Fix release compile.

Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

.appveyor.yml

@@ -1,52 +0,0 @@
-environment:
-  sonarqubekey:
-    secure: h3llq6OeVa94hJ71UOEQSQDq75vFt+doso7iFry0gvt/fFcyeonY9wY+ETOIVITK
-  global:
-    PYTHONUNBUFFERED: True
-    HEADLESS: 1  # For the unit tests.
-
-version: 0.1.0.{build}
-pull_requests:
-  do_not_increment_build_number: true
-
-image: Visual Studio 2019
-install:
-- ps: >
-    if (-Not $env:APPVEYOR_PULL_REQUEST_NUMBER -And $env:APPVEYOR_REPO_BRANCH -Eq "master")
-    {
-      cinst msbuild-sonarqube-runner;
-    }
-
-before_build:
-- cmd: py -3.5 -m pip install --user requests
-- cmd: git submodule update --init --recursive
-- ps: >
-    if (-Not $env:APPVEYOR_PULL_REQUEST_NUMBER -And $env:APPVEYOR_REPO_BRANCH -Eq "master")
-    {
-      SonarScanner.MSBuild.exe begin /k:"ss14" /d:"sonar.host.url=https://sonarcloud.io" /d:"sonar.login=$env:sonarqubekey" /o:"space-wizards" /d:sonar.cs.nunit.reportsPaths="$(Get-Location)\nunitTestResult.xml";
-    }
-
-platform: x64
-configuration: Debug
-
-cache:
-- packages -> **\*.csproj
-- Dependencies
-
-build:
-  project: RobustToolbox.sln
-  parallel: false
-  verbosity: minimal
-
-build_script:
-- ps: dotnet build RobustToolbox.sln /p:AppVeyor=yes
-
-test_script:
-- ps: dotnet test Robust.UnitTesting/Robust.UnitTesting.csproj
-
-after_test:
-- ps: >
-    if (-Not $env:APPVEYOR_PULL_REQUEST_NUMBER -And $env:APPVEYOR_REPO_BRANCH -Eq "master")
-    {
-      SonarScanner.MSBuild.exe end /d:"sonar.login=$env:sonarqubekey";
-    }

.github/workflows/build-test.yml

@@ -22,7 +22,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.100
+        dotnet-version: 6.0.100
     - name: Install dependencies
       run: dotnet restore
     - name: Build

.github/workflows/codeql-analysis.yml

@@ -42,7 +42,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.100
+        dotnet-version: 6.0.100
 
     - name: Build
       run: dotnet build

.github/workflows/publish-client.yml

@@ -23,7 +23,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.100
+        dotnet-version: 6.0.100
 
     - name: Package client
       run: Tools/package_client_build.py -p windows mac linux

.github/workflows/test-content.yml

@@ -21,7 +21,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.100
+        dotnet-version: 6.0.100
     - name: Disable submodule autoupdate
       run: touch BuildChecker/DISABLE_SUBMODULE_AUTOUPDATE
 
@@ -38,4 +38,4 @@ jobs:
     - name: Content.Tests
       run: dotnet test --no-build Content.Tests/Content.Tests.csproj -v n
     - name: Content.IntegrationTests
-      run: COMPlus_gcServer=1 dotnet test --no-build Content.IntegrationTests/Content.IntegrationTests.csproj -v n
+      run: COMPlus_gcServer=1 dotnet test --no-build Content.IntegrationTests/Content.IntegrationTests.csproj -v n

.gitmodules

@@ -18,4 +18,4 @@
 	url = https://github.com/space-wizards/Linguini
 [submodule "cefglue"]
 	path = cefglue
-	url = https://gitlab.com/xiliumhq/chromiumembedded/cefglue/
+	url = https://github.com/space-wizards/cefglue.git

Lidgren.Network/Lidgren.Network.csproj

@@ -3,10 +3,10 @@
   <PropertyGroup>
     <TargetFramework>netcoreapp3.1</TargetFramework>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
-    <DefineConstants Condition="'$(TargetFramework)' == 'netstandard2.1' or '$(TargetFramework)' == 'netcoreapp3.1'">$(DefineConstants);HAS_FULL_SPAN</DefineConstants>
     <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
     <DefaultItemExcludes>Lidgren.Network/**/*</DefaultItemExcludes>
     <DefineConstants>$(DefineConstants);USE_RELEASE_STATISTICS</DefineConstants>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
   <ItemGroup>

MSBuild/Robust.Engine.props

@@ -1,8 +1,8 @@
 <Project>
     <!-- Engine-specific properties. Content should not use this file. -->
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
-        <LangVersion>9</LangVersion>
+        <TargetFramework>net6.0</TargetFramework>
+        <LangVersion>10</LangVersion>
         <Nullable>enable</Nullable>
         <WarningsAsErrors>nullable</WarningsAsErrors>
     </PropertyGroup>

MSBuild/Robust.Properties.targets

@@ -26,7 +26,7 @@
     <TargetOS Condition="'$(TargetOS)' == ''">$(ActualOS)</TargetOS>
     <Python>python3</Python>
     <Python Condition="'$(ActualOS)' == 'Windows'">py -3</Python>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
     <EnableClientScripting>True</EnableClientScripting>
     <!-- Client scripting is disabled on full release builds for security and size reasons. -->
     <EnableClientScripting Condition="'$(FullRelease)' == 'True'">False</EnableClientScripting>

Resources/Shaders/Internal/fov-lighting.swsl

@@ -2,29 +2,15 @@ preset raw;
 
 #include "/Shaders/Internal/shadow_cast_shared.swsl"
 
+#include "/Shaders/Internal/fov_shared.swsl"
+
 const highp float g_MinVariance = 0.0;
 
-varying highp vec2 worldPosition;
-
-// Center of the FOV, in world coordinates.
-uniform highp vec2 center;
-
-void vertex()
-{
-    highp vec3 transformed = modelMatrix * vec3(VERTEX, 1.0);
-    worldPosition = transformed.xy;
-    transformed = projectionMatrix * viewMatrix * transformed;
-
-    VERTEX = transformed.xy;
-}
-
 void fragment()
 {
-    highp vec2 diff = worldPosition - center;
+    highp float ourDist = length(worldSpaceDiff);
 
-    highp float ourDist = length(diff);
-
-    highp vec2 occlDist = occludeDepth(diff, TEXTURE, 0.25);
+    highp vec2 occlDist = occludeDepth(worldSpaceDiff, TEXTURE, 0.25);
 
     highp float occlusion = ChebyshevUpperBound(occlDist, ourDist);
 

Resources/Shaders/Internal/fov.swsl

@@ -2,32 +2,18 @@ preset raw;
 
 #include "/Shaders/Internal/shadow_cast_shared.swsl"
 
+#include "/Shaders/Internal/fov_shared.swsl"
+
 const highp float g_MinVariance = 0.0;
 
-varying highp vec2 worldPosition;
-
-// Center of the FOV, in world coordinates.
-uniform highp vec2 center;
-
-void vertex()
-{
-    highp vec3 transformed = modelMatrix * vec3(VERTEX, 1.0);
-    worldPosition = transformed.xy;
-    transformed = projectionMatrix * viewMatrix * transformed;
-
-    VERTEX = transformed.xy;
-}
-
 void fragment()
 {
-    highp vec2 diff = worldPosition - center;
+    highp float ourDist = length(worldSpaceDiff);
 
-    highp float ourDist = length(diff);
-
-    highp float occlDist = occludeDepth(diff, TEXTURE, 0.75).r;
+    highp float occlDist = occludeDepth(worldSpaceDiff, TEXTURE, 0.75).r;
 
     // *Very* simple biased shadow check for FOV.
-    if (!doesOcclude(diff, TEXTURE, 0.75, -0.75/32.0))
+    if (!doesOcclude(worldSpaceDiff, TEXTURE, 0.75, -0.75/32.0))
     {
         discard;
     }

Resources/Shaders/Internal/fov_shared.swsl

@@ -0,0 +1,16 @@
+// Shared between fov-lighting.swsl and fov.swsl, which both use the Clyde quad,
+//  manually transformed into clip-space to cover the entire viewport
+
+// World-space position offset from centre to pixel.
+varying highp vec2 worldSpaceDiff;
+
+// Inverted transformation matrix from clip coordinates to difference coordinates.
+uniform highp mat3 clipToDiff;
+
+void vertex()
+{
+    // Convert quad-space (0.0 to 1.0) to clip-space (-1.0 to 1.0)
+    VERTEX = (VERTEX.xy - 0.5) * 2.0;
+    worldSpaceDiff = (clipToDiff * vec3(VERTEX, 1.0)).xy;
+}
+

Resources/Shaders/Internal/light_shared.swsl

@@ -40,7 +40,7 @@ void fragment()
     highp vec2 diff = worldPosition - lightCenter;
 
     // Totally not hacky PCF on top of VSM.
-    highp float occlusion = createOcclusion(diff);
+    highp float occlusion = lightIndex < 0.0 ? 1.0 : createOcclusion(diff);
 
     if (occlusion == 0.0)
     {

Robust.Analyzers/FriendAnalyzer.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
@@ -92,7 +93,7 @@ namespace Robust.Analyzers
                             continue;
 
                         // If we find that the containing class is specified in the attribute, return! All is good.
-                        if (SymbolEqualityComparer.Default.Equals(containingType, t))
+                        if (InheritsFromOrEquals(containingType, t))
                             return;
                     }
 
@@ -103,5 +104,26 @@ namespace Robust.Analyzers
                 }
             }
         }
+
+        private bool InheritsFromOrEquals(INamedTypeSymbol type, INamedTypeSymbol baseType)
+        {
+            foreach (var otherType in GetBaseTypesAndThis(type))
+            {
+                if (SymbolEqualityComparer.Default.Equals(otherType, baseType))
+                    return true;
+            }
+
+            return false;
+        }
+
+        private IEnumerable<INamedTypeSymbol> GetBaseTypesAndThis(INamedTypeSymbol namedType)
+        {
+            var current = namedType;
+            while (current != null)
+            {
+                yield return current;
+                current = current.BaseType;
+            }
+        }
     }
 }

Robust.Client.CEF/BrowserControl.cs

@@ -1,593 +0,0 @@
-using System;
-using System.Collections.Generic;
-using Robust.Client.Graphics;
-using Robust.Client.Input;
-using Robust.Client.UserInterface;
-using Robust.Shared.IoC;
-using Robust.Shared.Log;
-using Robust.Shared.Maths;
-using Robust.Shared.Utility;
-using Robust.Shared.ViewVariables;
-using SixLabors.ImageSharp.PixelFormats;
-using Xilium.CefGlue;
-using static Robust.Client.CEF.CefKeyCodes;
-using static Robust.Client.CEF.CefKeyCodes.ChromiumKeyboardCode;
-using static Robust.Client.Input.Keyboard;
-
-namespace Robust.Client.CEF
-{
-    // Funny browser control to integrate in UI.
-    public class BrowserControl : Control, IBrowserControl, IRawInputControl
-    {
-        private const int ScrollSpeed = 50;
-
-        [Dependency] private readonly IClyde _clyde = default!;
-        [Dependency] private readonly IInputManager _inputMgr = default!;
-        [Dependency] private readonly CefManager _cef = default!;
-
-        private RobustRequestHandler _requestHandler = new RobustRequestHandler(Logger.GetSawmill("root"));
-        private LiveData? _data;
-        private string _startUrl = "about:blank";
-
-        [ViewVariables(VVAccess.ReadWrite)]
-        public string Url
-        {
-            get => _data == null ? _startUrl : _data.Browser.GetMainFrame().Url;
-            set
-            {
-                if (_data == null)
-                    _startUrl = value;
-                else
-                    _data.Browser.GetMainFrame().LoadUrl(value);
-            }
-        }
-
-        [ViewVariables] public bool IsLoading => _data?.Browser.IsLoading ?? false;
-
-        private readonly Dictionary<Key, ChromiumKeyboardCode> _keyMap = new()
-        {
-            [Key.A] = VKEY_A,
-            [Key.B] = VKEY_B,
-            [Key.C] = VKEY_C,
-            [Key.D] = VKEY_D,
-            [Key.E] = VKEY_E,
-            [Key.F] = VKEY_F,
-            [Key.G] = VKEY_G,
-            [Key.H] = VKEY_H,
-            [Key.I] = VKEY_I,
-            [Key.J] = VKEY_J,
-            [Key.K] = VKEY_K,
-            [Key.L] = VKEY_L,
-            [Key.M] = VKEY_M,
-            [Key.N] = VKEY_N,
-            [Key.O] = VKEY_O,
-            [Key.P] = VKEY_P,
-            [Key.Q] = VKEY_Q,
-            [Key.R] = VKEY_R,
-            [Key.S] = VKEY_S,
-            [Key.T] = VKEY_T,
-            [Key.U] = VKEY_U,
-            [Key.V] = VKEY_V,
-            [Key.W] = VKEY_W,
-            [Key.X] = VKEY_X,
-            [Key.Y] = VKEY_Y,
-            [Key.Z] = VKEY_Z,
-            [Key.Num0] = VKEY_0,
-            [Key.Num1] = VKEY_1,
-            [Key.Num2] = VKEY_2,
-            [Key.Num3] = VKEY_3,
-            [Key.Num4] = VKEY_4,
-            [Key.Num5] = VKEY_5,
-            [Key.Num6] = VKEY_6,
-            [Key.Num7] = VKEY_7,
-            [Key.Num8] = VKEY_8,
-            [Key.Num9] = VKEY_9,
-            [Key.NumpadNum0] = VKEY_NUMPAD0,
-            [Key.NumpadNum1] = VKEY_NUMPAD1,
-            [Key.NumpadNum2] = VKEY_NUMPAD2,
-            [Key.NumpadNum3] = VKEY_NUMPAD3,
-            [Key.NumpadNum4] = VKEY_NUMPAD4,
-            [Key.NumpadNum5] = VKEY_NUMPAD5,
-            [Key.NumpadNum6] = VKEY_NUMPAD6,
-            [Key.NumpadNum7] = VKEY_NUMPAD7,
-            [Key.NumpadNum8] = VKEY_NUMPAD8,
-            [Key.NumpadNum9] = VKEY_NUMPAD9,
-            [Key.Escape] = VKEY_ESCAPE,
-            [Key.Control] = VKEY_CONTROL,
-            [Key.Shift] = VKEY_SHIFT,
-            [Key.Alt] = VKEY_MENU,
-            [Key.LSystem] = VKEY_LWIN,
-            [Key.RSystem] = VKEY_RWIN,
-            [Key.LBracket] = VKEY_OEM_4,
-            [Key.RBracket] = VKEY_OEM_6,
-            [Key.SemiColon] = VKEY_OEM_1,
-            [Key.Comma] = VKEY_OEM_COMMA,
-            [Key.Period] = VKEY_OEM_PERIOD,
-            [Key.Apostrophe] = VKEY_OEM_7,
-            [Key.Slash] = VKEY_OEM_2,
-            [Key.BackSlash] = VKEY_OEM_5,
-            [Key.Tilde] = VKEY_OEM_3,
-            [Key.Equal] = VKEY_OEM_PLUS,
-            [Key.Space] = VKEY_SPACE,
-            [Key.Return] = VKEY_RETURN,
-            [Key.BackSpace] = VKEY_BACK,
-            [Key.Tab] = VKEY_TAB,
-            [Key.PageUp] = VKEY_PRIOR,
-            [Key.PageDown] = VKEY_NEXT,
-            [Key.End] = VKEY_END,
-            [Key.Home] = VKEY_HOME,
-            [Key.Insert] = VKEY_INSERT,
-            [Key.Delete] = VKEY_DELETE,
-            [Key.Minus] = VKEY_OEM_MINUS,
-            [Key.NumpadAdd] = VKEY_ADD,
-            [Key.NumpadSubtract] = VKEY_SUBTRACT,
-            [Key.NumpadDivide] = VKEY_DIVIDE,
-            [Key.NumpadMultiply] = VKEY_MULTIPLY,
-            [Key.NumpadDecimal] = VKEY_DECIMAL,
-            [Key.Left] = VKEY_LEFT,
-            [Key.Right] = VKEY_RIGHT,
-            [Key.Up] = VKEY_UP,
-            [Key.Down] = VKEY_DOWN,
-            [Key.F1] = VKEY_F1,
-            [Key.F2] = VKEY_F2,
-            [Key.F3] = VKEY_F3,
-            [Key.F4] = VKEY_F4,
-            [Key.F5] = VKEY_F5,
-            [Key.F6] = VKEY_F6,
-            [Key.F7] = VKEY_F7,
-            [Key.F8] = VKEY_F8,
-            [Key.F9] = VKEY_F9,
-            [Key.F10] = VKEY_F10,
-            [Key.F11] = VKEY_F11,
-            [Key.F12] = VKEY_F12,
-            [Key.F13] = VKEY_F13,
-            [Key.F14] = VKEY_F14,
-            [Key.F15] = VKEY_F15,
-            [Key.Pause] = VKEY_PAUSE,
-        };
-
-        public BrowserControl()
-        {
-            CanKeyboardFocus = true;
-            KeyboardFocusOnClick = true;
-            MouseFilter = MouseFilterMode.Stop;
-
-            IoCManager.InjectDependencies(this);
-        }
-
-        protected override void EnteredTree()
-        {
-            base.EnteredTree();
-
-            _cef.CheckInitialized();
-
-            DebugTools.AssertNull(_data);
-
-            // A funny render handler that will allow us to render to the control.
-            var renderer = new ControlRenderHandler(this);
-
-            // A funny web cef client. This can actually be shared by multiple browsers, but I'm not sure how the
-            // rendering would work in that case? TODO CEF: Investigate a way to share the web client?
-            var client = new RobustCefClient(renderer, _requestHandler, new RobustLoadHandler());
-
-            var info = CefWindowInfo.Create();
-
-            // FUNFACT: If you DO NOT set these below and set info.Width/info.Height instead, you get an external window
-            // Good to know, huh? Setup is the same, except you can pass a dummy render handler to the CEF client.
-            info.SetAsWindowless(IntPtr.Zero, false); // TODO CEF: Pass parent handle?
-            info.WindowlessRenderingEnabled = true;
-
-            var settings = new CefBrowserSettings()
-            {
-                WindowlessFrameRate = 60
-            };
-
-            // Create the web browser! And by default, we go to about:blank.
-            var browser = CefBrowserHost.CreateBrowserSync(info, client, settings, _startUrl);
-
-            var texture = _clyde.CreateBlankTexture<Bgra32>(Vector2i.One);
-
-            _data = new LiveData(texture, client, browser, renderer);
-        }
-
-        protected override void ExitedTree()
-        {
-            base.ExitedTree();
-
-            DebugTools.AssertNotNull(_data);
-
-            _data!.Texture.Dispose();
-            _data.Browser.GetHost().CloseBrowser(true);
-            _data = null;
-        }
-
-        protected internal override void MouseMove(GUIMouseMoveEventArgs args)
-        {
-            base.MouseMove(args);
-
-            if (_data == null)
-                return;
-
-            // Logger.Debug();
-            var modifiers = CalcMouseModifiers();
-            var mouseEvent = new CefMouseEvent(
-                (int) args.RelativePosition.X, (int) args.RelativePosition.Y,
-                modifiers);
-
-            _data.Browser.GetHost().SendMouseMoveEvent(mouseEvent, false);
-        }
-
-        protected internal override void MouseExited()
-        {
-            base.MouseExited();
-
-            if (_data == null)
-                return;
-
-            var modifiers = CalcMouseModifiers();
-
-            _data.Browser.GetHost().SendMouseMoveEvent(new CefMouseEvent(0, 0, modifiers), true);
-        }
-
-        protected internal override void MouseWheel(GUIMouseWheelEventArgs args)
-        {
-            base.MouseWheel(args);
-
-            if (_data == null)
-                return;
-
-            var modifiers = CalcMouseModifiers();
-            var mouseEvent = new CefMouseEvent(
-                (int) args.RelativePosition.X, (int) args.RelativePosition.Y,
-                modifiers);
-
-            _data.Browser.GetHost().SendMouseWheelEvent(
-                mouseEvent,
-                (int) args.Delta.X * ScrollSpeed,
-                (int) args.Delta.Y * ScrollSpeed);
-        }
-
-        bool IRawInputControl.RawKeyEvent(in GuiRawKeyEvent guiRawEvent)
-        {
-            if (_data == null)
-                return false;
-
-            var host = _data.Browser.GetHost();
-
-            if (guiRawEvent.Key is Key.MouseLeft or Key.MouseMiddle or Key.MouseRight)
-            {
-                var key = guiRawEvent.Key switch
-                {
-                    Key.MouseLeft => CefMouseButtonType.Left,
-                    Key.MouseMiddle => CefMouseButtonType.Middle,
-                    Key.MouseRight => CefMouseButtonType.Right,
-                    _ => default // not possible
-                };
-
-                var mouseEvent = new CefMouseEvent(
-                    guiRawEvent.MouseRelative.X, guiRawEvent.MouseRelative.Y,
-                    CefEventFlags.None);
-
-                // Logger.Debug($"MOUSE: {guiRawEvent.Action} {guiRawEvent.Key} {guiRawEvent.ScanCode} {key}");
-
-                // TODO: double click support?
-                host.SendMouseClickEvent(mouseEvent, key, guiRawEvent.Action == RawKeyAction.Up, 1);
-            }
-            else
-            {
-                // TODO: Handle left/right modifier keys??
-                if (!_keyMap.TryGetValue(guiRawEvent.Key, out var vkKey))
-                    vkKey = default;
-
-                // Logger.Debug($"{guiRawEvent.Action} {guiRawEvent.Key} {guiRawEvent.ScanCode} {vkKey}");
-
-                var lParam = 0;
-                lParam |= (guiRawEvent.ScanCode & 0xFF) << 16;
-                if (guiRawEvent.Action != RawKeyAction.Down)
-                    lParam |= 1 << 30;
-
-                if (guiRawEvent.Action == RawKeyAction.Up)
-                    lParam |= 1 << 31;
-
-                var modifiers = CalcModifiers(guiRawEvent.Key);
-
-                host.SendKeyEvent(new CefKeyEvent
-                {
-                    // Repeats are sent as key downs, I guess?
-                    EventType = guiRawEvent.Action == RawKeyAction.Up
-                        ? CefKeyEventType.KeyUp
-                        : CefKeyEventType.RawKeyDown,
-                    NativeKeyCode = lParam,
-                    // NativeKeyCode = guiRawEvent.ScanCode,
-                    WindowsKeyCode = (int) vkKey,
-                    IsSystemKey = false, // TODO
-                    Modifiers = modifiers
-                });
-
-                if (guiRawEvent.Action != RawKeyAction.Up && guiRawEvent.Key == Key.Return)
-                {
-                    host.SendKeyEvent(new CefKeyEvent
-                    {
-                        EventType = CefKeyEventType.Char,
-                        WindowsKeyCode = '\r',
-                        NativeKeyCode = lParam,
-                        Modifiers = modifiers
-                    });
-                }
-            }
-
-            return true;
-        }
-
-        private CefEventFlags CalcModifiers(Key key)
-        {
-            CefEventFlags modifiers = default;
-
-            if (_inputMgr.IsKeyDown(Key.Control))
-                modifiers |= CefEventFlags.ControlDown;
-
-            if (_inputMgr.IsKeyDown(Key.Alt))
-                modifiers |= CefEventFlags.AltDown;
-
-            if (_inputMgr.IsKeyDown(Key.Shift))
-                modifiers |= CefEventFlags.ShiftDown;
-
-            if (_inputMgr.IsKeyDown(Key.Shift))
-                modifiers |= CefEventFlags.ShiftDown;
-
-            return modifiers;
-        }
-
-        private CefEventFlags CalcMouseModifiers()
-        {
-            CefEventFlags modifiers = default;
-
-            if (_inputMgr.IsKeyDown(Key.Control))
-                modifiers |= CefEventFlags.ControlDown;
-
-            if (_inputMgr.IsKeyDown(Key.Alt))
-                modifiers |= CefEventFlags.AltDown;
-
-            if (_inputMgr.IsKeyDown(Key.Shift))
-                modifiers |= CefEventFlags.ShiftDown;
-
-            if (_inputMgr.IsKeyDown(Key.Shift))
-                modifiers |= CefEventFlags.ShiftDown;
-
-            if (_inputMgr.IsKeyDown(Key.MouseLeft))
-                modifiers |= CefEventFlags.LeftMouseButton;
-
-            if (_inputMgr.IsKeyDown(Key.MouseMiddle))
-                modifiers |= CefEventFlags.MiddleMouseButton;
-
-            if (_inputMgr.IsKeyDown(Key.MouseRight))
-                modifiers |= CefEventFlags.RightMouseButton;
-
-            return modifiers;
-        }
-
-        protected internal override void TextEntered(GUITextEventArgs args)
-        {
-            base.TextEntered(args);
-
-            if (_data == null)
-                return;
-
-            var host = _data.Browser.GetHost();
-
-            Span<char> buf = stackalloc char[2];
-            var written = args.AsRune.EncodeToUtf16(buf);
-
-            for (var i = 0; i < written; i++)
-            {
-                host.SendKeyEvent(new CefKeyEvent
-                {
-                    EventType = CefKeyEventType.Char,
-                    WindowsKeyCode = buf[i],
-                    Character = buf[i],
-                    UnmodifiedCharacter = buf[i]
-                });
-            }
-        }
-
-        protected override void Resized()
-        {
-            base.Resized();
-
-            if (_data == null)
-                return;
-
-            _data.Browser.GetHost().NotifyMoveOrResizeStarted();
-            _data.Browser.GetHost().WasResized();
-            _data.Texture.Dispose();
-            _data.Texture = _clyde.CreateBlankTexture<Bgra32>((PixelWidth, PixelHeight));
-        }
-
-        protected internal override void Draw(DrawingHandleScreen handle)
-        {
-            base.Draw(handle);
-
-            if (_data == null)
-                return;
-
-            var bufImg = _data.Renderer.Buffer.Buffer;
-
-            _data.Texture.SetSubImage(
-                Vector2i.Zero,
-                bufImg,
-                new UIBox2i(
-                    0, 0,
-                    Math.Min(PixelWidth, bufImg.Width),
-                    Math.Min(PixelHeight, bufImg.Height)));
-
-            handle.DrawTexture(_data.Texture, Vector2.Zero);
-        }
-
-        public void StopLoad()
-        {
-            if (_data == null)
-                throw new InvalidOperationException();
-
-            _data.Browser.StopLoad();
-        }
-
-        public void Reload()
-        {
-            if (_data == null)
-                throw new InvalidOperationException();
-
-            _data.Browser.Reload();
-        }
-
-        public bool GoBack()
-        {
-            if (_data == null)
-                throw new InvalidOperationException();
-
-            if (!_data.Browser.CanGoBack)
-                return false;
-
-            _data.Browser.GoBack();
-            return true;
-        }
-
-        public bool GoForward()
-        {
-            if (_data == null)
-                throw new InvalidOperationException();
-
-            if (!_data.Browser.CanGoForward)
-                return false;
-
-            _data.Browser.GoForward();
-            return true;
-        }
-
-        public void ExecuteJavaScript(string code)
-        {
-            if (_data == null)
-                throw new InvalidOperationException();
-
-            // TODO: this should not run until the browser is done loading seriously does this even work?
-            _data.Browser.GetMainFrame().ExecuteJavaScript(code, string.Empty, 1);
-        }
-
-        public void AddResourceRequestHandler(Action<RequestHandlerContext> handler)
-        {
-            _requestHandler.AddResourceRequestHandler(handler);
-        }
-
-        public void RemoveResourceRequestHandler(Action<RequestHandlerContext> handler)
-        {
-            _requestHandler.RemoveResourceRequestHandler(handler);
-        }
-
-        public void AddBeforeBrowseHandler(Action<BeforeBrowseContext> handler)
-        {
-            _requestHandler.AddBeforeBrowseHandler(handler);
-        }
-
-        public void RemoveBeforeBrowseHandler(Action<BeforeBrowseContext> handler)
-        {
-            _requestHandler.RemoveBeforeBrowseHandler(handler);
-        }
-
-        private sealed class LiveData
-        {
-            public OwnedTexture Texture;
-            public readonly RobustCefClient Client;
-            public readonly CefBrowser Browser;
-            public readonly ControlRenderHandler Renderer;
-
-            public LiveData(
-                OwnedTexture texture,
-                RobustCefClient client,
-                CefBrowser browser,
-                ControlRenderHandler renderer)
-            {
-                Texture = texture;
-                Client = client;
-                Browser = browser;
-                Renderer = renderer;
-            }
-        }
-    }
-
-    internal class ControlRenderHandler : CefRenderHandler
-    {
-        public ImageBuffer Buffer { get; }
-        private Control _control;
-
-        internal ControlRenderHandler(Control control)
-        {
-            Buffer = new ImageBuffer(control);
-            _control = control;
-        }
-
-        protected override CefAccessibilityHandler? GetAccessibilityHandler() => null;
-
-        protected override void GetViewRect(CefBrowser browser, out CefRectangle rect)
-        {
-            if (_control.Disposed)
-            {
-                rect = new CefRectangle();
-                return;
-            }
-
-            // TODO CEF: Do we need to pass real screen coords? Cause what we do already works...
-            //var screenCoords = _control.ScreenCoordinates;
-            //rect = new CefRectangle((int) screenCoords.X, (int) screenCoords.Y, (int)Math.Max(_control.Size.X, 1), (int)Math.Max(_control.Size.Y, 1));
-
-            // We do the max between size and 1 because it will LITERALLY CRASH WITHOUT AN ERROR otherwise.
-            rect = new CefRectangle(0, 0, (int) Math.Max(_control.Size.X, 1), (int) Math.Max(_control.Size.Y, 1));
-        }
-
-        protected override bool GetScreenInfo(CefBrowser browser, CefScreenInfo screenInfo)
-        {
-            if (_control.Disposed)
-                return false;
-
-            // TODO CEF: Get actual scale factor?
-            screenInfo.DeviceScaleFactor = 1.0f;
-
-            return true;
-        }
-
-        protected override void OnPopupSize(CefBrowser browser, CefRectangle rect)
-        {
-            if (_control.Disposed)
-                return;
-        }
-
-        protected override void OnPaint(CefBrowser browser, CefPaintElementType type, CefRectangle[] dirtyRects,
-            IntPtr buffer, int width, int height)
-        {
-            if (_control.Disposed)
-                return;
-
-            foreach (var dirtyRect in dirtyRects)
-            {
-                Buffer.UpdateBuffer(width, height, buffer, dirtyRect);
-            }
-        }
-
-        protected override void OnAcceleratedPaint(CefBrowser browser, CefPaintElementType type,
-            CefRectangle[] dirtyRects, IntPtr sharedHandle)
-        {
-            // Unused, but we're forced to implement it so.. NOOP.
-        }
-
-        protected override void OnScrollOffsetChanged(CefBrowser browser, double x, double y)
-        {
-            if (_control.Disposed)
-                return;
-        }
-
-        protected override void OnImeCompositionRangeChanged(CefBrowser browser, CefRange selectedRange,
-            CefRectangle[] characterBounds)
-        {
-            if (_control.Disposed)
-                return;
-        }
-    }
-}

Robust.Client.CEF/CefManager.cs

@@ -1,104 +0,0 @@
-using System;
-using System.IO;
-using JetBrains.Annotations;
-using Robust.Shared.ContentPack;
-using Robust.Shared.Log;
-using Robust.Shared.Utility;
-
-// The library we're using right now. TODO CEF: Do we want to use something else? We will need to ship it ourselves if so.
-using Xilium.CefGlue;
-
-namespace Robust.Client.CEF
-{
-    // Register this with IoC.
-    // TODO CEF: think if making this inherit CefApp is a good idea...
-    // TODO CEF: A way to handle external window browsers...
-    [UsedImplicitly]
-    public partial class CefManager
-    {
-        private CefApp _app = default!;
-        private bool _initialized = false;
-
-        /// <summary>
-        ///     Call this to initialize CEF.
-        /// </summary>
-        public void Initialize()
-        {
-            DebugTools.Assert(!_initialized);
-
-            string subProcessName;
-            if (OperatingSystem.IsWindows())
-                subProcessName = "Robust.Client.CEF.exe";
-            else if (OperatingSystem.IsLinux())
-                subProcessName = "Robust.Client.CEF";
-            else
-                throw new NotSupportedException("Unsupported platform for CEF!");
-
-            var subProcessPath = PathHelpers.ExecutableRelativeFile(subProcessName);
-
-            var settings = new CefSettings()
-            {
-                WindowlessRenderingEnabled = true, // So we can render to our UI controls.
-                ExternalMessagePump = false, // Unsure, honestly. TODO CEF: Research this?
-                NoSandbox = true, // Not disabling the sandbox crashes CEF.
-                BrowserSubprocessPath = subProcessPath,
-                LocalesDirPath = Path.Combine(PathHelpers.GetExecutableDirectory(), "locales"),
-                ResourcesDirPath = PathHelpers.GetExecutableDirectory(),
-                RemoteDebuggingPort = 9222
-            };
-
-            Logger.Info($"CEF Version: {CefRuntime.ChromeVersion}");
-
-            // --------------------------- README --------------------------------------------------
-            // By the way! You're gonna need the CEF binaries in your client's bin folder.
-            // More specifically, version cef_binary_91.1.21+g9dd45fe+chromium-91.0.4472.114
-            // https://cef-builds.spotifycdn.com/cef_binary_91.1.21%2Bg9dd45fe%2Bchromium-91.0.4472.114_windows64_minimal.tar.bz2
-            // https://cef-builds.spotifycdn.com/cef_binary_91.1.21%2Bg9dd45fe%2Bchromium-91.0.4472.114_linux64_minimal.tar.bz2
-            // Here's how to get it to work:
-            // 1. Copy all the contents of "Release" to the bin folder.
-            // 2. Copy all the contents of "Resources" to the bin folder.
-            // Supposedly, you should just need libcef.so in Release and icudtl.dat in Resources...
-            // The rest might be optional.
-            // Maybe. Good luck! If you get odd crashes with no info and a weird exit code, use GDB!
-            // -------------------------------------------------------------------------------------
-
-            _app = new RobustCefApp();
-
-            // We pass no main arguments...
-            CefRuntime.Initialize(new CefMainArgs(null), settings, _app, IntPtr.Zero);
-
-            // TODO CEF: After this point, debugging breaks. No, literally. My client crashes but ONLY with the debugger.
-            // I have tried using the DEBUG and RELEASE versions of libcef.so, stripped or non-stripped...
-            // And nothing seemed to work. Odd.
-
-            _initialized = true;
-        }
-
-        public void CheckInitialized()
-        {
-            if (!_initialized)
-                throw new InvalidOperationException("CefManager has not been initialized!");
-        }
-
-        /// <summary>
-        ///     Needs to be called regularly for CEF to keep working.
-        /// </summary>
-        public void Update()
-        {
-            DebugTools.Assert(_initialized);
-
-            // Calling this makes CEF do its work, without using its own update loop.
-            CefRuntime.DoMessageLoopWork();
-        }
-
-        /// <summary>
-        ///     Call before program shutdown.
-        /// </summary>
-        public void Shutdown()
-        {
-            DebugTools.Assert(_initialized);
-
-            CefRuntime.Shutdown();
-        }
-    }
-}

Robust.Client.CEF/IBrowserWindow.cs

@@ -1,9 +0,0 @@
-using System;
-
-namespace Robust.Client.CEF
-{
-    public interface IBrowserWindow : IBrowserControl, IDisposable
-    {
-        bool Closed { get; }
-    }
-}

Robust.Client.CEF/Program.cs

@@ -1,33 +0,0 @@
-using System;
-using Xilium.CefGlue;
-
-namespace Robust.Client.CEF
-{
-    public static class Program
-    {
-        // This was supposed to be the main entry for the subprocess program... It doesn't work.
-        public static int Main(string[] args)
-        {
-            // This is a workaround for this to work on UNIX.
-            var argv = args;
-            if (CefRuntime.Platform != CefRuntimePlatform.Windows)
-            {
-                argv = new string[args.Length + 1];
-                Array.Copy(args, 0, argv, 1, args.Length);
-                argv[0] = "-";
-            }
-
-            var mainArgs = new CefMainArgs(argv);
-
-            // This will block executing until the subprocess is shut down.
-            var code = CefRuntime.ExecuteProcess(mainArgs, null, IntPtr.Zero);
-
-            if (code != 0)
-            {
-                System.Console.WriteLine($"CEF Subprocess exited unsuccessfully with exit code {code}! Arguments: {string.Join(' ', argv)}");
-            }
-
-            return code;
-        }
-    }
-}

Robust.Client.CEF/Robust.Client.CEF.csproj

@@ -1,25 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-    <Import Project="..\MSBuild\Robust.Properties.targets" />
-    <Import Project="..\MSBuild\Robust.Engine.props" />
-    <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
-        <PlatformTarget>x64</PlatformTarget>
-        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-        <OutputType>WinExe</OutputType>
-    </PropertyGroup>
-
-    <Import Project="..\MSBuild\Robust.DefineConstants.targets" />
-    <Target Name="RobustAfterBuild" AfterTargets="Build" />
-    <Import Project="..\MSBuild\Robust.Engine.targets" />
-
-    <ItemGroup>
-      <PackageReference Include="JetBrains.Annotations" Version="2020.3.0" />
-      <PackageReference Include="System.Drawing.Common" Version="5.0.2" />
-    </ItemGroup>
-
-    <ItemGroup>
-      <ProjectReference Include="..\cefglue\CefGlue\CefGlue.csproj" />
-      <ProjectReference Include="..\Robust.Client\Robust.Client.csproj" />
-    </ItemGroup>
-
-</Project>

Robust.Client.NameGenerator/Robust.Client.NameGenerator.csproj

@@ -13,5 +13,6 @@
     <Compile Link="XamlX\filename" Include="../XamlX/src/XamlX/**/*.cs" />
     <Compile Remove="../XamlX/src/XamlX/**/SreTypeSystem.cs" />
     <Compile Remove="../XamlX/src/XamlX/obj/**" />
+    <Compile Include="..\Robust.Client\UserInterface\ControlPropertyAccess.cs" />
   </ItemGroup>
 </Project>

Robust.Client.NameGenerator/XamlUiPartialClassGenerator.cs

@@ -6,6 +6,7 @@ using System.Text;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.Text;
+using Robust.Client.UserInterface;
 using XamlX.Ast;
 using XamlX.Emit;
 using XamlX.IL;
@@ -37,9 +38,10 @@ namespace Robust.Client.AutoGenerated
 
         class NameVisitor : IXamlAstVisitor
         {
-            private List<(string name, string type)> _names = new List<(string name, string type)>();
+            private readonly List<(string name, string type, AccessLevel access)> _names =
+                new List<(string name, string type, AccessLevel access)>();
 
-            public static List<(string name, string type)> GetNames(IXamlAstNode node)
+            public static List<(string name, string type, AccessLevel access)> GetNames(IXamlAstNode node)
             {
                 var visitor = new NameVisitor();
                 node.Visit(visitor);
@@ -56,27 +58,42 @@ namespace Robust.Client.AutoGenerated
                 {
                     var clrtype = objectNode.Type.GetClrType();
                     var isControl = IsControl(clrtype);
-                    //clrtype.Interfaces.Any(i =>
-                    //i.IsInterface && i.FullName == "Robust.Client.UserInterface.IControl");
 
                     if (!isControl)
                         return node;
 
+                    // Find Name and Access properties
+                    XamlAstTextNode nameText = null;
+                    XamlAstTextNode accessText = null;
                     foreach (var child in objectNode.Children)
                     {
                         if (child is XamlAstXamlPropertyValueNode propertyValueNode &&
                             propertyValueNode.Property is XamlAstNamePropertyReference namedProperty &&
-                            namedProperty.Name == "Name" &&
                             propertyValueNode.Values.Count > 0 &&
                             propertyValueNode.Values[0] is XamlAstTextNode text)
                         {
-                            var reg = (text.Text, $@"{clrtype.Namespace}.{clrtype.Name}");
-                            if (!_names.Contains(reg))
+                            switch (namedProperty.Name)
                             {
-                                _names.Add(reg);
+                                case "Name":
+                                    nameText = text;
+                                    break;
+                                case "Access":
+                                    accessText = text;
+                                    break;
                             }
                         }
                     }
+
+                    if (nameText == null)
+                        return node;
+
+                    var reg = (nameText.Text,
+                        $@"{clrtype.Namespace}.{clrtype.Name}",
+                        accessText != null ? (AccessLevel) Enum.Parse(typeof(AccessLevel), accessText.Text) : AccessLevel.Protected);
+                    if (!_names.Contains(reg))
+                    {
+                        _names.Add(reg);
+                    }
                 }
 
                 return node;
@@ -94,7 +111,8 @@ namespace Robust.Client.AutoGenerated
         private static string GenerateSourceCode(
             INamedTypeSymbol classSymbol,
             string xamlFile,
-            CSharpCompilation comp)
+            CSharpCompilation comp,
+            string fileName)
         {
             var className = classSymbol.Name;
             var nameSpace = classSymbol.ContainingNamespace.ToDisplayString();
@@ -118,11 +136,42 @@ namespace Robust.Client.AutoGenerated
             if (classSymbol.ToString() != rootTypeString && classSymbol.BaseType?.ToString() != rootTypeString)
                 throw new InvalidXamlRootTypeException(rootType, classSymbol, classSymbol.BaseType);
 
-            var fieldAccess = classSymbol.IsSealed ? "private" : "protected";
-            //var names = NameVisitor.GetNames((XamlAstObjectNode)XDocumentXamlParser.Parse(xamlFile).Root);
-            var namedControls = names.Select(info => "        " +
-                                                     $"{fieldAccess} global::{info.type} {info.name} => " +
-                                                     $"this.FindControl<global::{info.type}>(\"{info.name}\");");
+            var namedControls = names.Select(info =>
+            {
+                (string name, string type, AccessLevel access) = info;
+
+                string accessStr;
+                switch (access)
+                {
+                    case AccessLevel.Public:
+                        accessStr = "public";
+                        break;
+                    case AccessLevel.Protected when classSymbol.IsSealed:
+                    case AccessLevel.PrivateProtected when classSymbol.IsSealed:
+                    case AccessLevel.Private:
+                        accessStr = "private";
+                        break;
+                    case AccessLevel.Protected:
+                        accessStr = "protected";
+                        break;
+                    case AccessLevel.PrivateProtected:
+                        accessStr = "private protected";
+                        break;
+                    case AccessLevel.Internal:
+                    case AccessLevel.ProtectedInternal when classSymbol.IsSealed:
+                        accessStr = "internal";
+                        break;
+                    case AccessLevel.ProtectedInternal:
+                        accessStr = "protected internal";
+                        break;
+                    default:
+                        throw new ArgumentException($"Invalid access level \"{Enum.GetName(typeof(AccessLevel), access)}\" " +
+                                                    $"for control {name} in file {fileName}.");
+                }
+
+                return $"        {accessStr} global::{type} {name} => this.FindControl<global::{type}>(\"{name}\");";
+            });
+
             return $@"// <auto-generated />
 using Robust.Client.UserInterface;
 using Robust.Client.UserInterface.Controls;
@@ -136,7 +185,6 @@ namespace {nameSpace}
 ";
         }
 
-
         public void Execute(GeneratorExecutionContext context)
         {
             var comp = (CSharpCompilation) context.Compilation;
@@ -207,7 +255,7 @@ namespace {nameSpace}
 
                 try
                 {
-                    var sourceCode = GenerateSourceCode(typeSymbol, txt, comp);
+                    var sourceCode = GenerateSourceCode(typeSymbol, txt, comp, xamlFileName);
                     context.AddSource($"{typeSymbol.Name}.g.cs", SourceText.From(sourceCode, Encoding.UTF8));
                 }
                 catch (InvalidXamlRootTypeException invRootType)

Robust.Client.WebView/BrowserWindowCreateParameters.cs

@@ -1,4 +1,4 @@
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView
 {
     public sealed class BrowserWindowCreateParameters
     {

Robust.Client.WebView/Cef/CefBeforeBrowseContext.cs

@@ -1,8 +1,8 @@
 using Xilium.CefGlue;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView.Cef
 {
-    public sealed class BeforeBrowseContext
+    internal sealed class CefBeforeBrowseContext : IBeforeBrowseContext
     {
         internal readonly CefRequest CefRequest;
 
@@ -14,7 +14,7 @@ namespace Robust.Client.CEF
 
         public bool IsCancelled { get; private set; }
 
-        internal BeforeBrowseContext(
+        internal CefBeforeBrowseContext(
             bool isRedirect,
             bool userGesture,
             CefRequest cefRequest)

Robust.Client.WebView/Cef/CefKeyCodes.cs

@@ -1,7 +1,7 @@
 
 using System.Diagnostics.CodeAnalysis;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView.Cef
 {
     [SuppressMessage("ReSharper", "InconsistentNaming")]
     [SuppressMessage("ReSharper", "UnusedMember.Global")]

Robust.Client.WebView/Cef/CefRequestHandlerContext.cs

@@ -3,9 +3,9 @@ using System.IO;
 using System.Net;
 using Xilium.CefGlue;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView.Cef
 {
-    public sealed class RequestHandlerContext
+    internal sealed class CefRequestHandlerContext : IRequestHandlerContext
     {
         internal readonly CefRequest CefRequest;
 
@@ -22,7 +22,7 @@ namespace Robust.Client.CEF
 
         internal IRequestResult? Result { get; private set; }
 
-        internal RequestHandlerContext(
+        internal CefRequestHandlerContext(
             bool isNavigation,
             bool isDownload,
             string requestInitiator,

Robust.Client.WebView/Cef/ImageBuffer.cs

@@ -1,22 +1,14 @@
 using System;
-using Robust.Client.UserInterface;
 using Robust.Client.Utility;
 using Robust.Shared.Maths;
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.PixelFormats;
 using Xilium.CefGlue;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView.Cef
 {
     internal sealed class ImageBuffer
     {
-        private readonly Control _control;
-
-        public ImageBuffer(Control control)
-        {
-            _control = control;
-        }
-
         public Image<Bgra32> Buffer { get; private set; } = new(1, 1);
 
         public unsafe void UpdateBuffer(int width, int height, IntPtr buffer, CefRectangle dirtyRect)

Robust.Client.WebView/Cef/Program.cs

@@ -0,0 +1,88 @@
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using Robust.Shared.ContentPack;
+using Xilium.CefGlue;
+
+namespace Robust.Client.WebView.Cef
+{
+    public static class Program
+    {
+        // This was supposed to be the main entry for the subprocess program... It doesn't work.
+        public static int Main(string[] args)
+        {
+            // This is a workaround for this to work on UNIX.
+            var argv = args;
+            if (CefRuntime.Platform != CefRuntimePlatform.Windows)
+            {
+                argv = new string[args.Length + 1];
+                Array.Copy(args, 0, argv, 1, args.Length);
+                argv[0] = "-";
+            }
+/* 
+            if (OperatingSystem.IsLinux())
+            {
+                // Chromium tries to load libEGL.so and libGLESv2.so relative to the process executable on Linux.
+                // (Compared to Windows where it is relative to Chromium's *module*)
+                // There is a TODO "is this correct?" in the Chromium code for this.
+                // Great.
+                
+                //CopyDllToExecutableDir("libEGL.so");
+                //CopyDllToExecutableDir("libGLESv2.so");
+
+                // System.Threading.Thread.Sleep(200000);
+            }
+ */
+            var mainArgs = new CefMainArgs(argv);
+
+            // This will block executing until the subprocess is shut down.
+            var code = CefRuntime.ExecuteProcess(mainArgs, null, IntPtr.Zero);
+
+            if (code != 0)
+            {
+                System.Console.WriteLine($"CEF Subprocess exited unsuccessfully with exit code {code}! Arguments: {string.Join(' ', argv)}");
+            }
+
+            return code;
+        }
+
+/*         private static void CopyDllToExecutableDir(string dllName)
+        {
+            var executableDir = PathHelpers.GetExecutableDirectory();
+            var targetPath = Path.Combine(executableDir, dllName);
+            if (File.Exists(targetPath))
+                return;
+
+            // Find source file.
+            string? srcFile = null;
+            foreach (var searchDir in WebViewManagerCef.NativeDllSearchDirectories())
+            {
+                var searchPath = Path.Combine(searchDir, dllName);
+                if (File.Exists(searchPath))
+                {
+                    srcFile = searchPath;
+                    break;
+                }
+            }
+
+            if (srcFile == null)
+                return;
+
+            for (var i = 0; i < 5; i++)
+            {
+                try
+                {
+                    if (File.Exists(targetPath))
+                        return;
+
+                    File.Copy(srcFile, targetPath);
+                    return;
+                }
+                catch 
+                {
+                    // Catching race condition lock errors and stuff I guess.
+                }
+            }
+        } */
+    }
+}

Robust.Client.WebView/Cef/RequestResults.cs

@@ -3,7 +3,7 @@ using System.IO;
 using System.Net;
 using Xilium.CefGlue;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView.Cef
 {
     internal interface IRequestResult
     {
@@ -88,6 +88,13 @@ namespace Robust.Client.CEF
             protected override void Cancel()
             {
             }
+
+            protected override void Dispose(bool disposing)
+            {
+                base.Dispose(disposing);
+
+                _stream.Dispose();
+            }
         }
     }
 }

Robust.Client.WebView/Cef/RobustCefApp.cs

@@ -3,7 +3,7 @@ using Robust.Shared.IoC;
 using Robust.Shared.Log;
 using Xilium.CefGlue;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView.Cef
 {
     internal class RobustCefApp : CefApp
     {
@@ -24,6 +24,13 @@ namespace Robust.Client.CEF
         {
             // Disable zygote on Linux.
             commandLine.AppendSwitch("--no-zygote");
+            
+            // Work around https://bitbucket.org/chromiumembedded/cef/issues/3213/ozone-egl-initialization-does-not-have
+            // Desktop GL force makes Chromium not try to load its own ANGLE/Swiftshader so load paths aren't problematic.
+            if (OperatingSystem.IsLinux())
+                commandLine.AppendSwitch("--use-gl", "desktop");
+            
+            // commandLine.AppendSwitch("--single-process");
 
             //commandLine.AppendSwitch("--disable-gpu");
             //commandLine.AppendSwitch("--disable-gpu-compositing");

Robust.Client.WebView/Cef/RobustCefClient.cs

@@ -1,6 +1,6 @@
 using Xilium.CefGlue;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView.Cef
 {
     // Simple CEF client.
     internal class RobustCefClient : CefClient

Robust.Client.WebView/Cef/RobustLoadHandler.cs

@@ -1,6 +1,6 @@
 using Xilium.CefGlue;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView.Cef
 {
     public sealed class RobustLoadHandler : CefLoadHandler
     {

Robust.Client.WebView/Cef/RobustRequestHandler.cs

@@ -3,20 +3,20 @@ using System.Collections.Generic;
 using Robust.Shared.Log;
 using Xilium.CefGlue;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView.Cef
 {
     internal sealed class RobustRequestHandler : CefRequestHandler
     {
         private readonly ISawmill _sawmill;
-        private readonly List<Action<RequestHandlerContext>> _resourceRequestHandlers = new();
-        private readonly List<Action<BeforeBrowseContext>> _beforeBrowseHandlers = new();
+        private readonly List<Action<IRequestHandlerContext>> _resourceRequestHandlers = new();
+        private readonly List<Action<IBeforeBrowseContext>> _beforeBrowseHandlers = new();
 
         public RobustRequestHandler(ISawmill sawmill)
         {
             _sawmill = sawmill;
         }
 
-        public void AddResourceRequestHandler(Action<RequestHandlerContext> handler)
+        public void AddResourceRequestHandler(Action<IRequestHandlerContext> handler)
         {
             lock (_resourceRequestHandlers)
             {
@@ -24,7 +24,7 @@ namespace Robust.Client.CEF
             }
         }
 
-        public void RemoveResourceRequestHandler(Action<RequestHandlerContext> handler)
+        public void RemoveResourceRequestHandler(Action<IRequestHandlerContext> handler)
         {
             lock (_resourceRequestHandlers)
             {
@@ -32,7 +32,7 @@ namespace Robust.Client.CEF
             }
         }
 
-        public void AddBeforeBrowseHandler(Action<BeforeBrowseContext> handler)
+        public void AddBeforeBrowseHandler(Action<IBeforeBrowseContext> handler)
         {
             lock (_beforeBrowseHandlers)
             {
@@ -40,7 +40,7 @@ namespace Robust.Client.CEF
             }
         }
 
-        public void RemoveBeforeBrowseHandler(Action<BeforeBrowseContext> handler)
+        public void RemoveBeforeBrowseHandler(Action<IBeforeBrowseContext> handler)
         {
             lock (_beforeBrowseHandlers)
             {
@@ -61,7 +61,7 @@ namespace Robust.Client.CEF
             {
                 _sawmill.Debug($"HANDLING REQUEST: {request.Url}");
 
-                var context = new RequestHandlerContext(isNavigation, isDownload, requestInitiator, request);
+                var context = new CefRequestHandlerContext(isNavigation, isDownload, requestInitiator, request);
 
                 foreach (var handler in _resourceRequestHandlers)
                 {
@@ -85,7 +85,7 @@ namespace Robust.Client.CEF
         {
             lock (_beforeBrowseHandlers)
             {
-                var context = new BeforeBrowseContext(isRedirect, userGesture, request);
+                var context = new CefBeforeBrowseContext(isRedirect, userGesture, request);
 
                 foreach (var handler in _beforeBrowseHandlers)
                 {

Robust.Client.WebView/Cef/WebViewManagerCef.BrowserWindow.cs

@@ -6,26 +6,25 @@ using Robust.Shared.Log;
 using Robust.Shared.ViewVariables;
 using Xilium.CefGlue;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView.Cef
 {
-    public partial class CefManager
+    internal partial class WebViewManagerCef
     {
         [Dependency] private readonly IClydeInternal _clyde = default!;
 
-        private readonly List<BrowserWindowImpl> _browserWindows = new();
+        private readonly List<WebViewWindowImpl> _browserWindows = new();
 
-        public IEnumerable<IBrowserWindow> AllBrowserWindows => _browserWindows;
+        public IEnumerable<IWebViewWindow> AllBrowserWindows => _browserWindows;
 
-        public IBrowserWindow CreateBrowserWindow(BrowserWindowCreateParameters createParams)
+        public IWebViewWindow CreateBrowserWindow(BrowserWindowCreateParameters createParams)
         {
             var mainHWnd = (_clyde.MainWindow as IClydeWindowInternal)?.WindowsHWnd ?? 0;
 
             var info = CefWindowInfo.Create();
-            info.Width = createParams.Width;
-            info.Height = createParams.Height;
+            info.Bounds = new CefRectangle(0, 0, createParams.Width, createParams.Height);
             info.SetAsPopup(mainHWnd, "ss14cef");
 
-            var impl = new BrowserWindowImpl(this);
+            var impl = new WebViewWindowImpl(this);
 
             var lifeSpanHandler = new WindowLifeSpanHandler(impl);
             var reqHandler = new RobustRequestHandler(Logger.GetSawmill("root"));
@@ -40,13 +39,13 @@ namespace Robust.Client.CEF
             return impl;
         }
 
-        private sealed class BrowserWindowImpl : IBrowserWindow
+        private sealed class WebViewWindowImpl : IWebViewWindow
         {
-            private readonly CefManager _manager;
+            private readonly WebViewManagerCef _manager;
             internal CefBrowser Browser = default!;
             internal RobustRequestHandler RequestHandler = default!;
 
-            public Action<RequestHandlerContext>? OnResourceRequest { get; set; }
+            public Action<CefRequestHandlerContext>? OnResourceRequest { get; set; }
 
             [ViewVariables(VVAccess.ReadWrite)]
             public string Url
@@ -73,7 +72,7 @@ namespace Robust.Client.CEF
                 }
             }
 
-            public BrowserWindowImpl(CefManager manager)
+            public WebViewWindowImpl(WebViewManagerCef manager)
             {
                 _manager = manager;
             }
@@ -116,12 +115,12 @@ namespace Robust.Client.CEF
                 Browser.GetMainFrame().ExecuteJavaScript(code, string.Empty, 1);
             }
 
-            public void AddResourceRequestHandler(Action<RequestHandlerContext> handler)
+            public void AddResourceRequestHandler(Action<IRequestHandlerContext> handler)
             {
                 RequestHandler.AddResourceRequestHandler(handler);
             }
 
-            public void RemoveResourceRequestHandler(Action<RequestHandlerContext> handler)
+            public void RemoveResourceRequestHandler(Action<IRequestHandlerContext> handler)
             {
                 RequestHandler.RemoveResourceRequestHandler(handler);
             }
@@ -168,9 +167,9 @@ namespace Robust.Client.CEF
 
         private sealed class WindowLifeSpanHandler : CefLifeSpanHandler
         {
-            private readonly BrowserWindowImpl _windowImpl;
+            private readonly WebViewWindowImpl _windowImpl;
 
-            public WindowLifeSpanHandler(BrowserWindowImpl windowImpl)
+            public WindowLifeSpanHandler(WebViewWindowImpl windowImpl)
             {
                 _windowImpl = windowImpl;
             }

Robust.Client.WebView/Cef/WebViewManagerCef.Control.cs

@@ -0,0 +1,580 @@
+using System;
+using System.Collections.Generic;
+using Robust.Client.Graphics;
+using Robust.Client.Input;
+using Robust.Client.UserInterface;
+using Robust.Shared.IoC;
+using Robust.Shared.Log;
+using Robust.Shared.Maths;
+using Robust.Shared.Utility;
+using SixLabors.ImageSharp.PixelFormats;
+using Xilium.CefGlue;
+using static Robust.Client.WebView.Cef.CefKeyCodes.ChromiumKeyboardCode;
+using static Robust.Client.Input.Keyboard;
+
+namespace Robust.Client.WebView.Cef
+{
+    internal partial class WebViewManagerCef
+    {
+        public IWebViewControlImpl MakeControlImpl(WebViewControl owner)
+        {
+            var impl =  new ControlImpl(owner);
+            _dependencyCollection.InjectDependencies(impl);
+            return impl;
+        }
+
+        private sealed class ControlImpl : IWebViewControlImpl
+        {
+            private static readonly Dictionary<Key, CefKeyCodes.ChromiumKeyboardCode> KeyMap = new()
+            {
+                [Key.A] = VKEY_A,
+                [Key.B] = VKEY_B,
+                [Key.C] = VKEY_C,
+                [Key.D] = VKEY_D,
+                [Key.E] = VKEY_E,
+                [Key.F] = VKEY_F,
+                [Key.G] = VKEY_G,
+                [Key.H] = VKEY_H,
+                [Key.I] = VKEY_I,
+                [Key.J] = VKEY_J,
+                [Key.K] = VKEY_K,
+                [Key.L] = VKEY_L,
+                [Key.M] = VKEY_M,
+                [Key.N] = VKEY_N,
+                [Key.O] = VKEY_O,
+                [Key.P] = VKEY_P,
+                [Key.Q] = VKEY_Q,
+                [Key.R] = VKEY_R,
+                [Key.S] = VKEY_S,
+                [Key.T] = VKEY_T,
+                [Key.U] = VKEY_U,
+                [Key.V] = VKEY_V,
+                [Key.W] = VKEY_W,
+                [Key.X] = VKEY_X,
+                [Key.Y] = VKEY_Y,
+                [Key.Z] = VKEY_Z,
+                [Key.Num0] = VKEY_0,
+                [Key.Num1] = VKEY_1,
+                [Key.Num2] = VKEY_2,
+                [Key.Num3] = VKEY_3,
+                [Key.Num4] = VKEY_4,
+                [Key.Num5] = VKEY_5,
+                [Key.Num6] = VKEY_6,
+                [Key.Num7] = VKEY_7,
+                [Key.Num8] = VKEY_8,
+                [Key.Num9] = VKEY_9,
+                [Key.NumpadNum0] = VKEY_NUMPAD0,
+                [Key.NumpadNum1] = VKEY_NUMPAD1,
+                [Key.NumpadNum2] = VKEY_NUMPAD2,
+                [Key.NumpadNum3] = VKEY_NUMPAD3,
+                [Key.NumpadNum4] = VKEY_NUMPAD4,
+                [Key.NumpadNum5] = VKEY_NUMPAD5,
+                [Key.NumpadNum6] = VKEY_NUMPAD6,
+                [Key.NumpadNum7] = VKEY_NUMPAD7,
+                [Key.NumpadNum8] = VKEY_NUMPAD8,
+                [Key.NumpadNum9] = VKEY_NUMPAD9,
+                [Key.Escape] = VKEY_ESCAPE,
+                [Key.Control] = VKEY_CONTROL,
+                [Key.Shift] = VKEY_SHIFT,
+                [Key.Alt] = VKEY_MENU,
+                [Key.LSystem] = VKEY_LWIN,
+                [Key.RSystem] = VKEY_RWIN,
+                [Key.LBracket] = VKEY_OEM_4,
+                [Key.RBracket] = VKEY_OEM_6,
+                [Key.SemiColon] = VKEY_OEM_1,
+                [Key.Comma] = VKEY_OEM_COMMA,
+                [Key.Period] = VKEY_OEM_PERIOD,
+                [Key.Apostrophe] = VKEY_OEM_7,
+                [Key.Slash] = VKEY_OEM_2,
+                [Key.BackSlash] = VKEY_OEM_5,
+                [Key.Tilde] = VKEY_OEM_3,
+                [Key.Equal] = VKEY_OEM_PLUS,
+                [Key.Space] = VKEY_SPACE,
+                [Key.Return] = VKEY_RETURN,
+                [Key.BackSpace] = VKEY_BACK,
+                [Key.Tab] = VKEY_TAB,
+                [Key.PageUp] = VKEY_PRIOR,
+                [Key.PageDown] = VKEY_NEXT,
+                [Key.End] = VKEY_END,
+                [Key.Home] = VKEY_HOME,
+                [Key.Insert] = VKEY_INSERT,
+                [Key.Delete] = VKEY_DELETE,
+                [Key.Minus] = VKEY_OEM_MINUS,
+                [Key.NumpadAdd] = VKEY_ADD,
+                [Key.NumpadSubtract] = VKEY_SUBTRACT,
+                [Key.NumpadDivide] = VKEY_DIVIDE,
+                [Key.NumpadMultiply] = VKEY_MULTIPLY,
+                [Key.NumpadDecimal] = VKEY_DECIMAL,
+                [Key.Left] = VKEY_LEFT,
+                [Key.Right] = VKEY_RIGHT,
+                [Key.Up] = VKEY_UP,
+                [Key.Down] = VKEY_DOWN,
+                [Key.F1] = VKEY_F1,
+                [Key.F2] = VKEY_F2,
+                [Key.F3] = VKEY_F3,
+                [Key.F4] = VKEY_F4,
+                [Key.F5] = VKEY_F5,
+                [Key.F6] = VKEY_F6,
+                [Key.F7] = VKEY_F7,
+                [Key.F8] = VKEY_F8,
+                [Key.F9] = VKEY_F9,
+                [Key.F10] = VKEY_F10,
+                [Key.F11] = VKEY_F11,
+                [Key.F12] = VKEY_F12,
+                [Key.F13] = VKEY_F13,
+                [Key.F14] = VKEY_F14,
+                [Key.F15] = VKEY_F15,
+                [Key.Pause] = VKEY_PAUSE,
+            };
+
+            [Dependency] private readonly IClyde _clyde = default!;
+            [Dependency] private readonly IInputManager _inputMgr = default!;
+
+            public readonly WebViewControl Owner;
+
+            public ControlImpl(WebViewControl owner)
+            {
+                Owner = owner;
+            }
+
+            private const int ScrollSpeed = 50;
+
+            private readonly RobustRequestHandler _requestHandler = new(Logger.GetSawmill("root"));
+            private LiveData? _data;
+            private string _startUrl = "about:blank";
+
+            public string Url
+            {
+                get => _data == null ? _startUrl : _data.Browser.GetMainFrame().Url;
+                set
+                {
+                    if (_data == null)
+                        _startUrl = value;
+                    else
+                        _data.Browser.GetMainFrame().LoadUrl(value);
+                }
+            }
+
+            public bool IsLoading => _data?.Browser.IsLoading ?? false;
+
+            public void EnteredTree()
+            {
+                DebugTools.AssertNull(_data);
+
+                // A funny render handler that will allow us to render to the control.
+                var renderer = new ControlRenderHandler(this);
+
+                // A funny web cef client. This can actually be shared by multiple browsers, but I'm not sure how the
+                // rendering would work in that case? TODO CEF: Investigate a way to share the web client?
+                var client = new RobustCefClient(renderer, _requestHandler, new RobustLoadHandler());
+
+                var info = CefWindowInfo.Create();
+
+                // FUNFACT: If you DO NOT set these below and set info.Width/info.Height instead, you get an external window
+                // Good to know, huh? Setup is the same, except you can pass a dummy render handler to the CEF client.
+                info.SetAsWindowless(IntPtr.Zero, false); // TODO CEF: Pass parent handle?
+                info.WindowlessRenderingEnabled = true;
+
+                var settings = new CefBrowserSettings()
+                {
+                    WindowlessFrameRate = 60
+                };
+
+                // Create the web browser! And by default, we go to about:blank.
+                var browser = CefBrowserHost.CreateBrowserSync(info, client, settings, _startUrl);
+
+                var texture = _clyde.CreateBlankTexture<Bgra32>(Vector2i.One);
+
+                _data = new LiveData(texture, client, browser, renderer);
+            }
+
+            public void ExitedTree()
+            {
+                DebugTools.AssertNotNull(_data);
+
+                _data!.Texture.Dispose();
+                _data.Browser.GetHost().CloseBrowser(true);
+                _data = null;
+            }
+
+            public void MouseMove(GUIMouseMoveEventArgs args)
+            {
+                if (_data == null)
+                    return;
+
+                // Logger.Debug();
+                var modifiers = CalcMouseModifiers();
+                var mouseEvent = new CefMouseEvent(
+                    (int)args.RelativePosition.X, (int)args.RelativePosition.Y,
+                    modifiers);
+
+                _data.Browser.GetHost().SendMouseMoveEvent(mouseEvent, false);
+            }
+
+            public void MouseExited()
+            {
+                if (_data == null)
+                    return;
+
+                var modifiers = CalcMouseModifiers();
+
+                _data.Browser.GetHost().SendMouseMoveEvent(new CefMouseEvent(0, 0, modifiers), true);
+            }
+
+            public void MouseWheel(GUIMouseWheelEventArgs args)
+            {
+                if (_data == null)
+                    return;
+
+                var modifiers = CalcMouseModifiers();
+                var mouseEvent = new CefMouseEvent(
+                    (int)args.RelativePosition.X, (int)args.RelativePosition.Y,
+                    modifiers);
+
+                _data.Browser.GetHost().SendMouseWheelEvent(
+                    mouseEvent,
+                    (int)args.Delta.X * ScrollSpeed,
+                    (int)args.Delta.Y * ScrollSpeed);
+            }
+
+            public bool RawKeyEvent(in GuiRawKeyEvent guiRawEvent)
+            {
+                if (_data == null)
+                    return false;
+
+                var host = _data.Browser.GetHost();
+
+                if (guiRawEvent.Key is Key.MouseLeft or Key.MouseMiddle or Key.MouseRight)
+                {
+                    var key = guiRawEvent.Key switch
+                    {
+                        Key.MouseLeft => CefMouseButtonType.Left,
+                        Key.MouseMiddle => CefMouseButtonType.Middle,
+                        Key.MouseRight => CefMouseButtonType.Right,
+                        _ => default // not possible
+                    };
+
+                    var mouseEvent = new CefMouseEvent(
+                        guiRawEvent.MouseRelative.X, guiRawEvent.MouseRelative.Y,
+                        CefEventFlags.None);
+
+                    // Logger.Debug($"MOUSE: {guiRawEvent.Action} {guiRawEvent.Key} {guiRawEvent.ScanCode} {key}");
+
+                    // TODO: double click support?
+                    host.SendMouseClickEvent(mouseEvent, key, guiRawEvent.Action == RawKeyAction.Up, 1);
+                }
+                else
+                {
+                    // TODO: Handle left/right modifier keys??
+                    if (!KeyMap.TryGetValue(guiRawEvent.Key, out var vkKey))
+                        vkKey = default;
+
+                    // Logger.Debug($"{guiRawEvent.Action} {guiRawEvent.Key} {guiRawEvent.ScanCode} {vkKey}");
+
+                    var lParam = 0;
+                    lParam |= (guiRawEvent.ScanCode & 0xFF) << 16;
+                    if (guiRawEvent.Action != RawKeyAction.Down)
+                        lParam |= 1 << 30;
+
+                    if (guiRawEvent.Action == RawKeyAction.Up)
+                        lParam |= 1 << 31;
+
+                    var modifiers = CalcModifiers(guiRawEvent.Key);
+
+                    host.SendKeyEvent(new CefKeyEvent
+                    {
+                        // Repeats are sent as key downs, I guess?
+                        EventType = guiRawEvent.Action == RawKeyAction.Up
+                            ? CefKeyEventType.KeyUp
+                            : CefKeyEventType.RawKeyDown,
+                        NativeKeyCode = lParam,
+                        // NativeKeyCode = guiRawEvent.ScanCode,
+                        WindowsKeyCode = (int)vkKey,
+                        IsSystemKey = false, // TODO
+                        Modifiers = modifiers
+                    });
+
+                    if (guiRawEvent.Action != RawKeyAction.Up && guiRawEvent.Key == Key.Return)
+                    {
+                        host.SendKeyEvent(new CefKeyEvent
+                        {
+                            EventType = CefKeyEventType.Char,
+                            WindowsKeyCode = '\r',
+                            NativeKeyCode = lParam,
+                            Modifiers = modifiers
+                        });
+                    }
+                }
+
+                return true;
+            }
+
+            private CefEventFlags CalcModifiers(Key key)
+            {
+                CefEventFlags modifiers = default;
+
+                if (_inputMgr.IsKeyDown(Key.Control))
+                    modifiers |= CefEventFlags.ControlDown;
+
+                if (_inputMgr.IsKeyDown(Key.Alt))
+                    modifiers |= CefEventFlags.AltDown;
+
+                if (_inputMgr.IsKeyDown(Key.Shift))
+                    modifiers |= CefEventFlags.ShiftDown;
+
+                if (_inputMgr.IsKeyDown(Key.Shift))
+                    modifiers |= CefEventFlags.ShiftDown;
+
+                return modifiers;
+            }
+
+            private CefEventFlags CalcMouseModifiers()
+            {
+                CefEventFlags modifiers = default;
+
+                if (_inputMgr.IsKeyDown(Key.Control))
+                    modifiers |= CefEventFlags.ControlDown;
+
+                if (_inputMgr.IsKeyDown(Key.Alt))
+                    modifiers |= CefEventFlags.AltDown;
+
+                if (_inputMgr.IsKeyDown(Key.Shift))
+                    modifiers |= CefEventFlags.ShiftDown;
+
+                if (_inputMgr.IsKeyDown(Key.Shift))
+                    modifiers |= CefEventFlags.ShiftDown;
+
+                if (_inputMgr.IsKeyDown(Key.MouseLeft))
+                    modifiers |= CefEventFlags.LeftMouseButton;
+
+                if (_inputMgr.IsKeyDown(Key.MouseMiddle))
+                    modifiers |= CefEventFlags.MiddleMouseButton;
+
+                if (_inputMgr.IsKeyDown(Key.MouseRight))
+                    modifiers |= CefEventFlags.RightMouseButton;
+
+                return modifiers;
+            }
+
+            public void TextEntered(GUITextEventArgs args)
+            {
+                if (_data == null)
+                    return;
+
+                var host = _data.Browser.GetHost();
+
+                Span<char> buf = stackalloc char[2];
+                var written = args.AsRune.EncodeToUtf16(buf);
+
+                for (var i = 0; i < written; i++)
+                {
+                    host.SendKeyEvent(new CefKeyEvent
+                    {
+                        EventType = CefKeyEventType.Char,
+                        WindowsKeyCode = buf[i],
+                        Character = buf[i],
+                        UnmodifiedCharacter = buf[i]
+                    });
+                }
+            }
+
+            public void Resized()
+            {
+                if (_data == null)
+                    return;
+
+                _data.Browser.GetHost().NotifyMoveOrResizeStarted();
+                _data.Browser.GetHost().WasResized();
+                _data.Texture.Dispose();
+                _data.Texture = _clyde.CreateBlankTexture<Bgra32>((Owner.PixelWidth, Owner.PixelHeight));
+            }
+
+            public void Draw(DrawingHandleScreen handle)
+            {
+                if (_data == null)
+                    return;
+
+                var bufImg = _data.Renderer.Buffer.Buffer;
+
+                _data.Texture.SetSubImage(
+                    Vector2i.Zero,
+                    bufImg,
+                    new UIBox2i(
+                        0, 0,
+                        Math.Min(Owner.PixelWidth, bufImg.Width),
+                        Math.Min(Owner.PixelHeight, bufImg.Height)));
+
+                handle.DrawTexture(_data.Texture, Vector2.Zero);
+            }
+
+            public void StopLoad()
+            {
+                if (_data == null)
+                    throw new InvalidOperationException();
+
+                _data.Browser.StopLoad();
+            }
+
+            public void Reload()
+            {
+                if (_data == null)
+                    throw new InvalidOperationException();
+
+                _data.Browser.Reload();
+            }
+
+            public bool GoBack()
+            {
+                if (_data == null)
+                    throw new InvalidOperationException();
+
+                if (!_data.Browser.CanGoBack)
+                    return false;
+
+                _data.Browser.GoBack();
+                return true;
+            }
+
+            public bool GoForward()
+            {
+                if (_data == null)
+                    throw new InvalidOperationException();
+
+                if (!_data.Browser.CanGoForward)
+                    return false;
+
+                _data.Browser.GoForward();
+                return true;
+            }
+
+            public void ExecuteJavaScript(string code)
+            {
+                if (_data == null)
+                    throw new InvalidOperationException();
+
+                // TODO: this should not run until the browser is done loading seriously does this even work?
+                _data.Browser.GetMainFrame().ExecuteJavaScript(code, string.Empty, 1);
+            }
+
+            public void AddResourceRequestHandler(Action<IRequestHandlerContext> handler)
+            {
+                _requestHandler.AddResourceRequestHandler(handler);
+            }
+
+            public void RemoveResourceRequestHandler(Action<IRequestHandlerContext> handler)
+            {
+                _requestHandler.RemoveResourceRequestHandler(handler);
+            }
+
+            public void AddBeforeBrowseHandler(Action<IBeforeBrowseContext> handler)
+            {
+                _requestHandler.AddBeforeBrowseHandler(handler);
+            }
+
+            public void RemoveBeforeBrowseHandler(Action<IBeforeBrowseContext> handler)
+            {
+                _requestHandler.RemoveBeforeBrowseHandler(handler);
+            }
+
+            private sealed class LiveData
+            {
+                public OwnedTexture Texture;
+                public readonly RobustCefClient Client;
+                public readonly CefBrowser Browser;
+                public readonly ControlRenderHandler Renderer;
+
+                public LiveData(
+                    OwnedTexture texture,
+                    RobustCefClient client,
+                    CefBrowser browser,
+                    ControlRenderHandler renderer)
+                {
+                    Texture = texture;
+                    Client = client;
+                    Browser = browser;
+                    Renderer = renderer;
+                }
+            }
+        }
+
+        private sealed class ControlRenderHandler : CefRenderHandler
+        {
+            public ImageBuffer Buffer { get; }
+            private ControlImpl _control;
+
+            internal ControlRenderHandler(ControlImpl control)
+            {
+                Buffer = new ImageBuffer();
+                _control = control;
+            }
+
+            protected override CefAccessibilityHandler? GetAccessibilityHandler() => null;
+
+            protected override void GetViewRect(CefBrowser browser, out CefRectangle rect)
+            {
+                if (_control.Owner.Disposed)
+                {
+                    rect = new CefRectangle();
+                    return;
+                }
+
+                // TODO CEF: Do we need to pass real screen coords? Cause what we do already works...
+                //var screenCoords = _control.ScreenCoordinates;
+                //rect = new CefRectangle((int) screenCoords.X, (int) screenCoords.Y, (int)Math.Max(_control.Size.X, 1), (int)Math.Max(_control.Size.Y, 1));
+
+                // We do the max between size and 1 because it will LITERALLY CRASH WITHOUT AN ERROR otherwise.
+                rect = new CefRectangle(
+                    0, 0,
+                    (int)Math.Max(_control.Owner.Size.X, 1), (int)Math.Max(_control.Owner.Size.Y, 1));
+            }
+
+            protected override bool GetScreenInfo(CefBrowser browser, CefScreenInfo screenInfo)
+            {
+                if (_control.Owner.Disposed)
+                    return false;
+
+                // TODO CEF: Get actual scale factor?
+                screenInfo.DeviceScaleFactor = 1.0f;
+
+                return true;
+            }
+
+            protected override void OnPopupSize(CefBrowser browser, CefRectangle rect)
+            {
+                if (_control.Owner.Disposed)
+                    return;
+            }
+
+            protected override void OnPaint(CefBrowser browser, CefPaintElementType type, CefRectangle[] dirtyRects,
+                IntPtr buffer, int width, int height)
+            {
+                if (_control.Owner.Disposed)
+                    return;
+
+                foreach (var dirtyRect in dirtyRects)
+                {
+                    Buffer.UpdateBuffer(width, height, buffer, dirtyRect);
+                }
+            }
+
+            protected override void OnAcceleratedPaint(CefBrowser browser, CefPaintElementType type,
+                CefRectangle[] dirtyRects, IntPtr sharedHandle)
+            {
+                // Unused, but we're forced to implement it so.. NOOP.
+            }
+
+            protected override void OnScrollOffsetChanged(CefBrowser browser, double x, double y)
+            {
+                if (_control.Owner.Disposed)
+                    return;
+            }
+
+            protected override void OnImeCompositionRangeChanged(CefBrowser browser, CefRange selectedRange,
+                CefRectangle[] characterBounds)
+            {
+                if (_control.Owner.Disposed)
+                    return;
+            }
+        }
+    }
+}

Robust.Client.WebView/Cef/WebViewManagerCef.cs

@@ -0,0 +1,101 @@
+using System;
+using System.IO;
+using Robust.Shared.ContentPack;
+using Robust.Shared.IoC;
+using Robust.Shared.Log;
+using Xilium.CefGlue;
+
+namespace Robust.Client.WebView.Cef
+{
+    internal partial class WebViewManagerCef : IWebViewManagerImpl
+    {
+        private CefApp _app = default!;
+
+        [Dependency] private readonly IDependencyCollection _dependencyCollection = default!;
+
+        public void Initialize()
+        {
+            IoCManager.Instance!.InjectDependencies(this, oneOff: true);
+
+            string subProcessName;
+            if (OperatingSystem.IsWindows())
+                subProcessName = "Robust.Client.WebView.exe";
+            else if (OperatingSystem.IsLinux())
+                subProcessName = "Robust.Client.WebView";
+            else
+                throw new NotSupportedException("Unsupported platform for CEF!");
+
+            var subProcessPath = PathHelpers.ExecutableRelativeFile(subProcessName);
+            var cefResourcesPath = LocateCefResources();
+
+            // System.Console.WriteLine(AppContext.GetData("NATIVE_DLL_SEARCH_DIRECTORIES"));
+
+            if (cefResourcesPath == null)
+                throw new InvalidOperationException("Unable to locate cef_resources directory!");
+
+            var settings = new CefSettings()
+            {
+                WindowlessRenderingEnabled = true, // So we can render to our UI controls.
+                ExternalMessagePump = false, // Unsure, honestly. TODO CEF: Research this?
+                NoSandbox = true, // Not disabling the sandbox crashes CEF.
+                BrowserSubprocessPath = subProcessPath,
+                LocalesDirPath = Path.Combine(cefResourcesPath, "locales"),
+                ResourcesDirPath = cefResourcesPath,
+                RemoteDebuggingPort = 9222,
+            };
+
+            Logger.Info($"CEF Version: {CefRuntime.ChromeVersion}");
+
+            _app = new RobustCefApp();
+
+            // We pass no main arguments...
+            CefRuntime.Initialize(new CefMainArgs(null), settings, _app, IntPtr.Zero);
+
+            // TODO CEF: After this point, debugging breaks. No, literally. My client crashes but ONLY with the debugger.
+            // I have tried using the DEBUG and RELEASE versions of libcef.so, stripped or non-stripped...
+            // And nothing seemed to work. Odd.
+        }
+
+        private static string? LocateCefResources()
+        {
+            if (ProbeDir(PathHelpers.GetExecutableDirectory(), out var path))
+                return path;
+
+
+            foreach (var searchDir in NativeDllSearchDirectories())
+            {
+                if (ProbeDir(searchDir, out path))
+                    return path;
+            }
+
+            return null;
+
+            static bool ProbeDir(string dir, out string path)
+            {
+                path = Path.Combine(dir, "cef_resources");
+                return Directory.Exists(path);
+            }
+        }
+
+        internal static string[] NativeDllSearchDirectories()
+        {
+            var sepChar = OperatingSystem.IsWindows() ? ';' : ':';
+
+            var searchDirectories = ((string)AppContext.GetData("NATIVE_DLL_SEARCH_DIRECTORIES")!)
+                .Split(sepChar, StringSplitOptions.RemoveEmptyEntries);
+
+            return searchDirectories;
+        }
+
+        public void Update()
+        {
+            // Calling this makes CEF do its work, without using its own update loop.
+            CefRuntime.DoMessageLoopWork();
+        }
+
+        public void Shutdown()
+        {
+            CefRuntime.Shutdown();
+        }
+    }
+}

Robust.Client.WebView/Headless/WebViewManagerHeadless.cs

@@ -0,0 +1,127 @@
+using System;
+using Robust.Client.Graphics;
+using Robust.Client.UserInterface;
+
+namespace Robust.Client.WebView.Headless
+{
+    internal sealed class WebViewManagerHeadless : IWebViewManagerImpl
+    {
+        public IWebViewWindow CreateBrowserWindow(BrowserWindowCreateParameters createParams)
+        {
+            return new WebViewWindowDummy();
+        }
+
+        public IWebViewControlImpl MakeControlImpl(WebViewControl owner)
+        {
+            return new WebViewControlImplDummy();
+        }
+
+        public void Initialize()
+        {
+            // Nop
+        }
+
+        public void Update()
+        {
+            // Nop
+        }
+
+        public void Shutdown()
+        {
+            // Nop
+        }
+
+        private abstract class DummyBase : IWebViewControl
+        {
+            public string Url { get; set; } = "about:blank";
+            public bool IsLoading => true;
+
+            public void StopLoad()
+            {
+            }
+
+            public void Reload()
+            {
+            }
+
+            public bool GoBack()
+            {
+                return false;
+            }
+
+            public bool GoForward()
+            {
+                return false;
+            }
+
+            public void ExecuteJavaScript(string code)
+            {
+            }
+
+            public void AddResourceRequestHandler(Action<IRequestHandlerContext> handler)
+            {
+            }
+
+            public void RemoveResourceRequestHandler(Action<IRequestHandlerContext> handler)
+            {
+            }
+        }
+
+        private sealed class WebViewControlImplDummy : DummyBase, IWebViewControlImpl
+        {
+            public void EnteredTree()
+            {
+            }
+
+            public void ExitedTree()
+            {
+            }
+
+            public void MouseMove(GUIMouseMoveEventArgs args)
+            {
+            }
+
+            public void MouseExited()
+            {
+            }
+
+            public void MouseWheel(GUIMouseWheelEventArgs args)
+            {
+            }
+
+            public bool RawKeyEvent(in GuiRawKeyEvent guiRawEvent)
+            {
+                return false;
+            }
+
+            public void TextEntered(GUITextEventArgs args)
+            {
+            }
+
+            public void Resized()
+            {
+            }
+
+            public void Draw(DrawingHandleScreen handle)
+            {
+            }
+
+            public void AddBeforeBrowseHandler(Action<IBeforeBrowseContext> handler)
+            {
+            }
+
+            public void RemoveBeforeBrowseHandler(Action<IBeforeBrowseContext> handler)
+            {
+            }
+        }
+
+        private sealed class WebViewWindowDummy : DummyBase, IWebViewWindow
+        {
+            public void Dispose()
+            {
+            }
+
+            public bool Closed => false;
+        }
+    }
+}

Robust.Client.WebView/IBeforeBrowseContext.cs

@@ -0,0 +1,12 @@
+namespace Robust.Client.WebView
+{
+    public interface IBeforeBrowseContext
+    {
+        string Url { get; }
+        string Method { get; }
+        bool IsRedirect { get; }
+        bool UserGesture { get; }
+        bool IsCancelled { get; }
+        void DoCancel();
+    }
+}

Robust.Client.WebView/IRequestHandlerContext.cs

@@ -0,0 +1,18 @@
+using System.IO;
+using System.Net;
+
+namespace Robust.Client.WebView
+{
+    public interface IRequestHandlerContext
+    {
+        bool IsNavigation { get; }
+        bool IsDownload { get; }
+        string RequestInitiator { get; }
+        string Url { get; }
+        string Method { get; }
+        bool IsHandled { get; }
+        bool IsCancelled { get; }
+        void DoCancel();
+        void DoRespondStream(Stream stream, string contentType, HttpStatusCode code = HttpStatusCode.OK);
+    }
+}

Robust.Client.WebView/IWebViewControl.cs

@@ -1,8 +1,9 @@
 using System;
+using Robust.Client.WebView.Cef;
 
-namespace Robust.Client.CEF
+namespace Robust.Client.WebView
 {
-    public interface IBrowserControl
+    public interface IWebViewControl
     {
         /// <summary>
         ///     Current URL of the browser. Set to load a new page.
@@ -42,7 +43,7 @@ namespace Robust.Client.CEF
         /// <param name="code">JavaScript code.</param>
         void ExecuteJavaScript(string code);
 
-        void AddResourceRequestHandler(Action<RequestHandlerContext> handler);
-        void RemoveResourceRequestHandler(Action<RequestHandlerContext> handler);
+        void AddResourceRequestHandler(Action<IRequestHandlerContext> handler);
+        void RemoveResourceRequestHandler(Action<IRequestHandlerContext> handler);
     }
 }

Robust.Client.WebView/IWebViewControlImpl.cs

@@ -0,0 +1,24 @@
+using System;
+using Robust.Client.Graphics;
+using Robust.Client.UserInterface;
+
+namespace Robust.Client.WebView
+{
+    /// <summary>
+    /// Internal swappable implementation of <see cref="WebViewControl"/>.
+    /// </summary>
+    internal interface IWebViewControlImpl : IWebViewControl
+    {
+        void EnteredTree();
+        void ExitedTree();
+        void MouseMove(GUIMouseMoveEventArgs args);
+        void MouseExited();
+        void MouseWheel(GUIMouseWheelEventArgs args);
+        bool RawKeyEvent(in GuiRawKeyEvent guiRawEvent);
+        void TextEntered(GUITextEventArgs args);
+        void Resized();
+        void Draw(DrawingHandleScreen handle);
+        void AddBeforeBrowseHandler(Action<IBeforeBrowseContext> handler);
+        void RemoveBeforeBrowseHandler(Action<IBeforeBrowseContext> handler);
+    }
+}

Robust.Client.WebView/IWebViewManager.cs

@@ -0,0 +1,7 @@
+namespace Robust.Client.WebView
+{
+    public interface IWebViewManager
+    {
+        IWebViewWindow CreateBrowserWindow(BrowserWindowCreateParameters createParams);
+    }
+}

Robust.Client.WebView/IWebViewManagerImpl.cs

@@ -0,0 +1,14 @@
+using Robust.Client.WebViewHook;
+
+namespace Robust.Client.WebView
+{
+    /// <summary>
+    /// Internal implementation of WebViewManager that is switched out by <see cref="IWebViewManagerHook"/>.
+    /// </summary>
+    internal interface IWebViewManagerImpl : IWebViewManagerInternal
+    {
+        void Initialize();
+        void Update();
+        void Shutdown();
+    }
+}

Robust.Client.WebView/IWebViewManagerInternal.cs

@@ -0,0 +1,7 @@
+namespace Robust.Client.WebView
+{
+    internal interface IWebViewManagerInternal : IWebViewManager
+    {
+        IWebViewControlImpl MakeControlImpl(WebViewControl owner);
+    }
+}

Robust.Client.WebView/IWebViewWindow.cs

@@ -0,0 +1,9 @@
+using System;
+
+namespace Robust.Client.WebView
+{
+    public interface IWebViewWindow : IWebViewControl, IDisposable
+    {
+        bool Closed { get; }
+    }
+}

Robust.Client.WebView/Robust.Client.WebView.csproj

@@ -0,0 +1,26 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <Import Project="..\MSBuild\Robust.Properties.targets" />
+  <Import Project="..\MSBuild\Robust.Engine.props" />
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+    <PlatformTarget>x64</PlatformTarget>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <OutputType>WinExe</OutputType>
+  </PropertyGroup>
+
+  <Import Project="..\MSBuild\Robust.DefineConstants.targets" />
+  <Target Name="RobustAfterBuild" AfterTargets="Build" />
+  <Import Project="..\MSBuild\Robust.Engine.targets" />
+
+  <ItemGroup>
+    <PackageReference Include="JetBrains.Annotations" Version="2020.3.0" />
+    <PackageReference Include="System.Drawing.Common" Version="5.0.2" />
+    <PackageReference Include="Robust.Natives.Cef" Version="95.7.14" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\cefglue\CefGlue\CefGlue.csproj" />
+    <ProjectReference Include="..\Robust.Client\Robust.Client.csproj" />
+  </ItemGroup>
+</Project>

Robust.Client.WebView/WebViewControl.cs

@@ -0,0 +1,145 @@
+using System;
+using Robust.Client.Graphics;
+using Robust.Client.UserInterface;
+using Robust.Client.WebView.Cef;
+using Robust.Shared.IoC;
+using Robust.Shared.ViewVariables;
+
+namespace Robust.Client.WebView
+{
+    /// <summary>
+    /// An UI control that presents web content.
+    /// </summary>
+    public sealed class WebViewControl : Control, IWebViewControl, IRawInputControl
+    {
+        [Dependency] private readonly IWebViewManagerInternal _webViewManager = default!;
+
+        private readonly IWebViewControlImpl _controlImpl;
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        public string Url
+        {
+            get => _controlImpl.Url;
+            set => _controlImpl.Url = value;
+        }
+
+        [ViewVariables] public bool IsLoading => _controlImpl.IsLoading;
+
+        public WebViewControl()
+        {
+            CanKeyboardFocus = true;
+            KeyboardFocusOnClick = true;
+            MouseFilter = MouseFilterMode.Stop;
+
+            IoCManager.InjectDependencies(this);
+
+            _controlImpl = _webViewManager.MakeControlImpl(this);
+        }
+
+        protected override void EnteredTree()
+        {
+            base.EnteredTree();
+
+            _controlImpl.EnteredTree();
+        }
+
+        protected override void ExitedTree()
+        {
+            base.ExitedTree();
+
+            _controlImpl.ExitedTree();
+        }
+
+        protected internal override void MouseMove(GUIMouseMoveEventArgs args)
+        {
+            base.MouseMove(args);
+
+            _controlImpl.MouseMove(args);
+        }
+
+        protected internal override void MouseExited()
+        {
+            base.MouseExited();
+
+            _controlImpl.MouseExited();
+        }
+
+        protected internal override void MouseWheel(GUIMouseWheelEventArgs args)
+        {
+            base.MouseWheel(args);
+
+            _controlImpl.MouseWheel(args);
+        }
+
+        bool IRawInputControl.RawKeyEvent(in GuiRawKeyEvent guiRawEvent)
+        {
+            return _controlImpl.RawKeyEvent(guiRawEvent);
+        }
+
+        protected internal override void TextEntered(GUITextEventArgs args)
+        {
+            base.TextEntered(args);
+
+            _controlImpl.TextEntered(args);
+        }
+
+        protected override void Resized()
+        {
+            base.Resized();
+
+            _controlImpl.Resized();
+        }
+
+        protected internal override void Draw(DrawingHandleScreen handle)
+        {
+            base.Draw(handle);
+
+            _controlImpl.Draw(handle);
+        }
+
+        public void StopLoad()
+        {
+            _controlImpl.StopLoad();
+        }
+
+        public void Reload()
+        {
+            _controlImpl.Reload();
+        }
+
+        public bool GoBack()
+        {
+            return _controlImpl.GoBack();
+        }
+
+        public bool GoForward()
+        {
+            return _controlImpl.GoForward();
+        }
+
+        public void ExecuteJavaScript(string code)
+        {
+            _controlImpl.ExecuteJavaScript(code);
+        }
+
+        public void AddResourceRequestHandler(Action<IRequestHandlerContext> handler)
+        {
+            _controlImpl.AddResourceRequestHandler(handler);
+        }
+
+        public void RemoveResourceRequestHandler(Action<IRequestHandlerContext> handler)
+        {
+            _controlImpl.RemoveResourceRequestHandler(handler);
+        }
+
+        public void AddBeforeBrowseHandler(Action<IBeforeBrowseContext> handler)
+        {
+            _controlImpl.AddBeforeBrowseHandler(handler);
+        }
+
+        public void RemoveBeforeBrowseHandler(Action<IBeforeBrowseContext> handler)
+        {
+            _controlImpl.RemoveBeforeBrowseHandler(handler);
+        }
+    }
+}

Robust.Client.WebView/WebViewManager.cs

@@ -0,0 +1,59 @@
+using Robust.Client.WebView;
+using Robust.Client.WebView.Cef;
+using Robust.Client.WebView.Headless;
+using Robust.Client.WebViewHook;
+using Robust.Shared.IoC;
+using Robust.Shared.Utility;
+
+[assembly: WebViewManagerImpl(typeof(WebViewManager))]
+
+namespace Robust.Client.WebView
+{
+    internal sealed class WebViewManager : IWebViewManagerInternal, IWebViewManagerHook
+    {
+        private IWebViewManagerImpl? _impl;
+
+        public void Initialize(GameController.DisplayMode mode)
+        {
+            DebugTools.Assert(_impl == null, "WebViewManager has already been initialized!");
+
+            IoCManager.RegisterInstance<IWebViewManager>(this);
+            IoCManager.RegisterInstance<IWebViewManagerInternal>(this);
+
+            if (mode == GameController.DisplayMode.Headless)
+                _impl = new WebViewManagerHeadless();
+            else
+                _impl = new WebViewManagerCef();
+
+            _impl.Initialize();
+        }
+
+        public void Update()
+        {
+            DebugTools.Assert(_impl != null, "WebViewManager has not yet been initialized!");
+
+            _impl!.Update();
+        }
+
+        public void Shutdown()
+        {
+            DebugTools.Assert(_impl != null, "WebViewManager has not yet been initialized!");
+
+            _impl!.Shutdown();
+        }
+
+        public IWebViewWindow CreateBrowserWindow(BrowserWindowCreateParameters createParams)
+        {
+            DebugTools.Assert(_impl != null, "WebViewManager has not yet been initialized!");
+
+            return _impl!.CreateBrowserWindow(createParams);
+        }
+
+        public IWebViewControlImpl MakeControlImpl(WebViewControl owner)
+        {
+            DebugTools.Assert(_impl != null, "WebViewManager has not yet been initialized!");
+
+            return _impl!.MakeControlImpl(owner);
+        }
+    }
+}

Robust.Client/Audio/Midi/MidiManager.cs

@@ -65,7 +65,7 @@ namespace Robust.Client.Audio.Midi
         [Dependency] private readonly IEntityManager _entityManager = default!;
         [Dependency] private readonly IConfigurationManager _cfgMan = default!;
 
-        private SharedBroadphaseSystem _broadPhaseSystem = default!;
+        private SharedPhysicsSystem _broadPhaseSystem = default!;
 
         [ViewVariables]
         public bool IsAvailable
@@ -88,6 +88,7 @@ namespace Robust.Client.Audio.Midi
         private float _volume = 0f;
         private bool _volumeDirty = true;
 
+        // Not reliable until Fluidsynth is initialized!
         [ViewVariables(VVAccess.ReadWrite)]
         public float Volume
         {
@@ -134,6 +135,7 @@ namespace Robust.Client.Audio.Midi
         {
             if (FluidsynthInitialized || _failedInitialize) return;
 
+            _volume = _cfgMan.GetCVar(CVars.MidiVolume);
             _cfgMan.OnValueChanged(CVars.MidiVolume, value =>
             {
                 _volume = value;
@@ -175,7 +177,7 @@ namespace Robust.Client.Audio.Midi
             _midiThread = new Thread(ThreadUpdate);
             _midiThread.Start();
 
-            _broadPhaseSystem = EntitySystem.Get<SharedBroadphaseSystem>();
+            _broadPhaseSystem = EntitySystem.Get<SharedPhysicsSystem>();
             FluidsynthInitialized = true;
         }
 
@@ -254,11 +256,12 @@ namespace Robust.Client.Audio.Midi
                         renderer.LoadSoundfont(WindowsSoundfont, true);
                 }
 
+                renderer.Source.SetVolume(Volume);
+
                 lock (_renderers)
                 {
                     _renderers.Add(renderer);
                 }
-
                 return renderer;
             }
             finally

Robust.Client/Audio/Midi/MidiRenderer.cs

@@ -37,6 +37,11 @@ namespace Robust.Client.Audio.Midi
         /// </summary>
         bool LoopMidi { get; set; }
 
+        /// <summary>
+        ///     This increases all note on velocities to 127.
+        /// </summary>
+        bool VolumeBoost { get; set; }
+
         /// <summary>
         ///     The midi program (instrument) the renderer is using.
         /// </summary>
@@ -297,6 +302,9 @@ namespace Robust.Client.Audio.Midi
             }
         }
 
+        [ViewVariables(VVAccess.ReadWrite)]
+        public bool VolumeBoost { get; set; }
+
         [ViewVariables(VVAccess.ReadWrite)]
         public IEntity? TrackingEntity { get; set; } = null;
 
@@ -539,6 +547,8 @@ namespace Robust.Client.Audio.Midi
 
                         // Note On 0x90
                         case 144:
+                            if (VolumeBoost)
+                                midiEvent.Velocity = 127;
                             _synth.NoteOn(midiEvent.Channel, midiEvent.Key, midiEvent.Velocity);
                             break;
 

Robust.Client/BaseClient.cs

@@ -31,7 +31,6 @@ namespace Robust.Client
         [Dependency] private readonly IDiscordRichPresence _discord = default!;
         [Dependency] private readonly IGameTiming _timing = default!;
         [Dependency] private readonly IClientGameStateManager _gameStates = default!;
-        [Dependency] private readonly IDebugDrawingManager _debugDrawMan = default!;
 
         /// <inheritdoc />
         public ushort DefaultPort { get; } = 1212;
@@ -57,7 +56,6 @@ namespace Robust.Client
             _configManager.OnValueChanged(CVars.NetTickrate, TickRateChanged, invokeImmediately: true);
 
             _playMan.Initialize();
-            _debugDrawMan.Initialize();
             Reset();
         }
 

Robust.Client/ClientIoC.cs

@@ -72,7 +72,6 @@ namespace Robust.Client
             IoCManager.Register<IUserInterfaceManager, UserInterfaceManager>();
             IoCManager.Register<IUserInterfaceManagerInternal, UserInterfaceManager>();
             IoCManager.Register<IDebugDrawing, DebugDrawing>();
-            IoCManager.Register<IDebugDrawingManager, DebugDrawingManager>();
             IoCManager.Register<ILightManager, LightManager>();
             IoCManager.Register<IDiscordRichPresence, DiscordRichPresence>();
             IoCManager.Register<IMidiManager, MidiManager>();

Robust.Client/Console/Commands/Debug.cs

@@ -188,16 +188,16 @@ namespace Robust.Client.Console.Commands
                 return;
             }
 
-            if (!int.TryParse(args[0], out var id))
+            if (!float.TryParse(args[0], out var duration))
             {
-                shell.WriteError($"{args[0]} is not a valid integer.");
+                shell.WriteError($"{args[0]} is not a valid float.");
                 return;
             }
 
-            var mgr = IoCManager.Resolve<IDebugDrawingManager>();
+            var mgr = EntitySystem.Get<DebugRayDrawingSystem>();
             mgr.DebugDrawRays = !mgr.DebugDrawRays;
-            shell.WriteError("Toggled showing rays to:" + mgr.DebugDrawRays.ToString());
-            mgr.DebugRayLifetime = TimeSpan.FromSeconds((double)int.Parse(args[0], CultureInfo.InvariantCulture));
+            shell.WriteError("Toggled showing rays to:" + mgr.DebugDrawRays);
+            mgr.DebugRayLifetime = TimeSpan.FromSeconds(duration);
         }
     }
 

Robust.Client/Console/Commands/HelpCommands.cs

@@ -63,7 +63,7 @@ namespace Robust.Client.Console.Commands
 
             var conGroup = IoCManager.Resolve<IClientConGroupController>();
             foreach (var command in shell.ConsoleHost.RegisteredCommands.Values
-                .Where(p => p.Command.Contains(filter) && conGroup.CanCommand(p.Command))
+                .Where(p => p.Command.Contains(filter) && (p is not ServerDummyCommand || conGroup.CanCommand(p.Command)))
                 .OrderBy(c => c.Command))
             {
                 shell.WriteLine(command.Command + ": " + command.Description);

Robust.Client/Console/Commands/PhysicsOverlayCommands.cs

@@ -8,7 +8,7 @@ namespace Robust.Client.Console.Commands
     {
         public string Command => "physics";
         public string Description => $"Shows a debug physics overlay. The arg supplied specifies the overlay.";
-        public string Help => $"{Command} <contactnormals / contactpoints / shapes / shapeinfo>";
+        public string Help => $"{Command} <aabbs / contactnormals / contactpoints / joints / shapeinfo / shapes>";
         public void Execute(IConsoleShell shell, string argStr, string[] args)
         {
             if (args.Length != 1)
@@ -21,18 +21,24 @@ namespace Robust.Client.Console.Commands
 
             switch (args[0])
             {
+                case "aabbs":
+                    system.Flags ^= PhysicsDebugFlags.AABBs;
+                    break;
                 case "contactnormals":
                     system.Flags ^= PhysicsDebugFlags.ContactNormals;
                     break;
                 case "contactpoints":
                     system.Flags ^= PhysicsDebugFlags.ContactPoints;
                     break;
-                case "shapes":
-                    system.Flags ^= PhysicsDebugFlags.Shapes;
+                case "joints":
+                    system.Flags ^= PhysicsDebugFlags.Joints;
                     break;
                 case "shapeinfo":
                     system.Flags ^= PhysicsDebugFlags.ShapeInfo;
                     break;
+                case "shapes":
+                    system.Flags ^= PhysicsDebugFlags.Shapes;
+                    break;
                 default:
                     shell.WriteLine($"{args[0]} is not a recognised overlay");
                     return;

Robust.Client/Console/Completions.cs

@@ -0,0 +1,127 @@
+using System;
+using System.Collections.Immutable;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.CustomControls;
+using Robust.Shared.Input;
+using Robust.Shared.Maths;
+using Robust.Shared.Network.Messages;
+using Robust.Shared.Utility;
+using static Robust.Client.UserInterface.Controls.BoxContainer;
+using static Robust.Shared.Network.Messages.MsgScriptCompletionResponse;
+
+namespace Robust.Client.Console
+{
+    public class Completions : SS14Window
+    {
+        private HistoryLineEdit _textBar;
+        private ScrollContainer _suggestPanel = new()
+        {
+            HScrollEnabled = false,
+        };
+
+        private BoxContainer _suggestBox = new()
+        {
+            Orientation = LayoutOrientation.Vertical,
+            HorizontalAlignment = HAlignment.Left,
+        };
+
+        public Completions(HistoryLineEdit textBar) : base()
+        {
+            Title = "Suggestions";
+            MouseFilter = MouseFilterMode.Pass;
+
+            _textBar = textBar;
+            _suggestPanel.AddChild(_suggestBox);
+            ContentsContainer.AddChild(_suggestPanel);
+        }
+
+        private bool _firstopen = true;
+        public void OpenAt(Vector2 position, Vector2 size)
+        {
+            if (_firstopen)
+            {
+                SetSize = size;
+                LayoutContainer.SetPosition(this, position);
+                _firstopen = false;
+            }
+            Open();
+        }
+
+        private ImmutableArray<LiteResult> _results;
+
+        public void Update()
+        {
+            _suggestBox.RemoveAllChildren();
+            foreach (var res in _results)
+            {
+                var label = new Entry(res);
+
+                label.OnKeyBindDown += ev =>
+                {
+                    if (ev.Function == EngineKeyFunctions.UIClick)
+                        _textBar.InsertAtCursor(label.Result.Properties["InsertionText"]);
+                };
+
+                _suggestBox.AddChild(label);
+            }
+        }
+
+        public void TextChanged() => Close();
+
+        public void SetSuggestions(MsgScriptCompletionResponse response)
+        {
+            _results = response.Results;
+            Update();
+        }
+
+        // Label and ghetto button.
+        public class Entry : RichTextLabel
+        {
+            public readonly LiteResult Result;
+
+            public Entry(LiteResult result)
+            {
+                MouseFilter = MouseFilterMode.Stop;
+                Result = result;
+                var compl = new FormattedMessage();
+                var dim = Color.FromHsl((0f, 0f, 0.8f, 1f));
+
+                // warning: ew ahead
+                string basen = "default";
+                if (Result.Tags.Contains("Interface"))
+                    basen = "interface name";
+                else if (Result.Tags.Contains("Class"))
+                    basen = "class name";
+                else if (Result.Tags.Contains("Struct"))
+                    basen = "struct name";
+                else if (Result.Tags.Contains("Keyword"))
+                    basen = "keyword";
+                else if (Result.Tags.Contains("Namespace"))
+                    basen = "namespace name";
+                else if (Result.Tags.Contains("Method"))
+                    basen = "method name";
+                else if (Result.Tags.Contains("Property"))
+                    basen = "property name";
+                else if (Result.Tags.Contains("Field"))
+                    basen = "field name";
+
+                Color basec = ScriptingColorScheme.ColorScheme[basen];
+                compl.PushColor(basec * dim);
+                compl.AddText(Result.DisplayTextPrefix);
+                compl.PushColor(basec);
+                compl.AddText(Result.DisplayText);
+                compl.PushColor(basec * dim);
+                compl.AddText(Result.DisplayTextSuffix);
+                compl.AddText(" [" + String.Join(", ", Result.Tags) + "]");
+                if (Result.InlineDescription.Length != 0)
+                {
+                    compl.PushNewline();
+                    compl.AddText(": ");
+                    compl.PushColor(Color.LightSlateGray);
+                    compl.AddText(Result.InlineDescription);
+                }
+                SetMessage(compl);
+            }
+        }
+    }
+}

Robust.Client/Console/ScriptClient.ScriptConsoleServer.cs

@@ -46,6 +46,16 @@ namespace Robust.Client.Console
 
             }
 
+            protected override void Complete()
+            {
+                var msg = _client._netManager.CreateNetMessage<MsgScriptCompletion>();
+                msg.ScriptSession = _session;
+                msg.Code = InputBar.Text;
+                msg.Cursor = InputBar.CursorPosition;
+
+                _client._netManager.ClientSendMessage(msg);
+            }
+
             public override void Close()
             {
                 base.Close();
@@ -95,6 +105,12 @@ namespace Robust.Client.Console
 
                 OutputPanel.AddText(">");
             }
+
+            public void ReceiveCompletionResponse(MsgScriptCompletionResponse response)
+            {
+                Suggestions.SetSuggestions(response);
+                Suggestions.OpenAt((Position.X + Size.X, Position.Y), (Size.X / 2, Size.Y));
+            }
         }
     }
 }

Robust.Client/Console/ScriptClient.cs

@@ -20,6 +20,8 @@ namespace Robust.Client.Console
             _netManager.RegisterNetMessage<MsgScriptStop>();
             _netManager.RegisterNetMessage<MsgScriptEval>();
             _netManager.RegisterNetMessage<MsgScriptStart>();
+            _netManager.RegisterNetMessage<MsgScriptCompletion>();
+            _netManager.RegisterNetMessage<MsgScriptCompletionResponse>(ReceiveScriptCompletionResponse);
             _netManager.RegisterNetMessage<MsgScriptResponse>(ReceiveScriptResponse);
             _netManager.RegisterNetMessage<MsgScriptStartAck>(ReceiveScriptStartAckResponse);
         }
@@ -44,6 +46,16 @@ namespace Robust.Client.Console
             console.ReceiveResponse(message);
         }
 
+        private void ReceiveScriptCompletionResponse(MsgScriptCompletionResponse message)
+        {
+            if (!_activeConsoles.TryGetValue(message.ScriptSession, out var console))
+            {
+                return;
+            }
+
+            console.ReceiveCompletionResponse(message);
+        }
+
         public bool CanScript => _conGroupController.CanScript();
 
         public void StartSession()

Robust.Client/Console/ScriptConsoleClient.cs

@@ -53,6 +53,9 @@ namespace Robust.Client.Console
             OutputPanel.AddText(">");
         }
 
+        // No-op for now.
+        protected override void Complete() { }
+
         protected override async void Run()
         {
             var code = InputBar.Text;

Robust.Client/Debugging/DebugPhysicsSystem.cs

@@ -58,6 +58,7 @@ using Robust.Shared.Physics.Collision;
 using Robust.Shared.Physics.Collision.Shapes;
 using Robust.Shared.Physics.Dynamics;
 using Robust.Shared.Physics.Dynamics.Contacts;
+using Robust.Shared.Physics.Dynamics.Joints;
 
 namespace Robust.Client.Debugging
 {
@@ -84,11 +85,12 @@ namespace Robust.Client.Debugging
                 if (_flags == PhysicsDebugFlags.None)
                     IoCManager.Resolve<IOverlayManager>().AddOverlay(
                         new PhysicsDebugOverlay(
+                            EntityManager,
                             IoCManager.Resolve<IEyeManager>(),
                             IoCManager.Resolve<IInputManager>(),
                             IoCManager.Resolve<IResourceCache>(),
                             this,
-                            Get<SharedBroadphaseSystem>()));
+                            Get<SharedPhysicsSystem>()));
 
                 if (value == PhysicsDebugFlags.None)
                     IoCManager.Resolve<IOverlayManager>().RemoveOverlay(typeof(PhysicsDebugOverlay));
@@ -158,25 +160,33 @@ namespace Robust.Client.Debugging
         /// </summary>
         Shapes = 1 << 2,
         ShapeInfo = 1 << 3,
+        Joints = 1 << 4,
+        AABBs = 1 << 5,
     }
 
     internal sealed class PhysicsDebugOverlay : Overlay
     {
+        private IEntityManager _entityManager = default!;
         private IEyeManager _eyeManager = default!;
         private IInputManager _inputManager = default!;
-        private DebugPhysicsSystem _physics = default!;
-        private SharedBroadphaseSystem _broadphaseSystem = default!;
+        private DebugPhysicsSystem _debugPhysicsSystem = default!;
+        private SharedPhysicsSystem _physicsSystem = default!;
 
         public override OverlaySpace Space => OverlaySpace.WorldSpace | OverlaySpace.ScreenSpace;
 
+        private static readonly Color JointColor = new(0.5f, 0.8f, 0.8f);
+
         private readonly Font _font;
 
-        public PhysicsDebugOverlay(IEyeManager eyeManager, IInputManager inputManager, IResourceCache cache, DebugPhysicsSystem system, SharedBroadphaseSystem broadphaseSystem)
+        private HashSet<Joint> _drawnJoints = new();
+
+        public PhysicsDebugOverlay(IEntityManager entityManager, IEyeManager eyeManager, IInputManager inputManager, IResourceCache cache, DebugPhysicsSystem system, SharedPhysicsSystem physicsSystem)
         {
+            _entityManager = entityManager;
             _eyeManager = eyeManager;
             _inputManager = inputManager;
-            _physics = system;
-            _broadphaseSystem = broadphaseSystem;
+            _debugPhysicsSystem = system;
+            _physicsSystem = physicsSystem;
             _font = new VectorFont(cache.GetResource<FontResource>("/Fonts/NotoSans/NotoSans-Regular.ttf"), 10);
         }
 
@@ -186,9 +196,9 @@ namespace Robust.Client.Debugging
             var viewBounds = _eyeManager.GetWorldViewbounds();
             var mapId = _eyeManager.CurrentMap;
 
-            if ((_physics.Flags & PhysicsDebugFlags.Shapes) != 0 && !viewport.IsEmpty())
+            if ((_debugPhysicsSystem.Flags & PhysicsDebugFlags.Shapes) != 0 && !viewport.IsEmpty())
             {
-                foreach (var physBody in _broadphaseSystem.GetCollidingEntities(mapId, viewBounds))
+                foreach (var physBody in _physicsSystem.GetCollidingEntities(mapId, viewBounds))
                 {
                     if (physBody.Owner.HasComponent<MapGridComponent>()) continue;
 
@@ -227,17 +237,62 @@ namespace Robust.Client.Debugging
                 }
             }
 
-            if ((_physics.Flags & (PhysicsDebugFlags.ContactPoints | PhysicsDebugFlags.ContactNormals)) != 0)
+            if ((_debugPhysicsSystem.Flags & PhysicsDebugFlags.AABBs) != 0 && !viewport.IsEmpty())
+            {
+                foreach (var physBody in _physicsSystem.GetCollidingEntities(mapId, viewBounds))
+                {
+                    if (physBody.Owner.HasComponent<MapGridComponent>()) continue;
+
+                    var xform = physBody.GetTransform();
+
+                    const float AlphaModifier = 0.2f;
+                    Box2? aabb = null;
+
+                    foreach (var fixture in physBody.Fixtures)
+                    {
+                        for (var i = 0; i < fixture.Shape.ChildCount; i++)
+                        {
+                            var shapeBB = fixture.Shape.ComputeAABB(xform, i);
+                            aabb = aabb?.Union(shapeBB) ?? shapeBB;
+                        }
+                    }
+
+                    if (aabb == null) continue;
+
+                    worldHandle.DrawRect(aabb.Value, Color.Red.WithAlpha(AlphaModifier), false);
+                }
+            }
+
+            if ((_debugPhysicsSystem.Flags & PhysicsDebugFlags.Joints) != 0x0)
+            {
+                _drawnJoints.Clear();
+
+                foreach (var jointComponent in _entityManager.EntityQuery<JointComponent>(true))
+                {
+                    if (jointComponent.JointCount == 0 ||
+                        !_entityManager.TryGetComponent(jointComponent.Owner.Uid, out TransformComponent? xf1) ||
+                        !viewport.Contains(xf1.WorldPosition)) continue;
+
+                    foreach (var (_, joint) in jointComponent.Joints)
+                    {
+                        if (_drawnJoints.Contains(joint)) continue;
+                        DrawJoint(worldHandle, joint);
+                        _drawnJoints.Add(joint);
+                    }
+                }
+            }
+
+            if ((_debugPhysicsSystem.Flags & (PhysicsDebugFlags.ContactPoints | PhysicsDebugFlags.ContactNormals)) != 0)
             {
                 const float axisScale = 0.3f;
 
-                for (var i = 0; i < _physics.PointCount; ++i)
+                for (var i = 0; i < _debugPhysicsSystem.PointCount; ++i)
                 {
-                    var point = _physics.Points[i];
+                    var point = _debugPhysicsSystem.Points[i];
 
                     const float radius = 0.1f;
 
-                    if ((_physics.Flags & PhysicsDebugFlags.ContactPoints) != 0)
+                    if ((_debugPhysicsSystem.Flags & PhysicsDebugFlags.ContactPoints) != 0)
                     {
                         if (point.State == PointState.Add)
                             worldHandle.DrawCircle(point.Position, radius, new Color(255, 77, 243, 255));
@@ -245,7 +300,7 @@ namespace Robust.Client.Debugging
                             worldHandle.DrawCircle(point.Position, radius, new Color(255, 77, 77, 255));
                     }
 
-                    if ((_physics.Flags & PhysicsDebugFlags.ContactNormals) != 0)
+                    if ((_debugPhysicsSystem.Flags & PhysicsDebugFlags.ContactNormals) != 0)
                     {
                         Vector2 p1 = point.Position;
                         Vector2 p2 = p1 + point.Normal * axisScale;
@@ -253,7 +308,7 @@ namespace Robust.Client.Debugging
                     }
                 }
 
-                _physics.PointCount = 0;
+                _debugPhysicsSystem.PointCount = 0;
             }
         }
 
@@ -262,12 +317,12 @@ namespace Robust.Client.Debugging
             var mapId = _eyeManager.CurrentMap;
             var mousePos = _inputManager.MouseScreenPosition;
 
-            if ((_physics.Flags & PhysicsDebugFlags.ShapeInfo) != 0x0)
+            if ((_debugPhysicsSystem.Flags & PhysicsDebugFlags.ShapeInfo) != 0x0)
             {
                 var hoverBodies = new List<PhysicsComponent>();
                 var bounds = Box2.UnitCentered.Translated(_eyeManager.ScreenToMap(mousePos.Position).Position);
 
-                foreach (var physBody in _broadphaseSystem.GetCollidingEntities(mapId, bounds))
+                foreach (var physBody in _physicsSystem.GetCollidingEntities(mapId, bounds))
                 {
                     if (physBody.Owner.HasComponent<MapGridComponent>()) continue;
                     hoverBodies.Add(physBody);
@@ -299,7 +354,7 @@ namespace Robust.Client.Debugging
 
         protected internal override void Draw(in OverlayDrawArgs args)
         {
-            if (_physics.Flags == PhysicsDebugFlags.None) return;
+            if (_debugPhysicsSystem.Flags == PhysicsDebugFlags.None) return;
 
             switch (args.Space)
             {
@@ -346,5 +401,32 @@ namespace Robust.Client.Debugging
                     return;
             }
         }
+
+        private void DrawJoint(DrawingHandleWorld worldHandle, Joint joint)
+        {
+            if (!_entityManager.TryGetComponent(joint.BodyAUid, out TransformComponent? xform1) ||
+                !_entityManager.TryGetComponent(joint.BodyBUid, out TransformComponent? xform2)) return;
+
+            var matrix1 = xform1.WorldMatrix;
+            var matrix2 = xform2.WorldMatrix;
+
+            var xf1 = new Vector2(matrix1.R0C2, matrix1.R1C2);
+            var xf2 = new Vector2(matrix2.R0C2, matrix2.R1C2);
+
+            var p1 = matrix1.Transform(joint.LocalAnchorA);
+            var p2 = matrix2.Transform(joint.LocalAnchorB);
+
+            switch (joint)
+            {
+                case DistanceJoint:
+                    worldHandle.DrawLine(xf1, xf2, JointColor);
+                    break;
+                default:
+                    worldHandle.DrawLine(xf1, p1, JointColor);
+                    worldHandle.DrawLine(p1, p2, JointColor);
+                    worldHandle.DrawLine(xf2, p2, JointColor);
+                    break;
+            }
+        }
     }
 }

Robust.Client/Debugging/DebugRayDrawingSystem.cs

@@ -2,21 +2,22 @@ using System;
 using System.Collections.Generic;
 using Robust.Client.Graphics;
 using Robust.Shared.Enums;
+using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
 using Robust.Shared.Maths;
 using Robust.Shared.Network;
 using Robust.Shared.Network.Messages;
+using Robust.Shared.Physics;
 using Robust.Shared.Timing;
 
 namespace Robust.Client.Debugging
 {
-    internal class DebugDrawingManager : IDebugDrawingManager
+    internal sealed class DebugRayDrawingSystem : EntitySystem
     {
-        [Dependency] private readonly IClientNetManager _net = default!;
         [Dependency] private readonly IOverlayManager _overlayManager = default!;
         [Dependency] private readonly IGameTiming _gameTimer = default!;
 
-        private readonly List<RayWithLifetime> raysWithLifeTime = new();
+        private readonly List<RayWithLifetime> _raysWithLifeTime = new();
         private bool _debugDrawRays;
 
         private struct RayWithLifetime
@@ -52,9 +53,30 @@ namespace Robust.Client.Debugging
 
         public TimeSpan DebugRayLifetime { get; set; } = TimeSpan.FromSeconds(5);
 
-        public void Initialize()
+        public override void Initialize()
         {
-            _net.RegisterNetMessage<MsgRay>(HandleDrawRay);
+            base.Initialize();
+            SubscribeNetworkEvent<MsgRay>(HandleDrawRay);
+            // To catch anything that's client-only and not sent by the server.
+            SubscribeLocalEvent<DebugDrawRayMessage>(OnDebugDrawRay);
+        }
+
+        private void OnDebugDrawRay(DebugDrawRayMessage ev)
+        {
+            if (!_debugDrawRays)
+            {
+                return;
+            }
+
+            var newRayWithLifetime = new RayWithLifetime
+            {
+                DidActuallyHit = ev.Data.Results != null,
+                RayOrigin = ev.Data.Ray.Position,
+                RayHit = ev.Data.Results?.HitPos ?? ev.Data.Ray.Direction * ev.Data.MaxLength + ev.Data.Ray.Position,
+                LifeTime = _gameTimer.RealTime + DebugRayLifetime
+            };
+
+            _raysWithLifeTime.Add(newRayWithLifetime);
         }
 
         private void HandleDrawRay(MsgRay msg)
@@ -74,15 +96,15 @@ namespace Robust.Client.Debugging
                 LifeTime = _gameTimer.RealTime + DebugRayLifetime
             };
 
-            raysWithLifeTime.Add(newRayWithLifetime);
+            _raysWithLifeTime.Add(newRayWithLifetime);
         }
 
         private sealed class DebugDrawRayOverlay : Overlay
         {
-            private readonly DebugDrawingManager _owner;
+            private readonly DebugRayDrawingSystem _owner;
             public override OverlaySpace Space => OverlaySpace.WorldSpace;
 
-            public DebugDrawRayOverlay(DebugDrawingManager owner)
+            public DebugDrawRayOverlay(DebugRayDrawingSystem owner)
             {
                 _owner = owner;
             }
@@ -90,7 +112,7 @@ namespace Robust.Client.Debugging
             protected internal override void Draw(in OverlayDrawArgs args)
             {
                 var handle = args.WorldHandle;
-                foreach (var ray in _owner.raysWithLifeTime)
+                foreach (var ray in _owner._raysWithLifeTime)
                 {
                     handle.DrawLine(
                         ray.RayOrigin,
@@ -103,7 +125,7 @@ namespace Robust.Client.Debugging
             {
                 base.FrameUpdate(args);
 
-                _owner.raysWithLifeTime.RemoveAll(r => r.LifeTime < _owner._gameTimer.RealTime);
+                _owner._raysWithLifeTime.RemoveAll(r => r.LifeTime < _owner._gameTimer.RealTime);
             }
         }
     }

Robust.Client/Debugging/IDebugDrawingManager.cs

@@ -1,11 +0,0 @@
-using System;
-
-namespace Robust.Client.Debugging
-{
-    public interface IDebugDrawingManager
-    {
-        bool DebugDrawRays { get; set; }
-        TimeSpan DebugRayLifetime { get; set; }
-        void Initialize();
-    }
-}

Robust.Client/GameController/GameController.RobustModules.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Reflection;
+using Robust.Client.WebViewHook;
+using Robust.Shared.Log;
+using Robust.Shared.Utility;
+
+namespace Robust.Client
+{
+    internal sealed partial class GameController
+    {
+        private void LoadOptionalRobustModules(GameController.DisplayMode mode)
+        {
+            // In the future, this manifest should be loaded somewhere else and used for more parts of init.
+            // For now, this is fine.
+            var manifest = LoadResourceManifest();
+
+            foreach (var module in manifest.Modules)
+            {
+                switch (module)
+                {
+                    case "Robust.Client.WebView":
+                        LoadRobustWebView(mode);
+                        break;
+                    default:
+                        Logger.Error($"Unknown Robust module: {module}");
+                        return;
+                }
+            }
+        }
+
+        private void LoadRobustWebView(GameController.DisplayMode mode)
+        {
+            Logger.Debug("Loading Robust.Client.WebView");
+
+            var assembly = LoadRobustModuleAssembly("Robust.Client.WebView");
+            var attribute = assembly.GetCustomAttribute<WebViewManagerImplAttribute>()!;
+            DebugTools.AssertNotNull(attribute);
+
+            var managerType = attribute.ImplementationType;
+            _webViewHook = (IWebViewManagerHook)Activator.CreateInstance(managerType)!;
+            _webViewHook.Initialize(mode);
+
+            Logger.Debug("Done initializing Robust.Client.WebView");
+        }
+
+        private Assembly LoadRobustModuleAssembly(string assemblyName)
+        {
+            // TODO: Launcher distribution and all that stuff.
+            return Assembly.Load(assemblyName);
+        }
+    }
+}

Robust.Client/GameController/GameController.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Collections.Generic;
 using System.IO;
 using System.Net;
 using System.Runtime;
@@ -11,12 +10,12 @@ using Robust.Client.GameStates;
 using Robust.Client.Graphics;
 using Robust.Client.Input;
 using Robust.Client.Placement;
-using Robust.Client.Player;
 using Robust.Client.ResourceManagement;
 using Robust.Client.State;
 using Robust.Client.UserInterface;
 using Robust.Client.Utility;
 using Robust.Client.ViewVariables;
+using Robust.Client.WebViewHook;
 using Robust.LoaderApi;
 using Robust.Shared;
 using Robust.Shared.Asynchronous;
@@ -32,6 +31,7 @@ using Robust.Shared.Serialization;
 using Robust.Shared.Serialization.Manager;
 using Robust.Shared.Timing;
 using Robust.Shared.Utility;
+using YamlDotNet.RepresentationModel;
 
 namespace Robust.Client
 {
@@ -67,6 +67,8 @@ namespace Robust.Client
         [Dependency] private readonly IMidiManager _midiManager = default!;
         [Dependency] private readonly IEyeManager _eyeManager = default!;
 
+        private IWebViewManagerHook? _webViewHook;
+
         private CommandLineArgs? _commandLineArgs;
 
         // Arguments for loader-load. Not used otherwise.
@@ -87,7 +89,7 @@ namespace Robust.Client
             _clyde.SetWindowTitle(Options.DefaultWindowTitle);
 
             _taskManager.Initialize();
-            _fontManager.SetFontDpi((uint) _configurationManager.GetCVar(CVars.DisplayFontDpi));
+            _fontManager.SetFontDpi((uint)_configurationManager.GetCVar(CVars.DisplayFontDpi));
 
             // Disable load context usage on content start.
             // This prevents Content.Client being loaded twice and things like csi blowing up because of it.
@@ -107,6 +109,9 @@ namespace Robust.Client
 
             IoCManager.Resolve<ISerializationManager>().Initialize();
 
+            // Load optional Robust modules.
+            LoadOptionalRobustModules(displayMode);
+
             // Call Init in game assemblies.
             _modLoader.BroadcastRunLevel(ModRunLevel.PreInit);
             _modLoader.BroadcastRunLevel(ModRunLevel.Init);
@@ -196,6 +201,39 @@ namespace Robust.Client
             return true;
         }
 
+        private ResourceManifestData LoadResourceManifest()
+        {
+            // Parses /manifest.yml for game-specific settings that cannot be exclusively set up by content code.
+            if (!_resourceCache.TryContentFileRead("/manifest.yml", out var stream))
+                return new ResourceManifestData(Array.Empty<string>());
+
+            var yamlStream = new YamlStream();
+            using (stream)
+            {
+                using var streamReader = new StreamReader(stream, EncodingHelpers.UTF8);
+                yamlStream.Load(streamReader);
+            }
+
+            if (yamlStream.Documents.Count != 1 || yamlStream.Documents[0].RootNode is not YamlMappingNode mapping)
+            {
+                throw new InvalidOperationException(
+                    "Expected a single YAML document with root mapping for /manifest.yml");
+            }
+
+            var modules = Array.Empty<string>();
+            if (mapping.TryGetNode("modules", out var modulesMap))
+            {
+                var sequence = (YamlSequenceNode)modulesMap;
+                modules = new string[sequence.Children.Count];
+                for (var i = 0; i < modules.Length; i++)
+                {
+                    modules[i] = sequence[i].AsString();
+                }
+            }
+
+            return new ResourceManifestData(modules);
+        }
+
         internal bool StartupSystemSplash(GameControllerOptions options, Func<ILogHandler>? logHandlerFactory)
         {
             Options = options;
@@ -217,8 +255,10 @@ namespace Robust.Client
                             System.Console.WriteLine($"LogLevel {level} does not exist!");
                             continue;
                         }
+
                         logLevel = result;
                     }
+
                     _logManager.GetSawmill(sawmill).Level = logLevel;
                 }
             }
@@ -259,7 +299,7 @@ namespace Robust.Client
 
             {
                 // Handle GameControllerOptions implicit CVar overrides.
-                _configurationManager.OverrideConVars(new []
+                _configurationManager.OverrideConVars(new[]
                 {
                     (CVars.DisplayWindowIconSet.Name, options.WindowIconSet.ToString()),
                     (CVars.DisplaySplashLogo.Name, options.SplashLogo.ToString())
@@ -271,9 +311,11 @@ namespace Robust.Client
             _resourceCache.Initialize(Options.LoadConfigAndUserData ? userDataDir : null);
 
             var mountOptions = _commandLineArgs != null
-                ? MountOptions.Merge(_commandLineArgs.MountOptions, Options.MountOptions) : Options.MountOptions;
+                ? MountOptions.Merge(_commandLineArgs.MountOptions, Options.MountOptions)
+                : Options.MountOptions;
 
-            ProgramShared.DoMounts(_resourceCache, mountOptions, Options.ContentBuildDirectory, Options.AssemblyDirectory,
+            ProgramShared.DoMounts(_resourceCache, mountOptions, Options.ContentBuildDirectory,
+                Options.AssemblyDirectory,
                 Options.LoadContentResources, _loaderArgs != null && !Options.ResourceMountDisabled, ContentStart);
 
             if (_loaderArgs != null)
@@ -394,6 +436,7 @@ namespace Robust.Client
 
         private void Update(FrameEventArgs frameEventArgs)
         {
+            _webViewHook?.Update();
             _clyde.FrameProcess(frameEventArgs);
             _modLoader.BroadcastUpdate(ModUpdateLevel.FramePreEngine, frameEventArgs);
             _stateManager.FrameUpdate(frameEventArgs);
@@ -442,7 +485,7 @@ namespace Robust.Client
             var uh = logManager.GetSawmill("unhandled");
             AppDomain.CurrentDomain.UnhandledException += (sender, args) =>
             {
-                var message = ((Exception) args.ExceptionObject).ToString();
+                var message = ((Exception)args.ExceptionObject).ToString();
                 uh.Log(args.IsTerminating ? LogLevel.Fatal : LogLevel.Error, message);
             };
 
@@ -485,11 +528,15 @@ namespace Robust.Client
         {
             _modLoader.Shutdown();
 
+            _webViewHook?.Shutdown();
+
             _networkManager.Shutdown("Client shutting down");
             _midiManager.Shutdown();
             IoCManager.Resolve<IEntityLookup>().Shutdown();
             _entityManager.Shutdown();
             _clyde.Shutdown();
         }
+
+        private sealed record ResourceManifestData(string[] Modules);
     }
 }

Robust.Client/GameObjects/ClientEntityManager.cs

@@ -40,7 +40,7 @@ namespace Robust.Client.GameObjects
 
         void IClientEntityManagerInternal.InitializeEntity(IEntity entity)
         {
-            EntityManager.InitializeEntity((Entity)entity);
+            base.InitializeEntity((Entity)entity);
         }
 
         void IClientEntityManagerInternal.StartEntity(IEntity entity)

Robust.Client/GameObjects/Components/Animations/AnimationPlayerComponent.cs

@@ -52,7 +52,9 @@ namespace Robust.Client.GameObjects
         /// </summary>
         internal void AnimationComplete(string key)
         {
+#pragma warning disable 618
             AnimationCompleted?.Invoke(key);
+#pragma warning restore 618
         }
 
         [Obsolete("Use AnimationCompletedEvent instead")]

Robust.Client/GameObjects/Components/Eye/EyeComponent.cs

@@ -27,7 +27,6 @@ namespace Robust.Client.GameObjects
         private bool _setDrawFovOnInitialize = true;
         [DataField("zoom")]
         private Vector2 _setZoomOnInitialize = Vector2.One;
-        private Vector2 _offset = Vector2.Zero;
 
         public IEye? Eye => _eye;
 
@@ -85,14 +84,11 @@ namespace Robust.Client.GameObjects
 
         public override Vector2 Offset
         {
-            get => _offset;
+            get => _eye?.Offset ?? default;
             set
             {
-                if(_offset.EqualsApprox(value))
-                    return;
-
-                _offset = value;
-                UpdateEyePosition();
+                if (_eye != null)
+                    _eye.Offset = value;
             }
         }
 
@@ -171,7 +167,7 @@ namespace Robust.Client.GameObjects
         {
             if (_eye == null) return;
             var mapPos = Owner.Transform.MapPosition;
-            _eye.Position = new MapCoordinates(mapPos.Position + _offset, mapPos.MapId);
+            _eye.Position = new MapCoordinates(mapPos.Position, mapPos.MapId);
         }
     }
 }

Robust.Client/GameObjects/Components/Light/PointLightComponent.cs

@@ -120,6 +120,12 @@ namespace Robust.Client.GameObjects
             set => _visibleNested = value;
         }
 
+        /// <summary>
+        ///     Whether this pointlight should cast shadows
+        /// </summary>
+        [DataField("castShadows")]
+        public bool CastShadows = true;
+
         [DataField("nestedvisible")]
         private bool _visibleNested = true;
         [DataField("autoRot")]

Robust.Client/GameObjects/Components/Renderable/ISpriteComponent.cs

@@ -43,15 +43,6 @@ namespace Robust.Client.GameObjects
         [Animatable]
         Color Color { get; set; }
 
-        /// <summary>
-        ///     Controls whether we use RSI directions to rotate, or just get angular rotation applied.
-        ///     If true, all rotation to this sprite component is negated (that is rotation from say the owner being rotated).
-        ///     Rotation transformations on individual layers still apply.
-        ///     If false, all layers get locked to south and rotation is a transformation.
-        /// </summary>
-        [Obsolete("Use NoRotation and/or DirectionOverride")]
-        bool Directional { get; set; }
-
         /// <summary>
         /// All sprite rotation is locked, and will always be drawn upright on
         /// the screen, regardless of world or view orientation.

Robust.Client/GameObjects/Components/Renderable/SpriteComponent.cs

@@ -47,7 +47,7 @@ namespace Robust.Client.GameObjects
                 if (_visible == value) return;
                 _visible = value;
 
-                Owner.EntityManager.EventBus.RaiseLocalEvent(Owner.Uid, new SpriteUpdateEvent());
+                Owner.EntityManager.EventBus.RaiseLocalEvent(OwnerUid, new SpriteUpdateEvent());
             }
         }
 
@@ -114,23 +114,6 @@ namespace Robust.Client.GameObjects
             set => color = value;
         }
 
-        /// <summary>
-        ///     Controls whether we use RSI directions to rotate, or just get angular rotation applied.
-        ///     If true, all rotation to this sprite component is negated (that is rotation from say the owner being rotated).
-        ///     Rotation transformations on individual layers still apply.
-        ///     If false, all layers get locked to south and rotation is a transformation.
-        /// </summary>
-        [ViewVariables(VVAccess.ReadWrite)]
-        [Obsolete("Use NoRotation and/or DirectionOverride")]
-        public bool Directional
-        {
-            get => _directional;
-            set => _directional = value;
-        }
-
-        [DataField("directional")]
-        private bool _directional = true;
-
         [ViewVariables]
         internal RenderingTreeComponent? RenderTree { get; set; } = null;
 
@@ -319,7 +302,7 @@ namespace Robust.Client.GameObjects
             {
                 if (_containerOccluded == value) return;
                 _containerOccluded = value;
-                Owner.EntityManager.EventBus.RaiseLocalEvent(Owner.Uid, new SpriteUpdateEvent());
+                Owner.EntityManager.EventBus.RaiseLocalEvent(OwnerUid, new SpriteUpdateEvent());
             }
         }
 
@@ -389,6 +372,7 @@ namespace Robust.Client.GameObjects
 
             if (layerDatums.Count != 0)
             {
+                LayerMap.Clear();
                 LayerDatums = layerDatums;
             }
         }
@@ -402,7 +386,6 @@ namespace Robust.Client.GameObjects
         {
             //deep copying things to avoid entanglement
             _baseRsi = other._baseRsi;
-            _directional = other._directional;
             _visible = other._visible;
             _layerMapShared = other._layerMapShared;
             color = other.color;
@@ -564,7 +547,7 @@ namespace Robust.Client.GameObjects
                 Logger.ErrorS(LogCategory, "Unable to load RSI '{0}'. Trace:\n{1}", rsiPath, Environment.StackTrace);
             }
 
-            return AddLayer(stateId, res?.RSI);
+            return AddLayer(stateId, res?.RSI, newIndex);
         }
 
         public int AddLayerState(string stateId, ResourcePath rsiPath, int? newIndex = null)
@@ -1270,6 +1253,12 @@ namespace Robust.Client.GameObjects
 
         private void RenderInternal(DrawingHandleWorld drawingHandle, Angle eyeRotation, Angle worldRotation, Vector2 worldPosition, Direction? overrideDirection)
         {
+            // Reduce the angles to fix math shenanigans
+            worldRotation = worldRotation.Reduced();
+
+            if (worldRotation.Theta < 0)
+                worldRotation = new Angle(worldRotation.Theta + Math.Tau);
+
             var localMatrix = GetLocalMatrix();
 
             foreach (var layer in Layers)
@@ -1280,12 +1269,13 @@ namespace Robust.Client.GameObjects
                 }
 
                 var numDirs = GetLayerDirectionCount(layer);
+                var layerRotation = worldRotation + layer.Rotation;
 
-                CalcModelMatrix(numDirs, eyeRotation, worldRotation, worldPosition, out var modelMatrix);
+                CalcModelMatrix(numDirs, eyeRotation, layerRotation, worldPosition, out var modelMatrix);
                 Matrix3.Multiply(ref localMatrix, ref modelMatrix, out var transformMatrix);
                 drawingHandle.SetTransform(in transformMatrix);
 
-                RenderLayer(drawingHandle, layer, eyeRotation, worldRotation, overrideDirection);
+                RenderLayer(drawingHandle, layer, eyeRotation, layerRotation, overrideDirection);
             }
         }
 
@@ -1321,7 +1311,7 @@ namespace Robust.Client.GameObjects
         public static Angle CalcRectWorldAngle(Angle worldAngle, int numDirections)
         {
             var theta = worldAngle.Theta;
-            var segSize = (MathF.PI * 2) / (numDirections * 2);
+            var segSize = (Math.PI * 2) / (numDirections * 2);
             var segments = (int)(theta / segSize);
             var odd = segments % 2;
             var result = theta - (segments * segSize) - (odd * segSize);
@@ -1663,7 +1653,7 @@ namespace Robust.Client.GameObjects
 
         internal void UpdateBounds()
         {
-            Owner.EntityManager.EventBus.RaiseLocalEvent(Owner.Uid, new SpriteUpdateEvent());
+            Owner.EntityManager.EventBus.RaiseLocalEvent(OwnerUid, new SpriteUpdateEvent());
         }
 
         /// <summary>
@@ -2061,36 +2051,35 @@ namespace Robust.Client.GameObjects
 
         public static IEnumerable<IDirectionalTextureProvider> GetPrototypeTextures(EntityPrototype prototype, IResourceCache resourceCache)
         {
+            return GetPrototypeTextures(prototype, resourceCache, out var _);
+        }
+
+        public static IEnumerable<IDirectionalTextureProvider> GetPrototypeTextures(EntityPrototype prototype, IResourceCache resourceCache, out bool noRot)
+        {
+            var results = new List<IDirectionalTextureProvider>();
+            noRot = false;
             var icon = IconComponent.GetPrototypeIcon(prototype, resourceCache);
             if (icon != null)
             {
-                yield return icon;
-                yield break;
+                results.Add(icon);
+                return results;
             }
 
             if (!prototype.Components.TryGetValue("Sprite", out _))
             {
-                yield return resourceCache.GetFallback<TextureResource>().Texture;
-                yield break;
+                results.Add(resourceCache.GetFallback<TextureResource>().Texture);
+                return results;
             }
 
-            var dummy = new DummyIconEntity { Prototype = prototype };
-            var spriteComponent = dummy.AddComponent<SpriteComponent>();
-
-            if (prototype.Components.TryGetValue("Appearance", out _))
-            {
-                var appearanceComponent = dummy.AddComponent<AppearanceComponent>();
-                foreach (var layer in appearanceComponent.Visualizers)
-                {
-                    layer.InitializeEntity(dummy);
-                    layer.OnChangeData(appearanceComponent);
-                }
-            }
+            var entityManager = IoCManager.Resolve<IEntityManager>();
+            var dummy = entityManager.SpawnEntity(prototype.ID, MapCoordinates.Nullspace).Uid;
+            var spriteComponent = entityManager.EnsureComponent<SpriteComponent>(dummy);
 
             var anyTexture = false;
             foreach (var layer in spriteComponent.AllLayers)
             {
-                if (layer.Texture != null) yield return layer.Texture;
+                if (layer.Texture != null)
+                    results.Add(layer.Texture);
                 if (!layer.RsiState.IsValid || !layer.Visible) continue;
 
                 var rsi = layer.Rsi ?? spriteComponent.BaseRSI;
@@ -2098,14 +2087,17 @@ namespace Robust.Client.GameObjects
                     !rsi.TryGetState(layer.RsiState, out var state))
                     continue;
 
-                yield return state;
+                results.Add(state);
                 anyTexture = true;
             }
 
-            dummy.Delete();
+            noRot = spriteComponent.NoRotation;
+
+            entityManager.DeleteEntity(dummy);
 
             if (!anyTexture)
-                yield return resourceCache.GetFallback<TextureResource>().Texture;
+                results.Add(resourceCache.GetFallback<TextureResource>().Texture);
+            return results;
         }
 
         public static IRsiStateLike GetPrototypeIcon(EntityPrototype prototype, IResourceCache resourceCache)
@@ -2118,144 +2110,14 @@ namespace Robust.Client.GameObjects
                 return GetFallbackState(resourceCache);
             }
 
-            var dummy = new DummyIconEntity { Prototype = prototype };
-            var spriteComponent = dummy.AddComponent<SpriteComponent>();
-            dummy.Delete();
+            var entityManager = IoCManager.Resolve<IEntityManager>();
+            var dummy = entityManager.SpawnEntity(prototype.ID, MapCoordinates.Nullspace).Uid;
+            var spriteComponent = entityManager.EnsureComponent<SpriteComponent>(dummy);
+            var result = spriteComponent.Icon ?? GetFallbackState(resourceCache);
+            entityManager.DeleteEntity(dummy);
 
-            return spriteComponent.Icon ?? GetFallbackState(resourceCache);
+            return result;
         }
-
-        #region DummyIconEntity
-        private class DummyIconEntity : IEntity
-        {
-            public GameTick LastModifiedTick { get; } = GameTick.Zero;
-            public IEntityManager EntityManager { get; } = null!;
-            public string Name { get; set; } = string.Empty;
-            public EntityUid Uid { get; } = EntityUid.Invalid;
-            EntityLifeStage IEntity.LifeStage { get => _lifeStage; set => _lifeStage = value; }
-            public bool Initialized { get; } = false;
-            public bool Initializing { get; } = false;
-            public bool Deleted { get; } = true;
-            public bool Paused { get; set; }
-            public EntityPrototype? Prototype { get; set; }
-
-            public string Description { get; set; } = string.Empty;
-            public bool IsValid()
-            {
-                return false;
-            }
-
-            public ITransformComponent Transform { get; } = null!;
-            public IMetaDataComponent MetaData { get; } = null!;
-
-            private Dictionary<Type, IComponent> _components = new();
-            private EntityLifeStage _lifeStage;
-
-            public T AddComponent<T>() where T : Component, new()
-            {
-                var typeFactory = IoCManager.Resolve<IDynamicTypeFactoryInternal>();
-                var serializationManager = IoCManager.Resolve<ISerializationManager>();
-                var comp = (T)typeFactory.CreateInstanceUnchecked(typeof(T));
-                _components[typeof(T)] = comp;
-                comp.Owner = this;
-
-                if (typeof(ISpriteComponent).IsAssignableFrom(typeof(T)))
-                {
-                    _components[typeof(ISpriteComponent)] = comp;
-                }
-
-                if (Prototype != null && Prototype.TryGetComponent<T>(comp.Name, out var node))
-                {
-                    comp = serializationManager.Copy(node, comp)!;
-                }
-
-                return comp;
-            }
-
-            public void RemoveComponent<T>()
-            {
-                _components.Remove(typeof(T));
-            }
-
-            public bool HasComponent<T>()
-            {
-                return _components.ContainsKey(typeof(T));
-            }
-
-            public bool HasComponent(Type type)
-            {
-                return _components.ContainsKey(type);
-            }
-
-            public T GetComponent<T>()
-            {
-                return (T)_components[typeof(T)];
-            }
-
-            public IComponent GetComponent(Type type)
-            {
-                return null!;
-            }
-
-            public bool TryGetComponent<T>([NotNullWhen(true)] out T? component) where T : class
-            {
-                component = null;
-                if (!_components.TryGetValue(typeof(T), out var value)) return false;
-                component = (T)value;
-                return true;
-            }
-
-            public T? GetComponentOrNull<T>() where T : class
-            {
-                return null;
-            }
-
-            public bool TryGetComponent(Type type, [NotNullWhen(true)] out IComponent? component)
-            {
-                component = null;
-                if (!_components.TryGetValue(type, out var value)) return false;
-                component = value;
-                return true;
-            }
-
-            public IComponent? GetComponentOrNull(Type type)
-            {
-                return null;
-            }
-
-            public void QueueDelete()
-            {
-            }
-
-            public void Delete()
-            {
-            }
-
-            public IEnumerable<IComponent> GetAllComponents()
-            {
-                return Enumerable.Empty<IComponent>();
-            }
-
-            public IEnumerable<T> GetAllComponents<T>()
-            {
-                return Enumerable.Empty<T>();
-            }
-
-            [Obsolete("Component Messages are deprecated, use Entity Events instead.")]
-            public void SendMessage(IComponent? owner, ComponentMessage message)
-            {
-            }
-
-            [Obsolete("Component Messages are deprecated, use Entity Events instead.")]
-            public void SendNetworkMessage(IComponent owner, ComponentMessage message, INetChannel? channel = null)
-            {
-            }
-
-            public void Dirty()
-            {
-            }
-        }
-        #endregion
     }
 
     internal sealed class SpriteUpdateEvent : EntityEventArgs

Robust.Client/GameObjects/EntitySystems/AudioSystem.cs

@@ -12,21 +12,20 @@ using Robust.Shared.Log;
 using Robust.Shared.Map;
 using Robust.Shared.Maths;
 using Robust.Shared.Physics;
-using Robust.Shared.Physics.Broadphase;
 using Robust.Shared.Player;
 using Robust.Shared.Utility;
 
 namespace Robust.Client.GameObjects
 {
     [UsedImplicitly]
-    public class AudioSystem : EntitySystem, IAudioSystem
+    public class AudioSystem : SharedAudioSystem, IAudioSystem
     {
         [Dependency] private readonly IResourceCache _resourceCache = default!;
         [Dependency] private readonly IMapManager _mapManager = default!;
         [Dependency] private readonly IClydeAudio _clyde = default!;
         [Dependency] private readonly IEyeManager _eyeManager = default!;
         [Dependency] private readonly IEntityManager _entityManager = default!;
-        [Dependency] private readonly SharedBroadphaseSystem _broadPhaseSystem = default!;
+        [Dependency] private readonly SharedPhysicsSystem _broadPhaseSystem = default!;
 
         private readonly List<PlayingStream> _playingClydeStreams = new();
 
@@ -65,7 +64,7 @@ namespace Robust.Client.GameObjects
                 return;
             }
 
-            var stream = (PlayingStream?) Play(ev.FileName, ev.Coordinates, ev.AudioParams);
+            var stream = (PlayingStream?) Play(ev.FileName, ev.Coordinates, ev.FallbackCoordinates, ev.AudioParams);
             if (stream != null)
             {
                 stream.NetIdentifier = ev.Identifier;
@@ -84,8 +83,8 @@ namespace Robust.Client.GameObjects
         private void PlayAudioEntityHandler(PlayAudioEntityMessage ev)
         {
             var stream = EntityManager.TryGetEntity(ev.EntityUid, out var entity) ?
-                (PlayingStream?) Play(ev.FileName, entity, ev.AudioParams)
-                : (PlayingStream?) Play(ev.FileName, ev.Coordinates, ev.AudioParams);
+                (PlayingStream?) Play(ev.FileName, entity, ev.FallbackCoordinates, ev.AudioParams)
+                : (PlayingStream?) Play(ev.FileName, ev.Coordinates, ev.FallbackCoordinates, ev.AudioParams);
 
             if (stream != null)
             {
@@ -135,6 +134,10 @@ namespace Robust.Client.GameObjects
                         mapPos = stream.TrackingEntity.Transform.MapPosition;
                     }
 
+                    // TODO Remove when coordinates can't be NaN
+                    if (mapPos == null || !float.IsFinite(mapPos.Value.X) || !float.IsFinite(mapPos.Value.Y))
+                        mapPos = stream.TrackingFallbackCoordinates?.ToMap(_entityManager);
+
                     if (mapPos != null)
                     {
                         var pos = mapPos.Value;
@@ -212,7 +215,6 @@ namespace Robust.Client.GameObjects
                         {
                             stream.Source.SetVelocity(stream.TrackingEntity.GlobalLinearVelocity());
                         }
-
                     }
                 }
             }
@@ -277,12 +279,14 @@ namespace Robust.Client.GameObjects
         /// </summary>
         /// <param name="filename">The resource path to the OGG Vorbis file to play.</param>
         /// <param name="entity">The entity "emitting" the audio.</param>
+        /// <param name="fallbackCoordinates">The map or grid coordinates at which to play the audio when entity is invalid.</param>
         /// <param name="audioParams"></param>
-        private IPlayingAudioStream? Play(string filename, IEntity entity, AudioParams? audioParams = null)
+        private IPlayingAudioStream? Play(string filename, IEntity entity, EntityCoordinates fallbackCoordinates,
+            AudioParams? audioParams = null)
         {
             if (_resourceCache.TryGetResource<AudioResource>(new ResourcePath(filename), out var audio))
             {
-                return Play(audio, entity, audioParams);
+                return Play(audio, entity, fallbackCoordinates, audioParams);
             }
 
             Logger.Error($"Server tried to play audio file {filename} which does not exist.");
@@ -294,15 +298,15 @@ namespace Robust.Client.GameObjects
         /// </summary>
         /// <param name="stream">The audio stream to play.</param>
         /// <param name="entity">The entity "emitting" the audio.</param>
+        /// <param name="fallbackCoordinates">The map or grid coordinates at which to play the audio when entity is invalid.</param>
         /// <param name="audioParams"></param>
-        private IPlayingAudioStream? Play(AudioStream stream, IEntity entity, AudioParams? audioParams = null)
+        private IPlayingAudioStream? Play(AudioStream stream, IEntity entity, EntityCoordinates fallbackCoordinates,
+            AudioParams? audioParams = null)
         {
             var source = _clyde.CreateAudioSource(stream);
             if (!source.SetPosition(entity.Transform.WorldPosition))
             {
-                source.Dispose();
-                Logger.Warning($"Can't play positional audio \"{stream.Name}\", can't set position.");
-                return null;
+                return Play(stream, fallbackCoordinates, fallbackCoordinates, audioParams);
             }
 
             ApplyAudioParams(audioParams, source);
@@ -312,6 +316,7 @@ namespace Robust.Client.GameObjects
             {
                 Source = source,
                 TrackingEntity = entity,
+                TrackingFallbackCoordinates = fallbackCoordinates != EntityCoordinates.Invalid ? fallbackCoordinates : null,
                 Attenuation = audioParams?.Attenuation ?? Attenuation.Default,
                 MaxDistance = audioParams?.MaxDistance ?? float.MaxValue,
                 ReferenceDistance = audioParams?.ReferenceDistance ?? 1f,
@@ -327,12 +332,14 @@ namespace Robust.Client.GameObjects
         /// </summary>
         /// <param name="filename">The resource path to the OGG Vorbis file to play.</param>
         /// <param name="coordinates">The coordinates at which to play the audio.</param>
+        /// <param name="fallbackCoordinates">The map or grid coordinates at which to play the audio when coordinates are invalid.</param>
         /// <param name="audioParams"></param>
-        private IPlayingAudioStream? Play(string filename, EntityCoordinates coordinates, AudioParams? audioParams = null)
+        private IPlayingAudioStream? Play(string filename, EntityCoordinates coordinates, EntityCoordinates fallbackCoordinates,
+            AudioParams? audioParams = null)
         {
             if (_resourceCache.TryGetResource<AudioResource>(new ResourcePath(filename), out var audio))
             {
-                return Play(audio, coordinates, audioParams);
+                return Play(audio, coordinates, fallbackCoordinates, audioParams);
             }
 
             Logger.Error($"Server tried to play audio file {filename} which does not exist.");
@@ -344,18 +351,24 @@ namespace Robust.Client.GameObjects
         /// </summary>
         /// <param name="stream">The audio stream to play.</param>
         /// <param name="coordinates">The coordinates at which to play the audio.</param>
+        /// <param name="fallbackCoordinates">The map or grid coordinates at which to play the audio when coordinates are invalid.</param>
         /// <param name="audioParams"></param>
         private IPlayingAudioStream? Play(AudioStream stream, EntityCoordinates coordinates,
-            AudioParams? audioParams = null)
+            EntityCoordinates fallbackCoordinates, AudioParams? audioParams = null)
         {
             var source = _clyde.CreateAudioSource(stream);
-            if (!source.SetPosition(coordinates.ToMapPos(EntityManager)))
+            if (!source.SetPosition(fallbackCoordinates.Position))
             {
                 source.Dispose();
                 Logger.Warning($"Can't play positional audio \"{stream.Name}\", can't set position.");
                 return null;
             }
 
+            if (!coordinates.IsValid(_entityManager))
+            {
+                coordinates = fallbackCoordinates;
+            }
+
             ApplyAudioParams(audioParams, source);
 
             source.StartPlaying();
@@ -363,6 +376,7 @@ namespace Robust.Client.GameObjects
             {
                 Source = source,
                 TrackingCoordinates = coordinates,
+                TrackingFallbackCoordinates = fallbackCoordinates != EntityCoordinates.Invalid ? fallbackCoordinates : null,
                 Attenuation = audioParams?.Attenuation ?? Attenuation.Default,
                 MaxDistance = audioParams?.MaxDistance ?? float.MaxValue,
                 ReferenceDistance = audioParams?.ReferenceDistance ?? 1f,
@@ -395,6 +409,7 @@ namespace Robust.Client.GameObjects
             public IClydeAudioSource Source = default!;
             public IEntity TrackingEntity = default!;
             public EntityCoordinates? TrackingCoordinates;
+            public EntityCoordinates? TrackingFallbackCoordinates;
             public bool Done;
             public float Volume;
 
@@ -440,19 +455,19 @@ namespace Robust.Client.GameObjects
         /// <inheritdoc />
         public IPlayingAudioStream? Play(Filter playerFilter, string filename, IEntity entity, AudioParams? audioParams = null)
         {
-            return Play(filename, entity, audioParams);
+            return Play(filename, entity, GetFallbackCoordinates(entity.Transform.MapPosition), audioParams);
         }
 
         public IPlayingAudioStream? Play(Filter playerFilter, string filename, EntityUid uid, AudioParams? audioParams = null)
         {
             return EntityManager.TryGetEntity(uid, out var entity)
-                ? Play(filename, entity, audioParams) : null;
+                ? Play(filename, entity, GetFallbackCoordinates(entity.Transform.MapPosition), audioParams) : null;
         }
 
         /// <inheritdoc />
         public IPlayingAudioStream? Play(Filter playerFilter, string filename, EntityCoordinates coordinates, AudioParams? audioParams = null)
         {
-            return Play(filename, coordinates, audioParams);
+            return Play(filename, coordinates, GetFallbackCoordinates(coordinates.ToMap(_entityManager)), audioParams);
         }
     }
 }

Robust.Client/GameObjects/EntitySystems/EyeUpdateSystem.cs

@@ -9,6 +9,7 @@ using Robust.Shared.Input.Binding;
 using Robust.Shared.IoC;
 using Robust.Shared.Map;
 using Robust.Shared.Maths;
+using Robust.Shared.Timing;
 
 #nullable enable
 
@@ -20,14 +21,23 @@ namespace Robust.Client.GameObjects
     [UsedImplicitly]
     internal class EyeUpdateSystem : EntitySystem
     {
-        // How fast the camera rotates in radians
-        private const float CameraRotateSpeed = MathF.PI;
-
         [Dependency] private readonly IEyeManager _eyeManager = default!;
         [Dependency] private readonly IMapManager _mapManager = default!;
         [Dependency] private readonly IPlayerManager _playerManager = default!;
 
-        private bool _isLerping = false;
+        private TransformComponent? _lastParent;
+        private TransformComponent? _lerpTo;
+        private Angle LerpStartRotation;
+        private float _accumulator;
+
+        public bool IsLerping { get => _lerpTo != null; }
+
+        // How fast the camera rotates in radians / s
+        private const float CameraRotateSpeed = MathF.PI;
+        // PER THIS AMOUNT OF TIME MILLISECONDS
+        private const float CameraRotateTimeUnit = 1.2f;
+        // Safety override
+        private const float _lerpTimeMax = CameraRotateTimeUnit + 0.4f;
 
         /// <inheritdoc />
         public override void Initialize()
@@ -59,27 +69,6 @@ namespace Robust.Client.GameObjects
             var currentEye = _eyeManager.CurrentEye;
 
             // TODO: Content should have its own way of handling this. We should have a default behavior that they can overwrite.
-            /*
-            var inputSystem = EntitySystemManager.GetEntitySystem<InputSystem>();
-
-            var direction = 0;
-            if (inputSystem.CmdStates[EngineKeyFunctions.CameraRotateRight] == BoundKeyState.Down)
-            {
-                direction += 1;
-            }
-
-            if (inputSystem.CmdStates[EngineKeyFunctions.CameraRotateLeft] == BoundKeyState.Down)
-            {
-                direction -= 1;
-            }
-
-            // apply camera rotation
-            if(direction != 0)
-            {
-                currentEye.Rotation += CameraRotateSpeed * frameTime * direction;
-                currentEye.Rotation = currentEye.Rotation.Reduced();
-            }
-            */
 
             var playerTransform = _playerManager.LocalPlayer?.ControlledEntity?.Transform;
 
@@ -91,13 +80,55 @@ namespace Robust.Client.GameObjects
                 gridEnt.Transform
                 : _mapManager.GetMapEntity(playerTransform.MapID).Transform;
 
-            if (!_isLerping)
+            // Make sure that we don't fire the vomit carousel when we spawn in
+            if (_lastParent is null)
+                _lastParent = parent;
+
+            // Set a default for target rotation
+            var parentRotation = -parent.WorldRotation;
+            // Reuse current rotation when stepping into space
+            if (parent.GridID == GridId.Invalid)
+                parentRotation = currentEye.Rotation;
+
+            // Handle grid change in general
+            if (_lastParent != parent)
+                _lerpTo = parent;
+
+            // And we are up and running!
+            if (_lerpTo is not null)
             {
-                // TODO: Detect parent change and start lerping
-                var parentRotation = parent.WorldRotation;
-                currentEye.Rotation = -parentRotation;
+                // Handle a case where we have beeing spinning around, but suddenly got off onto a different grid
+                if (parent != _lerpTo) {
+                    LerpStartRotation = currentEye.Rotation;
+                    _lerpTo = parent;
+                    _accumulator = 0f;
+                }
+
+                _accumulator += frameTime;
+
+                var changeNeeded = (float) (LerpStartRotation - parentRotation).Theta;
+
+                var changeLerp = _accumulator / (Math.Abs(changeNeeded % MathF.PI) / CameraRotateSpeed * CameraRotateTimeUnit);
+
+                currentEye.Rotation = Angle.Lerp(LerpStartRotation, parentRotation, changeLerp);
+
+                // Either we have overshot, or we have taken way too long on this, emergency reset time
+                if (changeLerp > 1.0f || _accumulator >= _lerpTimeMax)
+                {
+                    _lastParent = parent;
+                    _lerpTo = null;
+                    _accumulator = 0f;
+                }
             }
 
+            // We are just fine, or we finished a lerp (and probably overshot)
+            if (_lerpTo is null)
+            {
+                currentEye.Rotation = parentRotation;
+                LerpStartRotation = parentRotation;
+            }
+
+
             foreach (var eyeComponent in EntityManager.EntityQuery<EyeComponent>(true))
             {
                 eyeComponent.UpdateEyePosition();

Robust.Client/GameObjects/EntitySystems/RenderingTreeSystem.cs

@@ -109,7 +109,7 @@ namespace Robust.Client.GameObjects
             AnythingMovedSubHandler(args.Sender.Transform);
         }
 
-        private void AnythingMovedSubHandler(ITransformComponent sender)
+        private void AnythingMovedSubHandler(TransformComponent sender)
         {
             // To avoid doing redundant updates (and we don't need to update a grid's children ever)
             if (!_checkedChildren.Add(sender.Owner.Uid) ||
@@ -125,7 +125,7 @@ namespace Robust.Client.GameObjects
             if (sender.Owner.TryGetComponent(out PointLightComponent? light))
                 QueueLightUpdate(light);
 
-            foreach (ITransformComponent child in sender.Children)
+            foreach (TransformComponent child in sender.Children)
             {
                 AnythingMovedSubHandler(child);
             }

Robust.Client/GameObjects/EntitySystems/SpriteSystem.cs

@@ -17,6 +17,7 @@ namespace Robust.Client.GameObjects
         [Dependency] private readonly RenderingTreeSystem _treeSystem = default!;
 
         private readonly Queue<SpriteComponent> _inertUpdateQueue = new();
+        private HashSet<ISpriteComponent> _manualUpdate = new();
 
         public override void Initialize()
         {
@@ -38,6 +39,12 @@ namespace Robust.Client.GameObjects
                 sprite.DoUpdateIsInert();
             }
 
+            foreach (var sprite in _manualUpdate)
+            {
+                if (!sprite.Deleted && !sprite.IsInert)
+                    sprite.FrameUpdate(frameTime);
+            }
+
             var pvsBounds = _eyeManager.GetWorldViewbounds();
 
             var currentMap = _eyeManager.CurrentMap;
@@ -57,10 +64,21 @@ namespace Robust.Client.GameObjects
                         return true;
                     }
 
-                    value.FrameUpdate(state);
+                    if (!_manualUpdate.Contains(value))
+                        value.FrameUpdate(state);
                     return true;
                 }, bounds, true);
             }
+
+            _manualUpdate.Clear();
+        }
+
+        /// <summary>
+        ///     Force update of the sprite component next frame
+        /// </summary>
+        public void ForceUpdate(ISpriteComponent sprite)
+        {
+            _manualUpdate.Add(sprite);
         }
     }
 }

Robust.Client/GameObjects/EntitySystems/UserInterfaceSystem.cs

@@ -29,7 +29,8 @@ namespace Robust.Client.GameObjects
         private void MessageReceived(BoundUIWrapMessage ev)
         {
             var uid = ev.Entity;
-            var cmp = EntityManager.GetComponent<ClientUserInterfaceComponent>(uid);
+            if (!EntityManager.TryGetComponent<ClientUserInterfaceComponent>(uid, out var cmp))
+                return;
 
             var message = ev.Message;
             // This should probably not happen at this point, but better make extra sure!

Robust.Client/GameStates/ClientGameStateManager.cs

@@ -266,10 +266,10 @@ namespace Robust.Client.GameStates
 
             DebugTools.Assert(_timing.InSimulation);
 
-            if (!Predicting) return;
-
-            using(var _ = _timing.StartPastPredictionArea())
+            if (Predicting)
             {
+                using var _ = _timing.StartPastPredictionArea();
+
                 if (_pendingInputs.Count > 0)
                 {
                     Logger.DebugS(CVars.NetPredict.Name,  "CL> Predicted:");
@@ -412,64 +412,57 @@ namespace Robust.Client.GameStates
         private List<EntityUid> ApplyGameState(GameState curState, GameState? nextState)
         {
             _config.TickProcessMessages();
-            _mapManager.ApplyGameStatePre(curState.MapData, curState.EntityStates);
-            var createdEntities = ApplyEntityStates(curState.EntityStates, curState.EntityDeletions,
-                nextState?.EntityStates);
-            _players.ApplyPlayerStates(curState.PlayerStates);
+            _mapManager.ApplyGameStatePre(curState.MapData, curState.EntityStates.Span);
+            var createdEntities = ApplyEntityStates(curState.EntityStates.Span, curState.EntityDeletions.Span,
+                nextState != null ? nextState.EntityStates.Span : default);
+            _players.ApplyPlayerStates(curState.PlayerStates.Value ?? Array.Empty<PlayerState>());
             _mapManager.ApplyGameStatePost(curState.MapData);
 
             GameStateApplied?.Invoke(new GameStateAppliedArgs(curState));
             return createdEntities;
         }
 
-        private List<EntityUid> ApplyEntityStates(EntityState[]? curEntStates, IEnumerable<EntityUid>? deletions,
-            EntityState[]? nextEntStates)
+        private List<EntityUid> ApplyEntityStates(ReadOnlySpan<EntityState> curEntStates, ReadOnlySpan<EntityUid> deletions,
+            ReadOnlySpan<EntityState> nextEntStates)
         {
             var toApply = new Dictionary<IEntity, (EntityState?, EntityState?)>();
             var toInitialize = new List<Entity>();
             var created = new List<EntityUid>();
-            deletions ??= new EntityUid[0];
 
-            if (curEntStates != null && curEntStates.Length != 0)
+            foreach (var es in curEntStates)
             {
-                foreach (var es in curEntStates)
+                //Known entities
+                if (_entities.TryGetEntity(es.Uid, out var entity))
                 {
-                    //Known entities
-                    if (_entities.TryGetEntity(es.Uid, out var entity))
+                    // Logger.Debug($"[{IGameTiming.TickStampStatic}] MOD {es.Uid}");
+                    toApply.Add(entity, (es, null));
+                }
+                else //Unknown entities
+                {
+                    var metaState = (MetaDataComponentState?) es.ComponentChanges.Value?.FirstOrDefault(c => c.NetID == _metaCompNetId).State;
+                    if (metaState == null)
                     {
-                        // Logger.Debug($"[{IGameTiming.TickStampStatic}] MOD {es.Uid}");
-                        toApply.Add(entity, (es, null));
-                    }
-                    else //Unknown entities
-                    {
-                        var metaState = (MetaDataComponentState?) es.ComponentChanges?.FirstOrDefault(c => c.NetID == _metaCompNetId).State;
-                        if (metaState == null)
-                        {
-                            throw new InvalidOperationException($"Server sent new entity state for {es.Uid} without metadata component!");
-                        }
-                        // Logger.Debug($"[{IGameTiming.TickStampStatic}] CREATE {es.Uid} {metaState.PrototypeId}");
-                        var newEntity = (Entity)_entities.CreateEntity(metaState.PrototypeId, es.Uid);
-                        toApply.Add(newEntity, (es, null));
-                        toInitialize.Add(newEntity);
-                        created.Add(newEntity.Uid);
+                        throw new InvalidOperationException($"Server sent new entity state for {es.Uid} without metadata component!");
                     }
+                    // Logger.Debug($"[{IGameTiming.TickStampStatic}] CREATE {es.Uid} {metaState.PrototypeId}");
+                    var newEntity = (Entity)_entities.CreateEntity(metaState.PrototypeId, es.Uid);
+                    toApply.Add(newEntity, (es, null));
+                    toInitialize.Add(newEntity);
+                    created.Add(newEntity.Uid);
                 }
             }
 
-            if (nextEntStates != null && nextEntStates.Length != 0)
+            foreach (var es in nextEntStates)
             {
-                foreach (var es in nextEntStates)
+                if (_entities.TryGetEntity(es.Uid, out var entity))
                 {
-                    if (_entities.TryGetEntity(es.Uid, out var entity))
+                    if (toApply.TryGetValue(entity, out var state))
                     {
-                        if (toApply.TryGetValue(entity, out var state))
-                        {
-                            toApply[entity] = (state.Item1, es);
-                        }
-                        else
-                        {
-                            toApply[entity] = (null, es);
-                        }
+                        toApply[entity] = (state.Item1, es);
+                    }
+                    else
+                    {
+                        toApply[entity] = (null, es);
                     }
                 }
             }
@@ -553,9 +546,9 @@ namespace Robust.Client.GameStates
             var compStateWork = new Dictionary<ushort, (ComponentState? curState, ComponentState? nextState)>();
             var entityUid = entity.Uid;
 
-            if (curState?.ComponentChanges != null)
+            if (curState != null)
             {
-                foreach (var compChange in curState.ComponentChanges)
+                foreach (var compChange in curState.ComponentChanges.Span)
                 {
                     if (compChange.Deleted)
                     {
@@ -578,19 +571,16 @@ namespace Robust.Client.GameStates
                         compStateWork[compChange.NetID] = (compChange.State, null);
                     }
                 }
-            }
 
-            if (curState?.ComponentChanges != null)
-            {
-                foreach (var compChange in curState.ComponentChanges)
+                foreach (var compChange in curState.ComponentChanges.Span)
                 {
                     compStateWork[compChange.NetID] = (compChange.State, null);
                 }
             }
 
-            if (nextState?.ComponentChanges != null)
+            if (nextState != null)
             {
-                foreach (var compState in nextState.ComponentChanges)
+                foreach (var compState in nextState.ComponentChanges.Span)
                 {
                     if (compStateWork.TryGetValue(compState.NetID, out var state))
                     {

Robust.Client/GameStates/GameStateProcessor.cs

@@ -168,38 +168,29 @@ namespace Robust.Client.GameStates
             }
             else
             {
-                if (state.EntityDeletions != null)
+                foreach (var deletion in state.EntityDeletions.Span)
                 {
-                    foreach (var deletion in state.EntityDeletions)
-                    {
-                        _lastStateFullRep.Remove(deletion);
-                    }
+                    _lastStateFullRep.Remove(deletion);
                 }
             }
 
-            if (state.EntityStates != null)
+            foreach (var entityState in state.EntityStates.Span)
             {
-                foreach (var entityState in state.EntityStates)
+                if (!_lastStateFullRep.TryGetValue(entityState.Uid, out var compData))
                 {
-                    if (!_lastStateFullRep.TryGetValue(entityState.Uid, out var compData))
-                    {
-                        compData = new Dictionary<uint, ComponentState>();
-                        _lastStateFullRep.Add(entityState.Uid, compData);
-                    }
+                    compData = new Dictionary<uint, ComponentState>();
+                    _lastStateFullRep.Add(entityState.Uid, compData);
+                }
 
-                    if (entityState.ComponentChanges != null)
+                foreach (var change in entityState.ComponentChanges.Span)
+                {
+                    if (change.Deleted)
                     {
-                        foreach (var change in entityState.ComponentChanges)
-                        {
-                            if (change.Deleted)
-                            {
-                                compData.Remove(change.NetID);
-                            }
-                            else if (change.State is not null)
-                            {
-                                compData[change.NetID] = change.State;
-                            }
-                        }
+                        compData.Remove(change.NetID);
+                    }
+                    else if (change.State is not null)
+                    {
+                        compData[change.NetID] = change.State;
                     }
                 }
             }
@@ -352,7 +343,7 @@ namespace Robust.Client.GameStates
         /// </summary>
         private static GameState ExtrapolateState(GameTick fromSequence, GameTick toSequence, uint lastInput)
         {
-            var state = new GameState(fromSequence, toSequence, lastInput, null, null, null, null);
+            var state = new GameState(fromSequence, toSequence, lastInput, default, default, default, null);
             state.Extrapolated = true;
             return state;
         }

Robust.Client/GameStates/NetEntityOverlay.cs

@@ -65,10 +65,10 @@ namespace Robust.Client.GameStates
 
             var gameState = args.AppliedState;
 
-            if(gameState.EntityStates is not null)
+            if(gameState.EntityStates.HasContents)
             {
                 // Loop over every entity that gets updated this state and record the traffic
-                foreach (var entityState in gameState.EntityStates)
+                foreach (var entityState in gameState.EntityStates.Span)
                 {
                     var newEnt = true;
                     for(var i=0;i<_netEnts.Count;i++)

Robust.Client/GameStates/NetGraphOverlay.cs

@@ -79,17 +79,17 @@ namespace Robust.Client.GameStates
             var conShell = IoCManager.Resolve<IConsoleHost>().LocalShell;
 
             var entStates = args.AppliedState.EntityStates;
-            if (entStates is not null)
+            if (entStates.HasContents)
             {
                 var sb = new StringBuilder();
-                foreach (var entState in entStates)
+                foreach (var entState in entStates.Span)
                 {
                     if (entState.Uid == WatchEntId)
                     {
-                        if(entState.ComponentChanges is not null)
+                        if(entState.ComponentChanges.HasContents)
                         {
                             sb.Append($"\n  Changes:");
-                            foreach (var compChange in entState.ComponentChanges)
+                            foreach (var compChange in entState.ComponentChanges.Span)
                             {
                                 var registration = _componentFactory.GetRegistration(compChange.NetID);
                                 var create = compChange.Created ? 'C' : '\0';
@@ -107,10 +107,10 @@ namespace Robust.Client.GameStates
             }
 
             var entDeletes = args.AppliedState.EntityDeletions;
-            if (entDeletes is not null)
+            if (entDeletes.HasContents)
             {
                 var sb = new StringBuilder();
-                foreach (var entDelete in entDeletes)
+                foreach (var entDelete in entDeletes.Span)
                 {
                     if (entDelete == WatchEntId)
                     {

Robust.Client/Graphics/ClientEye/Eye.cs

@@ -25,6 +25,9 @@ namespace Robust.Client.Graphics
             internal set => _coords = value;
         }
 
+        [ViewVariables(VVAccess.ReadWrite)]
+        public Vector2 Offset { get; set; }
+
         /// <inheritdoc />
         [ViewVariables(VVAccess.ReadWrite)]
         public Angle Rotation
@@ -51,6 +54,15 @@ namespace Robust.Client.Graphics
 
         /// <inheritdoc />
         public void GetViewMatrix(out Matrix3 viewMatrix, Vector2 renderScale)
+        {
+            var scaleMat = Matrix3.CreateScale(_scale.X * renderScale.X, _scale.Y * renderScale.Y);
+            var rotMat = Matrix3.CreateRotation(_rotation);
+            var transMat = Matrix3.CreateTranslation(-_coords.Position - Offset);
+
+            viewMatrix = transMat * rotMat * scaleMat;
+        }
+
+        public void GetViewMatrixNoOffset(out Matrix3 viewMatrix, Vector2 renderScale)
         {
             var scaleMat = Matrix3.CreateScale(_scale.X * renderScale.X, _scale.Y * renderScale.Y);
             var rotMat = Matrix3.CreateRotation(_rotation);

Robust.Client/Graphics/ClientEye/IEye.cs

@@ -21,6 +21,11 @@ namespace Robust.Client.Graphics
         /// </summary>
         MapCoordinates Position { get; }
 
+        /// <summary>
+        /// Translation offset from <see cref="Position"/>. Does not influence the center of FOV.
+        /// </summary>
+        Vector2 Offset { get; set; }
+
         /// <summary>
         /// Rotation of the camera around the Z axis.
         /// </summary>
@@ -51,5 +56,7 @@ namespace Robust.Client.Graphics
         /// <param name="viewMatrixInv">Inverted view matrix for this camera.</param>
         /// <param name="renderScale"></param>
         void GetViewMatrixInv(out Matrix3 viewMatrixInv, Vector2 renderScale);
+
+        void GetViewMatrixNoOffset(out Matrix3 viewMatrix, Vector2 renderScale);
     }
 }

Robust.Client/Graphics/ClientEye/IEyeManager.cs

@@ -54,6 +54,8 @@ namespace Robust.Client.Graphics
         /// <returns>Corresponding point in UI screen space.</returns>
         ScreenCoordinates CoordinatesToScreen(EntityCoordinates point);
 
+        ScreenCoordinates MapToScreen(MapCoordinates point);
+
         /// <summary>
         /// Unprojects a point from UI screen space to world space using the viewport under the screen coordinates.
         /// </summary>

Robust.Client/Graphics/Clyde/Audio/Clyde.Audio.cs

@@ -7,6 +7,7 @@ using System.Runtime.CompilerServices;
 using System.Threading;
 using OpenToolkit.Audio.OpenAL;
 using OpenToolkit.Audio.OpenAL.Extensions.Creative.EFX;
+using OpenToolkit.Mathematics;
 using Robust.Client.Audio;
 using Robust.Shared;
 using Robust.Shared.Audio;
@@ -155,6 +156,14 @@ namespace Robust.Client.Graphics.Clyde
             var eye = _eyeManager.CurrentEye;
             var (x, y) = eye.Position.Position;
             AL.Listener(ALListener3f.Position, x, y, -5);
+            var rot2d = eye.Rotation.ToVec();
+            AL.Listener(ALListenerfv.Orientation, new []{0, 0, -1, rot2d.X, rot2d.Y, 0});
+
+            // Default orientation: at: (0, 0, -1)  up: (0, 1, 0)
+            var (rotX, rotY) = eye.Rotation.ToVec();
+            var at = new Vector3(0f, 0f, -1f);
+            var up = new Vector3(rotY, rotX, 0f);
+            AL.Listener(ALListenerfv.Orientation, ref at, ref up);
 
             // Clear out finalized audio sources.
             while (_sourceDisposeQueue.TryDequeue(out var handles))

Robust.Client/Graphics/Clyde/Clyde.GLFeatures.cs

@@ -19,6 +19,7 @@ namespace Robust.Client.Graphics.Clyde
         private bool _hasGLSamplerObjects;
         private bool _hasGLSrgb;
         private bool _hasGLPrimitiveRestart;
+        private bool _hasGLPrimitiveRestartFixedIndex;
         private bool _hasGLReadFramebuffer;
         private bool _hasGLUniformBuffers;
         private bool HasGLAnyVertexArrayObjects => _hasGLVertexArrayObject || _hasGLVertexArrayObjectOes;
@@ -105,7 +106,7 @@ namespace Robust.Client.Graphics.Clyde
                 CheckGLCap(ref _hasGLPixelBufferObjects, "pixel_buffer_object", (3, 0));
                 CheckGLCap(ref _hasGLStandardDerivatives, "standard_derivatives", (3, 0), "GL_OES_standard_derivatives");
                 CheckGLCap(ref _hasGLReadFramebuffer, "read_framebuffer", (3, 0));
-                CheckGLCap(ref _hasGLPrimitiveRestart, "primitive_restart", (3, 1));
+                CheckGLCap(ref _hasGLPrimitiveRestartFixedIndex, "primitive_restart", (3, 0));
                 CheckGLCap(ref _hasGLUniformBuffers, "uniform_buffers", (3, 0));
                 CheckGLCap(ref _hasGLFloatFramebuffers, "float_framebuffers", (3, 2), "GL_EXT_color_buffer_float");
                 CheckGLCap(ref _hasGLES3Shaders, "gles3_shaders", (3, 0));

Robust.Client/Graphics/Clyde/Clyde.GridRendering.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Buffers;
 using System.Collections.Generic;
+using System.Diagnostics;
 using OpenToolkit.Graphics.OpenGL4;
 using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
@@ -49,10 +50,11 @@ namespace Robust.Client.Graphics.Clyde
                     continue;
                 }
 
-                var transform = _entityManager.GetComponent<ITransformComponent>(grid.GridEntityId);
+                var transform = _entityManager.GetComponent<TransformComponent>(grid.GridEntityId);
                 gridProgram.SetUniform(UniIModelMatrix, transform.WorldMatrix);
+                grid.GetMapChunks(worldBounds, out var enumerator);
 
-                foreach (var chunk in grid.GetMapChunks(worldBounds))
+                while (enumerator.MoveNext(out var chunk))
                 {
                     if (_isChunkDirty(grid, chunk))
                     {
@@ -85,50 +87,39 @@ namespace Robust.Client.Graphics.Clyde
                 datum = _initChunkBuffers(grid, chunk);
             }
 
-            var vertexPool = ArrayPool<Vertex2D>.Shared;
-            var indexPool = ArrayPool<ushort>.Shared;
+            Span<ushort> indexBuffer = stackalloc ushort[_indicesPerChunk(chunk)];
+            Span<Vertex2D> vertexBuffer = stackalloc Vertex2D[_verticesPerChunk(chunk)];
 
-            var vertexBuffer = vertexPool.Rent(_verticesPerChunk(chunk));
-            var indexBuffer = indexPool.Rent(_indicesPerChunk(chunk));
-
-            try
+            var i = 0;
+            foreach (var tile in chunk)
             {
-                var i = 0;
-                foreach (var tile in chunk)
+                var regionMaybe = _tileDefinitionManager.TileAtlasRegion(tile.Tile);
+                if (regionMaybe == null)
                 {
-                    var regionMaybe = _tileDefinitionManager.TileAtlasRegion(tile.Tile);
-                    if (regionMaybe == null)
-                    {
-                        continue;
-                    }
-
-                    var region = regionMaybe.Value;
-
-                    var vIdx = i * 4;
-                    vertexBuffer[vIdx + 0] = new Vertex2D(tile.X, tile.Y, region.Left, region.Bottom);
-                    vertexBuffer[vIdx + 1] = new Vertex2D(tile.X + 1, tile.Y, region.Right, region.Bottom);
-                    vertexBuffer[vIdx + 2] = new Vertex2D(tile.X + 1, tile.Y + 1, region.Right, region.Top);
-                    vertexBuffer[vIdx + 3] = new Vertex2D(tile.X, tile.Y + 1, region.Left, region.Top);
-                    var nIdx = i * GetQuadBatchIndexCount();
-                    var tIdx = (ushort) (i * 4);
-                    QuadBatchIndexWrite(indexBuffer, ref nIdx, tIdx);
-                    i += 1;
+                    continue;
                 }
 
-                GL.BindVertexArray(datum.VAO);
-                CheckGlError();
-                datum.EBO.Use();
-                datum.VBO.Use();
-                datum.EBO.Reallocate(new Span<ushort>(indexBuffer, 0, i * GetQuadBatchIndexCount()));
-                datum.VBO.Reallocate(new Span<Vertex2D>(vertexBuffer, 0, i * 4));
-                datum.Dirty = false;
-                datum.TileCount = i;
-            }
-            finally
-            {
-                vertexPool.Return(vertexBuffer);
-                indexPool.Return(indexBuffer);
+                var region = regionMaybe.Value;
+
+                var vIdx = i * 4;
+                vertexBuffer[vIdx + 0] = new Vertex2D(tile.X, tile.Y, region.Left, region.Bottom);
+                vertexBuffer[vIdx + 1] = new Vertex2D(tile.X + 1, tile.Y, region.Right, region.Bottom);
+                vertexBuffer[vIdx + 2] = new Vertex2D(tile.X + 1, tile.Y + 1, region.Right, region.Top);
+                vertexBuffer[vIdx + 3] = new Vertex2D(tile.X, tile.Y + 1, region.Left, region.Top);
+                var nIdx = i * GetQuadBatchIndexCount();
+                var tIdx = (ushort) (i * 4);
+                QuadBatchIndexWrite(indexBuffer, ref nIdx, tIdx);
+                i += 1;
             }
+
+            GL.BindVertexArray(datum.VAO);
+            CheckGlError();
+            datum.EBO.Use();
+            datum.VBO.Use();
+            datum.EBO.Reallocate(indexBuffer[..(i * GetQuadBatchIndexCount())]);
+            datum.VBO.Reallocate(vertexBuffer[..(i * 4)]);
+            datum.Dirty = false;
+            datum.TileCount = i;
         }
 
         private MapChunkData _initChunkBuffers(IMapGrid grid, IMapChunk chunk)

Robust.Client/Graphics/Clyde/Clyde.HLR.cs

@@ -98,7 +98,7 @@ namespace Robust.Client.Graphics.Clyde
             SwapAllBuffers();
         }
 
-        private void RenderOverlays(Viewport vp, OverlaySpace space, in Box2 worldBox)
+        private void RenderOverlays(Viewport vp, OverlaySpace space, in Box2 worldBox, in Box2Rotated worldBounds)
         {
             using (DebugGroup($"Overlays: {space}"))
             {
@@ -116,8 +116,10 @@ namespace Robust.Client.Graphics.Clyde
                         ClearFramebuffer(default);
                     }
 
-                    overlay.ClydeRender(_renderHandle, space, null, vp, new UIBox2i((0, 0), vp.Size), worldBox);
+                    overlay.ClydeRender(_renderHandle, space, null, vp, new UIBox2i((0, 0), vp.Size), worldBox, worldBounds);
                 }
+
+                FlushRenderQueue();
             }
         }
 
@@ -130,8 +132,9 @@ namespace Robust.Client.Graphics.Clyde
         {
             var list = GetOverlaysForSpace(space);
 
-            var worldBounds = CalcWorldAABB(vp);
-            var args = new OverlayDrawArgs(space, vpControl, vp, handle, bounds, worldBounds);
+            var worldAABB = CalcWorldAABB(vp);
+            var worldBounds = CalcWorldBounds(vp);
+            var args = new OverlayDrawArgs(space, vpControl, vp, handle, bounds, worldAABB, worldBounds);
 
             foreach (var overlay in list)
             {
@@ -209,11 +212,12 @@ namespace Robust.Client.Graphics.Clyde
                 return;
             }
 
-            RenderOverlays(viewport, OverlaySpace.WorldSpaceBelowEntities, worldAABB);
+            RenderOverlays(viewport, OverlaySpace.WorldSpaceBelowEntities, worldAABB, worldBounds);
 
             var screenSize = viewport.Size;
+            eye.GetViewMatrix(out var eyeMatrix, eye.Scale);
 
-            ProcessSpriteEntities(mapId, worldBounds, _drawingSpriteList);
+            ProcessSpriteEntities(mapId, eyeMatrix, worldBounds, _drawingSpriteList);
 
             var worldOverlays = new List<Overlay>();
 
@@ -261,7 +265,8 @@ namespace Robust.Client.Graphics.Clyde
                             null,
                             viewport,
                             new UIBox2i((0, 0), viewport.Size),
-                            worldAABB);
+                            worldAABB,
+                            worldBounds);
                         overlayIndex = j;
                         continue;
                     }
@@ -362,7 +367,7 @@ namespace Robust.Client.Graphics.Clyde
         }
 
         [MethodImpl(MethodImplOptions.NoInlining)]
-        private void ProcessSpriteEntities(MapId map, Box2Rotated worldBounds,
+        private void ProcessSpriteEntities(MapId map, Matrix3 eyeMatrix, Box2Rotated worldBounds,
             RefList<(SpriteComponent sprite, Matrix3 matrix, Angle worldRot, float yWorldPos)> list)
         {
             foreach (var comp in _entitySystemManager.GetEntitySystem<RenderingTreeSystem>().GetRenderTrees(map, worldBounds))
@@ -380,10 +385,10 @@ namespace Robust.Client.Graphics.Clyde
                     entry.sprite = value;
                     entry.worldRot = transform.WorldRotation;
                     entry.matrix = transform.WorldMatrix;
-                    var worldPos = new Vector2(entry.matrix.R0C2, entry.matrix.R1C2);
+                    var eyePos = eyeMatrix.Transform(new Vector2(entry.matrix.R0C2, entry.matrix.R1C2));
                     // Didn't use the bounds from the query as that has to be re-calculated (and is probably more expensive than this).
-                    var bounds = value.CalculateBoundingBox(worldPos);
-                    entry.yWorldPos = worldPos.Y - bounds.Extents.Y;
+                    var bounds = value.CalculateBoundingBox(eyePos);
+                    entry.yWorldPos = eyePos.Y - bounds.Extents.Y;
                     return true;
 
                 }, bounds, true);
@@ -468,8 +473,7 @@ namespace Robust.Client.Graphics.Clyde
                         DrawLightsAndFov(viewport, worldBounds, worldAABB, eye);
                     }
 
-                    RenderOverlays(viewport, OverlaySpace.WorldSpaceBelowWorld, worldAABB);
-                    FlushRenderQueue();
+                    RenderOverlays(viewport, OverlaySpace.WorldSpaceBelowWorld, worldAABB, worldBounds);
 
                     using (DebugGroup("Grids"))
                     {
@@ -482,8 +486,7 @@ namespace Robust.Client.Graphics.Clyde
                         DrawEntities(viewport, worldBounds, worldAABB, eye);
                     }
 
-                    RenderOverlays(viewport, OverlaySpace.WorldSpaceBelowFOV, worldAABB);
-                    FlushRenderQueue();
+                    RenderOverlays(viewport, OverlaySpace.WorldSpaceBelowFOV, worldAABB, worldBounds);
 
                     if (_lightManager.Enabled && _lightManager.DrawHardFov && eye.DrawFov)
                     {
@@ -516,8 +519,7 @@ namespace Robust.Client.Graphics.Clyde
                         UIBox2.FromDimensions(Vector2.Zero, viewport.Size), new Color(1, 1, 1, 0.5f));
                 }
 
-                RenderOverlays(viewport, OverlaySpace.WorldSpace, worldAABB);
-                FlushRenderQueue();
+                RenderOverlays(viewport, OverlaySpace.WorldSpace, worldAABB, worldBounds);
 
                 _currentViewport = oldVp;
             });
@@ -529,12 +531,13 @@ namespace Robust.Client.Graphics.Clyde
             if (eye == null)
                 return default;
 
-            return GetAABB(eye, viewport);
+            // Will be larger than the actual viewport due to rotation.
+            return CalcWorldBounds(viewport).CalcBoundingBox();
         }
 
         private static Box2 GetAABB(IEye eye, Viewport viewport)
         {
-            return Box2.CenteredAround(eye.Position.Position,
+            return Box2.CenteredAround(eye.Position.Position + eye.Offset,
                 viewport.Size / viewport.RenderScale / EyeManager.PixelsPerMeter * eye.Zoom);
         }
 

Robust.Client/Graphics/Clyde/Clyde.LightRendering.cs

@@ -335,7 +335,7 @@ namespace Robust.Client.Graphics.Clyde
             }
 
             var (lights, count, expandedBounds) = GetLightsToRender(mapId, worldBounds, worldAABB);
-            eye.GetViewMatrix(out var eyeTransform, eye.Scale);
+            eye.GetViewMatrixNoOffset(out var eyeTransform, eye.Scale);
 
             UpdateOcclusionGeometry(mapId, expandedBounds, eyeTransform);
 
@@ -361,6 +361,8 @@ namespace Robust.Client.Graphics.Clyde
                     {
                         var (light, lightPos, _) = lights[i];
 
+                        if (!light.CastShadows) continue;
+
                         DrawOcclusionDepth(lightPos, ShadowMapSize, light.Radius, i);
                     }
                 }
@@ -459,7 +461,7 @@ namespace Robust.Client.Graphics.Clyde
                 }
 
                 lightShader.SetUniformMaybe("lightCenter", lightPos);
-                lightShader.SetUniformMaybe("lightIndex", (i + 0.5f) / ShadowTexture.Height);
+                lightShader.SetUniformMaybe("lightIndex", component.CastShadows ? (i + 0.5f) / ShadowTexture.Height : -1);
 
                 var offset = new Vector2(component.Radius, component.Radius);
 
@@ -749,9 +751,8 @@ namespace Robust.Client.Graphics.Clyde
             SetTexture(TextureUnit.Texture0, FovTexture);
 
             fovShader.SetUniformTextureMaybe(UniIMainTexture, TextureUnit.Texture0);
-            fovShader.SetUniformMaybe("center", eye.Position.Position);
 
-            DrawBlit(viewport, fovShader);
+            FovSetTransformAndBlit(viewport, eye.Position.Position, fovShader);
 
             GL.StencilMask(0x00);
             GL.Disable(EnableCap.StencilTest);
@@ -786,7 +787,6 @@ namespace Robust.Client.Graphics.Clyde
             }
 
             fovShader.SetUniformTextureMaybe(UniIMainTexture, TextureUnit.Texture0);
-            fovShader.SetUniformMaybe("center", eye.Position.Position);
 
             GL.StencilMask(0xFF);
             CheckGlError();
@@ -795,7 +795,7 @@ namespace Robust.Client.Graphics.Clyde
             GL.StencilOp(TKStencilOp.Keep, TKStencilOp.Keep, TKStencilOp.Replace);
             CheckGlError();
 
-            DrawBlit(viewport, fovShader);
+            FovSetTransformAndBlit(viewport, eye.Position.Position, fovShader);
 
             if (_hasGLSamplerObjects)
             {
@@ -811,12 +811,30 @@ namespace Robust.Client.Graphics.Clyde
             }
         }
 
-        private void DrawBlit(Viewport vp, GLShaderProgram shader)
+        private void FovSetTransformAndBlit(Viewport vp, Vector2 fovCentre, GLShaderProgram fovShader)
         {
-            var a = ScreenToMap((-1, -1), vp);
-            var b = ScreenToMap(vp.Size + Vector2i.One, vp);
+            // It might be an idea if there was a proper way to get the LocalToWorld matrix.
+            // But actually constructing the matrix tends to be more trouble than it's worth in most cases.
+            // (Maybe if there was some way to observe Eye matrix changes that wouldn't be the case, as viewport could dynamically update.)
+            // This is expected to run a grand total of twice per frame for 6 LocalToWorld calls.
+            // Something else to note is that modifications must be made anyway.
 
-            _drawQuad(a, b, Matrix3.Identity, shader);
+            // Something ELSE to note is that it's absolutely critical that this be calculated in the "right way" due to precision issues!
+
+            // Bit of an interesting little trick here - need to set things up correctly.
+            // 0, 0 in clip-space is the centre of the screen, and 1, 1 is the top-right corner.
+            var halfSize = vp.Size / 2.0f;
+            var uZero = vp.LocalToWorld(halfSize).Position;
+            var uX = vp.LocalToWorld(halfSize + (Vector2.UnitX * halfSize.X)).Position - uZero;
+            var uY = vp.LocalToWorld(halfSize - (Vector2.UnitY * halfSize.Y)).Position - uZero;
+
+            // Second modification is that output must be fov-centred (difference-space)
+            uZero -= fovCentre;
+
+            var clipToDiff = new Matrix3(ref uX, ref uY, ref uZero);
+
+            fovShader.SetUniformMaybe("clipToDiff", clipToDiff);
+            _drawQuad(Vector2.Zero, Vector2.One, Matrix3.Identity, fovShader);
         }
 
         private void UpdateOcclusionGeometry(MapId map, Box2 expandedBounds, Matrix3 eyeTransform)

Robust.Client/Graphics/Clyde/Clyde.RenderTargets.cs

@@ -273,7 +273,11 @@ namespace Robust.Client.Graphics.Clyde
             public Vector2i Size;
             public bool IsSrgb;
 
+#pragma warning disable 649
+            // Gets assigned by (currently commented out) GLContextAngle.
+            // It's fine don't worry about it.
             public bool FlipY;
+#pragma warning restore 649
 
             public RTCF ColorFormat;
 

Robust.Client/Graphics/Clyde/Clyde.Windowing.cs

@@ -28,7 +28,10 @@ namespace Robust.Client.Graphics.Clyde
         private WindowReg? _mainWindow;
 
         private IWindowingImpl? _windowing;
+#pragma warning disable 414
+        // Keeping this for if/when we ever get a new renderer.
         private Renderer _chosenRenderer;
+#pragma warning restore 414
 
         private ResourcePath? _windowIconPath;
         private Thread? _windowingThread;

Robust.Client/Graphics/Clyde/Clyde.cs

@@ -206,6 +206,11 @@ namespace Robust.Client.Graphics.Clyde
                 GL.PrimitiveRestartIndex(PrimitiveRestartIndex);
                 CheckGlError();
             }
+            if (_hasGLPrimitiveRestartFixedIndex)
+            {
+                GL.Enable(EnableCap.PrimitiveRestartFixedIndex);
+                CheckGlError();
+            }
             if (!HasGLAnyVertexArrayObjects)
             {
                 _sawmillOgl.Warning("NO VERTEX ARRAY OBJECTS! Things will probably go terribly, terribly wrong (no fallback path yet)");

Robust.Client/Graphics/Clyde/Windowing/Glfw.Windows.cs

@@ -136,7 +136,7 @@ namespace Robust.Client.Graphics.Clyde
                 if (_clyde._windowMode == WindowMode.Fullscreen)
                 {
                     win.PrevWindowSize = win.WindowSize;
-                    win.PrevWindowPos = win.PrevWindowPos;
+                    win.PrevWindowPos = win.WindowPos;
 
                     SendCmd(new CmdWinSetFullscreen((nint) win.GlfwWindow));
                 }
@@ -262,7 +262,10 @@ namespace Robust.Client.Graphics.Clyde
                 var (reg, errorResult) = task.Result;
 
                 if (reg != null)
+                {
+                    reg.Owner = reg.Handle;
                     return (reg, null);
+                }
 
                 var (desc, errCode) = errorResult!.Value;
                 return (null, $"[{errCode}]: {desc}");

Robust.Client/Graphics/Font.cs

@@ -1,4 +1,5 @@
-using System.Text;
+using System;
+using System.Text;
 using Robust.Client.ResourceManagement;
 using Robust.Shared.IoC;
 using Robust.Shared.Maths;
@@ -143,6 +144,61 @@ namespace Robust.Client.Graphics
         }
     }
 
+    public sealed class StackedFont : Font
+    {
+        // _main is the "default" font; the top of the Stack.
+        public readonly Font _main;
+        public readonly Font[] Stack;
+
+        public StackedFont(params Font[] args)
+        {
+            if (args.Length < 1)
+                throw new ArgumentException("At least one font is required");
+
+            Stack = args;
+            _main = args[0];
+        }
+
+        // All metrics methods use the default font (_main).
+        // Technically these could vary between stacked fonts, but that is a case
+        // that really should already be avoided for so many other reasons.
+        public override int GetAscent(float scale) => _main.GetAscent(scale);
+        public override int GetHeight(float scale) => _main.GetHeight(scale);
+        public override int GetDescent(float scale) => _main.GetDescent(scale);
+        public override int GetLineHeight(float scale) => _main.GetLineHeight(scale);
+
+        // DrawChar just proxies to the stack, or invokes _main's fallback.
+        public override float DrawChar(DrawingHandleScreen handle, Rune rune, Vector2 baseline, float scale, Color color, bool fallback=true)
+        {
+            foreach (var f in Stack)
+            {
+                var w = f.DrawChar(handle, rune, baseline, scale, color, fallback: false);
+                if (w != 0f)
+                    return w;
+            }
+
+            if (fallback)
+                return _main.DrawChar(handle, rune, baseline, scale, color, fallback: true);
+
+            return 0f;
+        }
+
+        public override CharMetrics? GetCharMetrics(Rune rune, float scale, bool fallback=true)
+        {
+            foreach (var f in Stack)
+            {
+                var m = f.GetCharMetrics(rune, scale, fallback: false);
+                if (m != null)
+                    return m;
+            }
+
+            if (!Rune.IsWhiteSpace(rune) && fallback)
+                return _main.GetCharMetrics(rune, scale, fallback: true);
+
+            return null;
+        }
+    }
+
     public sealed class DummyFont : Font
     {
         public override int GetAscent(float scale) => default;

Robust.Client/Graphics/Overlays/Overlay.cs

@@ -84,7 +84,8 @@ namespace Robust.Client.Graphics
             IViewportControl? vpControl,
             IClydeViewport vp,
             in UIBox2i screenBox,
-            in Box2 worldBox)
+            in Box2 worldBox,
+            in Box2Rotated worldBounds)
         {
             DrawingHandleBase handle;
             if (currentSpace == OverlaySpace.ScreenSpace || currentSpace == OverlaySpace.ScreenSpaceBelowWorld)
@@ -97,7 +98,7 @@ namespace Robust.Client.Graphics
                 handle = renderHandle.DrawingHandleWorld;
             }
 
-            var args = new OverlayDrawArgs(currentSpace, vpControl, vp, handle, screenBox, worldBox);
+            var args = new OverlayDrawArgs(currentSpace, vpControl, vp, handle, screenBox, worldBox, worldBounds);
 
             Draw(args);
         }

Robust.Client/Graphics/Overlays/OverlayDrawArgs.cs

@@ -41,7 +41,12 @@ namespace Robust.Client.Graphics
         /// <summary>
         ///     AABB enclosing the area visible in the viewport.
         /// </summary>
-        public readonly Box2 WorldBounds;
+        public readonly Box2 WorldAABB;
+
+        /// <summary>
+        ///     <see cref="Box2Rotated"/> of the area visible in the viewport.
+        /// </summary>
+        public readonly Box2Rotated WorldBounds;
 
         public DrawingHandleScreen ScreenHandle => (DrawingHandleScreen) DrawingHandle;
         public DrawingHandleWorld WorldHandle => (DrawingHandleWorld) DrawingHandle;
@@ -52,13 +57,15 @@ namespace Robust.Client.Graphics
             IClydeViewport viewport,
             DrawingHandleBase drawingHandle,
             in UIBox2i viewportBounds,
-            in Box2 worldBounds)
+            in Box2 worldAabb,
+            in Box2Rotated worldBounds)
         {
             Space = space;
             ViewportControl = viewportControl;
             Viewport = viewport;
             DrawingHandle = drawingHandle;
             ViewportBounds = viewportBounds;
+            WorldAABB = worldAabb;
             WorldBounds = worldBounds;
         }
     }

Robust.Client/Graphics/RSI/RSI.State.cs

@@ -24,13 +24,14 @@ namespace Robust.Client.Graphics
             // 2D array for the texture to use for each animation frame at each direction.
             public readonly Texture[][] Icons;
 
-            internal State(Vector2i size, StateId stateId, DirectionType direction, float[] delays, Texture[][] icons)
+            internal State(Vector2i size, RSI rsi, StateId stateId, DirectionType direction, float[] delays, Texture[][] icons)
             {
                 DebugTools.Assert(size.X > 0);
                 DebugTools.Assert(size.Y > 0);
                 DebugTools.Assert(stateId.IsValid);
 
                 Size = size;
+                RSI = rsi;
                 StateId = stateId;
                 Directions = direction;
                 Delays = delays;
@@ -47,6 +48,11 @@ namespace Robust.Client.Graphics
             /// </summary>
             public Vector2i Size { get; }
 
+            /// <summary>
+            ///     The source RSI of this state.
+            /// </summary>
+            public RSI RSI { get; }
+
             /// <summary>
             ///     The identifier for this state inside an RSI.
             /// </summary>

Robust.Client/Input/EngineContexts.cs

@@ -60,6 +60,7 @@ namespace Robust.Client.Input
             common.AddFunction(EngineKeyFunctions.TextReleaseFocus);
             common.AddFunction(EngineKeyFunctions.TextScrollToBottom);
             common.AddFunction(EngineKeyFunctions.TextDelete);
+            common.AddFunction(EngineKeyFunctions.TextTabComplete);
 
             var editor = contexts.New("editor", common);
             editor.AddFunction(EngineKeyFunctions.EditorLinePlace);

Robust.Client/Map/ClientMapManager.cs

@@ -11,7 +11,7 @@ namespace Robust.Client.Map
 {
     internal class ClientMapManager : MapManager, IClientMapManager
     {
-        public void ApplyGameStatePre(GameStateMapData? data, EntityState[]? entityStates)
+        public void ApplyGameStatePre(GameStateMapData? data, ReadOnlySpan<EntityState> entityStates)
         {
             // There was no map data this tick, so nothing to do.
             if(data == null)
@@ -20,7 +20,7 @@ namespace Robust.Client.Map
             // First we need to figure out all the NEW MAPS.
             if(data.CreatedMaps != null)
             {
-                DebugTools.Assert(entityStates is not null, "Received new maps, but no entity state.");
+                DebugTools.Assert(!entityStates.IsEmpty, "Received new maps, but no entity state.");
 
                 foreach (var mapId in data.CreatedMaps)
                 {
@@ -33,10 +33,7 @@ namespace Robust.Client.Map
                     //get shared euid of map comp entity
                     foreach (var entityState in entityStates!)
                     {
-                        if(entityState.ComponentChanges is null)
-                            continue;
-
-                        foreach (var compChange in entityState.ComponentChanges)
+                        foreach (var compChange in entityState.ComponentChanges.Span)
                         {
                             if (compChange.State is not MapComponentState mapCompState || mapCompState.MapId != mapId)
                                 continue;
@@ -68,10 +65,7 @@ namespace Robust.Client.Map
                     //get shared euid of map comp entity
                     foreach (var entityState in entityStates!)
                     {
-                        if (entityState.ComponentChanges is null)
-                            continue;
-
-                        foreach (var compState in entityState.ComponentChanges)
+                        foreach (var compState in entityState.ComponentChanges.Span)
                         {
                             if (compState.State is not MapGridComponentState gridCompState || gridCompState.GridIndex != gridId)
                                 continue;

Robust.Client/Map/IClientMapManager.cs

@@ -1,3 +1,4 @@
+using System;
 using Robust.Shared.GameObjects;
 using Robust.Shared.GameStates;
 using Robust.Shared.Map;
@@ -8,7 +9,7 @@ namespace Robust.Client.Map
     {
         // Two methods here, so that new grids etc can be made BEFORE entities get states applied,
         // but old ones can be deleted after.
-        void ApplyGameStatePre(GameStateMapData? data, EntityState[]? entityStates);
+        void ApplyGameStatePre(GameStateMapData? data, ReadOnlySpan<EntityState> entityStates);
         void ApplyGameStatePost(GameStateMapData? data);
     }
 }

Robust.Client/Physics/JointSystem.cs

@@ -0,0 +1,68 @@
+using System.Collections.Generic;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameStates;
+using Robust.Shared.Physics;
+using Robust.Shared.Physics.Dynamics.Joints;
+
+namespace Robust.Client.Physics
+{
+    public sealed class JointSystem : SharedJointSystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+            SubscribeLocalEvent<JointComponent, ComponentHandleState>(HandleComponentState);
+        }
+
+        private void HandleComponentState(EntityUid uid, JointComponent component, ref ComponentHandleState args)
+        {
+            if (args.Current is not JointComponent.JointComponentState jointState) return;
+
+            var changed = new List<string>();
+
+            foreach (var (existing, _) in component.Joints)
+            {
+                if (!jointState.Joints.ContainsKey(existing))
+                {
+                    changed.Add(existing);
+                }
+            }
+
+            foreach (var removed in changed)
+            {
+                RemoveJoint(component.Joints[removed]);
+            }
+
+            foreach (var (id, state) in jointState.Joints)
+            {
+                Joint joint;
+
+                if (!component.Joints.ContainsKey(id))
+                {
+                    // Add new joint (if possible).
+                    // Need to wait for BOTH joint components to come in first before we can add it. Yay dependencies!
+                    if (!EntityManager.HasComponent<JointComponent>(state.UidA) ||
+                        !EntityManager.HasComponent<JointComponent>(state.UidB)) continue;
+
+                    joint = state.GetJoint();
+                    AddJoint(joint);
+                    continue;
+                }
+
+                joint = state.GetJoint();
+                var existing = component.Joints[id];
+
+                if (!existing.Equals(joint))
+                {
+                    existing.ApplyState(state);
+                    component.Dirty();
+                }
+            }
+
+            if (changed.Count > 0)
+            {
+                component.Dirty();
+            }
+        }
+    }
+}