> createDrawableRepresentation = null)
             : base(s)
         {
+            this.createDrawableRepresentation = createDrawableRepresentation;
             RelativeSizeAxes = Axes.Both;
             Origin = Anchor.BottomLeft;
             X = 0;
 
             AddInternal(dropletContainer = new Container { RelativeSizeAxes = Axes.Both, });
-
-            foreach (var o in s.NestedHitObjects.Cast<CatchHitObject>())
-                AddNested(createDrawableRepresentation?.Invoke(o));
         }
 
-        protected override void AddNested(DrawableHitObject h)
+        protected override void AddNestedHitObject(DrawableHitObject hitObject)
         {
-            var catchObject = (DrawableCatchHitObject)h;
+            base.AddNestedHitObject(hitObject);
+            dropletContainer.Add(hitObject);
+        }
 
-            catchObject.CheckPosition = o => CheckPosition?.Invoke(o) ?? false;
+        protected override void ClearNestedHitObjects()
+        {
+            base.ClearNestedHitObjects();
+            dropletContainer.Clear();
+        }
 
-            dropletContainer.Add(h);
+        protected override DrawableHitObject CreateNestedHitObject(HitObject hitObject)
-            base.AddNested(h);
+        {
+            switch (hitObject)
+            {
+                case CatchHitObject catchObject:
+                    return createDrawableRepresentation?.Invoke(catchObject)?.With(o => ((DrawableCatchHitObject)o).CheckPosition = p => CheckPosition?.Invoke(p) ?? false);
+            }
+
+            return base.CreateNestedHitObject(hitObject);
         }
     }
 }

osu.Game.Rulesets.Catch/Replays/CatchAutoGenerator.cs

@@ -37,9 +37,6 @@ namespace osu.Game.Rulesets.Catch.Replays
             float lastPosition = 0.5f;
             double lastTime = 0;
 
-            // Todo: Realistically this shouldn't be needed, but the first frame is skipped with the way replays are currently handled
-            addFrame(-100000, lastPosition);
-
             void moveToNext(CatchHitObject h)
             {
                 float positionChange = Math.Abs(lastPosition - h.X);
@@ -127,6 +124,10 @@ namespace osu.Game.Rulesets.Catch.Replays
 
         private void addFrame(double time, float? position = null, bool dashing = false)
         {
+            // todo: can be removed once FramedReplayInputHandler correctly handles rewinding before first frame.
+            if (Replay.Frames.Count == 0)
+                Replay.Frames.Add(new CatchReplayFrame(time - 1, position, false, null));
+
             var last = currentFrame;
             currentFrame = new CatchReplayFrame(time, position, dashing, last);
             Replay.Frames.Add(currentFrame);

osu.Game.Rulesets.Mania.Tests/.vscode/launch.json

@@ -7,7 +7,7 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/bin/Debug/netcoreapp2.2/osu.Game.Rulesets.Mania.Tests.dll"
+                "${workspaceRoot}/bin/Debug/netcoreapp3.0/osu.Game.Rulesets.Mania.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build (Debug)",
@@ -20,7 +20,7 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/bin/Release/netcoreapp2.2/osu.Game.Rulesets.Mania.Tests.dll"
+                "${workspaceRoot}/bin/Release/netcoreapp3.0/osu.Game.Rulesets.Mania.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build (Release)",

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

@@ -27,8 +27,13 @@ namespace osu.Game.Rulesets.Mania.Tests
         [Cached(typeof(IReadOnlyList<Mod>))]
         private IReadOnlyList<Mod> mods { get; set; } = Array.Empty<Mod>();
 
+        [Cached(typeof(IScrollingInfo))]
+        private IScrollingInfo scrollingInfo;
+
         protected ManiaPlacementBlueprintTestScene()
         {
+            scrollingInfo = ((ScrollingTestContainer)HitObjectContainer).ScrollingInfo;
+
             Add(column = new Column(0)
             {
                 Anchor = Anchor.Centre,
@@ -36,15 +41,8 @@ namespace osu.Game.Rulesets.Mania.Tests
                 AccentColour = Color4.OrangeRed,
                 Clock = new FramedClock(new StopwatchClock()), // No scroll
             });
-        }
 
-        protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
+            AddStep("change direction", () => ((ScrollingTestContainer)HitObjectContainer).Flip());
-        {
-            var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
-
-            dependencies.CacheAs(((ScrollingTestContainer)HitObjectContainer).ScrollingInfo);
-
-            return dependencies;
         }
 
         protected override Container CreateHitObjectContainer() => new ScrollingTestContainer(ScrollingDirection.Down) { RelativeSizeAxes = Axes.Both };

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

@@ -16,6 +16,11 @@ namespace osu.Game.Rulesets.Mania.Tests
     [HeadlessTest]
     public class TestSceneAutoGeneration : OsuTestScene
     {
+        /// <summary>
+        /// The number of frames which are generated at the start of a replay regardless of hitobject content.
+        /// </summary>
+        private const int frame_offset = 1;
+
         [Test]
         public void TestSingleNote()
         {
@@ -28,11 +33,11 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == 3, "Replay must have 3 frames");
+            Assert.IsTrue(generated.Frames.Count == frame_offset + 2, "Replay must have 3 frames");
-            Assert.AreEqual(1000, generated.Frames[1].Time, "Incorrect hit time");
+            Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect hit time");
-            Assert.AreEqual(1000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[2].Time, "Incorrect release time");
+            Assert.AreEqual(1000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 1].Time, "Incorrect release time");
-            Assert.IsTrue(checkContains(generated.Frames[1], ManiaAction.Special1), "Special1 has not been pressed");
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset], ManiaAction.Special1), "Special1 has not been pressed");
-            Assert.IsFalse(checkContains(generated.Frames[2], ManiaAction.Special1), "Special1 has not been released");
+            Assert.IsFalse(checkContains(generated.Frames[frame_offset + 1], ManiaAction.Special1), "Special1 has not been released");
         }
 
         [Test]
@@ -49,11 +54,11 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == 3, "Replay must have 3 frames");
+            Assert.IsTrue(generated.Frames.Count == frame_offset + 2, "Replay must have 3 frames");
-            Assert.AreEqual(1000, generated.Frames[1].Time, "Incorrect hit time");
+            Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect hit time");
-            Assert.AreEqual(3000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[2].Time, "Incorrect release time");
+            Assert.AreEqual(3000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 1].Time, "Incorrect release time");
-            Assert.IsTrue(checkContains(generated.Frames[1], ManiaAction.Special1), "Special1 has not been pressed");
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset], ManiaAction.Special1), "Special1 has not been pressed");
-            Assert.IsFalse(checkContains(generated.Frames[2], ManiaAction.Special1), "Special1 has not been released");
+            Assert.IsFalse(checkContains(generated.Frames[frame_offset + 1], ManiaAction.Special1), "Special1 has not been released");
         }
 
         [Test]
@@ -69,11 +74,11 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == 3, "Replay must have 3 frames");
+            Assert.IsTrue(generated.Frames.Count == frame_offset + 2, "Replay must have 3 frames");
-            Assert.AreEqual(1000, generated.Frames[1].Time, "Incorrect hit time");
+            Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect hit time");
-            Assert.AreEqual(1000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[2].Time, "Incorrect release time");
+            Assert.AreEqual(1000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 1].Time, "Incorrect release time");
-            Assert.IsTrue(checkContains(generated.Frames[1], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been pressed");
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been pressed");
-            Assert.IsFalse(checkContains(generated.Frames[2], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been released");
+            Assert.IsFalse(checkContains(generated.Frames[frame_offset + 1], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been released");
         }
 
         [Test]
@@ -91,11 +96,13 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == 3, "Replay must have 3 frames");
+            Assert.IsTrue(generated.Frames.Count == frame_offset + 2, "Replay must have 3 frames");
-            Assert.AreEqual(1000, generated.Frames[1].Time, "Incorrect hit time");
+
-            Assert.AreEqual(3000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[2].Time, "Incorrect release time");
+            Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect hit time");
-            Assert.IsTrue(checkContains(generated.Frames[1], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been pressed");
+            Assert.AreEqual(3000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 1].Time, "Incorrect release time");
-            Assert.IsFalse(checkContains(generated.Frames[2], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been released");
+
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been pressed");
+            Assert.IsFalse(checkContains(generated.Frames[frame_offset + 1], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been released");
         }
 
         [Test]
@@ -112,15 +119,15 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == 5, "Replay must have 5 frames");
+            Assert.IsTrue(generated.Frames.Count == frame_offset + 4, "Replay must have 4 generated frames");
-            Assert.AreEqual(1000, generated.Frames[1].Time, "Incorrect first note hit time");
+            Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect first note hit time");
-            Assert.AreEqual(1000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[2].Time, "Incorrect first note release time");
+            Assert.AreEqual(1000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 1].Time, "Incorrect first note release time");
-            Assert.AreEqual(2000, generated.Frames[3].Time, "Incorrect second note hit time");
+            Assert.AreEqual(2000, generated.Frames[frame_offset + 2].Time, "Incorrect second note hit time");
-            Assert.AreEqual(2000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[4].Time, "Incorrect second note release time");
+            Assert.AreEqual(2000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 3].Time, "Incorrect second note release time");
-            Assert.IsTrue(checkContains(generated.Frames[1], ManiaAction.Key1), "Key1 has not been pressed");
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset], ManiaAction.Key1), "Key1 has not been pressed");
-            Assert.IsFalse(checkContains(generated.Frames[2], ManiaAction.Key1), "Key1 has not been released");
+            Assert.IsFalse(checkContains(generated.Frames[frame_offset + 1], ManiaAction.Key1), "Key1 has not been released");
-            Assert.IsTrue(checkContains(generated.Frames[3], ManiaAction.Key2), "Key2 has not been pressed");
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset + 2], ManiaAction.Key2), "Key2 has not been pressed");
-            Assert.IsFalse(checkContains(generated.Frames[4], ManiaAction.Key2), "Key2 has not been released");
+            Assert.IsFalse(checkContains(generated.Frames[frame_offset + 3], ManiaAction.Key2), "Key2 has not been released");
         }
 
         [Test]
@@ -139,16 +146,16 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == 5, "Replay must have 5 frames");
+            Assert.IsTrue(generated.Frames.Count == frame_offset + 4, "Replay must have 4 generated frames");
-            Assert.AreEqual(1000, generated.Frames[1].Time, "Incorrect first note hit time");
+            Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect first note hit time");
-            Assert.AreEqual(3000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[3].Time, "Incorrect first note release time");
+            Assert.AreEqual(3000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 2].Time, "Incorrect first note release time");
-            Assert.AreEqual(2000, generated.Frames[2].Time, "Incorrect second note hit time");
+            Assert.AreEqual(2000, generated.Frames[frame_offset + 1].Time, "Incorrect second note hit time");
-            Assert.AreEqual(4000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[4].Time, "Incorrect second note release time");
+            Assert.AreEqual(4000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 3].Time, "Incorrect second note release time");
-            Assert.IsTrue(checkContains(generated.Frames[1], ManiaAction.Key1), "Key1 has not been pressed");
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset], ManiaAction.Key1), "Key1 has not been pressed");
-            Assert.IsTrue(checkContains(generated.Frames[2], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been pressed");
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset + 1], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been pressed");
-            Assert.IsFalse(checkContains(generated.Frames[3], ManiaAction.Key1), "Key1 has not been released");
+            Assert.IsFalse(checkContains(generated.Frames[frame_offset + 2], ManiaAction.Key1), "Key1 has not been released");
-            Assert.IsTrue(checkContains(generated.Frames[3], ManiaAction.Key2), "Key2 has been released");
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset + 2], ManiaAction.Key2), "Key2 has been released");
-            Assert.IsFalse(checkContains(generated.Frames[4], ManiaAction.Key2), "Key2 has not been released");
+            Assert.IsFalse(checkContains(generated.Frames[frame_offset + 3], ManiaAction.Key2), "Key2 has not been released");
         }
 
         [Test]
@@ -166,14 +173,14 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == 4, "Replay must have 4 frames");
+            Assert.IsTrue(generated.Frames.Count == frame_offset + 3, "Replay must have 3 generated frames");
-            Assert.AreEqual(1000, generated.Frames[1].Time, "Incorrect first note hit time");
+            Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect first note hit time");
-            Assert.AreEqual(3000, generated.Frames[2].Time, "Incorrect second note press time + first note release time");
+            Assert.AreEqual(3000, generated.Frames[frame_offset + 1].Time, "Incorrect second note press time + first note release time");
-            Assert.AreEqual(3000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[3].Time, "Incorrect second note release time");
+            Assert.AreEqual(3000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 2].Time, "Incorrect second note release time");
-            Assert.IsTrue(checkContains(generated.Frames[1], ManiaAction.Key1), "Key1 has not been pressed");
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset], ManiaAction.Key1), "Key1 has not been pressed");
-            Assert.IsFalse(checkContains(generated.Frames[2], ManiaAction.Key1), "Key1 has not been released");
+            Assert.IsFalse(checkContains(generated.Frames[frame_offset + 1], ManiaAction.Key1), "Key1 has not been released");
-            Assert.IsTrue(checkContains(generated.Frames[2], ManiaAction.Key2), "Key2 has not been pressed");
+            Assert.IsTrue(checkContains(generated.Frames[frame_offset + 1], ManiaAction.Key2), "Key2 has not been pressed");
-            Assert.IsFalse(checkContains(generated.Frames[3], ManiaAction.Key2), "Key2 has not been released");
+            Assert.IsFalse(checkContains(generated.Frames[frame_offset + 2], ManiaAction.Key2), "Key2 has not been released");
         }
 
         private bool checkContains(ReplayFrame frame, params ManiaAction[] actions) => actions.All(action => ((ManiaReplayFrame)frame).Actions.Contains(action));

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

@@ -6,7 +6,6 @@ using osu.Framework.Graphics.Containers;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Graphics;
-using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Edit.Blueprints;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
@@ -39,6 +38,8 @@ namespace osu.Game.Rulesets.Mania.Tests
                     AccentColour = { Value = OsuColour.Gray(0.3f) }
                 }
             };
+
+            AddBlueprint(new HoldNoteSelectionBlueprint(drawableObject));
         }
 
         protected override void Update()
@@ -51,7 +52,5 @@ namespace osu.Game.Rulesets.Mania.Tests
                 nested.Y = (float)(-finalPosition * content.DrawHeight);
             }
         }
-
-        protected override SelectionBlueprint CreateBlueprint() => new HoldNoteSelectionBlueprint(drawableObject);
     }
 }

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

@@ -5,7 +5,6 @@ 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.Mania.Edit.Blueprints;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
@@ -17,8 +16,6 @@ namespace osu.Game.Rulesets.Mania.Tests
 {
     public class TestSceneNoteSelectionBlueprint : ManiaSelectionBlueprintTestScene
     {
-        private readonly DrawableNote drawableObject;
-
         protected override Container<Drawable> Content => content ?? base.Content;
         private readonly Container content;
 
@@ -27,6 +24,8 @@ namespace osu.Game.Rulesets.Mania.Tests
             var note = new Note { Column = 0 };
             note.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
 
+            DrawableNote drawableObject;
+
             base.Content.Child = content = new ScrollingTestContainer(ScrollingDirection.Down)
             {
                 Anchor = Anchor.Centre,
@@ -34,8 +33,8 @@ namespace osu.Game.Rulesets.Mania.Tests
                 Size = new Vector2(50, 20),
                 Child = drawableObject = new DrawableNote(note)
             };
-        }
 
-        protected override SelectionBlueprint CreateBlueprint() => new NoteSelectionBlueprint(drawableObject);
+            AddBlueprint(new NoteSelectionBlueprint(drawableObject));
+        }
     }
 }

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

@@ -15,7 +15,6 @@ using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
 using osu.Game.Rulesets.Mania.UI;
 using osu.Game.Rulesets.Mods;
-using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.UI.Scrolling;
 using osu.Game.Tests.Visual;
 using osuTK;
@@ -67,6 +66,8 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             AddAssert("check note anchors", () => notesInStageAreAnchored(stages[0], Anchor.TopCentre));
             AddAssert("check note anchors", () => notesInStageAreAnchored(stages[1], Anchor.BottomCentre));
+            AddAssert("check bar anchors", () => barsInStageAreAnchored(stages[0], Anchor.TopCentre));
+            AddAssert("check bar anchors", () => barsInStageAreAnchored(stages[1], Anchor.BottomCentre));
 
             AddStep("flip direction", () =>
             {
@@ -76,10 +77,14 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             AddAssert("check note anchors", () => notesInStageAreAnchored(stages[0], Anchor.BottomCentre));
             AddAssert("check note anchors", () => notesInStageAreAnchored(stages[1], Anchor.TopCentre));
+            AddAssert("check bar anchors", () => barsInStageAreAnchored(stages[0], Anchor.BottomCentre));
+            AddAssert("check bar anchors", () => barsInStageAreAnchored(stages[1], Anchor.TopCentre));
         }
 
         private bool notesInStageAreAnchored(ManiaStage stage, Anchor anchor) => stage.Columns.SelectMany(c => c.AllHitObjects).All(o => o.Anchor == anchor);
 
+        private bool barsInStageAreAnchored(ManiaStage stage, Anchor anchor) => stage.AllHitObjects.Where(obj => obj is DrawableBarLine).All(o => o.Anchor == anchor);
+
         private void createNote()
         {
             foreach (var stage in stages)

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

@@ -2,14 +2,14 @@
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup Label="Project References">
     <ProjectReference Include="..\osu.Game.Rulesets.Mania\osu.Game.Rulesets.Mania.csproj" />

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

@@ -3,7 +3,6 @@
 
 using System;
 using osu.Framework.Graphics;
-using osu.Framework.Input.Events;
 using osu.Game.Rulesets.Mania.Edit.Blueprints.Components;
 using osu.Game.Rulesets.Mania.Objects;
 using osuTK;
@@ -49,13 +48,13 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
 
         private double originalStartTime;
 
-        protected override bool OnMouseMove(MouseMoveEvent e)
+        public override void UpdatePosition(Vector2 screenSpacePosition)
         {
-            base.OnMouseMove(e);
+            base.UpdatePosition(screenSpacePosition);
 
             if (PlacementBegun)
             {
-                var endTime = TimeAt(e.ScreenSpaceMousePosition);
+                var endTime = TimeAt(screenSpacePosition);
 
                 HitObject.StartTime = endTime < originalStartTime ? endTime : originalStartTime;
                 HitObject.Duration = Math.Abs(endTime - originalStartTime);
@@ -65,10 +64,8 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
                 headPiece.Width = tailPiece.Width = SnappedWidth;
                 headPiece.X = tailPiece.X = SnappedMousePosition.X;
 
-                originalStartTime = HitObject.StartTime = TimeAt(e.ScreenSpaceMousePosition);
+                originalStartTime = HitObject.StartTime = TimeAt(screenSpacePosition);
-            }
+            }
-
-            return true;
         }
     }
 }

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

@@ -16,45 +16,51 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
 {
     public class HoldNoteSelectionBlueprint : ManiaSelectionBlueprint
     {
-        public new DrawableHoldNote HitObject => (DrawableHoldNote)base.HitObject;
+        public new DrawableHoldNote DrawableObject => (DrawableHoldNote)base.DrawableObject;
 
         private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
 
-        private readonly BodyPiece body;
+        [Resolved]
+        private OsuColour colours { get; set; }
 
         public HoldNoteSelectionBlueprint(DrawableHoldNote hold)
             : base(hold)
         {
-            InternalChildren = new Drawable[]
-            {
-                new HoldNoteNoteSelectionBlueprint(hold.Head),
-                new HoldNoteNoteSelectionBlueprint(hold.Tail),
-                body = new BodyPiece
-                {
-                    AccentColour = Color4.Transparent
-                },
-            };
         }
 
         [BackgroundDependencyLoader]
-        private void load(OsuColour colours, IScrollingInfo scrollingInfo)
+        private void load(IScrollingInfo scrollingInfo)
         {
-            body.BorderColour = colours.Yellow;
-
             direction.BindTo(scrollingInfo.Direction);
         }
 
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            InternalChildren = new Drawable[]
+            {
+                new HoldNoteNoteSelectionBlueprint(DrawableObject.Head),
+                new HoldNoteNoteSelectionBlueprint(DrawableObject.Tail),
+                new BodyPiece
+                {
+                    AccentColour = Color4.Transparent,
+                    BorderColour = colours.Yellow
+                },
+            };
+        }
+
         protected override void Update()
         {
             base.Update();
 
-            Size = HitObject.DrawSize + new Vector2(0, HitObject.Tail.DrawHeight);
+            Size = DrawableObject.DrawSize + new Vector2(0, DrawableObject.Tail.DrawHeight);
 
             // 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;
+                Y -= DrawableObject.Tail.DrawHeight;
         }
 
         public override Quad SelectionQuad => ScreenSpaceDrawQuad;
@@ -71,10 +77,10 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
             {
                 base.Update();
 
-                Anchor = HitObject.Anchor;
+                Anchor = DrawableObject.Anchor;
-                Origin = HitObject.Origin;
+                Origin = DrawableObject.Origin;
 
-                Position = HitObject.DrawPosition;
+                Position = DrawableObject.DrawPosition;
             }
 
             // Todo: This is temporary, since the note masks don't do anything special yet. In the future they will handle input.

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

@@ -49,10 +49,8 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
             if (Column == null)
                 return base.OnMouseDown(e);
 
-            HitObject.StartTime = TimeAt(e.ScreenSpaceMousePosition);
             HitObject.Column = Column.Index;
-
+            BeginPlacement(TimeAt(e.ScreenSpaceMousePosition));
-            BeginPlacement();
             return true;
         }
 
@@ -62,19 +60,18 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
             return base.OnMouseUp(e);
         }
 
-        protected override bool OnMouseMove(MouseMoveEvent e)
+        public override void UpdatePosition(Vector2 screenSpacePosition)
         {
             if (!PlacementBegun)
-                Column = ColumnAt(e.ScreenSpaceMousePosition);
+                Column = ColumnAt(screenSpacePosition);
 
-            if (Column == null) return false;
+            if (Column == null) return;
 
             SnappedWidth = Column.DrawWidth;
 
             // Snap to the column
             var parentPos = Parent.ToLocalSpace(Column.ToScreenSpace(new Vector2(Column.DrawWidth / 2, 0)));
-            SnappedMousePosition = new Vector2(parentPos.X, e.MousePosition.Y);
+            SnappedMousePosition = new Vector2(parentPos.X, Parent.ToLocalSpace(screenSpacePosition).Y);
-            return true;
         }
 
         protected double TimeAt(Vector2 screenSpacePosition)
@@ -86,7 +83,7 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
 
             // If we're scrolling downwards, a position of 0 is actually further away from the hit target
             // so we need to flip the vertical coordinate in the hitobject container's space
-            var hitObjectPos = Column.HitObjectContainer.ToLocalSpace(applyPositionOffset(screenSpacePosition, false)).Y;
+            var hitObjectPos = mouseToHitObjectPosition(Column.HitObjectContainer.ToLocalSpace(screenSpacePosition)).Y;
             if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
                 hitObjectPos = hitObjectContainer.DrawHeight - hitObjectPos;
 
@@ -103,16 +100,58 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
                 scrollingInfo.TimeRange.Value,
                 Column.HitObjectContainer.DrawHeight);
 
-            return applyPositionOffset(Column.HitObjectContainer.ToSpaceOfOtherDrawable(new Vector2(0, pos), Parent), true).Y;
+            if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
+                pos = Column.HitObjectContainer.DrawHeight - pos;
+
+            return hitObjectToMousePosition(Column.HitObjectContainer.ToSpaceOfOtherDrawable(new Vector2(0, pos), Parent)).Y;
         }
 
         protected Column ColumnAt(Vector2 screenSpacePosition)
-            => composer.ColumnAt(applyPositionOffset(screenSpacePosition, false));
+            => composer.ColumnAt(screenSpacePosition);
 
-        private Vector2 applyPositionOffset(Vector2 position, bool reverse)
+        /// <summary>
+        /// Converts a mouse position to a hitobject position.
+        /// </summary>
+        /// <remarks>
+        /// Blueprints are centred on the mouse position, such that the hitobject position is anchored at the top or bottom of the blueprint depending on the scroll direction.
+        /// </remarks>
+        /// <param name="mousePosition">The mouse position.</param>
+        /// <returns>The resulting hitobject position, acnhored at the top or bottom of the blueprint depending on the scroll direction.</returns>
+        private Vector2 mouseToHitObjectPosition(Vector2 mousePosition)
         {
-            position.Y += (scrollingInfo.Direction.Value == ScrollingDirection.Up && !reverse ? -1 : 1) * NotePiece.NOTE_HEIGHT / 2;
+            switch (scrollingInfo.Direction.Value)
-            return position;
+            {
+                case ScrollingDirection.Up:
+                    mousePosition.Y -= NotePiece.NOTE_HEIGHT / 2;
+                    break;
+
+                case ScrollingDirection.Down:
+                    mousePosition.Y += NotePiece.NOTE_HEIGHT / 2;
+                    break;
+            }
+
+            return mousePosition;
+        }
+
+        /// <summary>
+        /// Converts a hitobject position to a mouse position.
+        /// </summary>
+        /// <param name="hitObjectPosition">The hitobject position.</param>
+        /// <returns>The resulting mouse position, anchored at the centre of the hitobject.</returns>
+        private Vector2 hitObjectToMousePosition(Vector2 hitObjectPosition)
+        {
+            switch (scrollingInfo.Direction.Value)
+            {
+                case ScrollingDirection.Up:
+                    hitObjectPosition.Y += NotePiece.NOTE_HEIGHT / 2;
+                    break;
+
+                case ScrollingDirection.Down:
+                    hitObjectPosition.Y -= NotePiece.NOTE_HEIGHT / 2;
+                    break;
+            }
+
+            return hitObjectPosition;
         }
     }
 }

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

@@ -18,7 +18,7 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
         public Vector2 ScreenSpaceDragPosition { get; private set; }
         public Vector2 DragPosition { get; private set; }
 
-        protected new DrawableManiaHitObject HitObject => (DrawableManiaHitObject)base.HitObject;
+        public new DrawableManiaHitObject DrawableObject => (DrawableManiaHitObject)base.DrawableObject;
 
         protected IClock EditorClock { get; private set; }
 
@@ -28,8 +28,8 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
         [Resolved]
         private IManiaHitObjectComposer composer { get; set; }
 
-        public ManiaSelectionBlueprint(DrawableHitObject hitObject)
+        public ManiaSelectionBlueprint(DrawableHitObject drawableObject)
-            : base(hitObject)
+            : base(drawableObject)
         {
             RelativeSizeAxes = Axes.None;
         }
@@ -44,13 +44,13 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
         {
             base.Update();
 
-            Position = Parent.ToLocalSpace(HitObject.ToScreenSpace(Vector2.Zero));
+            Position = Parent.ToLocalSpace(DrawableObject.ToScreenSpace(Vector2.Zero));
         }
 
         protected override bool OnMouseDown(MouseDownEvent e)
         {
             ScreenSpaceDragPosition = e.ScreenSpaceMousePosition;
-            DragPosition = HitObject.ToLocalSpace(e.ScreenSpaceMousePosition);
+            DragPosition = DrawableObject.ToLocalSpace(e.ScreenSpaceMousePosition);
 
             return base.OnMouseDown(e);
         }
@@ -60,20 +60,20 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
             var result = base.OnDrag(e);
 
             ScreenSpaceDragPosition = e.ScreenSpaceMousePosition;
-            DragPosition = HitObject.ToLocalSpace(e.ScreenSpaceMousePosition);
+            DragPosition = DrawableObject.ToLocalSpace(e.ScreenSpaceMousePosition);
 
             return result;
         }
 
         public override void Show()
         {
-            HitObject.AlwaysAlive = true;
+            DrawableObject.AlwaysAlive = true;
             base.Show();
         }
 
         public override void Hide()
         {
-            HitObject.AlwaysAlive = false;
+            DrawableObject.AlwaysAlive = false;
             base.Hide();
         }
     }

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

@@ -19,7 +19,7 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
         {
             base.Update();
 
-            Size = HitObject.DrawSize;
+            Size = DrawableObject.DrawSize;
         }
     }
 }

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

@@ -3,9 +3,7 @@
 
 using System.Linq;
 using osu.Framework.Allocation;
-using osu.Framework.Input.Events;
 using osu.Framework.Timing;
-using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Edit.Blueprints;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.UI;
@@ -31,13 +29,16 @@ namespace osu.Game.Rulesets.Mania.Edit
             editorClock = clock;
         }
 
-        public override void HandleDrag(SelectionBlueprint blueprint, DragEvent dragEvent)
+        public override void HandleMovement(MoveSelectionEvent moveEvent)
         {
-            adjustOrigins((ManiaSelectionBlueprint)blueprint);
+            var maniaBlueprint = (ManiaSelectionBlueprint)moveEvent.Blueprint;
-            performDragMovement(dragEvent);
+            int lastColumn = maniaBlueprint.DrawableObject.HitObject.Column;
-            performColumnMovement(dragEvent);
 
-            base.HandleDrag(blueprint, dragEvent);
+            adjustOrigins(maniaBlueprint);
+            performDragMovement(moveEvent);
+            performColumnMovement(lastColumn, moveEvent);
+
+            base.HandleMovement(moveEvent);
         }
 
         /// <summary>
@@ -47,41 +48,44 @@ namespace osu.Game.Rulesets.Mania.Edit
         /// <param name="reference">The <see cref="ManiaSelectionBlueprint"/> that received the drag event.</param>
         private void adjustOrigins(ManiaSelectionBlueprint reference)
         {
-            var referenceParent = (HitObjectContainer)reference.HitObject.Parent;
+            var referenceParent = (HitObjectContainer)reference.DrawableObject.Parent;
 
-            float offsetFromReferenceOrigin = reference.DragPosition.Y - reference.HitObject.OriginPosition.Y;
+            float offsetFromReferenceOrigin = reference.DragPosition.Y - reference.DrawableObject.OriginPosition.Y;
             float targetPosition = referenceParent.ToLocalSpace(reference.ScreenSpaceDragPosition).Y - offsetFromReferenceOrigin;
 
             // Flip the vertical coordinate space when scrolling downwards
             if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
                 targetPosition = targetPosition - referenceParent.DrawHeight;
 
-            float movementDelta = targetPosition - reference.HitObject.Position.Y;
+            float movementDelta = targetPosition - reference.DrawableObject.Position.Y;
 
             foreach (var b in SelectedBlueprints.OfType<ManiaSelectionBlueprint>())
-                b.HitObject.Y += movementDelta;
+                b.DrawableObject.Y += movementDelta;
         }
 
-        private void performDragMovement(DragEvent dragEvent)
+        private void performDragMovement(MoveSelectionEvent moveEvent)
         {
+            float delta = moveEvent.InstantDelta.Y;
+
+            // When scrolling downwards the anchor position is at the bottom of the screen, however the movement event assumes the anchor is at the top of the screen.
+            // This causes the delta to assume a positive hitobject position, and which can be corrected for by subtracting the parent height.
+            if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
+                delta -= moveEvent.Blueprint.DrawableObject.Parent.DrawHeight;
+
             foreach (var b in SelectedBlueprints)
             {
-                var hitObject = b.HitObject;
+                var hitObject = b.DrawableObject;
-
                 var objectParent = (HitObjectContainer)hitObject.Parent;
 
-                // Using the hitobject position is required since AdjustPosition can be invoked multiple times per frame
+                // StartTime could be used to adjust the position if only one movement event was received per frame.
-                // without the position having been updated by the parenting ScrollingHitObjectContainer
+                // However this is not the case and ScrollingHitObjectContainer performs movement in UpdateAfterChildren() so the position must also be updated to be valid for further movement events
-                hitObject.Y += dragEvent.Delta.Y;
+                hitObject.Y += delta;
 
-                float targetPosition;
+                float targetPosition = hitObject.Position.Y;
 
-                // If we're scrolling downwards, a position of 0 is actually further away from the hit target
+                // The scrolling algorithm always assumes an anchor at the top of the screen, so the position must be flipped when scrolling downwards to reflect a top anchor
-                // so we need to flip the vertical coordinate in the hitobject container's space
                 if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
-                    targetPosition = -hitObject.Position.Y;
+                    targetPosition = -targetPosition;
-                else
-                    targetPosition = hitObject.Position.Y;
 
                 objectParent.Remove(hitObject);
 
@@ -94,14 +98,13 @@ namespace osu.Game.Rulesets.Mania.Edit
             }
         }
 
-        private void performColumnMovement(DragEvent dragEvent)
+        private void performColumnMovement(int lastColumn, MoveSelectionEvent moveEvent)
         {
-            var lastColumn = composer.ColumnAt(dragEvent.ScreenSpaceLastMousePosition);
+            var currentColumn = composer.ColumnAt(moveEvent.ScreenSpacePosition);
-            var currentColumn = composer.ColumnAt(dragEvent.ScreenSpaceMousePosition);
+            if (currentColumn == null)
-            if (lastColumn == null || currentColumn == null)
                 return;
 
-            int columnDelta = currentColumn.Index - lastColumn.Index;
+            int columnDelta = currentColumn.Index - lastColumn;
             if (columnDelta == 0)
                 return;
 

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

@@ -9,8 +9,8 @@ namespace osu.Game.Rulesets.Mania.Edit.Masks
 {
     public abstract class ManiaSelectionBlueprint : SelectionBlueprint
     {
-        protected ManiaSelectionBlueprint(DrawableHitObject hitObject)
+        protected ManiaSelectionBlueprint(DrawableHitObject drawableObject)
-            : base(hitObject)
+            : base(drawableObject)
         {
             RelativeSizeAxes = Axes.None;
         }

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

@@ -0,0 +1,12 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Rulesets.Objects;
+
+namespace osu.Game.Rulesets.Mania.Objects
+{
+    public class BarLine : ManiaHitObject, IBarLine
+    {
+        public bool Major { get; set; }
+    }
+}

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

@@ -4,7 +4,6 @@
 using osuTK;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Shapes;
-using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osuTK.Graphics;
 
@@ -14,7 +13,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
     /// Visualises a <see cref="BarLine"/>. Although this derives DrawableManiaHitObject,
     /// this does not handle input/sound like a normal hit object.
     /// </summary>
-    public class DrawableBarLine : DrawableHitObject<BarLine>
+    public class DrawableBarLine : DrawableManiaHitObject<BarLine>
     {
         /// <summary>
         /// Height of major bar line triangles.

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

@@ -2,13 +2,12 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Diagnostics;
-using System.Linq;
 using osu.Framework.Bindables;
-using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Mania.Objects.Drawables.Pieces;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Input.Bindings;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI.Scrolling;
@@ -22,8 +21,12 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
     {
         public override bool DisplayResult => false;
 
-        public readonly DrawableNote Head;
+        public DrawableNote Head => headContainer.Child;
-        public readonly DrawableNote Tail;
+        public DrawableNote Tail => tailContainer.Child;
+
+        private readonly Container<DrawableHeadNote> headContainer;
+        private readonly Container<DrawableTailNote> tailContainer;
+        private readonly Container<DrawableHoldNoteTick> tickContainer;
 
         private readonly BodyPiece bodyPiece;
 
@@ -40,50 +43,81 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
         public DrawableHoldNote(HoldNote hitObject)
             : base(hitObject)
         {
-            Container<DrawableHoldNoteTick> tickContainer;
             RelativeSizeAxes = Axes.X;
 
             AddRangeInternal(new Drawable[]
             {
-                bodyPiece = new BodyPiece
+                bodyPiece = new BodyPiece { RelativeSizeAxes = Axes.X },
-                {
+                tickContainer = new Container<DrawableHoldNoteTick> { RelativeSizeAxes = Axes.Both },
-                    RelativeSizeAxes = Axes.X,
+                headContainer = new Container<DrawableHeadNote> { RelativeSizeAxes = Axes.Both },
-                },
+                tailContainer = new Container<DrawableTailNote> { RelativeSizeAxes = Axes.Both },
-                tickContainer = new Container<DrawableHoldNoteTick>
-                {
-                    RelativeSizeAxes = Axes.Both,
-                    ChildrenEnumerable = HitObject.NestedHitObjects.OfType<HoldNoteTick>().Select(tick => new DrawableHoldNoteTick(tick)
-                    {
-                        HoldStartTime = () => holdStartTime
-                    })
-                },
-                Head = new DrawableHeadNote(this)
-                {
-                    Anchor = Anchor.TopCentre,
-                    Origin = Anchor.TopCentre
-                },
-                Tail = new DrawableTailNote(this)
-                {
-                    Anchor = Anchor.TopCentre,
-                    Origin = Anchor.TopCentre
-                }
             });
 
-            foreach (var tick in tickContainer)
-                AddNested(tick);
-
-            AddNested(Head);
-            AddNested(Tail);
-
             AccentColour.BindValueChanged(colour =>
             {
                 bodyPiece.AccentColour = colour.NewValue;
-                Head.AccentColour.Value = colour.NewValue;
-                Tail.AccentColour.Value = colour.NewValue;
-                tickContainer.ForEach(t => t.AccentColour.Value = colour.NewValue);
             }, true);
         }
 
+        protected override void AddNestedHitObject(DrawableHitObject hitObject)
+        {
+            base.AddNestedHitObject(hitObject);
+
+            switch (hitObject)
+            {
+                case DrawableHeadNote head:
+                    headContainer.Child = head;
+                    break;
+
+                case DrawableTailNote tail:
+                    tailContainer.Child = tail;
+                    break;
+
+                case DrawableHoldNoteTick tick:
+                    tickContainer.Add(tick);
+                    break;
+            }
+        }
+
+        protected override void ClearNestedHitObjects()
+        {
+            base.ClearNestedHitObjects();
+            headContainer.Clear();
+            tailContainer.Clear();
+            tickContainer.Clear();
+        }
+
+        protected override DrawableHitObject CreateNestedHitObject(HitObject hitObject)
+        {
+            switch (hitObject)
+            {
+                case TailNote _:
+                    return new DrawableTailNote(this)
+                    {
+                        Anchor = Anchor.TopCentre,
+                        Origin = Anchor.TopCentre,
+                        AccentColour = { BindTarget = AccentColour }
+                    };
+
+                case Note _:
+                    return new DrawableHeadNote(this)
+                    {
+                        Anchor = Anchor.TopCentre,
+                        Origin = Anchor.TopCentre,
+                        AccentColour = { BindTarget = AccentColour }
+                    };
+
+                case HoldNoteTick tick:
+                    return new DrawableHoldNoteTick(tick)
+                    {
+                        HoldStartTime = () => holdStartTime,
+                        AccentColour = { BindTarget = AccentColour }
+                    };
+            }
+
+            return base.CreateNestedHitObject(hitObject);
+        }
+
         protected override void OnDirectionChanged(ValueChangedEvent<ScrollingDirection> e)
         {
             base.OnDirectionChanged(e);

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

@@ -18,8 +18,6 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
     /// </summary>
     public class DrawableNote : DrawableManiaHitObject<Note>, IKeyBindingHandler<ManiaAction>
     {
-        public const float CORNER_RADIUS = NotePiece.NOTE_HEIGHT / 2;
-
         private readonly NotePiece headPiece;
 
         public DrawableNote(Note hitObject)

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

@@ -101,6 +101,6 @@ namespace osu.Game.Rulesets.Mania.Objects
 
         public override Judgement CreateJudgement() => new HoldNoteJudgement();
 
-        protected override HitWindows CreateHitWindows() => null;
+        protected override HitWindows CreateHitWindows() => HitWindows.Empty;
     }
 }

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

@@ -14,6 +14,6 @@ namespace osu.Game.Rulesets.Mania.Objects
     {
         public override Judgement CreateJudgement() => new HoldNoteTickJudgement();
 
-        protected override HitWindows CreateHitWindows() => null;
+        protected override HitWindows CreateHitWindows() => HitWindows.Empty;
     }
 }

osu.Game.Rulesets.Mania/Replays/ManiaAutoGenerator.cs

@@ -47,9 +47,6 @@ namespace osu.Game.Rulesets.Mania.Replays
 
         public override Replay Generate()
         {
-            // Todo: Realistically this shouldn't be needed, but the first frame is skipped with the way replays are currently handled
-            Replay.Frames.Add(new ManiaReplayFrame(-100000, 0));
-
             var pointGroups = generateActionPoints().GroupBy(a => a.Time).OrderBy(g => g.First().Time);
 
             var actions = new List<ManiaAction>();
@@ -70,6 +67,10 @@ namespace osu.Game.Rulesets.Mania.Replays
                     }
                 }
 
+                // todo: can be removed once FramedReplayInputHandler correctly handles rewinding before first frame.
+                if (Replay.Frames.Count == 0)
+                    Replay.Frames.Add(new ManiaReplayFrame(group.First().Time - 1));
+
                 Replay.Frames.Add(new ManiaReplayFrame(group.First().Time, actions.ToArray()));
             }
 

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

@@ -42,7 +42,7 @@ namespace osu.Game.Rulesets.Mania.UI
         public DrawableManiaRuleset(Ruleset ruleset, IWorkingBeatmap beatmap, IReadOnlyList<Mod> mods)
             : base(ruleset, beatmap, mods)
         {
-            BarLines = new BarLineGenerator(Beatmap).BarLines;
+            BarLines = new BarLineGenerator<BarLine>(Beatmap).BarLines;
         }
 
         [BackgroundDependencyLoader]

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

@@ -8,7 +8,6 @@ using System.Collections.Generic;
 using System.Linq;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Objects;
-using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.UI.Scrolling;
 using osuTK;

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

@@ -12,7 +12,6 @@ using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
-using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.UI;
 using osu.Game.Rulesets.UI.Scrolling;

osu.Game.Rulesets.Osu.Tests/.vscode/launch.json

@@ -7,7 +7,7 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/bin/Debug/netcoreapp2.2/osu.Game.Rulesets.Osu.Tests.dll"
+                "${workspaceRoot}/bin/Debug/netcoreapp3.0/osu.Game.Rulesets.Osu.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build (Debug)",
@@ -20,7 +20,7 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/bin/Release/netcoreapp2.2/osu.Game.Rulesets.Osu.Tests.dll"
+                "${workspaceRoot}/bin/Release/netcoreapp3.0/osu.Game.Rulesets.Osu.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build (Release)",

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

@@ -7,6 +7,7 @@ using System.Linq;
 using System.Text;
 using NUnit.Framework;
 using osu.Game.Beatmaps;
+using osu.Game.IO;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Tests.Beatmaps;
@@ -21,7 +22,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         public void TestStacking()
         {
             using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(beatmap_data)))
-            using (var reader = new StreamReader(stream))
+            using (var reader = new LineBufferedReader(stream))
             {
                 var beatmap = Decoder.GetDecoder<Beatmap>(reader).Decode(reader);
                 var converted = new TestWorkingBeatmap(beatmap).GetPlayableBeatmap(new OsuRuleset().RulesetInfo, Array.Empty<Mod>());

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

@@ -0,0 +1,26 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Bindables;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestSceneHitCircleComboChange : TestSceneHitCircle
+    {
+        private readonly Bindable<int> comboIndex = new Bindable<int>();
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            Scheduler.AddDelayed(() => comboIndex.Value++, 250, true);
+        }
+
+        protected override TestDrawableHitCircle CreateDrawableHitCircle(HitCircle circle, bool auto)
+        {
+            circle.ComboIndexBindable.BindTo(comboIndex);
+            circle.IndexInCurrentComboBindable.BindTo(comboIndex);
+            return base.CreateDrawableHitCircle(circle, auto);
+        }
+    }
+}

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

@@ -29,6 +29,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             };
 
             for (int i = 0; i < 512; i++)
+                if (i % 32 < 20)
                     beatmap.HitObjects.Add(new HitCircle { Position = new Vector2(256, 192), StartTime = i * 100 });
 
             return beatmap;

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

@@ -1,10 +1,11 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using NUnit.Framework;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
-using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles;
+using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
 using osu.Game.Tests.Visual;
@@ -14,16 +15,58 @@ namespace osu.Game.Rulesets.Osu.Tests
 {
     public class TestSceneHitCircleSelectionBlueprint : SelectionBlueprintTestScene
     {
-        private readonly DrawableHitCircle drawableObject;
+        private HitCircle hitCircle;
+        private DrawableHitCircle drawableObject;
+        private TestBlueprint blueprint;
 
-        public TestSceneHitCircleSelectionBlueprint()
+        [SetUp]
+        public void Setup() => Schedule(() =>
         {
-            var hitCircle = new HitCircle { Position = new Vector2(256, 192) };
+            Clear();
+
+            hitCircle = new HitCircle { Position = new Vector2(256, 192) };
             hitCircle.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 });
 
             Add(drawableObject = new DrawableHitCircle(hitCircle));
+            AddBlueprint(blueprint = new TestBlueprint(drawableObject));
+        });
+
+        [Test]
+        public void TestInitialState()
+        {
+            AddAssert("blueprint positioned over hitobject", () => blueprint.CirclePiece.Position == hitCircle.Position);
         }
 
-        protected override SelectionBlueprint CreateBlueprint() => new HitCircleSelectionBlueprint(drawableObject);
+        [Test]
+        public void TestMoveHitObject()
+        {
+            AddStep("move hitobject", () => hitCircle.Position = new Vector2(300, 225));
+            AddAssert("blueprint positioned over hitobject", () => blueprint.CirclePiece.Position == hitCircle.Position);
+        }
+
+        [Test]
+        public void TestMoveAfterApplyingDefaults()
+        {
+            AddStep("apply defaults", () => hitCircle.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 }));
+            AddStep("move hitobject", () => hitCircle.Position = new Vector2(300, 225));
+            AddAssert("blueprint positioned over hitobject", () => blueprint.CirclePiece.Position == hitCircle.Position);
+        }
+
+        [Test]
+        public void TestStackedHitObject()
+        {
+            AddStep("set stacking", () => hitCircle.StackHeight = 5);
+            AddAssert("blueprint positioned over hitobject", () => blueprint.CirclePiece.Position == hitCircle.StackedPosition);
+        }
+
+        private class TestBlueprint : HitCircleSelectionBlueprint
+        {
+            public new HitCirclePiece CirclePiece => base.CirclePiece;
+
+            public TestBlueprint(DrawableHitCircle drawableCircle)
+                : base(drawableCircle)
+            {
+            }
+        }
     }
 }

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

@@ -0,0 +1,176 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Input.Events;
+using osu.Framework.MathUtils;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Beatmaps;
+using osu.Game.Rulesets.Osu.Edit;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Screens.Edit;
+using osu.Game.Screens.Edit.Compose.Components;
+using osu.Game.Tests.Visual;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestSceneOsuDistanceSnapGrid : ManualInputManagerTestScene
+    {
+        private const double beat_length = 100;
+        private static readonly Vector2 grid_position = new Vector2(512, 384);
+
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(CircularDistanceSnapGrid)
+        };
+
+        [Cached(typeof(IEditorBeatmap))]
+        private readonly EditorBeatmap<OsuHitObject> editorBeatmap;
+
+        [Cached]
+        private readonly BindableBeatDivisor beatDivisor = new BindableBeatDivisor();
+
+        [Cached(typeof(IDistanceSnapProvider))]
+        private readonly SnapProvider snapProvider = new SnapProvider();
+
+        private readonly TestOsuDistanceSnapGrid grid;
+
+        public TestSceneOsuDistanceSnapGrid()
+        {
+            editorBeatmap = new EditorBeatmap<OsuHitObject>(new OsuBeatmap());
+
+            Children = new Drawable[]
+            {
+                new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Colour = Color4.SlateGray
+                },
+                grid = new TestOsuDistanceSnapGrid(new HitCircle { Position = grid_position }),
+                new SnappingCursorContainer { GetSnapPosition = v => grid.GetSnappedPosition(grid.ToLocalSpace(v)).position }
+            };
+        }
+
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            editorBeatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier = 1;
+            editorBeatmap.ControlPointInfo.Clear();
+            editorBeatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = beat_length });
+        });
+
+        [TestCase(1)]
+        [TestCase(2)]
+        [TestCase(3)]
+        [TestCase(4)]
+        [TestCase(6)]
+        [TestCase(8)]
+        [TestCase(12)]
+        [TestCase(16)]
+        public void TestBeatDivisor(int divisor)
+        {
+            AddStep($"set beat divisor = {divisor}", () => beatDivisor.Value = divisor);
+        }
+
+        [Test]
+        public void TestCursorInCentre()
+        {
+            AddStep("move mouse to centre", () => InputManager.MoveMouseTo(grid.ToScreenSpace(grid_position)));
+            assertSnappedDistance((float)beat_length);
+        }
+
+        [Test]
+        public void TestCursorBeforeMovementPoint()
+        {
+            AddStep("move mouse to just before movement point", () => InputManager.MoveMouseTo(grid.ToScreenSpace(grid_position + new Vector2((float)beat_length, 0) * 1.49f)));
+            assertSnappedDistance((float)beat_length);
+        }
+
+        [Test]
+        public void TestCursorAfterMovementPoint()
+        {
+            AddStep("move mouse to just after movement point", () => InputManager.MoveMouseTo(grid.ToScreenSpace(grid_position + new Vector2((float)beat_length, 0) * 1.51f)));
+            assertSnappedDistance((float)beat_length * 2);
+        }
+
+        private void assertSnappedDistance(float expectedDistance) => AddAssert($"snap distance = {expectedDistance}", () =>
+        {
+            Vector2 snappedPosition = grid.GetSnappedPosition(grid.ToLocalSpace(InputManager.CurrentState.Mouse.Position)).position;
+
+            return Precision.AlmostEquals(expectedDistance, Vector2.Distance(snappedPosition, grid_position));
+        });
+
+        private class SnappingCursorContainer : CompositeDrawable
+        {
+            public Func<Vector2, Vector2> GetSnapPosition;
+
+            private readonly Drawable cursor;
+
+            public SnappingCursorContainer()
+            {
+                RelativeSizeAxes = Axes.Both;
+
+                InternalChild = cursor = new Circle
+                {
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(50),
+                    Colour = Color4.Red
+                };
+            }
+
+            protected override void LoadComplete()
+            {
+                base.LoadComplete();
+
+                updatePosition(GetContainingInputManager().CurrentState.Mouse.Position);
+            }
+
+            protected override bool OnMouseMove(MouseMoveEvent e)
+            {
+                base.OnMouseMove(e);
+
+                updatePosition(e.ScreenSpaceMousePosition);
+                return true;
+            }
+
+            private void updatePosition(Vector2 screenSpacePosition)
+            {
+                cursor.Position = GetSnapPosition.Invoke(screenSpacePosition);
+            }
+        }
+
+        private class TestOsuDistanceSnapGrid : OsuDistanceSnapGrid
+        {
+            public new float DistanceSpacing => base.DistanceSpacing;
+
+            public TestOsuDistanceSnapGrid(OsuHitObject hitObject)
+                : base(hitObject)
+            {
+            }
+        }
+
+        private class SnapProvider : IDistanceSnapProvider
+        {
+            public (Vector2 position, double time) GetSnappedPosition(Vector2 position, double time) => (position, time);
+
+            public float GetBeatSnapDistanceAt(double referenceTime) => (float)beat_length;
+
+            public float DurationToDistance(double referenceTime, double duration) => 0;
+
+            public double DistanceToDuration(double referenceTime, float distance) => 0;
+
+            public double GetSnappedDurationFromDistance(double referenceTime, float distance) => 0;
+
+            public float GetSnappedDistanceFromDistance(double referenceTime, float distance) => 0;
+        }
+    }
+}

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

@@ -111,6 +111,21 @@ namespace osu.Game.Rulesets.Osu.Tests
             AddStep("Distance Overflow 1 Repeat", () => SetContents(() => testDistanceOverflow(1)));
         }
 
+        [Test]
+        public void TestChangeStackHeight()
+        {
+            DrawableSlider slider = null;
+
+            AddStep("create slider", () =>
+            {
+                slider = (DrawableSlider)createSlider(repeats: 1);
+                Add(slider);
+            });
+
+            AddStep("change stack height", () => slider.HitObject.StackHeight = 10);
+            AddAssert("body positioned correctly", () => slider.Position == slider.HitObject.StackedPosition);
+        }
+
         private Drawable testSimpleBig(int repeats = 0) => createSlider(2, repeats: repeats);
 
         private Drawable testSimpleBigLargeStackOffset(int repeats = 0) => createSlider(2, repeats: repeats, stackHeight: 10);
@@ -293,15 +308,11 @@ namespace osu.Game.Rulesets.Osu.Tests
         private Drawable createDrawable(Slider slider, float circleSize, double speedMultiplier)
         {
             var cpi = new ControlPointInfo();
-            cpi.DifficultyPoints.Add(new DifficultyControlPoint { SpeedMultiplier = speedMultiplier });
+            cpi.Add(0, new DifficultyControlPoint { SpeedMultiplier = speedMultiplier });
 
             slider.ApplyDefaults(cpi, new BeatmapDifficulty { CircleSize = circleSize, SliderTickRate = 3 });
 
-            var drawable = new DrawableSlider(slider)
+            var drawable = CreateDrawableSlider(slider);
-            {
-                Anchor = Anchor.Centre,
-                Depth = depthIndex++
-            };
 
             foreach (var mod in Mods.Value.OfType<IApplicableToDrawableHitObjects>())
                 mod.ApplyToDrawableHitObjects(new[] { drawable });
@@ -311,6 +322,12 @@ namespace osu.Game.Rulesets.Osu.Tests
             return drawable;
         }
 
+        protected virtual DrawableSlider CreateDrawableSlider(Slider slider) => new DrawableSlider(slider)
+        {
+            Anchor = Anchor.Centre,
+            Depth = depthIndex++
+        };
+
         private float judgementOffsetDirection = 1;
 
         private void onNewResult(DrawableHitObject judgedObject, JudgementResult result)

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

@@ -0,0 +1,28 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Bindables;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestSceneSliderComboChange : TestSceneSlider
+    {
+        private readonly Bindable<int> comboIndex = new Bindable<int>();
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            Scheduler.AddDelayed(() => comboIndex.Value++, 250, true);
+        }
+
+        protected override DrawableSlider CreateDrawableSlider(Slider slider)
+        {
+            slider.ComboIndexBindable.BindTo(comboIndex);
+            slider.IndexInCurrentComboBindable.BindTo(comboIndex);
+
+            return base.CreateDrawableSlider(slider);
+        }
+    }
+}

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

@@ -313,10 +313,6 @@ namespace osu.Game.Rulesets.Osu.Tests
                             }, 25),
                         }
                     },
-                    ControlPointInfo =
-                    {
-                        DifficultyPoints = { new DifficultyControlPoint { SpeedMultiplier = 0.1f } }
-                    },
                     BeatmapInfo =
                     {
                         BaseDifficulty = new BeatmapDifficulty { SliderTickRate = 3 },
@@ -324,6 +320,8 @@ namespace osu.Game.Rulesets.Osu.Tests
                     },
                 });
 
+                Beatmap.Value.Beatmap.ControlPointInfo.Add(0, new DifficultyControlPoint { SpeedMultiplier = 0.1f });
+
                 var p = new ScoreAccessibleReplayPlayer(new Score { Replay = new Replay { Frames = frames } });
 
                 p.OnLoadComplete += _ =>

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

@@ -3,11 +3,13 @@
 
 using System;
 using System.Collections.Generic;
+using NUnit.Framework;
+using osu.Framework.MathUtils;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
-using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components;
 using osu.Game.Rulesets.Osu.Objects;
@@ -29,11 +31,16 @@ namespace osu.Game.Rulesets.Osu.Tests
             typeof(PathControlPointPiece)
         };
 
-        private readonly DrawableSlider drawableObject;
+        private Slider slider;
+        private DrawableSlider drawableObject;
+        private TestSliderBlueprint blueprint;
 
-        public TestSceneSliderSelectionBlueprint()
+        [SetUp]
+        public void Setup() => Schedule(() =>
         {
-            var slider = new Slider
+            Clear();
+
+            slider = new Slider
             {
                 Position = new Vector2(256, 192),
                 Path = new SliderPath(PathType.Bezier, new[]
@@ -47,8 +54,78 @@ namespace osu.Game.Rulesets.Osu.Tests
             slider.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 });
 
             Add(drawableObject = new DrawableSlider(slider));
+            AddBlueprint(blueprint = new TestSliderBlueprint(drawableObject));
+        });
+
+        [Test]
+        public void TestInitialState()
+        {
+            checkPositions();
         }
 
-        protected override SelectionBlueprint CreateBlueprint() => new SliderSelectionBlueprint(drawableObject);
+        [Test]
+        public void TestMoveHitObject()
+        {
+            moveHitObject();
+            checkPositions();
+        }
+
+        [Test]
+        public void TestMoveAfterApplyingDefaults()
+        {
+            AddStep("apply defaults", () => slider.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 }));
+            moveHitObject();
+            checkPositions();
+        }
+
+        [Test]
+        public void TestStackedHitObject()
+        {
+            AddStep("set stacking", () => slider.StackHeight = 5);
+            checkPositions();
+        }
+
+        private void moveHitObject()
+        {
+            AddStep("move hitobject", () =>
+            {
+                slider.Position = new Vector2(300, 225);
+            });
+        }
+
+        private void checkPositions()
+        {
+            AddAssert("body positioned correctly", () => blueprint.BodyPiece.Position == slider.StackedPosition);
+
+            AddAssert("head positioned correctly",
+                () => Precision.AlmostEquals(blueprint.HeadBlueprint.CirclePiece.ScreenSpaceDrawQuad.Centre, drawableObject.HeadCircle.ScreenSpaceDrawQuad.Centre));
+
+            AddAssert("tail positioned correctly",
+                () => Precision.AlmostEquals(blueprint.TailBlueprint.CirclePiece.ScreenSpaceDrawQuad.Centre, drawableObject.TailCircle.ScreenSpaceDrawQuad.Centre));
+        }
+
+        private class TestSliderBlueprint : SliderSelectionBlueprint
+        {
+            public new SliderBodyPiece BodyPiece => base.BodyPiece;
+            public new TestSliderCircleBlueprint HeadBlueprint => (TestSliderCircleBlueprint)base.HeadBlueprint;
+            public new TestSliderCircleBlueprint TailBlueprint => (TestSliderCircleBlueprint)base.TailBlueprint;
+
+            public TestSliderBlueprint(DrawableSlider slider)
+                : base(slider)
+            {
+            }
+
+            protected override SliderCircleSelectionBlueprint CreateCircleSelectionBlueprint(DrawableSlider slider, SliderPosition position) => new TestSliderCircleBlueprint(slider, position);
+        }
+
+        private class TestSliderCircleBlueprint : SliderCircleSelectionBlueprint
+        {
+            public new HitCirclePiece CirclePiece => base.CirclePiece;
+
+            public TestSliderCircleBlueprint(DrawableSlider slider, SliderPosition position)
+                : base(slider, position)
+            {
+            }
+        }
     }
 }

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

@@ -0,0 +1,96 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Audio;
+using osu.Framework.MathUtils;
+using osu.Framework.Testing;
+using osu.Framework.Timing;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+using osuTK;
+using System.Collections.Generic;
+using System.Linq;
+using static osu.Game.Tests.Visual.OsuTestScene.ClockBackedTestWorkingBeatmap;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestSceneSpinnerRotation : TestSceneOsuPlayer
+    {
+        [Resolved]
+        private AudioManager audioManager { get; set; }
+
+        private TrackVirtualManual track;
+
+        protected override bool Autoplay => true;
+
+        protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap)
+        {
+            var working = new ClockBackedTestWorkingBeatmap(beatmap, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
+            track = (TrackVirtualManual)working.Track;
+            return working;
+        }
+
+        private DrawableSpinner drawableSpinner;
+
+        [SetUpSteps]
+        public override void SetUpSteps()
+        {
+            base.SetUpSteps();
+
+            AddUntilStep("wait for track to start running", () => track.IsRunning);
+            AddStep("retrieve spinner", () => drawableSpinner = (DrawableSpinner)((TestPlayer)Player).DrawableRuleset.Playfield.AllHitObjects.First());
+        }
+
+        [Test]
+        public void TestSpinnerRewindingRotation()
+        {
+            addSeekStep(5000);
+            AddAssert("is rotation absolute not almost 0", () => !Precision.AlmostEquals(drawableSpinner.Disc.RotationAbsolute, 0, 100));
+
+            addSeekStep(0);
+            AddAssert("is rotation absolute almost 0", () => Precision.AlmostEquals(drawableSpinner.Disc.RotationAbsolute, 0, 100));
+        }
+
+        [Test]
+        public void TestSpinnerMiddleRewindingRotation()
+        {
+            double estimatedRotation = 0;
+
+            addSeekStep(5000);
+            AddStep("retrieve rotation", () => estimatedRotation = drawableSpinner.Disc.RotationAbsolute);
+
+            addSeekStep(2500);
+            addSeekStep(5000);
+            AddAssert("is rotation absolute almost same", () => Precision.AlmostEquals(drawableSpinner.Disc.RotationAbsolute, estimatedRotation, 100));
+        }
+
+        private void addSeekStep(double time)
+        {
+            AddStep($"seek to {time}", () => track.Seek(time));
+
+            AddUntilStep("wait for seek to finish", () => Precision.AlmostEquals(time, ((TestPlayer)Player).DrawableRuleset.FrameStableClock.CurrentTime, 100));
+        }
+
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new Beatmap
+        {
+            HitObjects = new List<HitObject>
+            {
+                new Spinner
+                {
+                    Position = new Vector2(256, 192),
+                    EndTime = 5000,
+                },
+                // placeholder object to avoid hitting the results screen
+                new HitObject
+                {
+                    StartTime = 99999,
+                }
+            }
+        };
+    }
+}

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

@@ -7,7 +7,6 @@ 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.Blueprints.Spinners;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners.Components;
 using osu.Game.Rulesets.Osu.Objects;
@@ -25,8 +24,6 @@ namespace osu.Game.Rulesets.Osu.Tests
             typeof(SpinnerPiece)
         };
 
-        private readonly DrawableSpinner drawableSpinner;
-
         public TestSceneSpinnerSelectionBlueprint()
         {
             var spinner = new Spinner
@@ -35,16 +32,19 @@ namespace osu.Game.Rulesets.Osu.Tests
                 StartTime = -1000,
                 EndTime = 2000
             };
+
             spinner.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 });
 
+            DrawableSpinner drawableSpinner;
+
             Add(new Container
             {
                 RelativeSizeAxes = Axes.Both,
                 Size = new Vector2(0.5f),
                 Child = drawableSpinner = new DrawableSpinner(spinner)
             });
-        }
 
-        protected override SelectionBlueprint CreateBlueprint() => new SpinnerSelectionBlueprint(drawableSpinner) { Size = new Vector2(0.5f) };
+            AddBlueprint(new SpinnerSelectionBlueprint(drawableSpinner) { Size = new Vector2(0.5f) });
+        }
     }
 }

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

@@ -2,14 +2,14 @@
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup Label="Project References">
     <ProjectReference Include="..\osu.Game.Rulesets.Osu\osu.Game.Rulesets.Osu.csproj" />

osu.Game.Rulesets.Osu/Edit/Blueprints/BlueprintPiece.cs

@@ -0,0 +1,25 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Graphics.Containers;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Edit.Blueprints
+{
+    /// <summary>
+    /// A piece of a selection or placement blueprint which visualises an <see cref="OsuHitObject"/>.
+    /// </summary>
+    /// <typeparam name="T">The type of <see cref="OsuHitObject"/> which this <see cref="BlueprintPiece{T}"/> visualises.</typeparam>
+    public abstract class BlueprintPiece<T> : CompositeDrawable
+        where T : OsuHitObject
+    {
+        /// <summary>
+        /// Updates this <see cref="BlueprintPiece{T}"/> using the properties of a <see cref="OsuHitObject"/>.
+        /// </summary>
+        /// <param name="hitObject">The <see cref="OsuHitObject"/> to reference properties from.</param>
+        public virtual void UpdateFrom(T hitObject)
+        {
+            Position = hitObject.StackedPosition;
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Blueprints/HitCircles/Components/HitCirclePiece.cs

@@ -10,18 +10,13 @@ using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components
 {
-    public class HitCirclePiece : HitObjectPiece
+    public class HitCirclePiece : BlueprintPiece<HitCircle>
     {
-        private readonly HitCircle hitCircle;
+        public HitCirclePiece()
-
-        public HitCirclePiece(HitCircle hitCircle)
-            : base(hitCircle)
         {
-            this.hitCircle = hitCircle;
             Origin = Anchor.Centre;
 
             Size = new Vector2(OsuHitObject.OBJECT_RADIUS * 2);
-            Scale = new Vector2(hitCircle.Scale);
             CornerRadius = Size.X / 2;
 
             InternalChild = new RingPiece();
@@ -31,12 +26,13 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components
         private void load(OsuColour colours)
         {
             Colour = colours.Yellow;
-
-            PositionBindable.BindValueChanged(_ => UpdatePosition(), true);
-            StackHeightBindable.BindValueChanged(_ => UpdatePosition());
-            ScaleBindable.BindValueChanged(scale => Scale = new Vector2(scale.NewValue), true);
         }
 
-        protected virtual void UpdatePosition() => Position = hitCircle.StackedPosition;
+        public override void UpdateFrom(HitCircle hitObject)
+        {
+            base.UpdateFrom(hitObject);
+
+            Scale = new Vector2(hitObject.Scale);
+        }
     }
 }

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

@@ -13,31 +13,30 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles
     {
         public new HitCircle HitObject => (HitCircle)base.HitObject;
 
+        private readonly HitCirclePiece circlePiece;
+
         public HitCirclePlacementBlueprint()
             : base(new HitCircle())
         {
-            InternalChild = new HitCirclePiece(HitObject);
+            InternalChild = circlePiece = new HitCirclePiece();
         }
 
-        protected override void LoadComplete()
+        protected override void Update()
         {
-            base.LoadComplete();
+            base.Update();
 
-            // Fixes a 1-frame position discrepancy due to the first mouse move event happening in the next frame
+            circlePiece.UpdateFrom(HitObject);
-            HitObject.Position = Parent?.ToLocalSpace(GetContainingInputManager().CurrentState.Mouse.Position) ?? Vector2.Zero;
         }
 
         protected override bool OnClick(ClickEvent e)
         {
-            HitObject.StartTime = EditorClock.CurrentTime;
             EndPlacement();
             return true;
         }
 
-        protected override bool OnMouseMove(MouseMoveEvent e)
+        public override void UpdatePosition(Vector2 screenSpacePosition)
         {
-            HitObject.Position = e.MousePosition;
+            HitObject.Position = ToLocalSpace(screenSpacePosition);
-            return true;
         }
     }
 }

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

@@ -1,18 +1,35 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using osu.Framework.Graphics.Primitives;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles
 {
-    public class HitCircleSelectionBlueprint : OsuSelectionBlueprint
+    public class HitCircleSelectionBlueprint : OsuSelectionBlueprint<HitCircle>
     {
-        public HitCircleSelectionBlueprint(DrawableHitCircle hitCircle)
+        protected new DrawableHitCircle DrawableObject => (DrawableHitCircle)base.DrawableObject;
-            : base(hitCircle)
+
+        protected readonly HitCirclePiece CirclePiece;
+
+        public HitCircleSelectionBlueprint(DrawableHitCircle drawableCircle)
+            : base(drawableCircle)
         {
-            InternalChild = new HitCirclePiece((HitCircle)hitCircle.HitObject);
+            InternalChild = CirclePiece = new HitCirclePiece();
-        }
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            CirclePiece.UpdateFrom(HitObject);
+        }
+
+        public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => DrawableObject.HitArea.ReceivePositionalInputAt(screenSpacePos);
+
+        public override Quad SelectionQuad => DrawableObject.HitArea.ScreenSpaceDrawQuad;
     }
 }

osu.Game.Rulesets.Osu/Edit/Blueprints/HitObjectPiece.cs

@@ -1,36 +0,0 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
-// See the LICENCE file in the repository root for full licence text.
-
-using osu.Framework.Allocation;
-using osu.Framework.Bindables;
-using osu.Framework.Graphics.Containers;
-using osu.Game.Rulesets.Osu.Objects;
-using osuTK;
-
-namespace osu.Game.Rulesets.Osu.Edit.Blueprints
-{
-    /// <summary>
-    /// A piece of a blueprint which responds to changes in the state of a <see cref="OsuHitObject"/>.
-    /// </summary>
-    public abstract class HitObjectPiece : CompositeDrawable
-    {
-        protected readonly IBindable<Vector2> PositionBindable = new Bindable<Vector2>();
-        protected readonly IBindable<int> StackHeightBindable = new Bindable<int>();
-        protected readonly IBindable<float> ScaleBindable = new Bindable<float>();
-
-        private readonly OsuHitObject hitObject;
-
-        protected HitObjectPiece(OsuHitObject hitObject)
-        {
-            this.hitObject = hitObject;
-        }
-
-        [BackgroundDependencyLoader]
-        private void load()
-        {
-            PositionBindable.BindTo(hitObject.PositionBindable);
-            StackHeightBindable.BindTo(hitObject.StackHeightBindable);
-            ScaleBindable.BindTo(hitObject.ScaleBindable);
-        }
-    }
-}

osu.Game.Rulesets.Osu/Edit/Blueprints/OsuSelectionBlueprint.cs

@@ -7,12 +7,13 @@ using osu.Game.Rulesets.Osu.Objects;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints
 {
-    public class OsuSelectionBlueprint : SelectionBlueprint
+    public abstract class OsuSelectionBlueprint<T> : SelectionBlueprint
+        where T : OsuHitObject
     {
-        protected OsuHitObject OsuObject => (OsuHitObject)HitObject.HitObject;
+        protected T HitObject => (T)DrawableObject.HitObject;
 
-        public OsuSelectionBlueprint(DrawableHitObject hitObject)
+        protected OsuSelectionBlueprint(DrawableHitObject drawableObject)
-            : base(hitObject)
+            : base(drawableObject)
         {
         }
     }

osu.Game.Rulesets.Osu/Edit/Blueprints/SliderPiece.cs

@@ -1,32 +0,0 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
-// See the LICENCE file in the repository root for full licence text.
-
-using osu.Framework.Allocation;
-using osu.Framework.Bindables;
-using osu.Game.Rulesets.Objects;
-using osu.Game.Rulesets.Osu.Objects;
-
-namespace osu.Game.Rulesets.Osu.Edit.Blueprints
-{
-    /// <summary>
-    /// A piece of a blueprint which responds to changes in the state of a <see cref="Slider"/>.
-    /// </summary>
-    public abstract class SliderPiece : HitObjectPiece
-    {
-        protected readonly IBindable<SliderPath> PathBindable = new Bindable<SliderPath>();
-
-        private readonly Slider slider;
-
-        protected SliderPiece(Slider slider)
-            : base(slider)
-        {
-            this.slider = slider;
-        }
-
-        [BackgroundDependencyLoader]
-        private void load()
-        {
-            PathBindable.BindTo(slider.PathBindable);
-        }
-    }
-}

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

@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -8,14 +9,15 @@ using osu.Framework.Graphics.Lines;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.Events;
 using osu.Game.Graphics;
-using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu.Objects;
 using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
 {
-    public class PathControlPointPiece : CompositeDrawable
+    public class PathControlPointPiece : BlueprintPiece<Slider>
     {
+        public Action<Vector2[]> ControlPointsChanged;
+
         private readonly Slider slider;
         private readonly int index;
 
@@ -96,7 +98,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             if (isSegmentSeparatorWithPrevious)
                 newControlPoints[index - 1] = newControlPoints[index];
 
-            slider.Path = new SliderPath(slider.Path.Type, newControlPoints);
+            ControlPointsChanged?.Invoke(newControlPoints);
 
             return true;
         }

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

@@ -1,37 +1,35 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using osu.Framework.Allocation;
+using System;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Rulesets.Osu.Objects;
+using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
 {
-    public class PathControlPointVisualiser : SliderPiece
+    public class PathControlPointVisualiser : CompositeDrawable
     {
+        public Action<Vector2[]> ControlPointsChanged;
+
         private readonly Slider slider;
 
         private readonly Container<PathControlPointPiece> pieces;
 
         public PathControlPointVisualiser(Slider slider)
-            : base(slider)
         {
             this.slider = slider;
 
             InternalChild = pieces = new Container<PathControlPointPiece> { RelativeSizeAxes = Axes.Both };
         }
 
-        [BackgroundDependencyLoader]
+        protected override void Update()
-        private void load()
         {
-            PathBindable.BindValueChanged(_ => updatePathControlPoints(), true);
+            base.Update();
-        }
 
-        private void updatePathControlPoints()
-        {
             while (slider.Path.ControlPoints.Length > pieces.Count)
-                pieces.Add(new PathControlPointPiece(slider, pieces.Count));
+                pieces.Add(new PathControlPointPiece(slider, pieces.Count) { ControlPointsChanged = c => ControlPointsChanged?.Invoke(c) });
             while (slider.Path.ControlPoints.Length < pieces.Count)
                 pieces.Remove(pieces[pieces.Count - 1]);
         }

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

@@ -11,19 +11,15 @@ using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
 {
-    public class SliderBodyPiece : SliderPiece
+    public class SliderBodyPiece : BlueprintPiece<Slider>
     {
-        private readonly Slider slider;
         private readonly ManualSliderBody body;
 
-        public SliderBodyPiece(Slider slider)
+        public SliderBodyPiece()
-            : base(slider)
         {
-            this.slider = slider;
-
             InternalChild = body = new ManualSliderBody
             {
-                AccentColour = Color4.Transparent,
+                AccentColour = Color4.Transparent
             };
         }
 
@@ -31,19 +27,16 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
         private void load(OsuColour colours)
         {
             body.BorderColour = colours.Yellow;
-
-            PositionBindable.BindValueChanged(_ => updatePosition(), true);
-            ScaleBindable.BindValueChanged(scale => body.PathRadius = scale.NewValue * OsuHitObject.OBJECT_RADIUS, true);
         }
 
-        private void updatePosition() => Position = slider.StackedPosition;
+        public override void UpdateFrom(Slider hitObject)
-
-        protected override void Update()
         {
-            base.Update();
+            base.UpdateFrom(hitObject);
+
+            body.PathRadius = hitObject.Scale * OsuHitObject.OBJECT_RADIUS;
 
             var vertices = new List<Vector2>();
-            slider.Path.GetPathToProgress(vertices, 0, 1);
+            hitObject.Path.GetPathToProgress(vertices, 0, 1);
 
             body.SetVertices(vertices);
 

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

@@ -1,47 +0,0 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
-// See the LICENCE file in the repository root for full licence text.
-
-using osu.Framework.Allocation;
-using osu.Framework.Bindables;
-using osu.Game.Rulesets.Objects;
-using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components;
-using osu.Game.Rulesets.Osu.Objects;
-
-namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
-{
-    public class SliderCirclePiece : HitCirclePiece
-    {
-        private readonly IBindable<SliderPath> pathBindable = new Bindable<SliderPath>();
-
-        private readonly Slider slider;
-        private readonly SliderPosition position;
-
-        public SliderCirclePiece(Slider slider, SliderPosition position)
-            : base(slider.HeadCircle)
-        {
-            this.slider = slider;
-            this.position = position;
-        }
-
-        [BackgroundDependencyLoader]
-        private void load()
-        {
-            pathBindable.BindTo(slider.PathBindable);
-            pathBindable.BindValueChanged(_ => UpdatePosition(), true);
-        }
-
-        protected override void UpdatePosition()
-        {
-            switch (position)
-            {
-                case SliderPosition.Start:
-                    Position = slider.StackedPosition + slider.Path.PositionAt(0);
-                    break;
-
-                case SliderPosition.End:
-                    Position = slider.StackedPosition + slider.Path.PositionAt(1);
-                    break;
-            }
-        }
-    }
-}

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

@@ -1,22 +1,34 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components;
+using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 {
-    public class SliderCircleSelectionBlueprint : OsuSelectionBlueprint
+    public class SliderCircleSelectionBlueprint : OsuSelectionBlueprint<Slider>
     {
-        public SliderCircleSelectionBlueprint(DrawableOsuHitObject hitObject, Slider slider, SliderPosition position)
+        protected readonly HitCirclePiece CirclePiece;
-            : base(hitObject)
+
+        private readonly SliderPosition position;
+
+        public SliderCircleSelectionBlueprint(DrawableSlider slider, SliderPosition position)
+            : base(slider)
         {
-            InternalChild = new SliderCirclePiece(slider, position);
+            this.position = position;
+            InternalChild = CirclePiece = new HitCirclePiece();
 
             Select();
         }
 
+        protected override void Update()
+        {
+            base.Update();
+
+            CirclePiece.UpdateFrom(position == SliderPosition.Start ? HitObject.HeadCircle : HitObject.TailCircle);
+        }
+
         // 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 HandlePositionalInput => false;
     }

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

@@ -6,11 +6,13 @@ using System.Linq;
 using osu.Framework.Allocation;
 using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics;
+using osu.Framework.Input;
 using osu.Framework.Input.Events;
 using osu.Game.Graphics;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components;
 using osuTK;
 using osuTK.Input;
@@ -21,11 +23,19 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
     {
         public new Objects.Slider HitObject => (Objects.Slider)base.HitObject;
 
+        private SliderBodyPiece bodyPiece;
+        private HitCirclePiece headCirclePiece;
+        private HitCirclePiece tailCirclePiece;
+
         private readonly List<Segment> segments = new List<Segment>();
         private Vector2 cursor;
+        private InputManager inputManager;
 
         private PlacementState state;
 
+        [Resolved(CanBeNull = true)]
+        private HitObjectComposer composer { get; set; }
+
         public SliderPlacementBlueprint()
             : base(new Objects.Slider())
         {
@@ -38,10 +48,10 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         {
             InternalChildren = new Drawable[]
             {
-                new SliderBodyPiece(HitObject),
+                bodyPiece = new SliderBodyPiece(),
-                new SliderCirclePiece(HitObject, SliderPosition.Start),
+                headCirclePiece = new HitCirclePiece(),
-                new SliderCirclePiece(HitObject, SliderPosition.End),
+                tailCirclePiece = new HitCirclePiece(),
-                new PathControlPointVisualiser(HitObject),
+                new PathControlPointVisualiser(HitObject) { ControlPointsChanged = _ => updateSlider() },
             };
 
             setState(PlacementState.Initial);
@@ -50,25 +60,23 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         protected override void LoadComplete()
         {
             base.LoadComplete();
-
+            inputManager = GetContainingInputManager();
-            // Fixes a 1-frame position discrepancy due to the first mouse move event happening in the next frame
-            HitObject.Position = Parent?.ToLocalSpace(GetContainingInputManager().CurrentState.Mouse.Position) ?? Vector2.Zero;
         }
 
-        protected override bool OnMouseMove(MouseMoveEvent e)
+        public override void UpdatePosition(Vector2 screenSpacePosition)
         {
             switch (state)
             {
                 case PlacementState.Initial:
-                    HitObject.Position = e.MousePosition;
+                    HitObject.Position = ToLocalSpace(screenSpacePosition);
-                    return true;
+                    break;
 
                 case PlacementState.Body:
-                    cursor = e.MousePosition - HitObject.Position;
+                    // The given screen-space position may have been externally snapped, but the unsnapped position from the input manager
-                    return true;
+                    // is used instead since snapping control points doesn't make much sense
+                    cursor = ToLocalSpace(inputManager.CurrentState.Mouse.Position) - HitObject.Position;
+                    break;
             }
-
-            return false;
         }
 
         protected override bool OnClick(ClickEvent e)
@@ -109,8 +117,6 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         private void beginCurve()
         {
             BeginPlacement();
-
-            HitObject.StartTime = EditorClock.CurrentTime;
             setState(PlacementState.Body);
         }
 
@@ -128,8 +134,16 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 
         private void updateSlider()
         {
-            var newControlPoints = segments.SelectMany(s => s.ControlPoints).Concat(cursor.Yield()).ToArray();
+            Vector2[] newControlPoints = segments.SelectMany(s => s.ControlPoints).Concat(cursor.Yield()).ToArray();
-            HitObject.Path = new SliderPath(newControlPoints.Length > 2 ? PathType.Bezier : PathType.Linear, newControlPoints);
+
+            var unsnappedPath = new SliderPath(newControlPoints.Length > 2 ? PathType.Bezier : PathType.Linear, newControlPoints);
+            var snappedDistance = composer?.GetSnappedDistanceFromDistance(HitObject.StartTime, (float)unsnappedPath.Distance) ?? (float)unsnappedPath.Distance;
+
+            HitObject.Path = new SliderPath(unsnappedPath.Type, newControlPoints, snappedDistance);
+
+            bodyPiece.UpdateFrom(HitObject);
+            headCirclePiece.UpdateFrom(HitObject.HeadCircle);
+            tailCirclePiece.UpdateFrom(HitObject.TailCircle);
         }
 
         private void setState(PlacementState newState)

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

@@ -1,7 +1,11 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using osu.Framework.Allocation;
 using osu.Framework.Graphics;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
@@ -9,9 +13,14 @@ using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 {
-    public class SliderSelectionBlueprint : OsuSelectionBlueprint
+    public class SliderSelectionBlueprint : OsuSelectionBlueprint<Slider>
     {
-        private readonly SliderCircleSelectionBlueprint headBlueprint;
+        protected readonly SliderBodyPiece BodyPiece;
+        protected readonly SliderCircleSelectionBlueprint HeadBlueprint;
+        protected readonly SliderCircleSelectionBlueprint TailBlueprint;
+
+        [Resolved(CanBeNull = true)]
+        private HitObjectComposer composer { get; set; }
 
         public SliderSelectionBlueprint(DrawableSlider slider)
             : base(slider)
@@ -20,13 +29,32 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 
             InternalChildren = new Drawable[]
             {
-                new SliderBodyPiece(sliderObject),
+                BodyPiece = new SliderBodyPiece(),
-                headBlueprint = new SliderCircleSelectionBlueprint(slider.HeadCircle, sliderObject, SliderPosition.Start),
+                HeadBlueprint = CreateCircleSelectionBlueprint(slider, SliderPosition.Start),
-                new SliderCircleSelectionBlueprint(slider.TailCircle, sliderObject, SliderPosition.End),
+                TailBlueprint = CreateCircleSelectionBlueprint(slider, SliderPosition.End),
-                new PathControlPointVisualiser(sliderObject),
+                new PathControlPointVisualiser(sliderObject) { ControlPointsChanged = onNewControlPoints },
             };
         }
 
-        public override Vector2 SelectionPoint => headBlueprint.SelectionPoint;
+        protected override void Update()
+        {
+            base.Update();
+
+            BodyPiece.UpdateFrom(HitObject);
+        }
+
+        private void onNewControlPoints(Vector2[] controlPoints)
+        {
+            var unsnappedPath = new SliderPath(controlPoints.Length > 2 ? PathType.Bezier : PathType.Linear, controlPoints);
+            var snappedDistance = composer?.GetSnappedDistanceFromDistance(HitObject.StartTime, (float)unsnappedPath.Distance) ?? (float)unsnappedPath.Distance;
+
+            HitObject.Path = new SliderPath(unsnappedPath.Type, controlPoints, snappedDistance);
+        }
+
+        public override Vector2 SelectionPoint => HeadBlueprint.SelectionPoint;
+
+        public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => BodyPiece.ReceivePositionalInputAt(screenSpacePos);
+
+        protected virtual SliderCircleSelectionBlueprint CreateCircleSelectionBlueprint(DrawableSlider slider, SliderPosition position) => new SliderCircleSelectionBlueprint(slider, position);
     }
 }

osu.Game.Rulesets.Osu/Edit/Blueprints/Spinners/Components/SpinnerPiece.cs

@@ -12,17 +12,13 @@ using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners.Components
 {
-    public class SpinnerPiece : HitObjectPiece
+    public class SpinnerPiece : BlueprintPiece<Spinner>
     {
-        private readonly Spinner spinner;
         private readonly CircularContainer circle;
         private readonly RingPiece ring;
 
-        public SpinnerPiece(Spinner spinner)
+        public SpinnerPiece()
-            : base(spinner)
         {
-            this.spinner = spinner;
-
             Origin = Anchor.Centre;
 
             RelativeSizeAxes = Axes.Both;
@@ -44,21 +40,20 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners.Components
                     Origin = Anchor.Centre
                 }
             };
-
-            ring.Scale = new Vector2(spinner.Scale);
         }
 
         [BackgroundDependencyLoader]
         private void load(OsuColour colours)
         {
             Colour = colours.Yellow;
-
-            PositionBindable.BindValueChanged(_ => updatePosition(), true);
-            StackHeightBindable.BindValueChanged(_ => updatePosition());
-            ScaleBindable.BindValueChanged(scale => ring.Scale = new Vector2(scale.NewValue), true);
         }
 
-        private void updatePosition() => Position = spinner.Position;
+        public override void UpdateFrom(Spinner hitObject)
+        {
+            base.UpdateFrom(hitObject);
+
+            ring.Scale = new Vector2(hitObject.Scale);
+        }
 
         public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => circle.ReceivePositionalInputAt(screenSpacePos);
     }

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

@@ -7,6 +7,7 @@ using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners.Components;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.UI;
+using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners
 {
@@ -21,7 +22,14 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners
         public SpinnerPlacementBlueprint()
             : base(new Spinner { Position = OsuPlayfield.BASE_SIZE / 2 })
         {
-            InternalChild = piece = new SpinnerPiece(HitObject) { Alpha = 0.5f };
+            InternalChild = piece = new SpinnerPiece { Alpha = 0.5f };
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            piece.UpdateFrom(HitObject);
         }
 
         protected override bool OnClick(ClickEvent e)
@@ -33,8 +41,6 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners
             }
             else
             {
-                HitObject.StartTime = EditorClock.CurrentTime;
-
                 isPlacingEnd = true;
                 piece.FadeTo(1f, 150, Easing.OutQuint);
 
@@ -43,5 +49,9 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners
 
             return true;
         }
+
+        public override void UpdatePosition(Vector2 screenSpacePosition)
+        {
+        }
     }
 }

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

@@ -8,14 +8,21 @@ using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners
 {
-    public class SpinnerSelectionBlueprint : OsuSelectionBlueprint
+    public class SpinnerSelectionBlueprint : OsuSelectionBlueprint<Spinner>
     {
         private readonly SpinnerPiece piece;
 
         public SpinnerSelectionBlueprint(DrawableSpinner spinner)
             : base(spinner)
         {
-            InternalChild = piece = new SpinnerPiece((Spinner)spinner.HitObject);
+            InternalChild = piece = new SpinnerPiece();
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            piece.UpdateFrom(HitObject);
         }
 
         public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => piece.ReceivePositionalInputAt(screenSpacePos);

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

@@ -0,0 +1,17 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Screens.Edit.Compose.Components;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public class OsuDistanceSnapGrid : CircularDistanceSnapGrid
+    {
+        public OsuDistanceSnapGrid(OsuHitObject hitObject)
+            : base(hitObject, hitObject.StackedEndPosition)
+        {
+            Masking = true;
+        }
+    }
+}

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

@@ -2,10 +2,12 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Collections.Generic;
+using System.Linq;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
 using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders;
@@ -52,5 +54,31 @@ namespace osu.Game.Rulesets.Osu.Edit
 
             return base.CreateBlueprintFor(hitObject);
         }
+
+        protected override DistanceSnapGrid CreateDistanceSnapGrid(IEnumerable<HitObject> selectedHitObjects)
+        {
+            var objects = selectedHitObjects.ToList();
+
+            if (objects.Count == 0)
+            {
+                var lastObject = EditorBeatmap.HitObjects.LastOrDefault(h => h.StartTime <= EditorClock.CurrentTime);
+
+                if (lastObject == null)
+                    return null;
+
+                return new OsuDistanceSnapGrid(lastObject);
+            }
+            else
+            {
+                double minTime = objects.Min(h => h.StartTime);
+
+                var lastObject = EditorBeatmap.HitObjects.LastOrDefault(h => h.StartTime < minTime);
+
+                if (lastObject == null)
+                    return null;
+
+                return new OsuDistanceSnapGrid(lastObject);
+            }
+        }
     }
 }

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

@@ -2,8 +2,6 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Linq;
-using osu.Framework.Input.Events;
-using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Screens.Edit.Compose.Components;
 
@@ -11,7 +9,7 @@ namespace osu.Game.Rulesets.Osu.Edit
 {
     public class OsuSelectionHandler : SelectionHandler
     {
-        public override void HandleDrag(SelectionBlueprint blueprint, DragEvent dragEvent)
+        public override void HandleMovement(MoveSelectionEvent moveEvent)
         {
             foreach (var h in SelectedHitObjects.OfType<OsuHitObject>())
             {
@@ -21,10 +19,10 @@ namespace osu.Game.Rulesets.Osu.Edit
                     continue;
                 }
 
-                h.Position += dragEvent.Delta;
+                h.Position += moveEvent.InstantDelta;
             }
 
-            base.HandleDrag(blueprint, dragEvent);
+            base.HandleMovement(moveEvent);
         }
     }
 }

osu.Game.Rulesets.Osu/Mods/OsuModAutopilot.cs

@@ -25,6 +25,7 @@ namespace osu.Game.Rulesets.Osu.Mods
         public override Type[] IncompatibleMods => new[] { typeof(OsuModSpunOut), typeof(ModRelax), typeof(ModSuddenDeath), typeof(ModNoFail), typeof(ModAutoplay) };
 
         public bool AllowFail => false;
+        public bool RestartOnFail => false;
 
         private OsuInputManager inputManager;
 

osu.Game.Rulesets.Osu/Mods/OsuModHidden.cs

@@ -17,7 +17,9 @@ namespace osu.Game.Rulesets.Osu.Mods
     {
         public override string Description => @"Play with no approach circles and fading circles/sliders.";
         public override double ScoreMultiplier => 1.06;
-        public override Type[] IncompatibleMods => new[] { typeof(OsuModSpinIn) };
+
+        public override Type[] IncompatibleMods => new[] { typeof(OsuModTraceable), typeof(OsuModSpinIn) };
+
         private const double fade_in_duration_multiplier = 0.4;
         private const double fade_out_duration_multiplier = 0.3;
 

osu.Game.Rulesets.Osu/Mods/OsuModSpinIn.cs

@@ -26,7 +26,7 @@ namespace osu.Game.Rulesets.Osu.Mods
         public override double ScoreMultiplier => 1;
 
         // todo: this mod should be able to be compatible with hidden with a bit of further implementation.
-        public override Type[] IncompatibleMods => new[] { typeof(OsuModeObjectScaleTween), typeof(OsuModHidden) };
+        public override Type[] IncompatibleMods => new[] { typeof(OsuModeObjectScaleTween), typeof(OsuModHidden), typeof(OsuModTraceable) };
 
         private const int rotate_offset = 360;
         private const float rotate_starting_width = 2;

osu.Game.Rulesets.Osu/Mods/OsuModTraceable.cs

@@ -0,0 +1,73 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Linq;
+using osu.Framework.Bindables;
+using System.Collections.Generic;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Configuration;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Osu.Mods
+{
+    internal class OsuModTraceable : Mod, IReadFromConfig, IApplicableToDrawableHitObjects
+    {
+        public override string Name => "Traceable";
+        public override string Acronym => "TC";
+        public override IconUsage Icon => FontAwesome.Brands.SnapchatGhost;
+        public override ModType Type => ModType.Fun;
+        public override string Description => "Put your faith in the approach circles...";
+        public override double ScoreMultiplier => 1;
+
+        public override Type[] IncompatibleMods => new[] { typeof(OsuModHidden), typeof(OsuModSpinIn), typeof(OsuModeObjectScaleTween) };
+        private Bindable<bool> increaseFirstObjectVisibility = new Bindable<bool>();
+
+        public void ReadFromConfig(OsuConfigManager config)
+        {
+            increaseFirstObjectVisibility = config.GetBindable<bool>(OsuSetting.IncreaseFirstObjectVisibility);
+        }
+
+        public void ApplyToDrawableHitObjects(IEnumerable<DrawableHitObject> drawables)
+        {
+            foreach (var drawable in drawables.Skip(increaseFirstObjectVisibility.Value ? 1 : 0))
+                drawable.ApplyCustomUpdateState += ApplyTraceableState;
+        }
+
+        protected void ApplyTraceableState(DrawableHitObject drawable, ArmedState state)
+        {
+            if (!(drawable is DrawableOsuHitObject drawableOsu))
+                return;
+
+            var h = drawableOsu.HitObject;
+
+            switch (drawable)
+            {
+                case DrawableHitCircle circle:
+                    // we only want to see the approach circle
+                    using (circle.BeginAbsoluteSequence(h.StartTime - h.TimePreempt, true))
+                        circle.CirclePiece.Hide();
+
+                    break;
+
+                case DrawableSlider slider:
+                    slider.AccentColour.BindValueChanged(_ =>
+                    {
+                        //will trigger on skin change.
+                        slider.Body.AccentColour = slider.AccentColour.Value.Opacity(0);
+                        slider.Body.BorderColour = slider.AccentColour.Value;
+                    }, true);
+
+                    break;
+
+                case DrawableSpinner spinner:
+                    spinner.Disc.Hide();
+                    spinner.Background.Hide();
+                    break;
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Mods/OsuModeObjectScaleTween.cs

@@ -29,7 +29,7 @@ namespace osu.Game.Rulesets.Osu.Mods
 
         private Bindable<bool> increaseFirstObjectVisibility = new Bindable<bool>();
 
-        public override Type[] IncompatibleMods => new[] { typeof(OsuModSpinIn) };
+        public override Type[] IncompatibleMods => new[] { typeof(OsuModSpinIn), typeof(OsuModTraceable) };
 
         public void ReadFromConfig(OsuConfigManager config)
         {

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

@@ -18,20 +18,18 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 {
     public class DrawableHitCircle : DrawableOsuHitObject, IDrawableHitObjectWithProxiedApproach
     {
-        public ApproachCircle ApproachCircle;
+        public ApproachCircle ApproachCircle { get; }
 
         private readonly IBindable<Vector2> positionBindable = new Bindable<Vector2>();
         private readonly IBindable<int> stackHeightBindable = new Bindable<int>();
         private readonly IBindable<float> scaleBindable = new Bindable<float>();
 
-        public OsuAction? HitAction => hitArea.HitAction;
+        public OsuAction? HitAction => HitArea.HitAction;
 
+        public readonly HitReceptor HitArea;
+        public readonly SkinnableDrawable CirclePiece;
         private readonly Container scaleContainer;
 
-        private readonly HitArea hitArea;
-
-        private readonly SkinnableDrawable mainContent;
-
         public DrawableHitCircle(HitCircle h)
             : base(h)
         {
@@ -48,7 +46,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                     Anchor = Anchor.Centre,
                     Children = new Drawable[]
                     {
-                        hitArea = new HitArea
+                        HitArea = new HitReceptor
                         {
                             Hit = () =>
                             {
@@ -59,7 +57,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                                 return true;
                             },
                         },
-                        mainContent = new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.HitCircle), _ => new MainCirclePiece(HitObject.IndexInCurrentCombo)),
+                        CirclePiece = new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.HitCircle), _ => new MainCirclePiece()),
                         ApproachCircle = new ApproachCircle
                         {
                             Alpha = 0,
@@ -69,7 +67,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                 },
             };
 
-            Size = hitArea.DrawSize;
+            Size = HitArea.DrawSize;
         }
 
         [BackgroundDependencyLoader]
@@ -133,7 +131,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         {
             base.UpdateInitialTransforms();
 
-            mainContent.FadeInFromZero(HitObject.TimeFadeIn);
+            CirclePiece.FadeInFromZero(HitObject.TimeFadeIn);
 
             ApproachCircle.FadeIn(Math.Min(HitObject.TimeFadeIn * 2, HitObject.TimePreempt));
             ApproachCircle.ScaleTo(1f, HitObject.TimePreempt);
@@ -153,7 +151,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
                     Expire(true);
 
-                    hitArea.HitAction = null;
+                    HitArea.HitAction = null;
                     break;
 
                 case ArmedState.Miss:
@@ -172,7 +170,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
         public Drawable ProxiedLayer => ApproachCircle;
 
-        private class HitArea : Drawable, IKeyBindingHandler<OsuAction>
+        public class HitReceptor : Drawable, IKeyBindingHandler<OsuAction>
         {
             // IsHovered is used
             public override bool HandlePositionalInput => true;
@@ -181,7 +179,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             public OsuAction? HitAction;
 
-            public HitArea()
+            public HitReceptor()
             {
                 Size = new Vector2(OsuHitObject.OBJECT_RADIUS * 2);
 

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

@@ -1,22 +1,66 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
 using osu.Framework.Graphics;
+using osu.Game.Configuration;
 using osuTK;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Skinning;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Osu.Objects.Drawables
 {
     public class DrawableOsuJudgement : DrawableJudgement
     {
+        private SkinnableSprite lighting;
+        private Bindable<Color4> lightingColour;
+
         public DrawableOsuJudgement(JudgementResult result, DrawableHitObject judgedObject)
             : base(result, judgedObject)
         {
         }
 
+        [BackgroundDependencyLoader]
+        private void load(OsuConfigManager config)
+        {
+            if (config.Get<bool>(OsuSetting.HitLighting) && Result.Type != HitResult.Miss)
+            {
+                AddInternal(lighting = new SkinnableSprite("lighting")
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Blending = BlendingParameters.Additive,
+                    Depth = float.MaxValue
+                });
+
+                if (JudgedObject != null)
+                {
+                    lightingColour = JudgedObject.AccentColour.GetBoundCopy();
+                    lightingColour.BindValueChanged(colour => lighting.Colour = colour.NewValue, true);
+                }
+                else
+                {
+                    lighting.Colour = Color4.White;
+                }
+            }
+        }
+
+        protected override double FadeOutDelay => lighting == null ? base.FadeOutDelay : 1400;
+
         protected override void ApplyHitAnimations()
         {
+            if (lighting != null)
+            {
+                JudgementBody.Delay(FadeInDuration).FadeOut(400);
+
+                lighting.ScaleTo(0.8f).ScaleTo(1.2f, 600, Easing.Out);
+                lighting.FadeIn(200).Then().Delay(200).FadeOut(1000);
+            }
+
             JudgementText?.TransformSpacingTo(new Vector2(14, 0), 1800, Easing.OutQuint);
             base.ApplyHitAnimations();
         }

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

@@ -5,7 +5,6 @@ using osuTK;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
-using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
@@ -21,16 +20,21 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 {
     public class DrawableSlider : DrawableOsuHitObject, IDrawableHitObjectWithProxiedApproach
     {
-        private readonly Slider slider;
+        public DrawableSliderHead HeadCircle => headContainer.Child;
-        private readonly List<Drawable> components = new List<Drawable>();
+        public DrawableSliderTail TailCircle => tailContainer.Child;
-
-        public readonly DrawableHitCircle HeadCircle;
-        public readonly DrawableSliderTail TailCircle;
 
         public readonly SnakingSliderBody Body;
         public readonly SliderBall Ball;
 
+        private readonly Container<DrawableSliderHead> headContainer;
+        private readonly Container<DrawableSliderTail> tailContainer;
+        private readonly Container<DrawableSliderTick> tickContainer;
+        private readonly Container<DrawableRepeatPoint> repeatContainer;
+
+        private readonly Slider slider;
+
         private readonly IBindable<Vector2> positionBindable = new Bindable<Vector2>();
+        private readonly IBindable<int> stackHeightBindable = new Bindable<int>();
         private readonly IBindable<float> scaleBindable = new Bindable<float>();
         private readonly IBindable<SliderPath> pathBindable = new Bindable<SliderPath>();
 
@@ -44,14 +48,11 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             Position = s.StackedPosition;
 
-            Container<DrawableSliderTick> ticks;
-            Container<DrawableRepeatPoint> repeatPoints;
-
             InternalChildren = new Drawable[]
             {
                 Body = new SnakingSliderBody(s),
-                ticks = new Container<DrawableSliderTick> { RelativeSizeAxes = Axes.Both },
+                tickContainer = new Container<DrawableSliderTick> { RelativeSizeAxes = Axes.Both },
-                repeatPoints = new Container<DrawableRepeatPoint> { RelativeSizeAxes = Axes.Both },
+                repeatContainer = new Container<DrawableRepeatPoint> { RelativeSizeAxes = Axes.Both },
                 Ball = new SliderBall(s, this)
                 {
                     GetInitialHitAction = () => HeadCircle.HitAction,
@@ -60,45 +61,9 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                     AlwaysPresent = true,
                     Alpha = 0
                 },
-                HeadCircle = new DrawableSliderHead(s, s.HeadCircle)
+                headContainer = new Container<DrawableSliderHead> { RelativeSizeAxes = Axes.Both },
-                {
+                tailContainer = new Container<DrawableSliderTail> { RelativeSizeAxes = Axes.Both },
-                    OnShake = Shake
-                },
-                TailCircle = new DrawableSliderTail(s, s.TailCircle)
             };
-
-            components.Add(Body);
-            components.Add(Ball);
-
-            AddNested(HeadCircle);
-
-            AddNested(TailCircle);
-            components.Add(TailCircle);
-
-            foreach (var tick in s.NestedHitObjects.OfType<SliderTick>())
-            {
-                var drawableTick = new DrawableSliderTick(tick) { Position = tick.Position - s.Position };
-
-                ticks.Add(drawableTick);
-                components.Add(drawableTick);
-                AddNested(drawableTick);
-            }
-
-            foreach (var repeatPoint in s.NestedHitObjects.OfType<RepeatPoint>())
-            {
-                var drawableRepeatPoint = new DrawableRepeatPoint(repeatPoint, this) { Position = repeatPoint.Position - s.Position };
-
-                repeatPoints.Add(drawableRepeatPoint);
-                components.Add(drawableRepeatPoint);
-                AddNested(drawableRepeatPoint);
-            }
-        }
-
-        protected override void UpdateInitialTransforms()
-        {
-            base.UpdateInitialTransforms();
-
-            Body.FadeInFromZero(HitObject.TimeFadeIn);
         }
 
         [BackgroundDependencyLoader]
@@ -108,6 +73,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             config?.BindWith(OsuRulesetSetting.SnakingOutSliders, Body.SnakingOut);
 
             positionBindable.BindValueChanged(_ => Position = HitObject.StackedPosition);
+            stackHeightBindable.BindValueChanged(_ => Position = HitObject.StackedPosition);
             scaleBindable.BindValueChanged(scale =>
             {
                 updatePathRadius();
@@ -115,6 +81,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             });
 
             positionBindable.BindTo(HitObject.PositionBindable);
+            stackHeightBindable.BindTo(HitObject.StackHeightBindable);
             scaleBindable.BindTo(HitObject.ScaleBindable);
             pathBindable.BindTo(slider.PathBindable);
 
@@ -129,6 +96,67 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             }, true);
         }
 
+        protected override void AddNestedHitObject(DrawableHitObject hitObject)
+        {
+            base.AddNestedHitObject(hitObject);
+
+            switch (hitObject)
+            {
+                case DrawableSliderHead head:
+                    headContainer.Child = head;
+                    break;
+
+                case DrawableSliderTail tail:
+                    tailContainer.Child = tail;
+                    break;
+
+                case DrawableSliderTick tick:
+                    tickContainer.Add(tick);
+                    break;
+
+                case DrawableRepeatPoint repeat:
+                    repeatContainer.Add(repeat);
+                    break;
+            }
+        }
+
+        protected override void ClearNestedHitObjects()
+        {
+            base.ClearNestedHitObjects();
+
+            headContainer.Clear();
+            tailContainer.Clear();
+            repeatContainer.Clear();
+            tickContainer.Clear();
+        }
+
+        protected override DrawableHitObject CreateNestedHitObject(HitObject hitObject)
+        {
+            switch (hitObject)
+            {
+                case SliderTailCircle tail:
+                    return new DrawableSliderTail(slider, tail);
+
+                case HitCircle head:
+                    return new DrawableSliderHead(slider, head) { OnShake = Shake };
+
+                case SliderTick tick:
+                    return new DrawableSliderTick(tick) { Position = tick.Position - slider.Position };
+
+                case RepeatPoint repeat:
+                    return new DrawableRepeatPoint(repeat, this) { Position = repeat.Position - slider.Position };
+            }
+
+            return base.CreateNestedHitObject(hitObject);
+        }
+
+        protected override void UpdateInitialTransforms()
+        {
+            base.UpdateInitialTransforms();
+
+            Body.FadeInFromZero(HitObject.TimeFadeIn);
+        }
+
         public readonly Bindable<bool> Tracking = new Bindable<bool>();
 
         protected override void Update()
@@ -139,9 +167,14 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             double completionProgress = MathHelper.Clamp((Time.Current - slider.StartTime) / slider.Duration, 0, 1);
 
-            foreach (var c in components.OfType<ISliderProgress>()) c.UpdateProgress(completionProgress);
+            Ball.UpdateProgress(completionProgress);
-            foreach (var c in components.OfType<ITrackSnaking>()) c.UpdateSnakingPosition(slider.Path.PositionAt(Body.SnakedStart ?? 0), slider.Path.PositionAt(Body.SnakedEnd ?? 0));
+            Body.UpdateProgress(completionProgress);
-            foreach (var t in components.OfType<IRequireTracking>()) t.Tracking = Ball.Tracking;
+
+            foreach (DrawableHitObject hitObject in NestedHitObjects)
+            {
+                if (hitObject is ITrackSnaking s) s.UpdateSnakingPosition(slider.Path.PositionAt(Body.SnakedStart ?? 0), slider.Path.PositionAt(Body.SnakedEnd ?? 0));
+                if (hitObject is IRequireTracking t) t.Tracking = Ball.Tracking;
+            }
 
             Size = Body.Size;
             OriginPosition = Body.PathOffset;
@@ -163,9 +196,9 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
         private float sliderPathRadius;
 
-        protected override void SkinChanged(ISkinSource skin, bool allowFallback)
+        protected override void ApplySkin(ISkinSource skin, bool allowFallback)
         {
-            base.SkinChanged(skin, allowFallback);
+            base.ApplySkin(skin, allowFallback);
 
             Body.BorderSize = skin.GetConfig<OsuSkinConfiguration, float>(OsuSkinConfiguration.SliderBorderSize)?.Value ?? SliderBody.DEFAULT_BORDER_SIZE;
             sliderPathRadius = skin.GetConfig<OsuSkinConfiguration, float>(OsuSkinConfiguration.SliderPathRadius)?.Value ?? OsuHitObject.OBJECT_RADIUS;
@@ -173,6 +206,9 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             Body.AccentColour = skin.GetConfig<OsuSkinColour, Color4>(OsuSkinColour.SliderTrackOverride)?.Value ?? AccentColour.Value;
             Body.BorderColour = skin.GetConfig<OsuSkinColour, Color4>(OsuSkinColour.SliderBorder)?.Value ?? Color4.White;
+
+            bool allowBallTint = skin.GetConfig<OsuSkinConfiguration, bool>(OsuSkinConfiguration.AllowSliderBallTint)?.Value ?? false;
+            Ball.Colour = allowBallTint ? AccentColour.Value : Color4.White;
         }
 
         private void updatePathRadius() => Body.PathRadius = slider.Scale * sliderPathRadius;
@@ -184,7 +220,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             ApplyResult(r =>
             {
-                var judgementsCount = NestedHitObjects.Count();
+                var judgementsCount = NestedHitObjects.Count;
                 var judgementsHit = NestedHitObjects.Count(h => h.IsHit);
 
                 var hitFraction = (double)judgementsHit / judgementsCount;
@@ -225,7 +261,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             }
         }
 
-        public Drawable ProxiedLayer => HeadCircle.ApproachCircle;
+        public Drawable ProxiedLayer => HeadCircle.ProxiedLayer;
 
         public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => Body.ReceivePositionalInputAt(screenSpacePos);
     }

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

@@ -40,6 +40,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             positionBindable.BindValueChanged(_ => updatePosition());
             pathBindable.BindValueChanged(_ => updatePosition(), true);
+
+            // TODO: This has no drawable content. Support for skins should be added.
         }
 
         protected override void CheckForResult(bool userTriggered, double timeOffset)