Added file identification header

-All files now start with a 16 byte header consisting of "PROG" followed
by the integer position of the region in region coordinates.
	-regionCoords is passed through some functions to allow for this to be
confirmed.

.gitignore

@@ -30,6 +30,8 @@ build_packages/*
 !build_packages/NSIS
 build_packages/NSIS/*
 !build_packages/NSIS/ProgressiaInstaller.nsi
+!build_packages/NSIS/logo.ico
+!build_packages/NSIS/left_side.bmp
 
 # ... and except build_packages/DEB/template
 !build_packages/DEB

README.md

@@ -16,7 +16,7 @@ temperature mechanics and a parallelism-capable server.
 - GNU/Linux (x64, arm32 or arm64), Windows XP or later (x64 or x86) or MacOS (x64)
 - Java 8 or later
 - OpenGL 2.1 or later
-- Probably at least 4 GiB RAM
+- Probably about 0.5 GiB RAM
 - Less than 1 GiB of storage space
 
 See [Build Guide](docs/building/BuildGuide.md) for compilation requirements.

buildPackages.sh

@@ -3,17 +3,17 @@
 #
 # Progressia
 # Copyright (C)  2020-2021  Wind Corporation and contributors
-# 
+#
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
-# 
+#
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
-# 
+#
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #
@@ -24,24 +24,24 @@ buildDebianPackage() {
 
     # Commands that must be available to execute this action
     requiredCommands='dpkg-deb fakeroot'
-    
+
     # Package name. Sync with control file manually!
     name='progressia-techdemo'
     # Version that the package will receive. Sync with control file manually!
     version='1.0_all'
-    
+
     # This directory will be copied into $tmpDir
     templateDirectory="build_packages/DEB/template"
-    
+
     # Files that must be present
     requiredFiles="$templateDirectory/DEBIAN/control"
-    
+
     nameAndVersion="$name-$version"
     tmpDir="build_packages/DEB/$nameAndVersion"
     outputFile="build_packages/DEB/$nameAndVersion.deb"
 
     echo "Checking environment to build Debian package"
-    
+
     for item in $requiredCommands; do
         if command -v "$item" &> /dev/null; then
             echo "- $item found"
@@ -50,7 +50,7 @@ buildDebianPackage() {
             exit 100
         fi
     done
-    
+
     for file in $requiredFiles; do
         if ! [ -r "$file" ]; then
             echoerr "$file is missing or not readable, cannot package"
@@ -59,13 +59,13 @@ buildDebianPackage() {
             echo "- $file is present and readable"
         fi
     done
-    
+
     echo "Environment OK; packaging Debian package"
     exitCode=0
-    
+
     {
         shareDir="$tmpDir/usr/share/progressia"
-        
+
         mkdir -p "$tmpDir"                                           &&
         mkdir -p "$shareDir"                                         &&
         cp -r "$templateDirectory"/*      "$tmpDir"                  &&
@@ -79,7 +79,7 @@ buildDebianPackage() {
         echoerr "Could not create Debian package"
         exitCode=1
     }
-    
+
     {
         if [ -d "$tmpDir" ]; then
             rm -r "$tmpDir"
@@ -89,7 +89,7 @@ buildDebianPackage() {
         echoerr "Could not clean up after packaging Debian package"
         exitCode=2
     }
-    
+
     exit "$exitCode"
 }
 
@@ -97,15 +97,15 @@ buildWindowsInstaller() {
 
     # Commands that must be available to execute this action
     requiredCommands='makensis'
-    
+
     # NSIS configuration file that must be present
     configurationFile='build_packages/NSIS/ProgressiaInstaller.nsi'
-    
+
     # File that will be output
     outputFile='build_packages/NSIS/ProgressiaInstaller.exe'
 
     echo "Checking environment to build Windows installer"
-    
+
     for item in $requiredCommands; do
         if command -v "$item" &> /dev/null; then
             echo "- $item found"
@@ -114,20 +114,21 @@ buildWindowsInstaller() {
             exit 100
         fi
     done
-    
+
     if ! [ -r "$configurationFile" ]; then
         echoerr "$configurationFile is missing or not readable, cannot build"
         exit 101
     else
         echo "- $configurationFile is present and readable"
     fi
-    
+
     echo "Environment OK; building Windows installer"
     exitCode=0
-    
+
     {
         cp -r 'build/libs/lib'            'build_packages/NSIS/lib'            &&
         cp    'build/libs/Progressia.jar' 'build_packages/NSIS/Progressia.jar' &&
+        cp    'LICENSE'                   'build_packages/NSIS/LICENSE.txt'    &&
         echo "------ NSIS ------"                                              &&
         makensis "$configurationFile"                                          &&
         echo "---- NSIS END ----"                                              &&
@@ -136,7 +137,7 @@ buildWindowsInstaller() {
         echoerr "Could not build Windows installer"
         exitCode=1
     }
-    
+
     {
         if [ -d 'build_packages/NSIS/lib' ]; then
             rm -r 'build_packages/NSIS/lib'
@@ -144,12 +145,15 @@ buildWindowsInstaller() {
         if [ -e 'build_packages/NSIS/Progressia.jar' ]; then
             rm 'build_packages/NSIS/Progressia.jar'
         fi
+        if [ -e 'build_packages/NSIS/LICENSE.txt' ]; then
+            rm 'build_packages/NSIS/LICENSE.txt'
+        fi
         echo "Cleaned up"
     } || {
         echoerr "Could not clean up after building Windows installer"
         exitCode=2
     }
-    
+
     exit "$exitCode"
 }
 

build_packages/NSIS/ProgressiaInstaller.nsi

@@ -10,16 +10,32 @@
 ;--------------------------------
 ;General
 
+  !define PROJECT_NAME "Progressia"
+
+  ; MUI Settings / Icons
+  !define MUI_ICON "logo.ico"
+  ;!define MUI_UNICON ;Uninstall icon
+
+  ; MUI Settings / Header
+  ; !define MUI_HEADERIMAGE
+  ; !define MUI_HEADERIMAGE_RIGHT
+  ; !define MUI_HEADERIMAGE_BITMAP "${NSISDIR}\Contrib\Graphics\Header\orange-r-nsis.bmp"
+  ; !define MUI_HEADERIMAGE_UNBITMAP "${NSISDIR}\Contrib\Graphics\Header\orange-uninstall-r-nsis.bmp"
+
+  ; MUI Settings / Wizard
+  !define MUI_WELCOMEFINISHPAGE_BITMAP "left_side.bmp"
+  !define MUI_UNWELCOMEFINISHPAGE_BITMAP "left_side.bmp"
+
   ;Name and file
-  Name "Progressia"
+  Name "${PROJECT_NAME}"
-  OutFile "ProgressiaInstaller.exe"
+  OutFile "${PROJECT_NAME}Installer.exe"
   Unicode True
 
   ;Default installation folder
-  InstallDir "$PROGRAMFILES\Progressia"
+  InstallDir "$PROGRAMFILES\${PROJECT_NAME}"
 
   ;Get installation folder from registry if available
-  InstallDirRegKey HKLM "Software\Progressia" "Install_Dir"
+  InstallDirRegKey HKLM "Software\${PROJECT_NAME}" ""
 
   ;Request application privileges for Windows Vista
   RequestExecutionLevel admin
@@ -33,14 +49,18 @@
 ;Pages
 
   !insertmacro MUI_PAGE_WELCOME
-  ;!insertmacro MUI_PAGE_LICENSE "${NSISDIR}\Docs\Modern UI\License.txt"
+  !insertmacro MUI_PAGE_LICENSE "LICENSE.txt"
   !insertmacro MUI_PAGE_COMPONENTS
   !insertmacro MUI_PAGE_DIRECTORY
   !insertmacro MUI_PAGE_INSTFILES
+  !define MUI_FINISHPAGE_RUN
+  !define MUI_FINISHPAGE_RUN_TEXT "Start ${PROJECT_NAME}"
+  !define MUI_FINISHPAGE_RUN_FUNCTION "LaunchLink"
   !insertmacro MUI_PAGE_FINISH
 
   !insertmacro MUI_UNPAGE_WELCOME
   !insertmacro MUI_UNPAGE_CONFIRM
+  !insertmacro MUI_UNPAGE_COMPONENTS
   !insertmacro MUI_UNPAGE_INSTFILES
   !insertmacro MUI_UNPAGE_FINISH
 
@@ -52,35 +72,40 @@
 ;--------------------------------
 ;Installer Sections
 
-Section "Install Progressia" SecDummy
+Section "Install ${PROJECT_NAME}" SEC0000
 
+  SectionIn RO ;Make it read-only
   SetOutPath "$INSTDIR"
+  SetOverwrite on
 
   ;Files
   File Progressia.jar
+  File logo.ico
   File /r lib
 
   ;Store installation folder
   WriteRegStr HKLM SOFTWARE\Progressia "Install_Dir" "$INSTDIR"
 
   ;Create uninstaller
-  
+
-  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\Progressia" "DisplayName" "Progressia (remove only)"
+  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${PROJECT_NAME}" "DisplayName" "${PROJECT_NAME} (remove only)"
-  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\Progressia" "UninstallString" "$INSTDIR\Uninstall.exe" 
+  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${PROJECT_NAME}" "UninstallString" "$INSTDIR\Uninstall.exe"
   WriteUninstaller "$INSTDIR\Uninstall.exe"
-  
+
 SectionEnd
 
-;--------------------------------
+Section "Create Desktop Shortcut" SEC0001
-;Descriptions
+  SetOutPath "$APPDATA\${PROJECT_NAME}"
+  CreateShortCut "$DESKTOP\${PROJECT_NAME}.lnk" "$INSTDIR\${PROJECT_NAME}.jar" "" "$INSTDIR\logo.ico"
+SectionEnd
 
-  ;Language strings
+Section "Start Menu Shortcuts" SEC0002
-  LangString DESC_SecDummy ${LANG_ENGLISH} "A test section."
 
-  ;Assign language strings to sections
+  CreateDirectory "$SMPROGRAMS\${PROJECT_NAME}"
-  !insertmacro MUI_FUNCTION_DESCRIPTION_BEGIN
+  CreateShortcut "$SMPROGRAMS\${PROJECT_NAME}\Uninstall.lnk" "$INSTDIR\Uninstall.exe"
-    !insertmacro MUI_DESCRIPTION_TEXT ${SecDummy} $(DESC_SecDummy)
+  CreateShortcut "$SMPROGRAMS\${PROJECT_NAME}\${PROJECT_NAME}.lnk" "$INSTDIR\${PROJECT_NAME}.jar" "" "$INSTDIR\logo.ico"
-  !insertmacro MUI_FUNCTION_DESCRIPTION_END
+
+SectionEnd
 
 ;--------------------------------
 ;Uninstaller Section
@@ -92,9 +117,45 @@ Section "Uninstall"
   Delete $INSTDIR\Uninstall.exe
   Delete $INSTDIR\Progressia.jar
   Delete $INSTDIR\lib\*.*
+  Delete $INSTDIR\logo.ico
 
-  RMDir /r "$INSTDIR"
+  RMDir $INSTDIR\lib
-  DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\Progressia"
+
-  DeleteRegKey HKLM "Software\Progressia"
+  Delete $DESKTOP\${PROJECT_NAME}.lnk
+
+  Delete $SMPROGRAMS\${PROJECT_NAME}\Uninstall.lnk
+  Delete $SMPROGRAMS\${PROJECT_NAME}\${PROJECT_NAME}.lnk
+
+  RMDir $INSTDIR
+
+  RMDir /r $SMPROGRAMS\${PROJECT_NAME}
+
+  DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${PROJECT_NAME}"
+  DeleteRegKey HKLM "Software\${PROJECT_NAME}"
 
 SectionEnd
+
+Section "un.Remove user data"
+
+  RMDir /r "$APPDATA\${PROJECT_NAME}"
+
+SectionEnd
+
+;--------------------------------
+;Functions
+
+Function LaunchLink
+  SetOutPath "$APPDATA\${PROJECT_NAME}"
+  ExecShell "" "$INSTDIR\${PROJECT_NAME}.jar"
+FunctionEnd
+
+;--------------------------------
+;Descriptions
+
+  ;Language strings
+  LangString DESC_SecDummy ${LANG_ENGLISH} "Install ${PROJECT_NAME}."
+
+  ;Assign language strings to sections
+  !insertmacro MUI_FUNCTION_DESCRIPTION_BEGIN
+  !insertmacro MUI_DESCRIPTION_TEXT ${SEC0000} $(DESC_SecDummy)
+  !insertmacro MUI_FUNCTION_DESCRIPTION_END

docs/CONTRIBUTING.md

@@ -0,0 +1,69 @@
+# Contributing Guidelines
+
+This document lists conventions adopted by Progressia developers.
+
+## git
+
+### Branches
+Progressia repository contains a `master` branch and several "feature" branches.
+
+`master` is expected to contain a version of the game suitable for demonstration and forking/branching. Do not commit directly to `master` without OLEGSHA's approval.
+- `master` must always correctly build without compiler warnings (see below).
+- `master` must always pass all unit tests.
+- `master` must always be able to launch successfully.
+- `master` must always only contain working features.
+- `master` should not contain excessive debug code.
+- `master` must always have its code and filenames formatted (see below).
+
+"Feature" branches are branches dedicated to the development of a single feature. When the feature reaches completion the branch is merged into `master` and removed. Intermediate merges into `master` may occur when some fitting milestone is reached. Intermediate merges from `master` may be done as necessary. Merges between "feature" branches should generally be avoided.
+
+When beginning work on a new feature, create a new branch based on `master` (or on another "feature" branch if absolutely necessary). Use `all-small-with-dashes` to name the branch: `add-trees` or `rebalance-plastics` are good names. Do not fix unrelated bugs or work on unrelated features in a "feature" branch - create a new one, switch to an existing one or commit directly to `master` if the changes are small enough.
+
+"Feature" branches may not be formatted properly. Formatting is required before merging into `master` or other branches.
+
+### Commits
+- Commits must leave the branch in a state that builds without compiler warnings (see below).
+- Changes should be grouped in commits semantically. Avoid committing many small related changes in sequence; if necessary, wait and accumulate them. Avoid committing unrelated changes together; if necessary, split staged changes into several commits. This should normally result in about 1-2 commits for a day's work.
+- Commit bulk changes (renaming, formatting, ...) separately. Don't ever commit whitespace changes outside formatting commits.
+- Message format:
+
+```
+Short description of changes
+<empty line>
+- Enumeration of changes
+  - Nest when appropriate
+- Use dashes only
+- List not needed for small commits
+```
+
+Example:
+
+```
+Changed packages for relations, renamed Face to ShapePart
+
+- Added BlockRelation as an abstract superclass to existing relations
+  - Must be given an absolute "up" direction before use
+- Moved AbsFace, AbsRelation and BlockRelation to .world.rels
+- Renamed Face to ShapePart to reduce confusion with AbsFace
+```
+
+- Only commit changes described in the commit message. Please double-check staged files before committing.
+- Avoid merge conflicts. Pull before committing.
+- Better sign commits than not. See: [git](https://git-scm.com/book/en/v2/Git-Tools-Signing-Your-Work), [GitHub](https://docs.github.com/en/github/authenticating-to-github/managing-commit-signature-verification).
+
+## Code
+
+### Warnings
+Make sure that all committed code contains no compiler warnings. This specifically includes unused imports, unused private members, missing `@Override`s and warnings related to generics.
+
+Warnings about unknown tokens in `@SuppressWarnings` are temporarily ignored. Please disable them in your IDE.
+
+### Code Style
+Formatting code is important.
+
+- The format is specified within the files inside `/templates_and_presets/eclipse_ide`. Import the specifications into Eclipse or IntelliJ IDEA and use the IDEs' format feature. Alternatively format the code manually in accordance with existing files.
+- Only use tabs for indentation. Never indent with spaces even when wrapping lines. This is to ensure that indentation does not break when tab width is different.
+- Don't use `I` prefix for interfaces (not `IDoable` but `Doable`).
+- Prioritize readability over compactness. Do not hesitate to use (very) long identifiers if they aid comprehension.
+- Document all mathematics unless it is trivial, especially when using math notation for variable names.
+- Use proper English when writing comments. Avoid boxes in comments. Use `//` for single-line comments.

src/main/java/ru/windcorp/progressia/ProgressiaLauncher.java

@@ -15,21 +15,31 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+
 package ru.windcorp.progressia;
 
+import ru.windcorp.progressia.client.graphics.GUI;
 import ru.windcorp.progressia.common.util.crash.CrashReports;
 import ru.windcorp.progressia.common.util.crash.analyzers.OutOfMemoryAnalyzer;
 import ru.windcorp.progressia.common.util.crash.providers.*;
+import ru.windcorp.progressia.test.LayerTitle;
 
 public class ProgressiaLauncher {
 
 	public static String[] arguments;
+	private static Proxy proxy;
 
 	public static void launch(String[] args, Proxy proxy) {
 		arguments = args.clone();
 		setupCrashReports();
+
 		proxy.initialize();
+		ProgressiaLauncher.proxy = proxy;
+		GUI.addTopLayer(new LayerTitle("Title"));
+	}
+	
+	public static Proxy getProxy() {
+		return proxy;
 	}
 
 	private static void setupCrashReports() {
@@ -40,6 +50,7 @@ public class ProgressiaLauncher {
 		CrashReports.registerProvider(new OpenALContextProvider());
 		CrashReports.registerProvider(new ArgsContextProvider());
 		CrashReports.registerProvider(new LanguageContextProvider());
+		CrashReports.registerProvider(new ScreenContextProvider());
 		// Analyzers
 		CrashReports.registerAnalyzer(new OutOfMemoryAnalyzer());
 

src/main/java/ru/windcorp/progressia/client/Client.java

@@ -24,7 +24,7 @@ import ru.windcorp.progressia.client.graphics.world.Camera;
 import ru.windcorp.progressia.client.graphics.world.EntityAnchor;
 import ru.windcorp.progressia.client.graphics.world.LocalPlayer;
 import ru.windcorp.progressia.client.world.WorldRender;
-import ru.windcorp.progressia.common.world.WorldData;
+import ru.windcorp.progressia.common.world.DefaultWorldData;
 import ru.windcorp.progressia.common.world.entity.EntityData;
 
 public class Client {
@@ -36,7 +36,7 @@ public class Client {
 
 	private final ServerCommsChannel comms;
 
-	public Client(WorldData world, ServerCommsChannel comms) {
+	public Client(DefaultWorldData world, ServerCommsChannel comms) {
 		this.world = new WorldRender(world, this);
 		this.comms = comms;
 

src/main/java/ru/windcorp/progressia/client/ClientProxy.java

@@ -15,7 +15,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+
 package ru.windcorp.progressia.client;
 
 import ru.windcorp.progressia.Proxy;
@@ -30,14 +30,16 @@ import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
 import ru.windcorp.progressia.client.localization.Localizer;
 import ru.windcorp.progressia.common.resource.ResourceManager;
 import ru.windcorp.progressia.common.util.crash.CrashReports;
-import ru.windcorp.progressia.server.ServerState;
 import ru.windcorp.progressia.test.TestContent;
+import ru.windcorp.progressia.test.TestMusicPlayer;
 
 public class ClientProxy implements Proxy {
 
 	@Override
 	public void initialize() {
+
 		GraphicsBackend.initialize();
+
 		try {
 			RenderTaskQueue.waitAndInvoke(FlatRenderProgram::init);
 			RenderTaskQueue.waitAndInvoke(WorldRenderProgram::init);
@@ -57,8 +59,6 @@ public class ClientProxy implements Proxy {
 
 		AudioSystem.initialize();
 
-		ServerState.startServer();
+		TestMusicPlayer.start();
-		ClientState.connectToLocalServer();
 	}
-
 }

src/main/java/ru/windcorp/progressia/client/ClientState.java

@@ -15,15 +15,18 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+
 package ru.windcorp.progressia.client;
 
 import ru.windcorp.progressia.client.comms.localhost.LocalServerCommsChannel;
 import ru.windcorp.progressia.client.graphics.GUI;
+import ru.windcorp.progressia.client.graphics.Layer;
 import ru.windcorp.progressia.client.graphics.world.LayerWorld;
-import ru.windcorp.progressia.common.world.WorldData;
+import ru.windcorp.progressia.common.world.DefaultWorldData;
+import ru.windcorp.progressia.client.localization.MutableStringLocalized;
 import ru.windcorp.progressia.server.ServerState;
 import ru.windcorp.progressia.test.LayerAbout;
+import ru.windcorp.progressia.test.LayerTestText;
 import ru.windcorp.progressia.test.LayerTestUI;
 import ru.windcorp.progressia.test.TestContent;
 
@@ -41,7 +44,7 @@ public class ClientState {
 
 	public static void connectToLocalServer() {
 
-		WorldData world = new WorldData();
+		DefaultWorldData world = new DefaultWorldData();
 
 		LocalServerCommsChannel channel = new LocalServerCommsChannel(
 			ServerState.getInstance()
@@ -52,11 +55,39 @@ public class ClientState {
 		channel.connect(TestContent.PLAYER_LOGIN);
 
 		setInstance(client);
+		displayLoadingScreen();
 
-		GUI.addBottomLayer(new LayerWorld(client));
+	}
-		GUI.addTopLayer(new LayerTestUI());
-		GUI.addTopLayer(new LayerAbout());
 
+	private static void displayLoadingScreen() {
+		GUI.addTopLayer(new LayerTestText("Text", new MutableStringLocalized("LayerText.Load"), layer -> {
+			Client client = ClientState.getInstance();
+
+			// TODO refacetor and remove
+			if (client != null) {
+				client.getComms().processPackets();
+			}
+			
+			if (client != null && client.getLocalPlayer().hasEntity()) {
+				GUI.removeLayer(layer);
+
+				// TODO refactor, this shouldn't be here
+				LayerWorld layerWorld = new LayerWorld(client);
+				LayerTestUI layerUI = new LayerTestUI();
+				LayerAbout layerAbout = new LayerAbout();
+				GUI.addBottomLayer(layerWorld);
+				GUI.addTopLayer(layerUI);
+				GUI.addTopLayer(layerAbout);
+			}
+		}));
+	}
+
+	public static void disconnectFromLocalServer() {
+		getInstance().getComms().disconnect();
+		
+		for (Layer layer : GUI.getLayers()) {
+			GUI.removeLayer(layer);
+		}
 	}
 
 	private ClientState() {

src/main/java/ru/windcorp/progressia/client/audio/AudioManager.java

@@ -23,6 +23,7 @@ import ru.windcorp.progressia.client.audio.backend.AudioReader;
 import ru.windcorp.progressia.client.audio.backend.Listener;
 import ru.windcorp.progressia.client.audio.backend.SoundType;
 import ru.windcorp.progressia.client.audio.backend.Speaker;
+import ru.windcorp.progressia.common.resource.Resource;
 
 import static org.lwjgl.openal.AL11.*;
 import static org.lwjgl.openal.ALC10.*;
@@ -40,7 +41,6 @@ public class AudioManager {
 
 	private static List<Speaker> soundSpeakers = new ArrayList<>(SOUNDS_NUM);
 	private static Speaker musicSpeaker;
-	private static ArrayList<SoundType> soundsBuffer = new ArrayList<>();
 
 	public static void initAL() {
 		String defaultDeviceName = alcGetString(
@@ -82,31 +82,19 @@ public class AudioManager {
 		return speaker;
 	}
 
-	private static SoundType findSoundType(String soundID) throws Exception {
+	public static Speaker initSpeaker(SoundType st) {
-		for (SoundType s : soundsBuffer) {
-			if (s.getId().equals(soundID)) {
-				return s;
-			}
-		}
-		throw new Exception(
-			"ERROR: The selected sound is not loaded or" +
-				" not exists"
-		);
-	}
-
-	public static Speaker initSpeaker(String soundID) {
 		Speaker speaker = getLastSpeaker();
 		try {
-			findSoundType(soundID).initSpeaker(speaker);
+			st.initSpeaker(speaker);
 		} catch (Exception ex) {
 			throw new RuntimeException();
 		}
 		return speaker;
 	}
 
-	public static Speaker initMusicSpeaker(String soundID) {
+	public static Speaker initMusicSpeaker(SoundType st) {
 		try {
-			findSoundType(soundID).initSpeaker(musicSpeaker);
+			st.initSpeaker(musicSpeaker);
 		} catch (Exception ex) {
 			throw new RuntimeException();
 		}
@@ -120,11 +108,11 @@ public class AudioManager {
 		}
 	}
 
-	public static void loadSound(String path, String id, AudioFormat format) {
+	public static void loadSound(Resource resource, String id, AudioFormat format) {
 		if (format == AudioFormat.MONO) {
-			soundsBuffer.add(AudioReader.readAsMono(path, id));
+			AudioRegistry.getInstance().register(AudioReader.readAsMono(resource, id));
 		} else {
-			soundsBuffer.add(AudioReader.readAsStereo(path, id));
+			AudioRegistry.getInstance().register(AudioReader.readAsStereo(resource, id));
 		}
 	}
 

src/main/java/ru/windcorp/progressia/client/audio/AudioRegistry.java

@@ -0,0 +1,34 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.client.audio;
+
+import ru.windcorp.progressia.client.audio.backend.SoundType;
+import ru.windcorp.progressia.common.util.namespaces.NamespacedInstanceRegistry;
+
+public class AudioRegistry extends NamespacedInstanceRegistry<SoundType> {
+	
+	private static final AudioRegistry INSTANCE = new AudioRegistry();
+	
+	/**
+	 * @return the instance
+	 */
+	public static AudioRegistry getInstance() {
+		return INSTANCE;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/audio/AudioSystem.java

@@ -18,6 +18,8 @@
  
 package ru.windcorp.progressia.client.audio;
 
+import ru.windcorp.progressia.common.resource.ResourceManager;
+
 public class AudioSystem {
 	static public void initialize() {
 		AudioManager.initAL();
@@ -28,7 +30,7 @@ public class AudioSystem {
 
 	static void loadAudioData() {
 		AudioManager.loadSound(
-			"assets/sounds/block_destroy_clap.ogg",
+			ResourceManager.getResource("assets/sounds/block_destroy_clap.ogg"),
 			"Progressia:BlockDestroy",
 			AudioFormat.MONO
 		);

src/main/java/ru/windcorp/progressia/client/audio/Music.java

@@ -19,72 +19,37 @@
 package ru.windcorp.progressia.client.audio;
 
 import glm.vec._3.Vec3;
+import ru.windcorp.progressia.client.audio.backend.SoundType;
 import ru.windcorp.progressia.client.audio.backend.Speaker;
-import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 
-public class Music extends Namespaced {
+public class Music 
-	private Vec3 position = new Vec3();
+	extends Sound {
-	private Vec3 velocity = new Vec3();
+	
-	private float pitch = 1.0f;
+	
-	private float gain = 1.0f;
+	
+	public Music(SoundType soundType, int timeLength, float pitch, float gain) {
+		super(soundType, timeLength, new Vec3(), new Vec3(), pitch, gain);
+	}
+
+	public Music(SoundType soundType) {
+		super(soundType);
+	}
+
+	public Music(String id, int timeLength, float pitch, float gain) {
+		super(id, timeLength, new Vec3(), new Vec3(), pitch, gain);
+	}
 
 	public Music(String id) {
 		super(id);
 	}
 
-	public Music(
+	@Override
-		String id,
+	protected Speaker initSpeaker() {
-		Vec3 position,
+		return AudioManager.initMusicSpeaker(soundType);
-		Vec3 velocity,
-		float pitch,
-		float gain
-	) {
-		this(id);
-		this.position = position;
-		this.velocity = velocity;
-		this.pitch = pitch;
-		this.gain = gain;
 	}
-
+	
-	public void play(boolean loop) {
+	@Override
-		Speaker speaker = AudioManager.initMusicSpeaker(this.getId());
+	public void setPosition(Vec3 position) {
-		speaker.setGain(gain);
+		throw new UnsupportedOperationException();
-		speaker.setPitch(pitch);
-		speaker.setPosition(position);
-		speaker.setVelocity(velocity);
-
-		if (loop) {
-			speaker.playLoop();
-		} else {
-			speaker.play();
-		}
-	}
-
-	public void setGain(float gain) {
-		this.gain = gain;
-	}
-
-	public void setPitch(float pitch) {
-		this.pitch = pitch;
-	}
-
-	public void setVelocity(Vec3 velocity) {
-		this.velocity = velocity;
-	}
-
-	public Vec3 getPosition() {
-		return position;
-	}
-
-	public float getGain() {
-		return gain;
-	}
-
-	public Vec3 getVelocity() {
-		return velocity;
-	}
-
-	public float getPitch() {
-		return pitch;
 	}
 }

src/main/java/ru/windcorp/progressia/client/audio/Sound.java

@@ -19,23 +19,30 @@
 package ru.windcorp.progressia.client.audio;
 
 import glm.vec._3.Vec3;
+import ru.windcorp.progressia.client.audio.backend.SoundType;
 import ru.windcorp.progressia.client.audio.backend.Speaker;
-import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 
-public class SoundEffect
+public class Sound {
-	extends Namespaced {
 
-	private Vec3 position = new Vec3();
+	protected Vec3 position = new Vec3(0f, 0f, 0f);
-	private Vec3 velocity = new Vec3();
+	protected Vec3 velocity = new Vec3(0f, 0f, 0f);
-	private float pitch = 1.0f;
+	protected float pitch = 1.0f;
-	private float gain = 1.0f;
+	protected float gain = 1.0f;
-
+	protected int timeLength = 0;
-	public SoundEffect(String id) {
+	
-		super(id);
+	protected SoundType soundType;
+	
+	public Sound(SoundType soundType) {
+		this.soundType = soundType;
 	}
 
-	public SoundEffect(
+	public Sound(String id) {
+		this(AudioRegistry.getInstance().get(id));
+	}
+	
+	public Sound(
 		String id,
+		int timeLength,
 		Vec3 position,
 		Vec3 velocity,
 		float pitch,
@@ -47,9 +54,28 @@ public class SoundEffect
 		this.pitch = pitch;
 		this.gain = gain;
 	}
+	
+	public Sound(
+		SoundType soundType,
+		int timeLength,
+		Vec3 position,
+		Vec3 velocity,
+		float pitch,
+		float gain
+	) {
+		this(soundType);
+		this.position = position;
+		this.velocity = velocity;
+		this.pitch = pitch;
+		this.gain = gain;
+	}
+	
+	protected Speaker initSpeaker() {
+		return AudioManager.initSpeaker(soundType);
+	}
 
 	public void play(boolean loop) {
-		Speaker speaker = AudioManager.initSpeaker(this.getId());
+		Speaker speaker = initSpeaker();
 		speaker.setGain(gain);
 		speaker.setPitch(pitch);
 		speaker.setPosition(position);
@@ -93,4 +119,9 @@ public class SoundEffect
 	public float getPitch() {
 		return pitch;
 	}
+	
+	public double getDuration() {
+		return soundType.getDuration();
+	}
+
 }

src/main/java/ru/windcorp/progressia/client/audio/backend/AudioReader.java

@@ -33,13 +33,11 @@ public class AudioReader {
 	}
 
 	// TODO fix converting from mono-stereo
-	private static SoundType readAsSpecified(String path, String id, int format) {
+	private static SoundType readAsSpecified(Resource resource, String id, int format) {
 		IntBuffer channelBuffer = BufferUtils.createIntBuffer(1);
 		IntBuffer rateBuffer = BufferUtils.createIntBuffer(1);
 
-		Resource res = ResourceManager.getResource(path);
+		ShortBuffer rawAudio = decodeVorbis(resource, channelBuffer, rateBuffer);
-
-		ShortBuffer rawAudio = decodeVorbis(res, channelBuffer, rateBuffer);
 
 		return new SoundType(
 			id,
@@ -49,12 +47,12 @@ public class AudioReader {
 		);
 	}
 
-	public static SoundType readAsMono(String path, String id) {
+	public static SoundType readAsMono(Resource resource, String id) {
-		return readAsSpecified(path, id, AL_FORMAT_MONO16);
+		return readAsSpecified(resource, id, AL_FORMAT_MONO16);
 	}
 
-	public static SoundType readAsStereo(String path, String id) {
+	public static SoundType readAsStereo(Resource resource, String id) {
-		return readAsSpecified(path, id, AL_FORMAT_STEREO16);
+		return readAsSpecified(resource, id, AL_FORMAT_STEREO16);
 	}
 
 	private static ShortBuffer decodeVorbis(

src/main/java/ru/windcorp/progressia/client/audio/backend/SoundType.java

@@ -21,6 +21,9 @@ package ru.windcorp.progressia.client.audio.backend;
 import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 
 import java.nio.ShortBuffer;
+
+import org.lwjgl.openal.AL10;
+
 import static org.lwjgl.openal.AL11.*;
 
 public class SoundType extends Namespaced {
@@ -29,6 +32,7 @@ public class SoundType extends Namespaced {
 	private int sampleRate;
 	private int format;
 	private int audioBuffer;
+	private double duration;
 
 	public SoundType(
 		String id,
@@ -46,9 +50,14 @@ public class SoundType extends Namespaced {
 	private void createAudioBuffer() {
 		this.audioBuffer = alGenBuffers();
 		alBufferData(audioBuffer, format, rawAudio, sampleRate);
+		duration = rawAudio.limit() / (double) sampleRate / (format == AL10.AL_FORMAT_STEREO16 ? 2 : 1);
 	}
 
 	public void initSpeaker(Speaker speaker) {
 		speaker.setAudioData(audioBuffer);
 	}
-}
+	
+	public double getDuration() {
+		return duration;
+	}
+}

src/main/java/ru/windcorp/progressia/client/audio/backend/Speaker.java

@@ -120,6 +120,7 @@ public class Speaker {
 	}
 
 	public void setAudioData(int audioData) {
+		stop();
 		this.audioData = audioData;
 		alSourcei(this.sourceData, AL_BUFFER, audioData);
 	}

src/main/java/ru/windcorp/progressia/client/comms/controls/ControlTriggerLocalLambda.java

@@ -0,0 +1,53 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package ru.windcorp.progressia.client.comms.controls;
+
+import java.util.function.Consumer;
+import java.util.function.Predicate;
+
+import ru.windcorp.progressia.client.graphics.input.InputEvent;
+import ru.windcorp.progressia.common.comms.controls.PacketControl;
+
+public class ControlTriggerLocalLambda extends ControlTriggerInputBased {
+
+	private final Predicate<InputEvent> predicate;
+	private final Consumer<InputEvent> action;
+
+	public ControlTriggerLocalLambda(
+		String id,
+		Predicate<InputEvent> predicate,
+		Consumer<InputEvent> action
+	) {
+		super(id);
+
+		this.predicate = predicate;
+		this.action = action;
+	}
+
+	@Override
+	public PacketControl onInputEvent(InputEvent event) {
+		if (!predicate.test(event))
+			return null;
+
+		action.accept(event);
+
+		return null;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/comms/controls/ControlTriggers.java

@@ -142,6 +142,96 @@ public class ControlTriggers {
 			predicates
 		);
 	}
+	
+	//
+	//
+	///
+	///
+	//
+	//
+	//
+	//
+	//
+	//
+	//
+	//
+	//
+	
+	public static ControlTriggerInputBased localOf(
+		String id,
+		Consumer<InputEvent> action,
+		Predicate<InputEvent> predicate
+	) {
+		return new ControlTriggerLocalLambda(id, predicate, action);
+	}
+
+	public static ControlTriggerInputBased localOf(
+		String id,
+		Runnable action,
+		Predicate<InputEvent> predicate
+	) {
+		return localOf(
+			id,
+			input -> action.run(),
+			predicate
+		);
+	}
+
+	@SafeVarargs
+	public static <I extends InputEvent> ControlTriggerInputBased localOf(
+		String id,
+		Class<I> inputType,
+		Consumer<I> action,
+		Predicate<I>... predicates
+	) {
+		return localOf(
+			id,
+			createCheckedAction(inputType, action),
+			createCheckedCompoundPredicate(inputType, predicates)
+		);
+	}
+
+	@SafeVarargs
+	public static <I extends InputEvent> ControlTriggerInputBased localOf(
+		String id,
+		Class<I> inputType,
+		Runnable action,
+		Predicate<I>... predicates
+	) {
+		return localOf(
+			id,
+			inputType,
+			input -> action.run(),
+			predicates
+		);
+	}
+
+	@SafeVarargs
+	public static ControlTriggerInputBased localOf(
+		String id,
+		Consumer<InputEvent> action,
+		Predicate<InputEvent>... predicates
+	) {
+		return localOf(
+			id,
+			InputEvent.class,
+			action,
+			predicates
+		);
+	}
+
+	@SafeVarargs
+	public static <I extends InputEvent> ControlTriggerInputBased localOf(
+		String id,
+		Runnable action,
+		Predicate<InputEvent>... predicates
+	) {
+		return of(
+			id,
+			input -> action.run(),
+			predicates
+		);
+	}
 
 	private static <I extends InputEvent> BiConsumer<InputEvent, ControlData> createCheckedDataWriter(
 		Class<I> inputType,
@@ -149,6 +239,13 @@ public class ControlTriggers {
 	) {
 		return (inputEvent, control) -> dataWriter.accept(inputType.cast(inputEvent), control);
 	}
+	
+	private static <I extends InputEvent> Consumer<InputEvent> createCheckedAction(
+		Class<I> inputType,
+		Consumer<I> action
+	) {
+		return inputEvent -> action.accept(inputType.cast(inputEvent));
+	}
 
 	private static <I extends InputEvent> Predicate<InputEvent> createCheckedCompoundPredicate(
 		Class<I> inputType,

src/main/java/ru/windcorp/progressia/client/comms/localhost/LocalClient.java

@@ -15,7 +15,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+
 package ru.windcorp.progressia.client.comms.localhost;
 
 import java.io.IOException;

src/main/java/ru/windcorp/progressia/client/comms/localhost/LocalServerCommsChannel.java

@@ -15,12 +15,13 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+
 package ru.windcorp.progressia.client.comms.localhost;
 
 import ru.windcorp.progressia.client.comms.ServerCommsChannel;
 import ru.windcorp.progressia.common.comms.packets.Packet;
 import ru.windcorp.progressia.server.Server;
+import ru.windcorp.progressia.server.ServerState;
 
 public class LocalServerCommsChannel extends ServerCommsChannel {
 
@@ -54,7 +55,7 @@ public class LocalServerCommsChannel extends ServerCommsChannel {
 
 	@Override
 	public void disconnect() {
-		// Do nothing
+		ServerState.getInstance().getClientManager().disconnectClient(localClient);
 	}
 
 }

src/main/java/ru/windcorp/progressia/client/graphics/Colors.java

@@ -34,7 +34,13 @@ public class Colors {
 		DEBUG_BLUE = toVector(0xFF0000FF),
 		DEBUG_CYAN = toVector(0xFF00FFFF),
 		DEBUG_MAGENTA = toVector(0xFFFF00FF),
-		DEBUG_YELLOW = toVector(0xFFFFFF00);
+		DEBUG_YELLOW = toVector(0xFFFFFF00),
+	
+		LIGHT_GRAY = toVector(0xFFCBCBD0),
+		BLUE = toVector(0xFF37A2E6),
+		HOVER_BLUE = toVector(0xFFC3E4F7),
+		DISABLED_GRAY = toVector(0xFFE5E5E5),
+		DISABLED_BLUE = toVector(0xFFB2D8ED);
 
 	public static Vec4 toVector(int argb) {
 		return toVector(argb, new Vec4());

src/main/java/ru/windcorp/progressia/client/graphics/GUI.java

@@ -15,15 +15,17 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+
 package ru.windcorp.progressia.client.graphics;
 
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.Objects;
 
 import com.google.common.eventbus.Subscribe;
 
+import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
 import ru.windcorp.progressia.client.graphics.input.CursorEvent;
 import ru.windcorp.progressia.client.graphics.input.FrameResizeEvent;
 import ru.windcorp.progressia.client.graphics.input.InputEvent;
@@ -57,15 +59,27 @@ public class GUI {
 	}
 
 	public static void addBottomLayer(Layer layer) {
-		modify(layers -> layers.add(layer));
+		Objects.requireNonNull(layer, "layer");
+		modify(layers -> {
+			layers.add(layer);
+			layer.onAdded();
+		});
 	}
 
 	public static void addTopLayer(Layer layer) {
-		modify(layers -> layers.add(0, layer));
+		Objects.requireNonNull(layer, "layer");
+		modify(layers -> {
+			layers.add(0, layer);
+			layer.onAdded();
+		});
 	}
 
 	public static void removeLayer(Layer layer) {
-		modify(layers -> layers.remove(layer));
+		Objects.requireNonNull(layer, "layer");
+		modify(layers -> {
+			layers.remove(layer);
+			layer.onRemoved();
+		});
 	}
 
 	private static void modify(LayerStackModification mod) {
@@ -78,12 +92,33 @@ public class GUI {
 
 	public static void render() {
 		synchronized (LAYERS) {
-			MODIFICATION_QUEUE.forEach(action -> action.affect(LAYERS));
+
-			MODIFICATION_QUEUE.clear();
+			if (!MODIFICATION_QUEUE.isEmpty()) {
+				MODIFICATION_QUEUE.forEach(action -> action.affect(LAYERS));
+				MODIFICATION_QUEUE.clear();
+
+				boolean isMouseCurrentlyCaptured = GraphicsInterface.isMouseCaptured();
+				Layer.CursorPolicy policy = Layer.CursorPolicy.REQUIRE;
+
+				for (Layer layer : LAYERS) {
+					Layer.CursorPolicy currentPolicy = layer.getCursorPolicy();
+
+					if (currentPolicy != Layer.CursorPolicy.INDIFFERENT) {
+						policy = currentPolicy;
+						break;
+					}
+				}
+
+				boolean shouldCaptureMouse = (policy == Layer.CursorPolicy.FORBID);
+				if (shouldCaptureMouse != isMouseCurrentlyCaptured) {
+					GraphicsInterface.setMouseCaptured(shouldCaptureMouse);
+				}
+			}
 
 			for (int i = LAYERS.size() - 1; i >= 0; --i) {
 				LAYERS.get(i).render();
 			}
+
 		}
 	}
 

src/main/java/ru/windcorp/progressia/client/graphics/Layer.java

@@ -30,15 +30,52 @@ public abstract class Layer {
 	private boolean hasInitialized = false;
 
 	private final AtomicBoolean isValid = new AtomicBoolean(false);
+	
+	/**
+	 * Represents various requests that a {@link Layer} can make regarding the
+	 * presence of a visible cursor. The value of the highest layer that is not
+	 * {@link #INDIFFERENT} is used.
+	 */
+	public static enum CursorPolicy {
+		/**
+		 * Require that a cursor is visible.
+		 */
+		REQUIRE,
+
+		/**
+		 * The {@link Layer} should not affect the presence or absence of a
+		 * visible cursor; lower layers should be consulted.
+		 */
+		INDIFFERENT,
+
+		/**
+		 * Forbid a visible cursor.
+		 */
+		FORBID
+	}
+	
+	private CursorPolicy cursorPolicy = CursorPolicy.INDIFFERENT;
 
 	public Layer(String name) {
 		this.name = name;
 	}
+	
+	public String getName() {
+		return name;
+	}
 
 	@Override
 	public String toString() {
 		return "Layer " + name;
 	}
+	
+	public CursorPolicy getCursorPolicy() {
+		return cursorPolicy;
+	}
+	
+	public void setCursorPolicy(CursorPolicy cursorPolicy) {
+		this.cursorPolicy = cursorPolicy;
+	}
 
 	void render() {
 		GraphicsInterface.startNextLayer();
@@ -78,5 +115,13 @@ public abstract class Layer {
 	protected int getHeight() {
 		return GraphicsInterface.getFrameHeight();
 	}
+	
+	protected void onAdded() {
+		// Do nothing
+	}
+	
+	protected void onRemoved() {
+		// Do nothing
+	}
 
 }

src/main/java/ru/windcorp/progressia/client/graphics/backend/GraphicsBackend.java

@@ -18,11 +18,11 @@
  
 package ru.windcorp.progressia.client.graphics.backend;
 
-import static org.lwjgl.opengl.GL11.*;
-
 import glm.vec._2.i.Vec2i;
+import org.lwjgl.glfw.GLFWVidMode;
 
 import static org.lwjgl.glfw.GLFW.*;
+import static org.lwjgl.opengl.GL11.*;
 
 public class GraphicsBackend {
 
@@ -38,9 +38,30 @@ public class GraphicsBackend {
 
 	private static boolean faceCullingEnabled = false;
 
+	private static boolean isFullscreen = false;
+	private static boolean vSyncEnabled = false;
+	private static boolean isGLFWInitialized = false;
+	private static boolean isOpenGLInitialized = false;
+
 	private GraphicsBackend() {
 	}
 
+	public static boolean isGLFWInitialized() {
+		return isGLFWInitialized;
+	}
+
+	static void setGLFWInitialized(boolean isGLFWInitialized) {
+		GraphicsBackend.isGLFWInitialized = isGLFWInitialized;
+	}
+
+	public static boolean isOpenGLInitialized() {
+		return isOpenGLInitialized;
+	}
+
+	static void setOpenGLInitialized(boolean isOpenGLInitialized) {
+		GraphicsBackend.isOpenGLInitialized = isOpenGLInitialized;
+	}
+	
 	public static void initialize() {
 		startRenderThread();
 	}
@@ -128,4 +149,61 @@ public class GraphicsBackend {
 		faceCullingEnabled = useFaceCulling;
 	}
 
+	public static boolean isFullscreen() {
+		return isFullscreen;
+	}
+
+	public static boolean isVSyncEnabled() {
+		return vSyncEnabled;
+	}
+
+	public static void setFullscreen() {
+		GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
+		glfwSetWindowMonitor(
+			getWindowHandle(),
+			glfwGetPrimaryMonitor(),
+			0,
+			0,
+			vidmode.width(),
+			vidmode.height(),
+			0);
+		isFullscreen = true;
+	}
+
+	public static void setWindowed() {
+		GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
+		glfwSetWindowMonitor(
+			getWindowHandle(),
+			0,
+			(vidmode.width() - getFrameWidth()) / 2,
+			(vidmode.height() - getFrameHeight()) / 2,
+			getFrameWidth(),
+			getFrameHeight(),
+			0);
+		isFullscreen = false;
+	}
+
+	public static void setVSyncEnabled(boolean enable) {
+		glfwSwapInterval(enable ? 1 : 0);
+		vSyncEnabled = enable;
+	}
+
+	public static int getRefreshRate() {
+		GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
+		return vidmode.refreshRate();
+	}
+	
+	public static boolean isMouseCaptured() {
+		return glfwGetInputMode(windowHandle, GLFW_CURSOR) == GLFW_CURSOR_DISABLED;
+	}
+	
+	public static void setMouseCaptured(boolean capture) {
+		int mode = capture ? GLFW_CURSOR_DISABLED : GLFW_CURSOR_NORMAL;
+		glfwSetInputMode(windowHandle, GLFW_CURSOR, mode);
+		
+		if (!capture) {
+			glfwSetCursorPos(windowHandle, FRAME_SIZE.x / 2.0, FRAME_SIZE.y / 2.0);
+		}
+	}
+	
 }

src/main/java/ru/windcorp/progressia/client/graphics/backend/GraphicsInterface.java

@@ -73,4 +73,21 @@ public class GraphicsInterface {
 		GraphicsBackend.startNextLayer();
 	}
 
+	public static void makeFullscreen(boolean state) {
+		if (state) {
+			GraphicsBackend.setFullscreen();
+		} else {
+			GraphicsBackend.setWindowed();
+		}
+		GraphicsBackend.setVSyncEnabled(GraphicsBackend.isVSyncEnabled());
+	}
+	
+	public static boolean isMouseCaptured() {
+		return GraphicsBackend.isMouseCaptured();
+	}
+	
+	public static void setMouseCaptured(boolean capture) {
+		GraphicsBackend.setMouseCaptured(capture);
+	}
+
 }

src/main/java/ru/windcorp/progressia/client/graphics/backend/LWJGLInitializer.java

@@ -50,6 +50,7 @@ class LWJGLInitializer {
 	private static void initializeGLFW() {
 		// TODO Do GLFW error handling: check glfwInit, setup error callback
 		glfwInit();
+		GraphicsBackend.setGLFWInitialized(true);
 	}
 
 	private static void createWindow() {
@@ -64,10 +65,8 @@ class LWJGLInitializer {
 
 		GraphicsBackend.setWindowHandle(handle);
 
-		glfwSetInputMode(handle, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
-
 		glfwMakeContextCurrent(handle);
-		glfwSwapInterval(0);
+		glfwSwapInterval(0);	// TODO: remove after config system is added
 	}
 
 	private static void positionWindow() {
@@ -87,6 +86,7 @@ class LWJGLInitializer {
 		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 
 		RenderTaskQueue.schedule(OpenGLObjectTracker::deleteEnqueuedObjects);
+		GraphicsBackend.setOpenGLInitialized(true);
 	}
 
 	private static void setupWindowCallbacks() {

src/main/java/ru/windcorp/progressia/client/graphics/flat/RenderTarget.java

@@ -29,8 +29,8 @@ import glm.vec._3.Vec3;
 import glm.vec._4.Vec4;
 import ru.windcorp.progressia.client.graphics.Colors;
 import ru.windcorp.progressia.client.graphics.backend.Usage;
-import ru.windcorp.progressia.client.graphics.model.Face;
+import ru.windcorp.progressia.client.graphics.model.ShapePart;
-import ru.windcorp.progressia.client.graphics.model.Faces;
+import ru.windcorp.progressia.client.graphics.model.ShapeParts;
 import ru.windcorp.progressia.client.graphics.model.Shape;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
 import ru.windcorp.progressia.client.graphics.texture.Texture;
@@ -84,7 +84,7 @@ public class RenderTarget {
 
 	private final Deque<TransformedMask> maskStack = new LinkedList<>();
 	private final Deque<Mat4> transformStack = new LinkedList<>();
-	private final List<Face> currentClipFaces = new ArrayList<>();
+	private final List<ShapePart> currentClipFaces = new ArrayList<>();
 
 	private int depth = 0;
 
@@ -94,8 +94,8 @@ public class RenderTarget {
 
 	protected void assembleCurrentClipFromFaces() {
 		if (!currentClipFaces.isEmpty()) {
-			Face[] faces = currentClipFaces.toArray(
+			ShapePart[] faces = currentClipFaces.toArray(
-				new Face[currentClipFaces.size()]
+				new ShapePart[currentClipFaces.size()]
 			);
 			currentClipFaces.clear();
 
@@ -189,16 +189,13 @@ public class RenderTarget {
 
 	public void addCustomRenderer(Renderable renderable) {
 		assembleCurrentClipFromFaces();
-		assembled.add(
+		
-			new Clip(
+		float depth = this.depth--;
-				maskStack,
+		Mat4 transform = new Mat4().translate(0, 0, depth).mul(getTransform());
-				getTransform(),
+		assembled.add(new Clip(maskStack, transform, renderable));
-				renderable
-			)
-		);
 	}
 
-	protected void addFaceToCurrentClip(Face face) {
+	protected void addFaceToCurrentClip(ShapePart face) {
 		currentClipFaces.add(face);
 	}
 
@@ -270,7 +267,7 @@ public class RenderTarget {
 		fill(Colors.toVector(color));
 	}
 
-	public Face createRectagleFace(
+	public ShapePart createRectagleFace(
 		int x,
 		int y,
 		int width,
@@ -280,7 +277,7 @@ public class RenderTarget {
 	) {
 		float depth = this.depth--;
 
-		return Faces.createRectangle(
+		return ShapeParts.createRectangle(
 			FlatRenderProgram.getDefault(),
 			texture,
 			color,
@@ -291,7 +288,7 @@ public class RenderTarget {
 		);
 	}
 
-	public Face createRectagleFace(
+	public ShapePart createRectagleFace(
 		int x,
 		int y,
 		int width,

src/main/java/ru/windcorp/progressia/client/graphics/font/SpriteTypeface.java

@@ -33,8 +33,8 @@ import gnu.trove.stack.TIntStack;
 import gnu.trove.stack.array.TIntArrayStack;
 import ru.windcorp.progressia.client.graphics.Colors;
 import ru.windcorp.progressia.client.graphics.backend.Usage;
-import ru.windcorp.progressia.client.graphics.model.Face;
+import ru.windcorp.progressia.client.graphics.model.ShapePart;
-import ru.windcorp.progressia.client.graphics.model.Faces;
+import ru.windcorp.progressia.client.graphics.model.ShapeParts;
 import ru.windcorp.progressia.client.graphics.model.Shape;
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderProgram;
@@ -144,7 +144,7 @@ public abstract class SpriteTypeface extends Typeface {
 		return new Shape(
 			Usage.STATIC,
 			getProgram(),
-			Faces.createRectangle(
+			ShapeParts.createRectangle(
 				getProgram(),
 				getTexture(c),
 				Colors.WHITE,
@@ -167,7 +167,7 @@ public abstract class SpriteTypeface extends Typeface {
 		private final Renderable unitLine = new Shape(
 			Usage.STATIC,
 			getProgram(),
-			Faces.createRectangle(
+			ShapeParts.createRectangle(
 				getProgram(),
 				null,
 				Vectors.UNIT_4,
@@ -257,7 +257,7 @@ public abstract class SpriteTypeface extends Typeface {
 
 		private class SDWorkspace extends SpriteTypeface.Workspace {
 
-			private final Collection<Face> faces = new ArrayList<>();
+			private final Collection<ShapePart> faces = new ArrayList<>();
 
 			private final Vec3 origin = new Vec3();
 			private final Vec3 width = new Vec3();
@@ -298,7 +298,7 @@ public abstract class SpriteTypeface extends Typeface {
 			workspace.height.sub(workspace.origin);
 
 			workspace.faces.add(
-				Faces.createRectangle(
+				ShapeParts.createRectangle(
 					getProgram(),
 					texture,
 					color,
@@ -314,7 +314,7 @@ public abstract class SpriteTypeface extends Typeface {
 			return new Shape(
 				Usage.STATIC,
 				getProgram(),
-				workspace.faces.toArray(new Face[workspace.faces.size()])
+				workspace.faces.toArray(new ShapePart[workspace.faces.size()])
 			);
 		}
 

src/main/java/ru/windcorp/progressia/client/graphics/gui/BasicButton.java

@@ -0,0 +1,155 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package ru.windcorp.progressia.client.graphics.gui;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Objects;
+import java.util.function.Consumer;
+
+import org.lwjgl.glfw.GLFW;
+
+import com.google.common.eventbus.Subscribe;
+
+import ru.windcorp.progressia.client.graphics.font.Font;
+import ru.windcorp.progressia.client.graphics.gui.event.ButtonEvent;
+import ru.windcorp.progressia.client.graphics.gui.event.EnableEvent;
+import ru.windcorp.progressia.client.graphics.gui.event.FocusEvent;
+import ru.windcorp.progressia.client.graphics.gui.event.HoverEvent;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
+import ru.windcorp.progressia.client.graphics.input.KeyEvent;
+
+public abstract class BasicButton extends Component {
+
+	private final Label label;
+
+	private boolean isPressed = false;
+	private final Collection<Consumer<BasicButton>> actions = Collections.synchronizedCollection(new ArrayList<>());
+
+	public BasicButton(String name, Label label) {
+		super(name);
+		this.label = label;
+
+		setLayout(new LayoutAlign(10));
+		addChild(this.label);
+
+		setFocusable(true);
+		reassembleAt(ARTrigger.HOVER, ARTrigger.FOCUS, ARTrigger.ENABLE);
+
+		// Click triggers
+		addListener(KeyEvent.class, e -> {
+			if (e.isRepeat()) {
+				return false;
+			} else if (
+				e.isLeftMouseButton() ||
+					e.getKey() == GLFW.GLFW_KEY_SPACE ||
+					e.getKey() == GLFW.GLFW_KEY_ENTER
+			) {
+				setPressed(e.isPress());
+				return true;
+			} else {
+				return false;
+			}
+		});
+
+		addListener(new Object() {
+
+			// Release when losing focus
+			@Subscribe
+			public void onFocusChange(FocusEvent e) {
+				if (!e.getNewState()) {
+					setPressed(false);
+				}
+			}
+
+			// Release when hover ends
+			@Subscribe
+			public void onHoverEnded(HoverEvent e) {
+				if (!e.isNowHovered()) {
+					setPressed(false);
+				}
+			}
+
+			// Release when disabled
+			@Subscribe
+			public void onDisabled(EnableEvent e) {
+				if (!e.getComponent().isEnabled()) {
+					setPressed(false);
+				}
+			}
+
+			// Trigger virtualClick when button is released
+			@Subscribe
+			public void onRelease(ButtonEvent.Release e) {
+				virtualClick();
+			}
+
+		});
+	}
+
+	public BasicButton(String name, String label, Font labelFont) {
+		this(name, new Label(name + ".Label", labelFont, label));
+	}
+
+	public BasicButton(String name, String label) {
+		this(name, label, new Font());
+	}
+
+	public boolean isPressed() {
+		return isPressed;
+	}
+
+	public void click() {
+		setPressed(true);
+		setPressed(false);
+	}
+
+	public void setPressed(boolean isPressed) {
+		if (this.isPressed != isPressed) {
+			this.isPressed = isPressed;
+
+			if (isPressed) {
+				takeFocus();
+			}
+
+			dispatchEvent(ButtonEvent.create(this, this.isPressed));
+		}
+	}
+
+	public BasicButton addAction(Consumer<BasicButton> action) {
+		this.actions.add(Objects.requireNonNull(action, "action"));
+		return this;
+	}
+
+	public boolean removeAction(Consumer<BasicButton> action) {
+		return this.actions.remove(action);
+	}
+
+	public void virtualClick() {
+		this.actions.forEach(action -> {
+			action.accept(this);
+		});
+	}
+
+	public Label getLabel() {
+		return label;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/gui/Button.java

@@ -0,0 +1,83 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package ru.windcorp.progressia.client.graphics.gui;
+
+import glm.vec._4.Vec4;
+import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
+import ru.windcorp.progressia.client.graphics.font.Font;
+import ru.windcorp.progressia.client.graphics.Colors;
+
+public class Button extends BasicButton {
+
+	public Button(String name, String label, Font labelFont) {
+		super(name, label, labelFont);
+	}
+
+	public Button(String name, Label label) {
+		super(name, label);
+	}
+
+	public Button(String name, String label) {
+		this(name, label, new Font());
+	}
+
+	@Override
+	protected void assembleSelf(RenderTarget target) {
+		// Border
+
+		Vec4 borderColor;
+		if (isPressed() || isHovered() || isFocused()) {
+			borderColor = Colors.BLUE;
+		} else {
+			borderColor = Colors.LIGHT_GRAY;
+		}
+		target.fill(getX(), getY(), getWidth(), getHeight(), borderColor);
+
+		// Inside area
+
+		if (isPressed()) {
+			// Do nothing
+		} else {
+			Vec4 backgroundColor;
+			if (isHovered() && isEnabled()) {
+				backgroundColor = Colors.HOVER_BLUE;
+			} else {
+				backgroundColor = Colors.WHITE;
+			}
+			target.fill(getX() + 2, getY() + 2, getWidth() - 4, getHeight() - 4, backgroundColor);
+		}
+
+		// Change label font color
+
+		if (isPressed()) {
+			getLabel().setFont(getLabel().getFont().withColor(Colors.WHITE));
+		} else {
+			getLabel().setFont(getLabel().getFont().withColor(Colors.BLACK));
+		}
+	}
+
+	@Override
+	protected void postAssembleSelf(RenderTarget target) {
+		// Apply disable tint
+
+		if (!isEnabled()) {
+			target.fill(getX(), getY(), getWidth(), getHeight(), Colors.toVector(0x88FFFFFF));
+		}
+	}
+}

src/main/java/ru/windcorp/progressia/client/graphics/gui/Checkbox.java

@@ -0,0 +1,149 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.client.graphics.gui;
+
+import glm.vec._2.i.Vec2i;
+import glm.vec._4.Vec4;
+import ru.windcorp.progressia.client.graphics.Colors;
+import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
+import ru.windcorp.progressia.client.graphics.font.Font;
+import ru.windcorp.progressia.client.graphics.font.Typefaces;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutHorizontal;
+
+public class Checkbox extends BasicButton {
+
+	private class Tick extends Component {
+
+		public Tick() {
+			super(Checkbox.this.getName() + ".Tick");
+
+			setPreferredSize(new Vec2i(Typefaces.getDefault().getLineHeight() * 3 / 2));
+		}
+
+		@Override
+		protected void assembleSelf(RenderTarget target) {
+
+			int size = getPreferredSize().x;
+			int x = getX();
+			int y = getY() + (getHeight() - size) / 2;
+
+			// Border
+
+			Vec4 borderColor;
+			if (Checkbox.this.isPressed() || Checkbox.this.isHovered() || Checkbox.this.isFocused()) {
+				borderColor = Colors.BLUE;
+			} else {
+				borderColor = Colors.LIGHT_GRAY;
+			}
+			target.fill(x, y, size, size, borderColor);
+
+			// Inside area
+
+			if (Checkbox.this.isPressed()) {
+				// Do nothing
+			} else {
+				Vec4 backgroundColor;
+				if (Checkbox.this.isHovered() && Checkbox.this.isEnabled()) {
+					backgroundColor = Colors.HOVER_BLUE;
+				} else {
+					backgroundColor = Colors.WHITE;
+				}
+				target.fill(x + 2, y + 2, size - 4, size - 4, backgroundColor);
+			}
+
+			// "Tick"
+
+			if (Checkbox.this.isChecked()) {
+				target.fill(x + 4, y + 4, size - 8, size - 8, Colors.BLUE);
+			}
+		}
+
+	}
+
+	private boolean checked;
+
+	public Checkbox(String name, String label, Font labelFont, boolean check) {
+		super(name, label, labelFont);
+		this.checked = check;
+
+		assert getChildren().size() == 1 : "Checkbox expects that BasicButton contains exactly one child";
+		Component basicChild = getChild(0);
+
+		Group group = new Group(getName() + ".LabelAndTick", new LayoutHorizontal(0, 10));
+		removeChild(basicChild);
+		setLayout(new LayoutAlign(0, 0.5f, 10));
+		group.setLayoutHint(basicChild.getLayoutHint());
+		group.addChild(new Tick());
+		group.addChild(basicChild);
+		addChild(group);
+
+		addAction(b -> switchState());
+	}
+
+	public Checkbox(String name, String label, Font labelFont) {
+		this(name, label, labelFont, false);
+	}
+
+	public Checkbox(String name, String label, boolean check) {
+		this(name, label, new Font(), check);
+	}
+
+	public Checkbox(String name, String label) {
+		this(name, label, false);
+	}
+
+	public void switchState() {
+		setChecked(!isChecked());
+	}
+
+	/**
+	 * @return the checked
+	 */
+	public boolean isChecked() {
+		return checked;
+	}
+
+	/**
+	 * @param checked the checked to set
+	 */
+	public void setChecked(boolean checked) {
+		this.checked = checked;
+	}
+
+	@Override
+	protected void assembleSelf(RenderTarget target) {
+		// Change label font color
+
+		if (isPressed()) {
+			getLabel().setFont(getLabel().getFont().withColor(Colors.BLUE));
+		} else {
+			getLabel().setFont(getLabel().getFont().withColor(Colors.BLACK));
+		}
+	}
+
+	@Override
+	protected void postAssembleSelf(RenderTarget target) {
+		// Apply disable tint
+
+		if (!isEnabled()) {
+			target.fill(getX(), getY(), getWidth(), getHeight(), Colors.toVector(0x88FFFFFF));
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/gui/Component.java

@@ -19,18 +19,23 @@
 package ru.windcorp.progressia.client.graphics.gui;
 
 import java.util.Collections;
+import java.util.EnumMap;
 import java.util.List;
+import java.util.Map;
+import java.util.Objects;
 import java.util.concurrent.CopyOnWriteArrayList;
 
 import org.lwjgl.glfw.GLFW;
 
 import com.google.common.eventbus.EventBus;
+import com.google.common.eventbus.Subscribe;
 
 import glm.vec._2.i.Vec2i;
 import ru.windcorp.progressia.client.graphics.backend.InputTracker;
 import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
 import ru.windcorp.progressia.client.graphics.gui.event.ChildAddedEvent;
 import ru.windcorp.progressia.client.graphics.gui.event.ChildRemovedEvent;
+import ru.windcorp.progressia.client.graphics.gui.event.EnableEvent;
 import ru.windcorp.progressia.client.graphics.gui.event.FocusEvent;
 import ru.windcorp.progressia.client.graphics.gui.event.HoverEvent;
 import ru.windcorp.progressia.client.graphics.gui.event.ParentChangedEvent;
@@ -61,6 +66,8 @@ public class Component extends Named {
 
 	private Object layoutHint = null;
 	private Layout layout = null;
+	
+	private boolean isEnabled = true;
 
 	private boolean isFocusable = false;
 	private boolean isFocused = false;
@@ -285,9 +292,30 @@ public class Component extends Named {
 		return this;
 	}
 
+	/**
+	 * Checks whether this component is focusable. A component needs to be
+	 * focusable to become focused. A component that is focusable may not
+	 * necessarily be ready to gain focus (see {@link #canGainFocusNow()}).
+	 * 
+	 * @return {@code true} iff the component is focusable
+	 * @see #canGainFocusNow()
+	 */
 	public boolean isFocusable() {
 		return isFocusable;
 	}
+	
+	/**
+	 * Checks whether this component can become focused at this moment.
+	 * <p>
+	 * The implementation of this method in {@link Component} considers the
+	 * component a focus candidate if it is both focusable and enabled.
+	 * 
+	 * @return {@code true} iff the component can receive focus
+	 * @see #isFocusable()
+	 */
+	public boolean canGainFocusNow() {
+		return isFocusable() && isEnabled();
+	}
 
 	public Component setFocusable(boolean focusable) {
 		this.isFocusable = focusable;
@@ -337,7 +365,7 @@ public class Component extends Named {
 				return;
 			}
 
-			if (component.isFocusable()) {
+			if (component.canGainFocusNow()) {
 				setFocused(false);
 				component.setFocused(true);
 				return;
@@ -379,7 +407,7 @@ public class Component extends Named {
 				return;
 			}
 
-			if (component.isFocusable()) {
+			if (component.canGainFocusNow()) {
 				setFocused(false);
 				component.setFocused(true);
 				return;
@@ -432,13 +460,52 @@ public class Component extends Named {
 
 		return null;
 	}
+	
+	public boolean isEnabled() {
+		return isEnabled;
+	}
+	
+	/**
+	 * Enables or disables this component. An {@link EnableEvent} is dispatched
+	 * if the state changes.
+	 * 
+	 * @param enabled {@code true} to enable the component, {@code false} to
+	 *                disable the component
+	 * @see #setEnabledRecursively(boolean)
+	 */
+	public void setEnabled(boolean enabled) {
+		if (this.isEnabled != enabled) {
+			if (isFocused() && isEnabled()) {
+				focusNext();
+			}
+			
+			if (isEnabled()) {
+				setHovered(false);
+			}
+
+			this.isEnabled = enabled;
+			dispatchEvent(new EnableEvent(this));
+		}
+	}
+
+	/**
+	 * Enables or disables this component and all of its children recursively.
+	 * 
+	 * @param enabled {@code true} to enable the components, {@code false} to
+	 *                disable the components
+	 * @see #setEnabled(boolean)
+	 */
+	public void setEnabledRecursively(boolean enabled) {
+		setEnabled(enabled);
+		getChildren().forEach(c -> c.setEnabledRecursively(enabled));
+	}
 
 	public boolean isHovered() {
 		return isHovered;
 	}
 
 	protected void setHovered(boolean isHovered) {
-		if (this.isHovered != isHovered) {
+		if (this.isHovered != isHovered && isEnabled()) {
 			this.isHovered = isHovered;
 
 			if (!isHovered && !getChildren().isEmpty()) {
@@ -502,7 +569,7 @@ public class Component extends Named {
 	}
 
 	protected void handleInput(Input input) {
-		if (inputBus != null) {
+		if (inputBus != null && isEnabled()) {
 			inputBus.dispatch(input);
 		}
 	}
@@ -598,6 +665,17 @@ public class Component extends Named {
 		}
 	}
 
+	/**
+	 * Schedules the reassembly to occur.
+	 * <p>
+	 * This method is invoked in root components whenever a
+	 * {@linkplain #requestReassembly() reassembly request} is made by one of
+	 * its children. When creating the dedicated root component, override this
+	 * method to perform any implementation-specific actions that will cause a
+	 * reassembly as soon as possible.
+	 * <p>
+	 * The default implementation of this method does nothing.
+	 */
 	protected void handleReassemblyRequest() {
 		// To be overridden
 	}
@@ -637,6 +715,135 @@ public class Component extends Named {
 	protected void assembleChildren(RenderTarget target) {
 		getChildren().forEach(child -> child.assemble(target));
 	}
+	
+	/*
+	 * Automatic Reassembly
+	 */
+
+	/**
+	 * The various kinds of changes that may be used with
+	 * {@link Component#reassembleAt(ARTrigger...)}.
+	 */
+	protected static enum ARTrigger {
+		/**
+		 * Reassemble the component whenever its hover status changes, e.g.
+		 * whenever the pointer enters or leaves its bounds.
+		 */
+		HOVER,
+
+		/**
+		 * Reassemble the component whenever it gains or loses focus.
+		 * <p>
+		 * <em>Component must be focusable to be able to gain focus.</em> The
+		 * component will not be reassembled unless
+		 * {@link Component#setFocusable(boolean) setFocusable(true)} has been
+		 * invoked.
+		 */
+		FOCUS,
+
+		/**
+		 * Reassemble the component whenever it is enabled or disabled.
+		 */
+		ENABLE
+	}
+
+	/**
+	 * All trigger objects (event listeners) that are currently registered with
+	 * {@link #eventBus}. The field is {@code null} until the first trigger is
+	 * installed.
+	 */
+	private Map<ARTrigger, Object> autoReassemblyTriggerObjects = null;
+
+	private Object createTriggerObject(ARTrigger type) {
+		switch (type) {
+		case HOVER:
+			return new Object() {
+				@Subscribe
+				public void onHoverChanged(HoverEvent e) {
+					requestReassembly();
+				}
+			};
+		case FOCUS:
+			return new Object() {
+				@Subscribe
+				public void onFocusChanged(FocusEvent e) {
+					requestReassembly();
+				}
+			};
+		case ENABLE:
+			return new Object() {
+				@Subscribe
+				public void onEnabled(EnableEvent e) {
+					requestReassembly();
+				}
+			};
+		default:
+			throw new NullPointerException("type");
+		}
+	}
+
+	/**
+	 * Requests that {@link #requestReassembly()} is invoked on this component
+	 * whenever any of the specified changes occur. Duplicate attempts to
+	 * register the same trigger are silently ignored.
+	 * <p>
+	 * {@code triggers} may be empty, which results in a no-op. It must not be
+	 * {@code null}.
+	 * 
+	 * @param triggers the {@linkplain ARTrigger triggers} to
+	 *                 request reassembly with.
+	 * @see #disableAutoReassemblyAt(ARTrigger...)
+	 */
+	protected synchronized void reassembleAt(ARTrigger... triggers) {
+
+		Objects.requireNonNull(triggers, "triggers");
+		if (triggers.length == 0)
+			return;
+
+		if (autoReassemblyTriggerObjects == null) {
+			autoReassemblyTriggerObjects = new EnumMap<>(ARTrigger.class);
+		}
+
+		for (ARTrigger trigger : triggers) {
+			if (!autoReassemblyTriggerObjects.containsKey(trigger)) {
+				Object triggerObject = createTriggerObject(trigger);
+				addListener(trigger);
+				autoReassemblyTriggerObjects.put(trigger, triggerObject);
+			}
+		}
+
+	}
+
+	/**
+	 * Requests that {@link #requestReassembly()} is no longer invoked on this
+	 * component whenever any of the specified changes occur. After a trigger is
+	 * removed, it may be reinstalled with
+	 * {@link #reassembleAt(ARTrigger...)}. Attempts to remove a
+	 * nonexistant trigger are silently ignored.
+	 * <p>
+	 * {@code triggers} may be empty, which results in a no-op. It must not be
+	 * {@code null}.
+	 * 
+	 * @param triggers the {@linkplain ARTrigger triggers} to remove
+	 * @see #reassemblyAt(ARTrigger...)
+	 */
+	protected synchronized void disableAutoReassemblyAt(ARTrigger... triggers) {
+
+		Objects.requireNonNull(triggers, "triggers");
+		if (triggers.length == 0)
+			return;
+
+		if (autoReassemblyTriggerObjects == null)
+			return;
+
+		for (ARTrigger trigger : triggers) {
+			Object triggerObject = autoReassemblyTriggerObjects.remove(trigger);
+			if (triggerObject != null) {
+				removeListener(trigger);
+			}
+		}
+
+	}
 
 	// /**
 	// * Returns a component that displays this component in its center.

src/main/java/ru/windcorp/progressia/client/graphics/gui/Group.java

@@ -16,18 +16,13 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
  
-package ru.windcorp.progressia.common.world.tile;
+package ru.windcorp.progressia.client.graphics.gui;
 
-public interface TileReference {
+public class Group extends Component {
 
-	TileData get();
+	public Group(String name, Layout layout) {
-
+		super(name);
-	int getIndex();
+		setLayout(layout);
-
-	TileDataStack getStack();
-
-	default boolean isValid() {
-		return get() != null;
 	}
 
 }

src/main/java/ru/windcorp/progressia/client/graphics/gui/Label.java

@@ -82,6 +82,11 @@ public class Label extends Component {
 	public Font getFont() {
 		return font;
 	}
+	
+	public void setFont(Font font) {
+		this.font = font;
+		requestReassembly();
+	}
 
 	public String getCurrentText() {
 		return currentText;
@@ -96,11 +101,7 @@ public class Label extends Component {
 		float startX = getX() + font.getAlign() * (getWidth() - currentSize.x);
 
 		target.pushTransform(
-			new Mat4().identity().translate(startX, getY(), -1000) // TODO wtf
+			new Mat4().identity().translate(startX, getY(), 0).scale(2)
-																	// is this
-																	// magic
-																	// <---
-				.scale(2)
 		);
 
 		target.addCustomRenderer(font.assemble(currentText, maxWidth));

src/main/java/ru/windcorp/progressia/client/graphics/gui/Panel.java

@@ -15,14 +15,66 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
 package ru.windcorp.progressia.client.graphics.gui;
 
-public class Panel extends Component {
+import java.util.Objects;
 
+import glm.vec._4.Vec4;
+import ru.windcorp.progressia.client.graphics.Colors;
+import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
+
+public class Panel extends Group {
+
+	private Vec4 fill;
+	private Vec4 border;
+
+	public Panel(String name, Layout layout, Vec4 fill, Vec4 border) {
+		super(name, layout);
+		
+		this.fill = Objects.requireNonNull(fill, "fill");
+		this.border = border;
+	}
+	
 	public Panel(String name, Layout layout) {
-		super(name);
+		this(name, layout, Colors.WHITE, Colors.LIGHT_GRAY);
-		setLayout(layout);
+	}
+	
+	/**
+	 * @return the fill
+	 */
+	public Vec4 getFill() {
+		return fill;
+	}
+	
+	/**
+	 * @param fill the fill to set
+	 */
+	public void setFill(Vec4 fill) {
+		this.fill = Objects.requireNonNull(fill, "fill");
+	}
+	
+	/**
+	 * @return the border
+	 */
+	public Vec4 getBorder() {
+		return border;
+	}
+	
+	/**
+	 * @param border the border to set
+	 */
+	public void setBorder(Vec4 border) {
+		this.border = border;
+	}
+	
+	@Override
+	protected void assembleSelf(RenderTarget target) {
+		if (border == null) {
+			target.fill(getX(), getY(), getWidth(), getHeight(), fill);
+		} else {
+			target.fill(getX(), getY(), getWidth(), getHeight(), border);
+			target.fill(getX() + 2, getY() + 2, getWidth() - 4, getHeight() - 4, fill);
+		}
 	}
 
 }

src/main/java/ru/windcorp/progressia/client/graphics/gui/RadioButton.java

@@ -0,0 +1,208 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.client.graphics.gui;
+
+import org.lwjgl.glfw.GLFW;
+
+import glm.vec._2.i.Vec2i;
+import glm.vec._4.Vec4;
+import ru.windcorp.progressia.client.graphics.Colors;
+import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
+import ru.windcorp.progressia.client.graphics.font.Font;
+import ru.windcorp.progressia.client.graphics.font.Typefaces;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutHorizontal;
+import ru.windcorp.progressia.client.graphics.input.KeyEvent;
+
+public class RadioButton extends BasicButton {
+
+	private class Tick extends Component {
+
+		public Tick() {
+			super(RadioButton.this.getName() + ".Tick");
+
+			setPreferredSize(new Vec2i(Typefaces.getDefault().getLineHeight() * 3 / 2));
+		}
+
+		private void cross(RenderTarget target, int x, int y, int size, Vec4 color) {
+			target.fill(x + 4, y, size - 8, size, color);
+			target.fill(x + 2, y + 2, size - 4, size - 4, color);
+			target.fill(x, y + 4, size, size - 8, color);
+		}
+
+		@Override
+		protected void assembleSelf(RenderTarget target) {
+
+			int size = getPreferredSize().x;
+			int x = getX();
+			int y = getY() + (getHeight() - size) / 2;
+
+			// Border
+
+			Vec4 borderColor;
+			if (RadioButton.this.isPressed() || RadioButton.this.isHovered() || RadioButton.this.isFocused()) {
+				borderColor = Colors.BLUE;
+			} else {
+				borderColor = Colors.LIGHT_GRAY;
+			}
+			cross(target, x, y, size, borderColor);
+
+			// Inside area
+
+			if (RadioButton.this.isPressed()) {
+				// Do nothing
+			} else {
+				Vec4 backgroundColor;
+				if (RadioButton.this.isHovered() && RadioButton.this.isEnabled()) {
+					backgroundColor = Colors.HOVER_BLUE;
+				} else {
+					backgroundColor = Colors.WHITE;
+				}
+				cross(target, x + 2, y + 2, size - 4, backgroundColor);
+			}
+
+			// "Tick"
+
+			if (RadioButton.this.isChecked()) {
+				cross(target, x + 4, y + 4, size - 8, Colors.BLUE);
+			}
+		}
+
+	}
+
+	private boolean checked;
+
+	private RadioButtonGroup group = null;
+
+	public RadioButton(String name, String label, Font labelFont, boolean check) {
+		super(name, label, labelFont);
+		this.checked = check;
+
+		assert getChildren().size() == 1 : "RadioButton expects that BasicButton contains exactly one child";
+		Component basicChild = getChild(0);
+
+		Group group = new Group(getName() + ".LabelAndTick", new LayoutHorizontal(0, 10));
+		removeChild(basicChild);
+		setLayout(new LayoutAlign(0, 0.5f, 10));
+		group.setLayoutHint(basicChild.getLayoutHint());
+		group.addChild(new Tick());
+		group.addChild(basicChild);
+		addChild(group);
+
+		addListener(KeyEvent.class, e -> {
+			if (e.isRelease())
+				return false;
+
+			if (e.getKey() == GLFW.GLFW_KEY_LEFT || e.getKey() == GLFW.GLFW_KEY_UP) {
+				if (this.group != null) {
+					this.group.selectPrevious();
+					this.group.getSelected().takeFocus();
+				}
+
+				return true;
+			} else if (e.getKey() == GLFW.GLFW_KEY_RIGHT || e.getKey() == GLFW.GLFW_KEY_DOWN) {
+				if (this.group != null) {
+					this.group.selectNext();
+					this.group.getSelected().takeFocus();
+				}
+				return true;
+			}
+
+			return false;
+		});
+
+		addAction(b -> setChecked(true));
+	}
+
+	public RadioButton(String name, String label, Font labelFont) {
+		this(name, label, labelFont, false);
+	}
+
+	public RadioButton(String name, String label, boolean check) {
+		this(name, label, new Font(), check);
+	}
+
+	public RadioButton(String name, String label) {
+		this(name, label, false);
+	}
+
+	/**
+	 * @param group the group to set
+	 */
+	public RadioButton setGroup(RadioButtonGroup group) {
+
+		if (this.group != null) {
+			group.selectNext();
+			removeAction(group.listener);
+			group.buttons.remove(this);
+			group.getSelected(); // Clear reference if this was the only button
+									// in the group
+		}
+
+		this.group = group;
+
+		if (this.group != null) {
+			group.buttons.add(this);
+			addAction(group.listener);
+		}
+
+		setChecked(false);
+
+		return this;
+	}
+
+	/**
+	 * @return the checked
+	 */
+	public boolean isChecked() {
+		return checked;
+	}
+
+	/**
+	 * @param checked the checked to set
+	 */
+	public void setChecked(boolean checked) {
+		this.checked = checked;
+
+		if (group != null) {
+			group.listener.accept(this); // Failsafe for manual invocations of
+											// setChecked()
+		}
+	}
+
+	@Override
+	protected void assembleSelf(RenderTarget target) {
+		// Change label font color
+
+		if (isPressed()) {
+			getLabel().setFont(getLabel().getFont().withColor(Colors.BLUE));
+		} else {
+			getLabel().setFont(getLabel().getFont().withColor(Colors.BLACK));
+		}
+	}
+
+	@Override
+	protected void postAssembleSelf(RenderTarget target) {
+		// Apply disable tint
+
+		if (!isEnabled()) {
+			target.fill(getX(), getY(), getWidth(), getHeight(), Colors.toVector(0x88FFFFFF));
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/gui/RadioButtonGroup.java

@@ -0,0 +1,119 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.client.graphics.gui;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.function.Consumer;
+
+public class RadioButtonGroup {
+
+	private final Collection<Consumer<RadioButtonGroup>> actions = Collections.synchronizedCollection(new ArrayList<>());
+	final List<RadioButton> buttons = Collections.synchronizedList(new ArrayList<>());
+	
+	private RadioButton selected = null;
+	
+	Consumer<BasicButton> listener = b -> {
+		if (b instanceof RadioButton && ((RadioButton) b).isChecked() && buttons.contains(b)) {
+			select((RadioButton) b);
+		}
+	};
+	
+	public RadioButtonGroup addAction(Consumer<RadioButtonGroup> action) {
+		this.actions.add(Objects.requireNonNull(action, "action"));
+		return this;
+	}
+	
+	public boolean removeAction(Consumer<BasicButton> action) {
+		return this.actions.remove(action);
+	}
+	
+	public List<RadioButton> getButtons() {
+		return Collections.unmodifiableList(buttons);
+	}
+	
+	public synchronized RadioButton getSelected() {
+		if (!buttons.contains(selected)) {
+			selected = null;
+		}
+		return selected;
+	}
+	
+	public synchronized void select(RadioButton button) {
+		if (button != null && !buttons.contains(button)) {
+			throw new IllegalArgumentException("Button " + button + " is not in the group");
+		}
+		
+		getSelected(); // Clear if invalid
+		
+		if (selected == button) {
+			return; // Terminate listener-setter recursion
+		}
+		
+		if (selected != null) {
+			selected.setChecked(false);
+		}
+		
+		selected = button;
+		
+		if (selected != null) {
+			selected.setChecked(true);
+		}
+		
+		actions.forEach(action -> action.accept(this));
+	}
+	
+	public void selectNext() {
+		selectNeighbour(+1);
+	}
+	
+	public void selectPrevious() {
+		selectNeighbour(-1);
+	}
+	
+	private synchronized void selectNeighbour(int direction) {
+		if (getSelected() == null) {
+			if (buttons.isEmpty()) {
+				throw new IllegalStateException("Cannot select neighbour button: group empty");
+			}
+			
+			select(buttons.get(0));
+		} else {
+			RadioButton button;
+			int index = buttons.indexOf(selected);
+			
+			do {
+				index += direction;
+				
+				if (index >= buttons.size()) {
+					index = 0;
+				} else if (index < 0) {
+					index = buttons.size() - 1;
+				}
+				
+				button = buttons.get(index);
+			} while (button != getSelected() && !button.isEnabled());
+			
+			select(button);
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/gui/event/ButtonEvent.java

@@ -0,0 +1,60 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package ru.windcorp.progressia.client.graphics.gui.event;
+
+import ru.windcorp.progressia.client.graphics.gui.BasicButton;
+
+public class ButtonEvent extends ComponentEvent {
+	
+	public static class Press extends ButtonEvent {
+		public Press(BasicButton button) {
+			super(button, true);
+		}
+	}
+	
+	public static class Release extends ButtonEvent {
+		public Release(BasicButton button) {
+			super(button, false);
+		}
+	}
+	
+	private final boolean isPress;
+
+	protected ButtonEvent(BasicButton button, boolean isPress) {
+		super(button);
+		this.isPress = isPress;
+	}
+	
+	public static ButtonEvent create(BasicButton button, boolean isPress) {
+		if (isPress) {
+			return new Press(button);
+		} else {
+			return new Release(button);
+		}
+	}
+
+	public boolean isPress() {
+		return isPress;
+	}
+
+	public boolean isRelease() {
+		return !isPress;
+	}
+	
+}

src/main/java/ru/windcorp/progressia/client/graphics/gui/event/EnableEvent.java

@@ -0,0 +1,11 @@
+package ru.windcorp.progressia.client.graphics.gui.event;
+
+import ru.windcorp.progressia.client.graphics.gui.Component;
+
+public class EnableEvent extends ComponentEvent {
+
+	public EnableEvent(Component component) {
+		super(component);
+	}
+	
+}

src/main/java/ru/windcorp/progressia/client/graphics/gui/layout/LayoutFill.java

@@ -0,0 +1,78 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package ru.windcorp.progressia.client.graphics.gui.layout;
+
+import static java.lang.Math.max;
+
+import glm.vec._2.i.Vec2i;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.gui.Layout;
+
+public class LayoutFill implements Layout {
+
+	private final int margin;
+	
+	public LayoutFill(int margin) {
+		this.margin = margin;
+	}
+
+	public LayoutFill() {
+		this(0);
+	}
+
+	@Override
+	public void layout(Component c) {
+		c.getChildren().forEach(child -> {
+
+			int cWidth = c.getWidth() - 2 * margin;
+			int cHeight = c.getHeight() - 2 * margin;
+
+			child.setBounds(
+				c.getX() + margin,
+				c.getY() + margin,
+				cWidth,
+				cHeight
+			);
+
+		});
+	}
+
+	@Override
+	public Vec2i calculatePreferredSize(Component c) {
+		Vec2i result = new Vec2i(0, 0);
+
+		c.getChildren().stream()
+			.map(child -> child.getPreferredSize())
+			.forEach(size -> {
+				result.x = max(size.x, result.x);
+				result.y = max(size.y, result.y);
+			});
+
+		result.x += 2 * margin;
+		result.y += 2 * margin;
+
+		return result;
+	}
+
+	@Override
+	public String toString() {
+		return getClass().getSimpleName() + "(" + margin + ")";
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/gui/layout/LayoutGrid.java

@@ -97,16 +97,27 @@ public class LayoutGrid implements Layout {
 		void setBounds(int column, int row, Component child, Component parent) {
 			if (!isSummed)
 				throw new IllegalStateException("Not summed yet");
+			
+			int width, height;
+			
+			if (column == columns.length - 1) {
+				width = parent.getWidth() - margin - columns[column];
+			} else {
+				width = columns[column + 1] - columns[column] - gap;
+			}
+			
+			if (row == rows.length - 1) {
+				height = parent.getHeight() - margin - rows[row];
+			} else {
+				height = rows[row + 1] - rows[row] - gap;
+			}
 
 			child.setBounds(
 				parent.getX() + columns[column],
-				parent.getY() + rows[row],
+				parent.getY() + parent.getHeight() - (rows[row] + height),
 
-				(column != (columns.length - 1) ? (columns[column + 1] - columns[column] - gap)
+				width,
-					: (parent.getWidth() - margin - columns[column])),
+				height
-
-				(row != (rows.length - 1) ? (rows[row + 1] - rows[row] - gap)
-					: (parent.getHeight() - margin - rows[row]))
 			);
 		}
 	}
@@ -132,10 +143,9 @@ public class LayoutGrid implements Layout {
 			GridDimensions grid = calculateGrid(c);
 			grid.sum();
 
-			int[] coords;
 			for (Component child : c.getChildren()) {
-				coords = (int[]) child.getLayoutHint();
+				Vec2i coords = (Vec2i) child.getLayoutHint();
-				grid.setBounds(coords[0], coords[1], child, c);
+				grid.setBounds(coords.x, coords.y, child, c);
 			}
 		}
 	}
@@ -149,11 +159,10 @@ public class LayoutGrid implements Layout {
 
 	private GridDimensions calculateGrid(Component parent) {
 		GridDimensions result = new GridDimensions();
-		int[] coords;
 
 		for (Component child : parent.getChildren()) {
-			coords = (int[]) child.getLayoutHint();
+			Vec2i coords = (Vec2i) child.getLayoutHint();
-			result.add(coords[0], coords[1], child.getPreferredSize());
+			result.add(coords.x, coords.y, child.getPreferredSize());
 		}
 
 		return result;

src/main/java/ru/windcorp/progressia/client/graphics/gui/menu/MenuLayer.java

@@ -0,0 +1,117 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.client.graphics.gui.menu;
+
+import org.lwjgl.glfw.GLFW;
+
+import glm.vec._2.i.Vec2i;
+import ru.windcorp.progressia.client.graphics.Colors;
+import ru.windcorp.progressia.client.graphics.GUI;
+import ru.windcorp.progressia.client.graphics.font.Font;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.gui.GUILayer;
+import ru.windcorp.progressia.client.graphics.gui.Label;
+import ru.windcorp.progressia.client.graphics.gui.Layout;
+import ru.windcorp.progressia.client.graphics.gui.Panel;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutFill;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutVertical;
+import ru.windcorp.progressia.client.graphics.input.InputEvent;
+import ru.windcorp.progressia.client.graphics.input.KeyEvent;
+import ru.windcorp.progressia.client.graphics.input.bus.Input;
+import ru.windcorp.progressia.client.localization.MutableString;
+import ru.windcorp.progressia.client.localization.MutableStringLocalized;
+
+public class MenuLayer extends GUILayer {
+
+	private final Component content;
+	private final Component background;
+	
+	private final Runnable closeAction = () -> {
+		GUI.removeLayer(this);
+	};
+	
+	public MenuLayer(String name, Component content) {
+		super(name, new LayoutFill(0));
+		
+		setCursorPolicy(CursorPolicy.REQUIRE);
+		
+		this.background = new Panel(name + ".Background", new LayoutAlign(10), Colors.toVector(0x66000000), null);
+		this.content = content;
+		
+		background.addChild(content);
+		getRoot().addChild(background);
+	}
+	
+	public MenuLayer(String name, Layout contentLayout) {
+		this(name, new Panel(name + ".Content", contentLayout));
+	}
+	
+	public MenuLayer(String name) {
+		this(name, new LayoutVertical(20, 10));
+	}
+	
+	public Component getContent() {
+		return content;
+	}
+	
+	public Component getBackground() {
+		return background;
+	}
+	
+	protected void addTitle() {
+		String translationKey = "Layer" + getName() + ".Title";
+		MutableString titleText = new MutableStringLocalized(translationKey);
+		Font titleFont = new Font().deriveBold().withColor(Colors.BLACK).withAlign(0.5f);
+		
+		Label label = new Label(getName() + ".Title", titleFont, titleText);
+		getContent().addChild(label);
+		
+		Panel panel = new Panel(getName() + ".Title.Underscore", null, Colors.BLUE, null);
+		panel.setLayout(new LayoutFill() {
+			@Override
+			public Vec2i calculatePreferredSize(Component c) {
+				return new Vec2i(label.getPreferredSize().x + 40, 4);
+			}
+		});
+		getContent().addChild(panel);
+	}
+	
+	protected Runnable getCloseAction() {
+		return closeAction;
+	}
+	
+	@Override
+	protected void handleInput(Input input) {
+		
+		if (!input.isConsumed()) {
+			InputEvent event = input.getEvent();
+			
+			if (event instanceof KeyEvent) {
+				KeyEvent keyEvent = (KeyEvent) event;
+				if (keyEvent.isPress() && keyEvent.getKey() == GLFW.GLFW_KEY_ESCAPE) {
+					getCloseAction().run();
+				}
+			}
+		}
+		
+		super.handleInput(input);
+		input.consume();
+	}
+	
+}

src/main/java/ru/windcorp/progressia/client/graphics/model/BlockFaceVectors.java

@@ -18,23 +18,23 @@
  
 package ru.windcorp.progressia.client.graphics.model;
 
-import static ru.windcorp.progressia.common.world.block.BlockFace.*;
+import static ru.windcorp.progressia.common.world.rels.AbsFace.*;
 
 import com.google.common.collect.ImmutableMap;
 
 import glm.vec._3.Vec3;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
 
 class BlockFaceVectors {
 
 	private static BlockFaceVectors createInner(BlockFaceVectors outer) {
-		ImmutableMap.Builder<BlockFace, Vec3> originBuilder = ImmutableMap.builder();
+		ImmutableMap.Builder<AbsFace, Vec3> originBuilder = ImmutableMap.builder();
 
-		ImmutableMap.Builder<BlockFace, Vec3> widthBuilder = ImmutableMap.builder();
+		ImmutableMap.Builder<AbsFace, Vec3> widthBuilder = ImmutableMap.builder();
 
-		ImmutableMap.Builder<BlockFace, Vec3> heightBuilder = ImmutableMap.builder();
+		ImmutableMap.Builder<AbsFace, Vec3> heightBuilder = ImmutableMap.builder();
 
-		for (BlockFace face : getFaces()) {
+		for (AbsFace face : getFaces()) {
 			Vec3 width = outer.getWidth(face);
 			Vec3 height = outer.getHeight(face);
 
@@ -59,36 +59,36 @@ class BlockFaceVectors {
 
 	static {
 		OUTER = new BlockFaceVectors(
-			ImmutableMap.<BlockFace, Vec3>builder()
+			ImmutableMap.<AbsFace, Vec3>builder()
 
-				.put(TOP, new Vec3(-0.5f, +0.5f, +0.5f))
+				.put(POS_Z, new Vec3(-0.5f, +0.5f, +0.5f))
-				.put(BOTTOM, new Vec3(-0.5f, -0.5f, -0.5f))
+				.put(NEG_Z, new Vec3(-0.5f, -0.5f, -0.5f))
-				.put(NORTH, new Vec3(+0.5f, -0.5f, -0.5f))
+				.put(POS_X, new Vec3(+0.5f, -0.5f, -0.5f))
-				.put(SOUTH, new Vec3(-0.5f, +0.5f, -0.5f))
+				.put(NEG_X, new Vec3(-0.5f, +0.5f, -0.5f))
-				.put(WEST, new Vec3(+0.5f, +0.5f, -0.5f))
+				.put(POS_Y, new Vec3(+0.5f, +0.5f, -0.5f))
-				.put(EAST, new Vec3(-0.5f, -0.5f, -0.5f))
+				.put(NEG_Y, new Vec3(-0.5f, -0.5f, -0.5f))
 
 				.build(),
 
-			ImmutableMap.<BlockFace, Vec3>builder()
+			ImmutableMap.<AbsFace, Vec3>builder()
 
-				.put(TOP, new Vec3(0, -1, 0))
+				.put(POS_Z, new Vec3(0, -1, 0))
-				.put(BOTTOM, new Vec3(0, +1, 0))
+				.put(NEG_Z, new Vec3(0, +1, 0))
-				.put(NORTH, new Vec3(0, +1, 0))
+				.put(POS_X, new Vec3(0, +1, 0))
-				.put(SOUTH, new Vec3(0, -1, 0))
+				.put(NEG_X, new Vec3(0, -1, 0))
-				.put(WEST, new Vec3(-1, 0, 0))
+				.put(POS_Y, new Vec3(-1, 0, 0))
-				.put(EAST, new Vec3(+1, 0, 0))
+				.put(NEG_Y, new Vec3(+1, 0, 0))
 
 				.build(),
 
-			ImmutableMap.<BlockFace, Vec3>builder()
+			ImmutableMap.<AbsFace, Vec3>builder()
 
-				.put(TOP, new Vec3(+1, 0, 0))
+				.put(POS_Z, new Vec3(+1, 0, 0))
-				.put(BOTTOM, new Vec3(+1, 0, 0))
+				.put(NEG_Z, new Vec3(+1, 0, 0))
-				.put(NORTH, new Vec3(0, 0, +1))
+				.put(POS_X, new Vec3(0, 0, +1))
-				.put(SOUTH, new Vec3(0, 0, +1))
+				.put(NEG_X, new Vec3(0, 0, +1))
-				.put(WEST, new Vec3(0, 0, +1))
+				.put(POS_Y, new Vec3(0, 0, +1))
-				.put(EAST, new Vec3(0, 0, +1))
+				.put(NEG_Y, new Vec3(0, 0, +1))
 
 				.build()
 		);
@@ -100,29 +100,29 @@ class BlockFaceVectors {
 		return inner ? INNER : OUTER;
 	}
 
-	private final ImmutableMap<BlockFace, Vec3> origins;
+	private final ImmutableMap<AbsFace, Vec3> origins;
-	private final ImmutableMap<BlockFace, Vec3> widths;
+	private final ImmutableMap<AbsFace, Vec3> widths;
-	private final ImmutableMap<BlockFace, Vec3> heights;
+	private final ImmutableMap<AbsFace, Vec3> heights;
 
 	public BlockFaceVectors(
-		ImmutableMap<BlockFace, Vec3> origins,
+		ImmutableMap<AbsFace, Vec3> origins,
-		ImmutableMap<BlockFace, Vec3> widths,
+		ImmutableMap<AbsFace, Vec3> widths,
-		ImmutableMap<BlockFace, Vec3> heights
+		ImmutableMap<AbsFace, Vec3> heights
 	) {
 		this.origins = origins;
 		this.widths = widths;
 		this.heights = heights;
 	}
 
-	public Vec3 getOrigin(BlockFace face) {
+	public Vec3 getOrigin(AbsFace face) {
 		return origins.get(face);
 	}
 
-	public Vec3 getWidth(BlockFace face) {
+	public Vec3 getWidth(AbsFace face) {
 		return widths.get(face);
 	}
 
-	public Vec3 getHeight(BlockFace face) {
+	public Vec3 getHeight(AbsFace face) {
 		return heights.get(face);
 	}
 }

src/main/java/ru/windcorp/progressia/client/graphics/model/Shape.java

@@ -30,10 +30,10 @@ import ru.windcorp.progressia.client.graphics.backend.VertexBufferObject;
 public class Shape implements Renderable {
 
 	private final ShapeRenderProgram program;
-	private final Face[] faces;
+	private final ShapePart[] parts;
 	private final Usage usage;
 
-	private FaceGroup[] groups;
+	private ShapePartGroup[] groups;
 
 	private ByteBuffer vertices;
 	private ShortBuffer indices;
@@ -45,33 +45,33 @@ public class Shape implements Renderable {
 	private VertexBufferObject verticesVbo;
 	private VertexBufferObject indicesVbo;
 
-	public Shape(Usage usage, ShapeRenderProgram program, Face... faces) {
+	public Shape(Usage usage, ShapeRenderProgram program, ShapePart... parts) {
 		this.program = program;
-		this.faces = faces;
+		this.parts = parts;
 		this.usage = usage;
 
-		configureFaces();
+		configureParts();
 		program.preprocess(this);
 
 		assembleBuffers();
 	}
 
-	private void configureFaces() {
+	private void configureParts() {
-		for (Face face : faces) {
+		for (ShapePart part : parts) {
-			face.setShape(this);
+			part.setShape(this);
 		}
 	}
 
 	private void assembleBuffers() {
 		// TODO optimize: only update faces that requested it
 
-		sortFaces();
+		sortParts();
 		resizeBuffers();
 
-		for (Face face : faces) {
+		for (ShapePart part : parts) {
-			assembleVertices(face);
+			assembleVertices(part);
-			assembleIndices(face);
+			assembleIndices(part);
-			face.resetUpdateFlags();
+			part.resetUpdateFlags();
 		}
 
 		this.vertices.flip();
@@ -85,110 +85,110 @@ public class Shape implements Renderable {
 
 	private void resizeBuffers() {
 		int verticesRequired = 0, indicesRequired = 0;
-		for (Face face : faces) {
+		for (ShapePart part : parts) {
-			verticesRequired += face.getVertices().remaining();
+			verticesRequired += part.getVertices().remaining();
-			indicesRequired += face.getIndices().remaining();
+			indicesRequired += part.getIndices().remaining();
 		}
 
-		if (this.vertices == null || vertices.capacity() < verticesRequired) {
+		if (vertices == null || vertices.capacity() < verticesRequired) {
 			this.vertices = BufferUtils.createByteBuffer(verticesRequired);
 		} else {
-			this.vertices.position(0).limit(verticesRequired);
+			vertices.position(0).limit(verticesRequired);
 		}
 
-		if (this.indices == null || this.indices.capacity() < indicesRequired) {
+		if (indices == null || indices.capacity() < indicesRequired) {
 			this.indices = BufferUtils.createShortBuffer(indicesRequired);
 		} else {
-			this.indices.position(0).limit(indicesRequired);
+			indices.position(0).limit(indicesRequired);
 		}
 	}
 
-	private void assembleVertices(Face face) {
+	private void assembleVertices(ShapePart part) {
-		face.locationOfVertices = this.vertices.position();
+		part.locationOfVertices = this.vertices.position();
 
-		insertVertices(face);
+		insertVertices(part);
-		linkVerticesWith(face);
+		linkVerticesWith(part);
 	}
 
-	private void insertVertices(Face face) {
+	private void insertVertices(ShapePart part) {
-		ByteBuffer faceVertices = face.getVertices();
+		ByteBuffer partVertices = part.getVertices();
 
-		faceVertices.mark();
+		partVertices.mark();
-		this.vertices.put(faceVertices);
+		this.vertices.put(partVertices);
-		faceVertices.reset();
+		partVertices.reset();
 	}
 
-	private void linkVerticesWith(Face face) {
+	private void linkVerticesWith(ShapePart part) {
 		int limit = vertices.limit();
 		int position = vertices.position();
 
-		vertices.limit(position).position(face.getLocationOfVertices());
+		vertices.limit(position).position(part.getLocationOfVertices());
-		face.vertices = vertices.slice();
+		part.vertices = vertices.slice();
 
 		vertices.position(position).limit(limit);
 	}
 
-	private void assembleIndices(Face face) {
+	private void assembleIndices(ShapePart part) {
-		short vertexOffset = (short) (face.getLocationOfVertices() / program.getBytesPerVertex());
+		short vertexOffset = (short) (part.getLocationOfVertices() / program.getBytesPerVertex());
 
-		face.locationOfIndices = indices.position();
+		part.locationOfIndices = indices.position();
 
-		ShortBuffer faceIndices = face.getIndices();
+		ShortBuffer partIndices = part.getIndices();
 
-		if (faceIndices == null) {
+		if (partIndices == null) {
-			for (int i = 0; i < face.getVertexCount(); ++i) {
+			for (int i = 0; i < part.getVertexCount(); ++i) {
 				this.indices.put((short) (vertexOffset + i));
 			}
 		} else {
-			for (int i = faceIndices.position(); i < faceIndices.limit(); ++i) {
+			for (int i = partIndices.position(); i < partIndices.limit(); ++i) {
-				short faceIndex = faceIndices.get(i);
+				short partIndex = partIndices.get(i);
-				faceIndex += vertexOffset;
+				partIndex += vertexOffset;
-				this.indices.put(faceIndex);
+				this.indices.put(partIndex);
 			}
 		}
 	}
 
-	private void sortFaces() {
+	private void sortParts() {
-		Arrays.sort(faces);
+		Arrays.sort(parts);
 	}
 
 	private void assembleGroups() {
-		int unique = countUniqueFaces();
+		int unique = countUniqueParts();
-		this.groups = new FaceGroup[unique];
+		this.groups = new ShapePartGroup[unique];
 
-		if (faces.length == 0)
+		if (parts.length == 0)
 			return;
 
-		int previousHandle = faces[0].getSortingIndex();
+		int previousHandle = parts[0].getSortingIndex();
 		int start = 0;
 		int groupIndex = 0;
 
-		for (int i = 1; i < faces.length; ++i) {
+		for (int i = 1; i < parts.length; ++i) {
-			if (previousHandle != faces[i].getSortingIndex()) {
+			if (previousHandle != parts[i].getSortingIndex()) {
 
-				groups[groupIndex] = new FaceGroup(faces, start, i);
+				groups[groupIndex] = new ShapePartGroup(parts, start, i);
 				start = i;
 				groupIndex++;
 
-				previousHandle = faces[i].getSortingIndex();
+				previousHandle = parts[i].getSortingIndex();
 			}
 		}
 
 		assert groupIndex == groups.length - 1;
-		groups[groupIndex] = new FaceGroup(faces, start, faces.length);
+		groups[groupIndex] = new ShapePartGroup(parts, start, parts.length);
 	}
 
-	private int countUniqueFaces() {
+	private int countUniqueParts() {
-		if (faces.length == 0)
+		if (parts.length == 0)
 			return 0;
 
 		int result = 1;
-		int previousHandle = faces[0].getSortingIndex();
+		int previousHandle = parts[0].getSortingIndex();
 
-		for (int i = 1; i < faces.length; ++i) {
+		for (int i = 1; i < parts.length; ++i) {
-			if (previousHandle != faces[i].getSortingIndex()) {
+			if (previousHandle != parts[i].getSortingIndex()) {
 				result++;
-				previousHandle = faces[i].getSortingIndex();
+				previousHandle = parts[i].getSortingIndex();
 			}
 		}
 
@@ -238,11 +238,11 @@ public class Shape implements Renderable {
 		return program;
 	}
 
-	public Face[] getFaces() {
+	public ShapePart[] getParts() {
-		return faces;
+		return parts;
 	}
 
-	public FaceGroup[] getGroups() {
+	public ShapePartGroup[] getGroups() {
 		return groups;
 	}
 

src/main/java/ru/windcorp/progressia/client/graphics/model/ShapePart.java

@@ -24,7 +24,7 @@ import java.util.Objects;
 
 import ru.windcorp.progressia.client.graphics.texture.Texture;
 
-public class Face implements Comparable<Face> {
+public class ShapePart implements Comparable<ShapePart> {
 
 	private static final ShortBuffer GENERATE_SUCCESSIVE_LATER = null;
 
@@ -40,7 +40,7 @@ public class Face implements Comparable<Face> {
 	private ShortBuffer userIndices;
 	private boolean userIndicesUpdated = true;
 
-	public Face(
+	public ShapePart(
 		Texture texture,
 		ByteBuffer vertices,
 		ShortBuffer indices
@@ -50,7 +50,7 @@ public class Face implements Comparable<Face> {
 		setIndices(indices);
 	}
 
-	public Face(
+	public ShapePart(
 		Texture texture,
 		ByteBuffer vertices
 	) {
@@ -155,7 +155,7 @@ public class Face implements Comparable<Face> {
 		return vertices;
 	}
 
-	public Face setVertices(ByteBuffer vertices) {
+	public ShapePart setVertices(ByteBuffer vertices) {
 		this.vertices = Objects.requireNonNull(vertices, "vertices");
 		markForVertexUpdate();
 		return this;
@@ -202,7 +202,7 @@ public class Face implements Comparable<Face> {
 		return userIndices.remaining();
 	}
 
-	public Face setIndices(ShortBuffer indices) {
+	public ShapePart setIndices(ShortBuffer indices) {
 		if (indices == null) {
 			indices = GENERATE_SUCCESSIVE_LATER;
 		}
@@ -245,7 +245,7 @@ public class Face implements Comparable<Face> {
 	}
 
 	@Override
-	public int compareTo(Face o) {
+	public int compareTo(ShapePart o) {
 		return Integer.compare(getSortingIndex(), o.getSortingIndex());
 	}
 

src/main/java/ru/windcorp/progressia/client/graphics/model/ShapePartGroup.java

@@ -21,13 +21,13 @@ package ru.windcorp.progressia.client.graphics.model;
 import ru.windcorp.progressia.client.graphics.texture.Texture;
 import ru.windcorp.progressia.client.graphics.texture.TexturePrimitive;
 
-public class FaceGroup {
+public class ShapePartGroup {
 
 	private final TexturePrimitive texture;
 	private final int indexCount;
 	private final int byteOffsetOfIndices;
 
-	FaceGroup(Face[] faces, int start, int end) {
+	ShapePartGroup(ShapePart[] faces, int start, int end) {
 
 		Texture t = faces[start].getTexture();
 		this.texture = t == null ? null : t.getSprite().getPrimitive();
@@ -36,7 +36,7 @@ public class FaceGroup {
 		int indexCount = 0;
 
 		for (int i = start; i < end; ++i) {
-			Face face = faces[i];
+			ShapePart face = faces[i];
 
 			assert this.texture == null
 				? (face.getTexture() == null)

src/main/java/ru/windcorp/progressia/client/graphics/model/ShapeParts.java

@@ -25,14 +25,14 @@ import glm.vec._3.Vec3;
 import glm.vec._4.Vec4;
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderProgram.VertexBuilder;
 import ru.windcorp.progressia.client.graphics.texture.Texture;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
 
-public class Faces {
+public class ShapeParts {
 
-	private Faces() {
+	private ShapeParts() {
 	}
 
-	public static Face createRectangle(
+	public static ShapePart createRectangle(
 		ShapeRenderProgram program,
 		Texture texture,
 		Vec4 colorMultiplier,
@@ -82,19 +82,19 @@ public class Faces {
 				}
 			);
 
-		return new Face(
+		return new ShapePart(
 			texture,
 			builder.assemble(),
 			buffer
 		);
 	}
 
-	public static Face createBlockFace(
+	public static ShapePart createBlockFace(
 		ShapeRenderProgram program,
 		Texture texture,
 		Vec4 colorMultiplier,
 		Vec3 blockCenter,
-		BlockFace face,
+		AbsFace face,
 		boolean inner
 	) {
 		BlockFaceVectors vectors = BlockFaceVectors.get(inner);

src/main/java/ru/windcorp/progressia/client/graphics/model/ShapeRenderProgram.java

@@ -116,7 +116,7 @@ public class ShapeRenderProgram extends Program {
 
 		try {
 			enableAttributes();
-			for (FaceGroup group : shape.getGroups()) {
+			for (ShapePartGroup group : shape.getGroups()) {
 				renderFaceGroup(group);
 			}
 		} finally {
@@ -182,7 +182,7 @@ public class ShapeRenderProgram extends Program {
 		indices.bind(BindTarget.ELEMENT_ARRAY);
 	}
 
-	protected void renderFaceGroup(FaceGroup group) {
+	protected void renderFaceGroup(ShapePartGroup group) {
 		TexturePrimitive texture = group.getTexture();
 
 		if (texture != null) {
@@ -206,12 +206,12 @@ public class ShapeRenderProgram extends Program {
 	}
 
 	public void preprocess(Shape shape) {
-		for (Face face : shape.getFaces()) {
+		for (ShapePart face : shape.getParts()) {
 			applySprites(face);
 		}
 	}
 
-	private void applySprites(Face face) {
+	private void applySprites(ShapePart face) {
 		if (face.getTexture() == null)
 			return;
 

src/main/java/ru/windcorp/progressia/client/graphics/model/Shapes.java

@@ -24,7 +24,7 @@ import glm.vec._3.Vec3;
 import glm.vec._4.Vec4;
 import ru.windcorp.progressia.client.graphics.backend.Usage;
 import ru.windcorp.progressia.client.graphics.texture.Texture;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
 
 public class Shapes {
 
@@ -50,7 +50,7 @@ public class Shapes {
 		boolean flip
 	) {
 
-		Face top = Faces.createRectangle(
+		ShapePart top = ShapeParts.createRectangle(
 			program,
 			topTexture,
 			colorMultiplier,
@@ -60,7 +60,7 @@ public class Shapes {
 			flip
 		);
 
-		Face bottom = Faces.createRectangle(
+		ShapePart bottom = ShapeParts.createRectangle(
 			program,
 			bottomTexture,
 			colorMultiplier,
@@ -70,7 +70,7 @@ public class Shapes {
 			flip
 		);
 
-		Face north = Faces.createRectangle(
+		ShapePart north = ShapeParts.createRectangle(
 			program,
 			northTexture,
 			colorMultiplier,
@@ -80,7 +80,7 @@ public class Shapes {
 			flip
 		);
 
-		Face south = Faces.createRectangle(
+		ShapePart south = ShapeParts.createRectangle(
 			program,
 			southTexture,
 			colorMultiplier,
@@ -90,7 +90,7 @@ public class Shapes {
 			flip
 		);
 
-		Face east = Faces.createRectangle(
+		ShapePart east = ShapeParts.createRectangle(
 			program,
 			eastTexture,
 			colorMultiplier,
@@ -100,7 +100,7 @@ public class Shapes {
 			flip
 		);
 
-		Face west = Faces.createRectangle(
+		ShapePart west = ShapeParts.createRectangle(
 			program,
 			westTexture,
 			colorMultiplier,
@@ -165,16 +165,16 @@ public class Shapes {
 
 		public PppBuilder(
 			ShapeRenderProgram program,
-			Map<BlockFace, Texture> textureMap
+			Map<AbsFace, Texture> textureMap
 		) {
 			this(
 				program,
-				textureMap.get(BlockFace.TOP),
+				textureMap.get(AbsFace.POS_Z),
-				textureMap.get(BlockFace.BOTTOM),
+				textureMap.get(AbsFace.NEG_Z),
-				textureMap.get(BlockFace.NORTH),
+				textureMap.get(AbsFace.POS_X),
-				textureMap.get(BlockFace.SOUTH),
+				textureMap.get(AbsFace.NEG_X),
-				textureMap.get(BlockFace.EAST),
+				textureMap.get(AbsFace.NEG_Y),
-				textureMap.get(BlockFace.WEST)
+				textureMap.get(AbsFace.POS_Y)
 			);
 		}
 

src/main/java/ru/windcorp/progressia/client/graphics/model/StaticModel.java

@@ -38,10 +38,6 @@ public class StaticModel extends Model {
 		this.transforms = transforms;
 	}
 
-	public StaticModel(Builder builder) {
-		this(builder.getParts(), builder.getTransforms());
-	}
-
 	@Override
 	protected Mat4 getTransform(int partIndex) {
 		return transforms[partIndex];
@@ -82,6 +78,10 @@ public class StaticModel extends Model {
 		private Mat4[] getTransforms() {
 			return transforms.toArray(new Mat4[transforms.size()]);
 		}
+		
+		public StaticModel build() {
+			return new StaticModel(getParts(), getTransforms());
+		}
 
 	}
 

src/main/java/ru/windcorp/progressia/client/graphics/texture/ComplexTexture.java

@@ -21,7 +21,7 @@ package ru.windcorp.progressia.client.graphics.texture;
 import java.util.Map;
 
 import glm.vec._2.Vec2;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
 
 public class ComplexTexture {
 
@@ -54,14 +54,14 @@ public class ComplexTexture {
 		);
 	}
 
-	public Map<BlockFace, Texture> getCuboidTextures(
+	public Map<AbsFace, Texture> getCuboidTextures(
 		int x,
 		int y,
 		int width,
 		int height,
 		int depth
 	) {
-		return BlockFace.mapToFaces(
+		return AbsFace.mapToFaces(
 			get(
 				x + depth + width,
 				y + height + depth,
@@ -86,7 +86,7 @@ public class ComplexTexture {
 		);
 	}
 
-	public Map<BlockFace, Texture> getCuboidTextures(
+	public Map<AbsFace, Texture> getCuboidTextures(
 		int x,
 		int y,
 		int size

src/main/java/ru/windcorp/progressia/client/graphics/world/Camera.java

@@ -29,6 +29,9 @@ import glm.mat._4.Mat4;
 import glm.vec._3.Vec3;
 import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
 import ru.windcorp.progressia.client.graphics.world.Camera.Anchor.Mode;
+import ru.windcorp.progressia.client.world.entity.NPedModel;
+import ru.windcorp.progressia.common.util.Matrices;
+import ru.windcorp.progressia.common.util.Vectors;
 
 public class Camera {
 
@@ -60,13 +63,13 @@ public class Camera {
 			}
 		}
 
-		void getCameraPosition(Vec3 output);
+		Vec3 getCameraPosition(Vec3 output);
 
-		void getCameraVelocity(Vec3 output);
+		Vec3 getCameraVelocity(Vec3 output);
 
-		float getCameraYaw();
+		Vec3 getLookingAt(Vec3 output);
-
+		
-		float getCameraPitch();
+		Vec3 getUpVector(Vec3 output);
 
 		Collection<Mode> getCameraModes();
 
@@ -84,14 +87,11 @@ public class Camera {
 	 */
 
 	private final Vec3 lastAnchorPosition = new Vec3();
-	private float lastAnchorYaw;
+	private final Vec3 lastAnchorLookingAt = new Vec3();
-	private float lastAnchorPitch;
+	private final Vec3 lastAnchorUpVector = new Vec3();
 
 	private final Mat4 lastCameraMatrix = new Mat4();
 
-	private final Vec3 lastAnchorLookingAt = new Vec3();
-	private final Vec3 lastAnchorUp = new Vec3();
-
 	{
 		invalidateCache();
 	}
@@ -108,6 +108,9 @@ public class Camera {
 	 */
 
 	public void apply(WorldRenderHelper helper) {
+		if (NPedModel.flag) {
+//			System.out.println("Camera.apply()");
+		}
 		applyPerspective(helper);
 		rotateCoordinateSystem(helper);
 
@@ -149,26 +152,34 @@ public class Camera {
 	}
 
 	private void applyDirection(WorldRenderHelper helper) {
-		float pitch = anchor.getCameraPitch();
+		anchor.getLookingAt(lastAnchorLookingAt);
-		float yaw = anchor.getCameraYaw();
+		anchor.getUpVector(lastAnchorUpVector);
 
-		helper.pushViewTransform()
+		lookAt(helper.pushViewTransform());
-			.rotateY(-pitch)
+	}
-			.rotateZ(-yaw);
 
-		this.lastAnchorYaw = yaw;
+	private void lookAt(Mat4 result) {
-		this.lastAnchorPitch = pitch;
+		Vec3 f = this.lastAnchorLookingAt;
-
+		Vec3 s = Vectors.grab3();
-		this.lastAnchorLookingAt.set(
+		Vec3 u = Vectors.grab3();
-			cos(pitch) * cos(yaw),
+		
-			cos(pitch) * sin(yaw),
+		f.cross(this.lastAnchorUpVector, s);
-			sin(pitch)
+		s.normalize();
-		);
+		
-		this.lastAnchorUp.set(
+		s.cross(f, u);
-			cos(pitch + PI_F / 2) * cos(yaw),
+		
-			cos(pitch + PI_F / 2) * sin(yaw),
+		Mat4 workspace = Matrices.grab4();
-			sin(pitch + PI_F / 2)
+		workspace.set(
+			+f.x, -s.x, +u.x,    0,
+			+f.y, -s.y, +u.y,    0,
+			+f.z, -s.z, +u.z,    0,
+			   0,    0,    0,    1
 		);
+		result.mul(workspace);
+		Matrices.release(workspace);
+		
+		Vectors.release(s);
+		Vectors.release(u);
 	}
 
 	private void applyPosition(WorldRenderHelper helper) {
@@ -247,8 +258,6 @@ public class Camera {
 
 	private void invalidateCache() {
 		this.lastAnchorPosition.set(Float.NaN);
-		this.lastAnchorYaw = Float.NaN;
-		this.lastAnchorPitch = Float.NaN;
 
 		this.lastCameraMatrix.set(
 			Float.NaN,
@@ -270,7 +279,7 @@ public class Camera {
 		);
 
 		this.lastAnchorLookingAt.set(Float.NaN);
-		this.lastAnchorUp.set(Float.NaN);
+		this.lastAnchorUpVector.set(Float.NaN);
 	}
 
 	public Anchor.Mode getMode() {
@@ -289,14 +298,6 @@ public class Camera {
 		return currentModeIndex;
 	}
 
-	public float getLastAnchorYaw() {
-		return lastAnchorYaw;
-	}
-
-	public float getLastAnchorPitch() {
-		return lastAnchorPitch;
-	}
-
 	public Vec3 getLastAnchorPosition() {
 		return lastAnchorPosition;
 	}
@@ -310,7 +311,7 @@ public class Camera {
 	}
 
 	public Vec3 getLastAnchorUp() {
-		return lastAnchorUp;
+		return lastAnchorUpVector;
 	}
 
 }

src/main/java/ru/windcorp/progressia/client/graphics/world/EntityAnchor.java

@@ -59,24 +59,32 @@ public class EntityAnchor implements Anchor {
 	}
 
 	@Override
-	public void getCameraPosition(Vec3 output) {
+	public Vec3 getCameraPosition(Vec3 output) {
+		if (output == null) output = new Vec3();
 		model.getViewPoint(output);
-		output.add(entity.getPosition());
+		output.add(model.getPosition());
+		return output;
 	}
 
 	@Override
-	public void getCameraVelocity(Vec3 output) {
+	public Vec3 getCameraVelocity(Vec3 output) {
+		if (output == null) output = new Vec3();
 		output.set(entity.getVelocity());
+		return output;
 	}
 
 	@Override
-	public float getCameraYaw() {
+	public Vec3 getLookingAt(Vec3 output) {
-		return entity.getYaw();
+		if (output == null) output = new Vec3();
+		model.getLookingAt(output);
+		return output;
 	}
-
+	
 	@Override
-	public float getCameraPitch() {
+	public Vec3 getUpVector(Vec3 output) {
-		return entity.getPitch();
+		if (output == null) output = new Vec3();
+		model.getUpVector(output);
+		return output;
 	}
 
 	@Override

src/main/java/ru/windcorp/progressia/client/graphics/world/LayerWorld.java

@@ -41,6 +41,8 @@ import ru.windcorp.progressia.common.Units;
 import ru.windcorp.progressia.common.collision.Collideable;
 import ru.windcorp.progressia.common.collision.colliders.Collider;
 import ru.windcorp.progressia.common.util.FloatMathUtil;
+import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.GravityModel;
 import ru.windcorp.progressia.common.world.entity.EntityData;
 import ru.windcorp.progressia.test.CollisionModelRenderer;
 import ru.windcorp.progressia.test.TestPlayerControls;
@@ -57,6 +59,8 @@ public class LayerWorld extends Layer {
 		super("World");
 		this.client = client;
 		this.inputBasedControls = new InputBasedControls(client);
+		
+		setCursorPolicy(CursorPolicy.FORBID);
 	}
 
 	@Override
@@ -72,6 +76,8 @@ public class LayerWorld extends Layer {
 
 	@Override
 	protected void doRender() {
+		client.getComms().processPackets();
+		
 		Camera camera = client.getCamera();
 		if (camera.hasAnchor()) {
 			renderWorld();
@@ -188,7 +194,7 @@ public class LayerWorld extends Layer {
 			);
 		}
 
-		return new StaticModel(b);
+		return b.build();
 	}
 
 	private static final float FRICTION_COEFF = Units.get("1e-5f kg/s");
@@ -197,16 +203,25 @@ public class LayerWorld extends Layer {
 		entity.getVelocity().mul((float) Math.exp(-FRICTION_COEFF / entity.getCollisionMass() * tickLength));
 	}
 
-	private static final float MC_g = Units.get("32  m/s^2");
-	private static final float IRL_g = Units.get("9.8 m/s^2");
-
 	private void tmp_applyGravity(EntityData entity, float tickLength) {
+		GravityModel gm = ClientState.getInstance().getWorld().getData().getGravityModel();
+		
+		Vec3 upVector = Vectors.grab3();
+		gm.getUp(entity.getPosition(), upVector);
+		entity.changeUpVector(upVector);
+		Vectors.release(upVector);
+		
 		if (ClientState.getInstance().getLocalPlayer().getEntity() == entity && tmp_testControls.isFlying()) {
 			return;
 		}
 
-		final float gravitationalAcceleration = tmp_testControls.useMinecraftGravity() ? MC_g : IRL_g;
+		Vec3 gravitationalAcceleration = Vectors.grab3();
-		entity.getVelocity().add(0, 0, -gravitationalAcceleration * tickLength);
+		gm.getGravity(entity.getPosition(), gravitationalAcceleration);
+		
+		gravitationalAcceleration.mul(tickLength);
+		entity.getVelocity().add(gravitationalAcceleration);
+		
+		Vectors.release(gravitationalAcceleration);
 	}
 
 	@Override

src/main/java/ru/windcorp/progressia/client/graphics/world/Selection.java

@@ -23,13 +23,13 @@ import glm.vec._3.Vec3;
 import glm.vec._3.i.Vec3i;
 import ru.windcorp.progressia.client.world.WorldRender;
 import ru.windcorp.progressia.common.world.BlockRay;
-import ru.windcorp.progressia.common.world.block.BlockFace;
 import ru.windcorp.progressia.common.world.entity.EntityData;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
 
 public class Selection {
 
 	private final Vec3i block = new Vec3i();
-	private BlockFace surface = null;
+	private AbsFace surface = null;
 	private final Vec2 pointOnSurface = new Vec2(0.5f, 0.5f);
 	private final Vec3 point = new Vec3();
 
@@ -38,10 +38,9 @@ public class Selection {
 	private BlockRay ray = new BlockRay();
 
 	public void update(WorldRender world, EntityData player) {
-		Vec3 direction = new Vec3();
 		Vec3 start = new Vec3();
-
+		Vec3 direction = player.getLookingAt();
-		player.getLookingAtVector(direction);
+		
 		world.getEntityRenderable(player).getViewPoint(start);
 		start.add(player.getPosition());
 
@@ -71,7 +70,7 @@ public class Selection {
 		return exists ? point : null;
 	}
 
-	public BlockFace getSurface() {
+	public AbsFace getSurface() {
 		return exists ? surface : null;
 	}
 

src/main/java/ru/windcorp/progressia/client/graphics/world/WorldRenderProgram.java

@@ -33,7 +33,7 @@ import glm.vec._4.Vec4;
 import ru.windcorp.progressia.client.graphics.backend.VertexBufferObject;
 import ru.windcorp.progressia.client.graphics.backend.shaders.attributes.*;
 import ru.windcorp.progressia.client.graphics.backend.shaders.uniforms.*;
-import ru.windcorp.progressia.client.graphics.model.Face;
+import ru.windcorp.progressia.client.graphics.model.ShapePart;
 import ru.windcorp.progressia.client.graphics.model.Shape;
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderProgram;
@@ -138,12 +138,12 @@ public class WorldRenderProgram extends ShapeRenderProgram {
 	public void preprocess(Shape shape) {
 		super.preprocess(shape);
 
-		for (Face face : shape.getFaces()) {
+		for (ShapePart face : shape.getParts()) {
 			computeNormals(face);
 		}
 	}
 
-	private void computeNormals(Face face) {
+	private void computeNormals(ShapePart face) {
 		Vec3 a = Vectors.grab3();
 		Vec3 b = Vectors.grab3();
 		Vec3 c = Vectors.grab3();
@@ -183,7 +183,7 @@ public class WorldRenderProgram extends ShapeRenderProgram {
 		normal.normalize();
 	}
 
-	private void loadVertexPosition(Face face, int index, Vec3 result) {
+	private void loadVertexPosition(ShapePart face, int index, Vec3 result) {
 		ByteBuffer vertices = face.getVertices();
 		int offset = vertices.position() + index * getBytesPerVertex();
 
@@ -194,7 +194,7 @@ public class WorldRenderProgram extends ShapeRenderProgram {
 		);
 	}
 
-	private void saveVertexNormal(Face face, int index, Vec3 normal) {
+	private void saveVertexNormal(ShapePart face, int index, Vec3 normal) {
 		ByteBuffer vertices = face.getVertices();
 		int offset = vertices.position() + index * getBytesPerVertex() + (3 * Float.BYTES +
 			4 * Float.BYTES +

src/main/java/ru/windcorp/progressia/client/world/ChunkRender.java

@@ -18,57 +18,52 @@
  
 package ru.windcorp.progressia.client.world;
 
-import java.util.Collection;
 import java.util.Collections;
-import java.util.List;
 import java.util.Map;
-import java.util.Objects;
 import java.util.WeakHashMap;
-import java.util.stream.Collectors;
 
-import glm.mat._4.Mat4;
-import glm.vec._3.Vec3;
 import glm.vec._3.i.Vec3i;
-import ru.windcorp.progressia.client.graphics.model.Model;
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
-import ru.windcorp.progressia.client.graphics.model.StaticModel;
-import ru.windcorp.progressia.client.graphics.model.Renderable;
-import ru.windcorp.progressia.client.graphics.model.StaticModel.Builder;
 import ru.windcorp.progressia.client.world.block.BlockRender;
-import ru.windcorp.progressia.client.world.block.BlockRenderNone;
 import ru.windcorp.progressia.client.world.block.BlockRenderRegistry;
-import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizer;
-import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizerSupplier;
-import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizers;
 import ru.windcorp.progressia.client.world.tile.TileRender;
+import ru.windcorp.progressia.client.world.tile.TileRenderReference;
 import ru.windcorp.progressia.client.world.tile.TileRenderRegistry;
 import ru.windcorp.progressia.client.world.tile.TileRenderStack;
-import ru.windcorp.progressia.common.world.ChunkData;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.TileDataReference;
-import ru.windcorp.progressia.common.world.generic.GenericChunk;
+import ru.windcorp.progressia.common.world.TileDataStack;
-import ru.windcorp.progressia.common.world.tile.TileData;
+import ru.windcorp.progressia.common.world.generic.ChunkGenericRO;
-import ru.windcorp.progressia.common.world.tile.TileDataStack;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
+import ru.windcorp.progressia.common.world.rels.BlockFace;
+import ru.windcorp.progressia.common.world.rels.RelFace;
 
 public class ChunkRender
-	implements GenericChunk<ChunkRender, BlockRender, TileRender, TileRenderStack> {
+	implements ChunkGenericRO<BlockRender, TileRender, TileRenderStack, TileRenderReference, ChunkRender> {
 
 	private final WorldRender world;
-	private final ChunkData data;
+	private final DefaultChunkData data;
 
-	private Model model = null;
+	private final ChunkRenderModel model;
 
 	private final Map<TileDataStack, TileRenderStackImpl> tileRenderLists = Collections
 		.synchronizedMap(new WeakHashMap<>());
 
-	public ChunkRender(WorldRender world, ChunkData data) {
+	public ChunkRender(WorldRender world, DefaultChunkData data) {
 		this.world = world;
 		this.data = data;
+		this.model = new ChunkRenderModel(this);
 	}
 
 	@Override
 	public Vec3i getPosition() {
 		return getData().getPosition();
 	}
+	
+	@Override
+	public AbsFace getUp() {
+		return getData().getUp();
+	}
 
 	@Override
 	public BlockRender getBlock(Vec3i posInChunk) {
@@ -98,177 +93,45 @@ public class ChunkRender
 		return world;
 	}
 
-	public ChunkData getData() {
+	public DefaultChunkData getData() {
 		return data;
 	}
 
-	public synchronized void markForUpdate() {
+	public void markForUpdate() {
 		getWorld().markChunkForUpdate(getPosition());
 	}
 
 	public synchronized void render(ShapeRenderHelper renderer) {
-		if (model == null) {
-			return;
-		}
-
-		renderer.pushTransform().translate(
-			data.getX() * ChunkData.BLOCKS_PER_CHUNK,
-			data.getY() * ChunkData.BLOCKS_PER_CHUNK,
-			data.getZ() * ChunkData.BLOCKS_PER_CHUNK
-		);
-
 		model.render(renderer);
-
-		renderer.popTransform();
 	}
 
 	public synchronized void update() {
-		Collection<ChunkRenderOptimizer> optimizers = ChunkRenderOptimizers.getAllSuppliers().stream()
+		model.update();
-			.map(ChunkRenderOptimizerSupplier::createOptimizer)
-			.collect(Collectors.toList());
-
-		optimizers.forEach(bro -> bro.startRender(this));
-
-		StaticModel.Builder builder = StaticModel.builder();
-
-		Vec3i cursor = new Vec3i();
-		for (int x = 0; x < ChunkData.BLOCKS_PER_CHUNK; ++x) {
-			for (int y = 0; y < ChunkData.BLOCKS_PER_CHUNK; ++y) {
-				for (int z = 0; z < ChunkData.BLOCKS_PER_CHUNK; ++z) {
-					cursor.set(x, y, z);
-
-					buildBlock(cursor, optimizers, builder);
-					buildBlockTiles(cursor, optimizers, builder);
-				}
-			}
-		}
-
-		optimizers.stream()
-			.map(ChunkRenderOptimizer::endRender)
-			.filter(Objects::nonNull)
-			.forEach(builder::addPart);
-
-		model = new StaticModel(builder);
-	}
-
-	private void buildBlock(
-		Vec3i cursor,
-		Collection<ChunkRenderOptimizer> optimizers,
-		Builder builder
-	) {
-		BlockRender block = getBlock(cursor);
-
-		if (block instanceof BlockRenderNone) {
-			return;
-		}
-
-		forwardBlockToOptimizers(block, cursor, optimizers);
-
-		if (!block.needsOwnRenderable()) {
-			return;
-		}
-
-		addBlockRenderable(block, cursor, builder);
-	}
-
-	private void forwardBlockToOptimizers(
-		BlockRender block,
-		Vec3i cursor,
-		Collection<ChunkRenderOptimizer> optimizers
-	) {
-		optimizers.forEach(cro -> cro.processBlock(block, cursor));
-	}
-
-	private void addBlockRenderable(
-		BlockRender block,
-		Vec3i cursor,
-		Builder builder
-	) {
-		Renderable renderable = block.createRenderable();
-
-		if (renderable == null) {
-			renderable = block::render;
-		}
-
-		builder.addPart(
-			renderable,
-			new Mat4().identity().translate(cursor.x, cursor.y, cursor.z)
-		);
-	}
-
-	private void buildBlockTiles(
-		Vec3i cursor,
-		Collection<ChunkRenderOptimizer> optimizers,
-		Builder builder
-	) {
-		for (BlockFace face : BlockFace.getFaces()) {
-			buildFaceTiles(cursor, face, optimizers, builder);
-		}
-	}
-
-	private void buildFaceTiles(
-		Vec3i cursor,
-		BlockFace face,
-		Collection<ChunkRenderOptimizer> optimizers,
-		Builder builder
-	) {
-		List<TileData> tiles = getData().getTilesOrNull(cursor, face);
-
-		if (tiles == null) {
-			return;
-		}
-
-		for (int layer = 0; layer < tiles.size(); ++layer) {
-
-			if (tiles.get(layer) == null) {
-				System.out.println(tiles.get(layer).getId());
-			}
-
-			buildTile(
-				cursor,
-				face,
-				TileRenderRegistry.getInstance().get(
-					tiles.get(layer).getId()
-				),
-				layer,
-				optimizers,
-				builder
-			);
-		}
-	}
-
-	private void buildTile(
-		Vec3i cursor,
-		BlockFace face,
-		TileRender tile,
-		int layer,
-		Collection<ChunkRenderOptimizer> optimizers,
-		Builder builder
-	) {
-		// TODO implement
-
-		Vec3 pos = new Vec3(cursor.x, cursor.y, cursor.z);
-
-		optimizers.forEach(cro -> cro.processTile(tile, cursor, face));
-
-		if (!tile.needsOwnRenderable())
-			return;
-
-		Vec3 offset = new Vec3(
-			face.getVector().x,
-			face.getVector().y,
-			face.getVector().z
-		);
-
-		pos.add(offset.mul(1f / 64));
-
-		builder.addPart(
-			tile.createRenderable(face),
-			new Mat4().identity().translate(pos)
-		);
 	}
 
 	private class TileRenderStackImpl extends TileRenderStack {
+		private class TileRenderReferenceImpl implements TileRenderReference {
+			private final TileDataReference parent;
+
+			public TileRenderReferenceImpl(TileDataReference parent) {
+				this.parent = parent;
+			}
+
+			@Override
+			public TileRender get() {
+				return TileRenderRegistry.getInstance().get(parent.get().getId());
+			}
+
+			@Override
+			public int getIndex() {
+				return parent.getIndex();
+			}
+
+			@Override
+			public TileRenderStack getStack() {
+				return TileRenderStackImpl.this;
+			}
+		}
 
 		private final TileDataStack parent;
 
@@ -287,9 +150,24 @@ public class ChunkRender
 		}
 
 		@Override
-		public BlockFace getFace() {
+		public RelFace getFace() {
 			return parent.getFace();
 		}
+		
+		@Override
+		public TileRenderReference getReference(int index) {
+			return new TileRenderReferenceImpl(parent.getReference(index));
+		}
+
+		@Override
+		public int getIndexByTag(int tag) {
+			return parent.getIndexByTag(tag);
+		}
+
+		@Override
+		public int getTagByIndex(int index) {
+			return parent.getTagByIndex(index);
+		}
 
 		@Override
 		public TileRender get(int index) {

src/main/java/ru/windcorp/progressia/client/world/ChunkRenderModel.java

@@ -0,0 +1,167 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.client.world;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Set;
+
+import glm.mat._4.Mat4;
+import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.client.graphics.model.Model;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
+import ru.windcorp.progressia.client.graphics.model.StaticModel;
+import ru.windcorp.progressia.client.graphics.model.StaticModel.Builder;
+import ru.windcorp.progressia.client.world.block.BlockRender;
+import ru.windcorp.progressia.client.world.block.BlockRenderNone;
+import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizer;
+import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizerRegistry;
+import ru.windcorp.progressia.client.world.tile.TileRender;
+import ru.windcorp.progressia.client.world.tile.TileRenderNone;
+import ru.windcorp.progressia.client.world.tile.TileRenderStack;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
+import ru.windcorp.progressia.common.world.generic.GenericChunks;
+import ru.windcorp.progressia.common.world.rels.AxisRotations;
+import ru.windcorp.progressia.common.world.rels.RelFace;
+
+public class ChunkRenderModel implements Renderable {
+	
+	private final ChunkRender chunk;
+	
+	private final Collection<ChunkRenderOptimizer> optimizers = new ArrayList<>();
+	private Model model = null;
+
+	public ChunkRenderModel(ChunkRender chunk) {
+		this.chunk = chunk;
+	}
+
+	@Override
+	public void render(ShapeRenderHelper renderer) {
+		if (model == null) return;
+		
+		float offset = DefaultChunkData.BLOCKS_PER_CHUNK / 2 - 0.5f;
+		
+		renderer.pushTransform().translate(
+			chunk.getX() * DefaultChunkData.BLOCKS_PER_CHUNK,
+			chunk.getY() * DefaultChunkData.BLOCKS_PER_CHUNK,
+			chunk.getZ() * DefaultChunkData.BLOCKS_PER_CHUNK
+		).translate(offset, offset, offset)
+		.mul(AxisRotations.getResolutionMatrix4(chunk.getUp()))
+		.translate(-offset, -offset, -offset);
+
+		model.render(renderer);
+
+		renderer.popTransform();
+	}
+	
+	public void update() {
+		setupCROs();
+		
+		StaticModel.Builder sink = StaticModel.builder();
+		
+		optimizers.forEach(ChunkRenderOptimizer::startRender);
+		
+		GenericChunks.forEachBiC(relBlockInChunk -> {
+			processBlockAndTiles(relBlockInChunk, sink);
+		});
+		
+		for (ChunkRenderOptimizer optimizer : optimizers) {
+			Renderable renderable = optimizer.endRender();
+			if (renderable != null) {
+				sink.addPart(renderable);
+			}
+		}
+		
+		this.model = sink.build();
+		this.optimizers.clear();
+	}
+
+	private void setupCROs() {
+		Set<String> ids = ChunkRenderOptimizerRegistry.getInstance().keySet();
+		
+		for (String id : ids) {
+			ChunkRenderOptimizer optimizer = ChunkRenderOptimizerRegistry.getInstance().create(id);
+			optimizer.setup(chunk);
+			this.optimizers.add(optimizer);
+		}
+	}
+
+	private void processBlockAndTiles(Vec3i relBlockInChunk, Builder sink) {
+		processBlock(relBlockInChunk, sink);
+		
+		for (RelFace face : RelFace.getFaces()) {
+			processTileStack(relBlockInChunk, face, sink);
+		}
+	}
+
+	private void processBlock(Vec3i relBlockInChunk, Builder sink) {
+		BlockRender block = chunk.getBlockRel(relBlockInChunk);
+		
+		if (block instanceof BlockRenderNone) {
+			return;
+		}
+		
+		if (block.needsOwnRenderable()) {
+			sink.addPart(
+				block.createRenderable(chunk.getData(), relBlockInChunk), 
+				new Mat4().identity().translate(relBlockInChunk.x, relBlockInChunk.y, relBlockInChunk.z)
+			);
+		}
+		
+		processBlockWithCROs(block, relBlockInChunk);
+	}
+
+	private void processBlockWithCROs(BlockRender block, Vec3i relBlockInChunk) {
+		for (ChunkRenderOptimizer optimizer : optimizers) {
+			optimizer.addBlock(block, relBlockInChunk);
+		}
+	}
+
+	private void processTileStack(Vec3i relBlockInChunk, RelFace face, Builder sink) {
+		TileRenderStack trs = chunk.getTilesOrNullRel(relBlockInChunk, face);
+		
+		if (trs == null || trs.isEmpty()) {
+			return;
+		}
+		
+		trs.forEach(tile -> processTile(tile, relBlockInChunk, face, sink));
+	}
+
+	private void processTile(TileRender tile, Vec3i relBlockInChunk, RelFace face, Builder sink) {	
+		if (tile instanceof TileRenderNone) {
+			return;
+		}
+		
+		if (tile.needsOwnRenderable()) {
+			sink.addPart(
+				tile.createRenderable(chunk.getData(), relBlockInChunk, face), 
+				new Mat4().identity().translate(relBlockInChunk.x, relBlockInChunk.y, relBlockInChunk.z)
+			);
+		}
+		
+		processTileWithCROs(tile, relBlockInChunk, face);
+	}
+
+	private void processTileWithCROs(TileRender tile, Vec3i relBlockInChunk, RelFace face) {
+		for (ChunkRenderOptimizer optimizer : optimizers) {
+			optimizer.addTile(tile, relBlockInChunk, face);
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/ChunkUpdateListener.java

@@ -18,8 +18,15 @@
  
 package ru.windcorp.progressia.client.world;
 
-import ru.windcorp.progressia.common.world.ChunkData;
+import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.common.util.VectorUtil;
+import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
 import ru.windcorp.progressia.common.world.ChunkDataListener;
+import ru.windcorp.progressia.common.world.block.BlockData;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
+import ru.windcorp.progressia.common.world.rels.RelFace;
+import ru.windcorp.progressia.common.world.tile.TileData;
 
 class ChunkUpdateListener implements ChunkDataListener {
 
@@ -30,8 +37,64 @@ class ChunkUpdateListener implements ChunkDataListener {
 	}
 
 	@Override
-	public void onChunkChanged(ChunkData chunk) {
+	public void onChunkChanged(DefaultChunkData chunk) {
 		world.getChunk(chunk).markForUpdate();
 	}
+	
+	@Override
+	public void onChunkLoaded(DefaultChunkData chunk) {
+		Vec3i cursor = new Vec3i();
+		for (AbsFace face : AbsFace.getFaces()) {
+			cursor.set(chunk.getX(), chunk.getY(), chunk.getZ());
+			cursor.add(face.getVector());
+			world.markChunkForUpdate(cursor);
+		}
+	}
+	
+	@Override
+	public void onChunkBlockChanged(DefaultChunkData chunk, Vec3i blockInChunk, BlockData previous, BlockData current) {
+		onLocationChanged(chunk, blockInChunk);
+	}
+	
+	@Override
+	public void onChunkTilesChanged(
+		DefaultChunkData chunk,
+		Vec3i blockInChunk,
+		RelFace face,
+		TileData tile,
+		boolean wasAdded
+	) {
+		onLocationChanged(chunk, blockInChunk);
+	}
+
+	private void onLocationChanged(DefaultChunkData chunk, Vec3i blockInChunk) {
+		Vec3i chunkPos = Vectors.grab3i().set(chunk.getX(), chunk.getY(), chunk.getZ());
+		
+		checkCoordinate(blockInChunk, chunkPos, VectorUtil.Axis.X);
+		checkCoordinate(blockInChunk, chunkPos, VectorUtil.Axis.Y);
+		checkCoordinate(blockInChunk, chunkPos, VectorUtil.Axis.Z);
+		
+		Vectors.release(chunkPos);
+	}
+
+	private void checkCoordinate(Vec3i blockInChunk, Vec3i chunkPos, VectorUtil.Axis axis) {
+		int block = VectorUtil.get(blockInChunk, axis);
+		int diff = 0;
+		
+		if (block == 0) {
+			diff = -1;
+		} else if (block == DefaultChunkData.BLOCKS_PER_CHUNK - 1) {
+			diff = +1;
+		} else {
+			return;
+		}
+		
+		int previousChunkPos = VectorUtil.get(chunkPos, axis);
+		VectorUtil.set(chunkPos, axis, previousChunkPos + diff);
+
+		world.markChunkForUpdate(chunkPos);
+		
+		VectorUtil.set(chunkPos, axis, previousChunkPos);
+	}
 
 }

src/main/java/ru/windcorp/progressia/client/world/WorldRender.java

@@ -34,57 +34,58 @@ import ru.windcorp.progressia.client.world.block.BlockRender;
 import ru.windcorp.progressia.client.world.entity.EntityRenderRegistry;
 import ru.windcorp.progressia.client.world.entity.EntityRenderable;
 import ru.windcorp.progressia.client.world.tile.TileRender;
+import ru.windcorp.progressia.client.world.tile.TileRenderReference;
 import ru.windcorp.progressia.client.world.tile.TileRenderStack;
 import ru.windcorp.progressia.common.util.VectorUtil;
 import ru.windcorp.progressia.common.util.Vectors;
-import ru.windcorp.progressia.common.world.ChunkData;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
 import ru.windcorp.progressia.common.world.ChunkDataListeners;
-import ru.windcorp.progressia.common.world.WorldData;
+import ru.windcorp.progressia.common.world.DefaultWorldData;
 import ru.windcorp.progressia.common.world.WorldDataListener;
 import ru.windcorp.progressia.common.world.entity.EntityData;
 import ru.windcorp.progressia.common.world.generic.ChunkSet;
 import ru.windcorp.progressia.common.world.generic.ChunkSets;
-import ru.windcorp.progressia.common.world.generic.GenericWorld;
+import ru.windcorp.progressia.common.world.generic.WorldGenericRO;
 
 public class WorldRender
-	implements GenericWorld<BlockRender, TileRender, TileRenderStack, ChunkRender, EntityRenderable> {
+	implements WorldGenericRO<BlockRender, TileRender, TileRenderStack, TileRenderReference, ChunkRender, EntityRenderable> {
 
-	private final WorldData data;
+	private final DefaultWorldData data;
 	private final Client client;
 
-	private final Map<ChunkData, ChunkRender> chunks = Collections.synchronizedMap(new HashMap<>());
+	private final Map<DefaultChunkData, ChunkRender> chunks = Collections.synchronizedMap(new HashMap<>());
 	private final Map<EntityData, EntityRenderable> entityModels = Collections.synchronizedMap(new WeakHashMap<>());
 
 	private final ChunkSet chunksToUpdate = ChunkSets.newSyncHashSet();
 
-	public WorldRender(WorldData data, Client client) {
+	public WorldRender(DefaultWorldData data, Client client) {
 		this.data = data;
 		this.client = client;
 
 		data.addListener(ChunkDataListeners.createAdder(new ChunkUpdateListener(this)));
 		data.addListener(new WorldDataListener() {
 			@Override
-			public void onChunkLoaded(WorldData world, ChunkData chunk) {
+			public void onChunkLoaded(DefaultWorldData world, DefaultChunkData chunk) {
 				addChunk(chunk);
 			}
 
 			@Override
-			public void beforeChunkUnloaded(WorldData world, ChunkData chunk) {
+			public void beforeChunkUnloaded(DefaultWorldData world, DefaultChunkData chunk) {
 				removeChunk(chunk);
 			}
 		});
 	}
 
-	protected void addChunk(ChunkData chunk) {
+	protected void addChunk(DefaultChunkData chunk) {
 		chunks.put(chunk, new ChunkRender(WorldRender.this, chunk));
 		markChunkForUpdate(chunk.getPosition());
 	}
 
-	protected void removeChunk(ChunkData chunk) {
+	protected void removeChunk(DefaultChunkData chunk) {
 		chunks.remove(chunk);
 	}
 
-	public WorldData getData() {
+	public DefaultWorldData getData() {
 		return data;
 	}
 
@@ -92,7 +93,7 @@ public class WorldRender
 		return client;
 	}
 
-	public ChunkRender getChunk(ChunkData chunkData) {
+	public ChunkRender getChunk(DefaultChunkData chunkData) {
 		return chunks.get(chunkData);
 	}
 
@@ -110,6 +111,13 @@ public class WorldRender
 	public Collection<EntityRenderable> getEntities() {
 		return entityModels.values();
 	}
+	
+	@Override
+	public EntityRenderable getEntity(long entityId) {
+		EntityData entityData = getData().getEntity(entityId);
+		if (entityData == null) return null;
+		return getEntityRenderable(entityData);
+	}
 
 	public void render(ShapeRenderHelper renderer) {
 		updateChunks();

src/main/java/ru/windcorp/progressia/client/world/block/BlockRender.java

@@ -18,24 +18,19 @@
  
 package ru.windcorp.progressia.client.world.block;
 
-import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
 import ru.windcorp.progressia.common.util.namespaces.Namespaced;
-import ru.windcorp.progressia.common.world.generic.GenericBlock;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
+import ru.windcorp.progressia.common.world.generic.BlockGeneric;
+import glm.vec._3.i.Vec3i;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
 
-public abstract class BlockRender extends Namespaced implements GenericBlock {
+public abstract class BlockRender extends Namespaced implements BlockGeneric {
 
 	public BlockRender(String id) {
 		super(id);
 	}
 
-	public void render(ShapeRenderHelper renderer) {
+	public Renderable createRenderable(DefaultChunkData chunk, Vec3i relBlockInChunk) {
-		throw new UnsupportedOperationException(
-			"BlockRender.render() not implemented in " + this
-		);
-	}
-
-	public Renderable createRenderable() {
 		return null;
 	}
 

src/main/java/ru/windcorp/progressia/client/world/block/BlockRenderNone.java

@@ -18,8 +18,10 @@
  
 package ru.windcorp.progressia.client.world.block;
 
+import glm.vec._3.i.Vec3i;
 import ru.windcorp.progressia.client.graphics.model.EmptyModel;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
 
 public class BlockRenderNone extends BlockRender {
 
@@ -28,7 +30,7 @@ public class BlockRenderNone extends BlockRender {
 	}
 
 	@Override
-	public Renderable createRenderable() {
+	public Renderable createRenderable(DefaultChunkData chunk, Vec3i blockInChunk) {
 		return EmptyModel.getInstance();
 	}
 

src/main/java/ru/windcorp/progressia/client/world/block/BlockRenderOpaqueCube.java

@@ -19,7 +19,7 @@
 package ru.windcorp.progressia.client.world.block;
 
 import ru.windcorp.progressia.client.graphics.texture.Texture;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.RelFace;
 
 public class BlockRenderOpaqueCube extends BlockRenderTexturedCube {
 
@@ -29,8 +29,8 @@ public class BlockRenderOpaqueCube extends BlockRenderTexturedCube {
 		Texture bottomTexture,
 		Texture northTexture,
 		Texture southTexture,
-		Texture eastTexture,
+		Texture westTexture,
-		Texture westTexture
+		Texture eastTexture
 	) {
 		super(
 			id,
@@ -38,8 +38,8 @@ public class BlockRenderOpaqueCube extends BlockRenderTexturedCube {
 			bottomTexture,
 			northTexture,
 			southTexture,
-			eastTexture,
+			westTexture,
-			westTexture
+			eastTexture
 		);
 	}
 
@@ -54,9 +54,21 @@ public class BlockRenderOpaqueCube extends BlockRenderTexturedCube {
 			texture
 		);
 	}
+	
+	public BlockRenderOpaqueCube(String id, Texture topTexture, Texture bottomTexture, Texture sideTexture) {
+		this(
+			id,
+			topTexture,
+			bottomTexture,
+			sideTexture,
+			sideTexture,
+			sideTexture,
+			sideTexture
+		);
+	}
 
 	@Override
-	public boolean isOpaque(BlockFace face) {
+	public boolean isOpaque(RelFace face) {
 		return true;
 	}
 
@@ -65,9 +77,4 @@ public class BlockRenderOpaqueCube extends BlockRenderTexturedCube {
 		return true;
 	}
 
-	@Override
-	public boolean needsOwnRenderable() {
-		return false;
-	}
-
 }

src/main/java/ru/windcorp/progressia/client/world/block/BlockRenderTexturedCube.java

@@ -18,23 +18,33 @@
  
 package ru.windcorp.progressia.client.world.block;
 
-import static ru.windcorp.progressia.common.world.block.BlockFace.*;
+import static ru.windcorp.progressia.common.world.rels.AbsFace.*;
 
-import java.util.HashMap;
 import java.util.Map;
+import java.util.function.Consumer;
 
-import ru.windcorp.progressia.client.graphics.model.Shapes;
+import glm.vec._3.Vec3;
+import glm.vec._3.i.Vec3i;
+import glm.vec._4.Vec4;
+import ru.windcorp.progressia.client.graphics.Colors;
+import ru.windcorp.progressia.client.graphics.backend.Usage;
+import ru.windcorp.progressia.client.graphics.model.ShapePart;
+import ru.windcorp.progressia.client.graphics.model.ShapeParts;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.Shape;
 import ru.windcorp.progressia.client.graphics.texture.Texture;
 import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
-import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizerCube.OpaqueCube;
+import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizerSurface.BlockOptimizedSurface;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
+import ru.windcorp.progressia.common.world.rels.RelFace;
 
 public abstract class BlockRenderTexturedCube
 	extends BlockRender
-	implements OpaqueCube {
+	implements BlockOptimizedSurface {
 
-	private final Map<BlockFace, Texture> textures = new HashMap<>();
+	private final Map<RelFace, Texture> textures;
 
 	public BlockRenderTexturedCube(
 		String id,
@@ -42,35 +52,68 @@ public abstract class BlockRenderTexturedCube
 		Texture bottomTexture,
 		Texture northTexture,
 		Texture southTexture,
-		Texture eastTexture,
+		Texture westTexture,
-		Texture westTexture
+		Texture eastTexture
 	) {
 		super(id);
+		this.textures = RelFace.mapToFaces(topTexture, bottomTexture, northTexture, southTexture, westTexture, eastTexture);
+	}
 
-		textures.put(TOP, topTexture);
+	public Texture getTexture(RelFace blockFace) {
-		textures.put(BOTTOM, bottomTexture);
+		return textures.get(blockFace);
-		textures.put(NORTH, northTexture);
+	}
-		textures.put(SOUTH, southTexture);
+	
-		textures.put(EAST, eastTexture);
+	public Vec4 getColorMultiplier(RelFace blockFace) {
-		textures.put(WEST, westTexture);
+		return Colors.WHITE;
 	}
 
 	@Override
-	public Texture getTexture(BlockFace face) {
+	public final void getShapeParts(
-		return textures.get(face);
+		DefaultChunkData chunk, Vec3i blockInChunk, RelFace blockFace,
+		boolean inner,
+		Consumer<ShapePart> output,
+		Vec3 offset
+	) {
+		output.accept(createFace(chunk, blockInChunk, blockFace, inner, offset));
 	}
-
+	
-	@Override
+	private ShapePart createFace(
-	public Renderable createRenderable() {
+		DefaultChunkData chunk, Vec3i blockInChunk, RelFace blockFace,
-		return new Shapes.PppBuilder(
+		boolean inner,
+		Vec3 offset
+	) {
+		return ShapeParts.createBlockFace(
 			WorldRenderProgram.getDefault(),
-			getTexture(TOP),
+			getTexture(blockFace),
-			getTexture(BOTTOM),
+			getColorMultiplier(blockFace),
-			getTexture(NORTH),
+			offset,
-			getTexture(SOUTH),
+			blockFace.resolve(AbsFace.POS_Z),
-			getTexture(EAST),
+			inner
-			getTexture(WEST)
+		);
-		).create();
+	}
+
+	@Override
+	public Renderable createRenderable(DefaultChunkData chunk, Vec3i blockInChunk) {
+		boolean opaque = isBlockOpaque();
+		
+		ShapePart[] faces = new ShapePart[BLOCK_FACE_COUNT + (opaque ? BLOCK_FACE_COUNT : 0)];
+		
+		for (int i = 0; i < BLOCK_FACE_COUNT; ++i) {
+			faces[i] = createFace(chunk, blockInChunk, RelFace.getFaces().get(i), false, Vectors.ZERO_3);
+		}
+		
+		if (!opaque) {
+			for (int i = 0; i < BLOCK_FACE_COUNT; ++i) {
+				faces[i + BLOCK_FACE_COUNT] = createFace(chunk, blockInChunk, RelFace.getFaces().get(i), true, Vectors.ZERO_3);
+			}
+		}
+		
+		return new Shape(Usage.STATIC, WorldRenderProgram.getDefault(), faces);
+	}
+
+	@Override
+	public boolean needsOwnRenderable() {
+		return false;
 	}
 
 }

src/main/java/ru/windcorp/progressia/client/world/block/BlockRenderTransparentCube.java

@@ -19,7 +19,7 @@
 package ru.windcorp.progressia.client.world.block;
 
 import ru.windcorp.progressia.client.graphics.texture.Texture;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.RelFace;
 
 public class BlockRenderTransparentCube extends BlockRenderTexturedCube {
 
@@ -29,8 +29,8 @@ public class BlockRenderTransparentCube extends BlockRenderTexturedCube {
 		Texture bottomTexture,
 		Texture northTexture,
 		Texture southTexture,
-		Texture eastTexture,
+		Texture westTexture,
-		Texture westTexture
+		Texture eastTexture
 	) {
 		super(
 			id,
@@ -38,8 +38,8 @@ public class BlockRenderTransparentCube extends BlockRenderTexturedCube {
 			bottomTexture,
 			northTexture,
 			southTexture,
-			eastTexture,
+			westTexture,
-			westTexture
+			eastTexture
 		);
 	}
 
@@ -54,9 +54,21 @@ public class BlockRenderTransparentCube extends BlockRenderTexturedCube {
 			texture
 		);
 	}
+	
+	public BlockRenderTransparentCube(String id, Texture topTexture, Texture bottomTexture, Texture sideTexture) {
+		this(
+			id,
+			topTexture,
+			bottomTexture,
+			sideTexture,
+			sideTexture,
+			sideTexture,
+			sideTexture
+		);
+	}
 
 	@Override
-	public boolean isOpaque(BlockFace face) {
+	public boolean isOpaque(RelFace face) {
 		return false;
 	}
 
@@ -65,9 +77,4 @@ public class BlockRenderTransparentCube extends BlockRenderTexturedCube {
 		return false;
 	}
 
-	@Override
-	public boolean needsOwnRenderable() {
-		return false;
-	}
-
 }

src/main/java/ru/windcorp/progressia/client/world/cro/ChunkRenderOptimizer.java

@@ -15,31 +15,123 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+
 package ru.windcorp.progressia.client.world.cro;
 
 import glm.vec._3.i.Vec3i;
-import ru.windcorp.progressia.client.graphics.model.Shape;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
 import ru.windcorp.progressia.client.world.ChunkRender;
 import ru.windcorp.progressia.client.world.block.BlockRender;
 import ru.windcorp.progressia.client.world.tile.TileRender;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
+import ru.windcorp.progressia.common.world.rels.RelFace;
 
-public abstract class ChunkRenderOptimizer {
+/**
+ * Chunk render optimizer (CRO) is an object that produces optimized models for
+ * chunks. CROs are sequentially given information about the blocks and tiles of
+ * a particular chunk, after which they are expected to produce a set of
+ * {@link Renderable}s. As the name suggests, CROs are primarily expected to
+ * output models that are optimized compared to models of individual blocks and
+ * tiles. An example of a CRO is {@link ChunkRenderOptimizerSurface}: it removes
+ * block surfaces and tiles that it knows cannot be seen, thus significantly
+ * reducing total polygon count.
+ * <p>
+ * As with everything related to rendering chunks, CROs are interacted with
+ * using the relative local chunk coordinate system. In this coordinate system,
+ * the coordinates are the chunk coordinates relativized using the chunks's up
+ * direction. In simpler terms, coordinates are {@code [0; BLOCKS_PER_CHUNK)}
+ * and Z is always up.
+ * <h3>CRO lifecycle</h3>
+ * A CRO instance is created by {@link ChunkRenderOptimizerRegistry}. It may
+ * then be used to work on multiple chunks sequentially. Each chunk is processed
+ * in the following way:
+ * <ol>
+ * <li>{@link #setup(ChunkRender)} is invoked to provide the {@link ChunkRender}
+ * instance.</li>
+ * <li>{@link #startRender()} is invoked. The CRO must reset its state.</li>
+ * <li>{@link #addBlock(BlockRender, Vec3i)} and
+ * {@link #addTile(TileRender, Vec3i, RelFace)} are invoked for each block and
+ * tile that this CRO should optimize. {@code addTile} specifies tiles in order
+ * of ascension within a tile stack.</li>
+ * <li>{@link #endRender()} is invoked. The CRO may perform any pending
+ * calculations. The result of the optimization is returned.</li>
+ * </ol>
+ * <p>
+ * Each CRO instance is accessed by a single thread.
+ */
+public abstract class ChunkRenderOptimizer extends Namespaced {
 
-	public abstract void startRender(ChunkRender chunk);
+	/**
+	 * The chunk that this CRO is currently working on.
+	 */
+	protected ChunkRender chunk = null;
 
-	public abstract void processBlock(
+	/**
-		BlockRender block,
+	 * Creates a new CRO instance with the specified ID.
-		Vec3i posInChunk
+	 * 
-	);
+	 * @param id the ID of this CRO
+	 */
+	public ChunkRenderOptimizer(String id) {
+		super(id);
+	}
 
-	public abstract void processTile(
+	/**
-		TileRender tile,
+	 * This method is invoked before a new chunk processing cycle begins to
-		Vec3i posInChunk,
+	 * specify the chunk. When overriding, {@code super.setup(chunk)} must be
-		BlockFace face
+	 * invoked.
-	);
+	 * 
+	 * @param chunk the chunk that will be processed next
+	 */
+	public void setup(ChunkRender chunk) {
+		this.chunk = chunk;
+	}
 
-	public abstract Shape endRender();
+	/**
+	 * @return the chunk that this CRO is currently working on
+	 */
+	public ChunkRender getChunk() {
+		return chunk;
+	}
+
+	/**
+	 * Resets this CRO to a state in which a new chunk may be processed.
+	 */
+	public abstract void startRender();
+
+	/**
+	 * Requests that this CRO processes the provided block. This method may only
+	 * be invoked between {@link #startRender()} and {@link #endRender()}. This
+	 * method is only invoked once per block. This method is not necessarily
+	 * invoked for each block.
+	 * 
+	 * @param block           a {@link BlockRender} instance describing the
+	 *                        block.
+	 *                        It corresponds to
+	 *                        {@code getChunk().getBlock(blockInChunk)}.
+	 * @param relBlockInChunk the relative position of the block
+	 */
+	public abstract void addBlock(BlockRender block, Vec3i relBlockInChunk);
+
+	/**
+	 * Requests that this CRO processes the provided tile. This method may only
+	 * be invoked between {@link #startRender()} and {@link #endRender()}. This
+	 * method is only invoked once per tile. This method is not necessarily
+	 * invoked for each tile. When multiple tiles in a tile stack are requested,
+	 * this method is invoked for lower tiles first.
+	 * 
+	 * @param tile            a {@link BlockRender} instance describing the tile
+	 * @param relBlockInChunk the relative position of the block that the tile
+	 *                        belongs to
+	 * @param blockFace       the face that the tile belongs to
+	 */
+	public abstract void addTile(TileRender tile, Vec3i relBlockInChunk, RelFace blockFace);
+
+	/**
+	 * Requests that the CRO assembles and outputs its model. This method may
+	 * only be invoked after {@link #startRender()}.
+	 * 
+	 * @return the assembled {@link Renderable}.
+	 */
+	public abstract Renderable endRender();
 
 }

src/main/java/ru/windcorp/progressia/client/world/cro/ChunkRenderOptimizerCube.java

@@ -1,283 +0,0 @@
-/*
- * Progressia
- * Copyright (C)  2020-2021  Wind Corporation and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
- 
-package ru.windcorp.progressia.client.world.cro;
-
-import static ru.windcorp.progressia.common.world.ChunkData.BLOCKS_PER_CHUNK;
-import static ru.windcorp.progressia.common.world.block.BlockFace.BLOCK_FACE_COUNT;
-import static ru.windcorp.progressia.common.world.generic.GenericTileStack.TILES_PER_FACE;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.function.Consumer;
-
-import glm.vec._3.Vec3;
-import glm.vec._3.i.Vec3i;
-import ru.windcorp.progressia.client.graphics.Colors;
-import ru.windcorp.progressia.client.graphics.backend.Usage;
-import ru.windcorp.progressia.client.graphics.model.Face;
-import ru.windcorp.progressia.client.graphics.model.Faces;
-import ru.windcorp.progressia.client.graphics.model.Shape;
-import ru.windcorp.progressia.client.graphics.texture.Texture;
-import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
-import ru.windcorp.progressia.client.world.ChunkRender;
-import ru.windcorp.progressia.client.world.block.BlockRender;
-import ru.windcorp.progressia.client.world.tile.TileRender;
-import ru.windcorp.progressia.common.world.block.BlockFace;
-
-public class ChunkRenderOptimizerCube extends ChunkRenderOptimizer {
-
-	public static interface OpaqueCube {
-		public Texture getTexture(BlockFace face);
-
-		public boolean isOpaque(BlockFace face);
-
-		public boolean isBlockOpaque();
-	}
-
-	public static interface OpaqueSurface {
-		public Texture getTexture(BlockFace face);
-
-		public boolean isOpaque(BlockFace face);
-	}
-
-	private static class BlockInfo {
-		OpaqueCube block;
-		final FaceInfo[] faces = new FaceInfo[BLOCK_FACE_COUNT];
-
-		{
-			for (int i = 0; i < faces.length; ++i) {
-				faces[i] = new FaceInfo();
-			}
-		}
-	}
-
-	private static class FaceInfo {
-		static final int NO_OPAQUE_TILES = -1;
-
-		int topOpaqueTile = NO_OPAQUE_TILES;
-		final OpaqueSurface[] tiles = new OpaqueSurface[TILES_PER_FACE];
-		int tileCount = 0;
-	}
-
-	private final BlockInfo[][][] data = new BlockInfo[BLOCKS_PER_CHUNK][BLOCKS_PER_CHUNK][BLOCKS_PER_CHUNK];
-
-	{
-		for (int x = 0; x < BLOCKS_PER_CHUNK; ++x) {
-			for (int y = 0; y < BLOCKS_PER_CHUNK; ++y) {
-				for (int z = 0; z < BLOCKS_PER_CHUNK; ++z) {
-					data[x][y][z] = new BlockInfo();
-				}
-			}
-		}
-	}
-
-	@Override
-	public void startRender(ChunkRender chunk) {
-		// Do nothing
-	}
-
-	@Override
-	public void processBlock(BlockRender block, Vec3i pos) {
-		if (!(block instanceof OpaqueCube))
-			return;
-		OpaqueCube opaqueCube = (OpaqueCube) block;
-		addBlock(pos, opaqueCube);
-	}
-
-	@Override
-	public void processTile(TileRender tile, Vec3i pos, BlockFace face) {
-		if (!(tile instanceof OpaqueSurface))
-			return;
-		OpaqueSurface opaqueTile = (OpaqueSurface) tile;
-		addTile(pos, face, opaqueTile);
-	}
-
-	protected void addBlock(Vec3i pos, OpaqueCube cube) {
-		getBlock(pos).block = cube;
-	}
-
-	private void addTile(Vec3i pos, BlockFace face, OpaqueSurface opaqueTile) {
-		FaceInfo faceInfo = getFace(pos, face);
-
-		int index = faceInfo.tileCount;
-		faceInfo.tileCount++;
-
-		faceInfo.tiles[index] = opaqueTile;
-
-		if (opaqueTile.isOpaque(face)) {
-			faceInfo.topOpaqueTile = index;
-		}
-	}
-
-	protected BlockInfo getBlock(Vec3i cursor) {
-		return data[cursor.x][cursor.y][cursor.z];
-	}
-
-	protected FaceInfo getFace(Vec3i cursor, BlockFace face) {
-		return getBlock(cursor).faces[face.getId()];
-	}
-
-	@Override
-	public Shape endRender() {
-
-		Collection<Face> shapeFaces = new ArrayList<>(
-			BLOCKS_PER_CHUNK * BLOCKS_PER_CHUNK * BLOCKS_PER_CHUNK * 3
-		);
-
-		Vec3i cursor = new Vec3i();
-
-		for (cursor.x = 0; cursor.x < BLOCKS_PER_CHUNK; ++cursor.x) {
-			for (cursor.y = 0; cursor.y < BLOCKS_PER_CHUNK; ++cursor.y) {
-				for (cursor.z = 0; cursor.z < BLOCKS_PER_CHUNK; ++cursor.z) {
-					processInnerFaces(cursor, shapeFaces::add);
-					processOuterFaces(cursor, shapeFaces::add);
-				}
-			}
-		}
-
-		return new Shape(
-			Usage.STATIC,
-			WorldRenderProgram.getDefault(),
-			shapeFaces.toArray(new Face[shapeFaces.size()])
-		);
-	}
-
-	private void processOuterFaces(
-		Vec3i cursor,
-		Consumer<Face> output
-	) {
-		for (BlockFace face : BlockFace.getFaces()) {
-			if (!shouldRenderOuterFace(cursor, face))
-				continue;
-
-			Vec3 faceOrigin = new Vec3(cursor.x, cursor.y, cursor.z);
-			Vec3 offset = new Vec3(face.getVector().x, face.getVector().y, face.getVector().z).mul(1f / 128);
-
-			FaceInfo info = getFace(cursor, face);
-
-			if (info.topOpaqueTile == FaceInfo.NO_OPAQUE_TILES) {
-				OpaqueCube block = getBlock(cursor).block;
-
-				if (block != null) {
-					addFace(
-						faceOrigin,
-						face,
-						getBlock(cursor).block.getTexture(face),
-						output
-					);
-
-					faceOrigin.add(offset);
-				}
-			}
-
-			int startLayer = info.topOpaqueTile;
-			if (startLayer == FaceInfo.NO_OPAQUE_TILES) {
-				startLayer = 0;
-			}
-
-			for (int layer = startLayer; layer < info.tileCount; ++layer) {
-				addFace(
-					faceOrigin,
-					face,
-					info.tiles[layer].getTexture(face),
-					output
-				);
-
-				faceOrigin.add(offset);
-			}
-		}
-	}
-
-	private void addFace(
-		Vec3 cursor,
-		BlockFace face,
-		Texture texture,
-		Consumer<Face> output
-	) {
-		if (texture == null)
-			return;
-
-		output.accept(
-			Faces.createBlockFace(
-				WorldRenderProgram.getDefault(),
-				texture,
-				Colors.WHITE,
-				new Vec3(cursor),
-				face,
-				false
-			)
-		);
-	}
-
-	private boolean shouldRenderOuterFace(Vec3i cursor, BlockFace face) {
-		cursor.add(face.getVector());
-		try {
-
-			// TODO handle neighboring chunks properly
-			if (!isInBounds(cursor))
-				return true;
-
-			OpaqueCube adjacent = getBlock(cursor).block;
-
-			if (adjacent == null)
-				return true;
-			if (adjacent.isOpaque(face))
-				return false;
-
-			return true;
-
-		} finally {
-			cursor.sub(face.getVector());
-		}
-	}
-
-	private void processInnerFaces(
-		Vec3i cursor,
-		Consumer<Face> output
-	) {
-//		if (block.isBlockOpaque()) return;
-//		
-//		for (BlockFace face : BlockFace.getFaces()) {
-//			
-//			Texture texture = block.getTexture(face);
-//			if (texture == null) continue;
-//			
-//			output.accept(Faces.createBlockFace(
-//					WorldRenderProgram.getDefault(),
-//					texture,
-//					COLOR_MULTIPLIER,
-//					new Vec3(cursor.x, cursor.y, cursor.z),
-//					face,
-//					true
-//			));
-//			
-//		}
-	}
-
-	private boolean isInBounds(Vec3i cursor) {
-		return isInBounds(cursor.x) &&
-			isInBounds(cursor.y) &&
-			isInBounds(cursor.z);
-	}
-
-	private boolean isInBounds(int c) {
-		return c >= 0 && c < BLOCKS_PER_CHUNK;
-	}
-
-}

src/main/java/ru/windcorp/progressia/client/world/cro/ChunkRenderOptimizerRegistry.java

@@ -0,0 +1,34 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package ru.windcorp.progressia.client.world.cro;
+
+import ru.windcorp.progressia.common.util.namespaces.NamespacedFactoryRegistry;
+
+public class ChunkRenderOptimizerRegistry extends NamespacedFactoryRegistry<ChunkRenderOptimizer> {
+	
+	private static final ChunkRenderOptimizerRegistry INSTANCE = new ChunkRenderOptimizerRegistry();
+	
+	/**
+	 * @return the instance
+	 */
+	public static ChunkRenderOptimizerRegistry getInstance() {
+		return INSTANCE;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/cro/ChunkRenderOptimizerSimple.java

@@ -0,0 +1,99 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.client.world.cro;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.function.Consumer;
+
+import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.client.graphics.backend.Usage;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.Shape;
+import ru.windcorp.progressia.client.graphics.model.ShapePart;
+import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
+import ru.windcorp.progressia.client.world.block.BlockRender;
+import ru.windcorp.progressia.client.world.tile.TileRender;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
+import ru.windcorp.progressia.common.world.rels.RelFace;
+
+public class ChunkRenderOptimizerSimple extends ChunkRenderOptimizer {
+
+	public interface BlockOptimizedSimple {
+
+		void getShapeParts(
+			DefaultChunkData chunk,
+			Vec3i relBlockInChunk,
+			Consumer<ShapePart> output
+		);
+
+	}
+
+	public interface TileOptimizedCustom {
+
+		void getShapeParts(
+			DefaultChunkData chunk,
+			Vec3i relBlockInChunk,
+			RelFace blockFace,
+			Consumer<ShapePart> output
+		);
+
+	}
+
+	private final Collection<ShapePart> parts = new ArrayList<>();
+	private final Consumer<ShapePart> partAdder = parts::add;
+
+	public ChunkRenderOptimizerSimple(String id) {
+		super(id);
+	}
+
+	@Override
+	public void startRender() {
+		parts.clear();
+	}
+
+	@Override
+	public void addBlock(BlockRender block, Vec3i relBlockInChunk) {
+		if (block instanceof BlockOptimizedSimple) {
+			((BlockOptimizedSimple) block).getShapeParts(chunk.getData(), relBlockInChunk, partAdder);
+		}
+	}
+
+	@Override
+	public void addTile(TileRender tile, Vec3i relBlockInChunk, RelFace blockFace) {
+		if (tile instanceof TileOptimizedCustom) {
+			((TileOptimizedCustom) tile).getShapeParts(chunk.getData(), relBlockInChunk, blockFace, partAdder);
+		}
+	}
+
+	@Override
+	public Renderable endRender() {
+
+		if (parts.isEmpty()) {
+			return null;
+		}
+		
+		return new Shape(
+			Usage.STATIC,
+			WorldRenderProgram.getDefault(),
+			parts.toArray(new ShapePart[parts.size()])
+		);
+		
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/cro/ChunkRenderOptimizerSurface.java

@@ -0,0 +1,396 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package ru.windcorp.progressia.client.world.cro;
+
+import static ru.windcorp.progressia.common.world.DefaultChunkData.BLOCKS_PER_CHUNK;
+import static ru.windcorp.progressia.common.world.generic.TileGenericStackRO.TILES_PER_FACE;
+import static ru.windcorp.progressia.common.world.rels.AbsFace.BLOCK_FACE_COUNT;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.function.Consumer;
+
+import glm.vec._3.Vec3;
+import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.client.graphics.backend.Usage;
+import ru.windcorp.progressia.client.graphics.model.ShapePart;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.Shape;
+import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
+import ru.windcorp.progressia.client.world.ChunkRender;
+import ru.windcorp.progressia.client.world.block.BlockRender;
+import ru.windcorp.progressia.client.world.tile.TileRender;
+import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
+import ru.windcorp.progressia.common.world.generic.GenericChunks;
+import ru.windcorp.progressia.common.world.rels.RelFace;
+
+public class ChunkRenderOptimizerSurface extends ChunkRenderOptimizer {
+
+	private static final float OVERLAY_OFFSET = 1 / 128f;
+
+	/**
+	 * A common interface to objects that can provide optimizeable surfaces.
+	 * This is an internal interface; use {@link BlockOptimizedSurface} or
+	 * {@link TileOptimizedSurface} instead.
+	 */
+	private static interface OptimizedSurface {
+
+		/**
+		 * Creates and outputs a set of shape parts that correspond to this
+		 * surface. The coordinates of the face vertices must be in chunk
+		 * coordinate system.
+		 * 
+		 * @param chunk           the chunk that contains the requested face
+		 * @param relBlockInChunk the relative block in chunk
+		 * @param blockFace       the requested face
+		 * @param inner           whether this face should be visible from
+		 *                        inside
+		 *                        ({@code true}) or outside ({@code false})
+		 * @param output          a consumer that the created shape parts must
+		 *                        be
+		 *                        given to
+		 * @param offset          an additional offset that must be applied to
+		 *                        all
+		 *                        vertices
+		 */
+		void getShapeParts(
+			DefaultChunkData chunk,
+			Vec3i relBlockInChunk,
+			RelFace blockFace,
+			boolean inner,
+			Consumer<ShapePart> output,
+			Vec3 offset /* kostyl 156% */
+		);
+
+		/**
+		 * Returns the opacity of the surface identified by the provided
+		 * {@link RelFace}.
+		 * Opaque surfaces prevent surfaces behind them from being included in
+		 * chunk models.
+		 * 
+		 * @param blockFace the face to query
+		 * @return {@code true} iff the surface is opaque.
+		 */
+		boolean isOpaque(RelFace blockFace);
+	}
+
+	/**
+	 * A block that can be optimized by {@link ChunkRenderOptimizerSurface}.
+	 */
+	public static interface BlockOptimizedSurface extends OptimizedSurface {
+
+		/**
+		 * Returns the opacity of the block. Opaque blocks do not expect that
+		 * the camera can be inside them. Opaque blocks prevent surfaces that
+		 * face them
+		 * from being included in chunk models.
+		 * 
+		 * @return {@code true} iff the block is opaque.
+		 */
+		boolean isBlockOpaque();
+	}
+
+	/**
+	 * A tile that can be optimized by {@link ChunkRenderOptimizerSurface}.
+	 */
+	public static interface TileOptimizedSurface extends OptimizedSurface {
+		// Empty for now
+	}
+
+	private static class BlockInfo {
+		BlockOptimizedSurface block;
+		final FaceInfo[] faces = new FaceInfo[BLOCK_FACE_COUNT];
+
+		{
+			for (int i = 0; i < faces.length; ++i) {
+				faces[i] = new FaceInfo(this);
+			}
+		}
+	}
+
+	private static class FaceInfo {
+		static final int BLOCK_LAYER = -1;
+
+		final BlockInfo block;
+
+		int topOpaqueSurface = BLOCK_LAYER;
+		int bottomOpaqueSurface = Integer.MAX_VALUE;
+
+		final TileOptimizedSurface[] tiles = new TileOptimizedSurface[TILES_PER_FACE];
+		int tileCount = 0;
+
+		FaceInfo(BlockInfo block) {
+			this.block = block;
+		}
+
+		OptimizedSurface getSurface(int layer) {
+			return layer == BLOCK_LAYER ? block.block : tiles[layer];
+		}
+	}
+
+	private final BlockInfo[][][] data = new BlockInfo[BLOCKS_PER_CHUNK][BLOCKS_PER_CHUNK][BLOCKS_PER_CHUNK];
+
+	public ChunkRenderOptimizerSurface(String id) {
+		super(id);
+	}
+
+	@Override
+	public void startRender() {
+		for (int x = 0; x < BLOCKS_PER_CHUNK; ++x) {
+			for (int y = 0; y < BLOCKS_PER_CHUNK; ++y) {
+				for (int z = 0; z < BLOCKS_PER_CHUNK; ++z) {
+					data[x][y][z] = new BlockInfo();
+				}
+			}
+		}
+	}
+
+	@Override
+	public void addBlock(BlockRender block, Vec3i relBlockInChunk) {
+		if (!(block instanceof BlockOptimizedSurface))
+			return;
+
+		BlockOptimizedSurface bos = (BlockOptimizedSurface) block;
+		addBlock(relBlockInChunk, bos);
+	}
+
+	@Override
+	public void addTile(TileRender tile, Vec3i relBlockInChunk, RelFace face) {
+		if (!(tile instanceof TileOptimizedSurface))
+			return;
+
+		TileOptimizedSurface tos = (TileOptimizedSurface) tile;
+		addTile(relBlockInChunk, face, tos);
+	}
+
+	private void addBlock(Vec3i relBlockInChunk, BlockOptimizedSurface block) {
+		getBlock(relBlockInChunk).block = block;
+	}
+
+	private void addTile(Vec3i relBlockInChunk, RelFace face, TileOptimizedSurface tile) {
+		FaceInfo faceInfo = getFace(relBlockInChunk, face);
+
+		int index = faceInfo.tileCount;
+		faceInfo.tileCount++;
+
+		faceInfo.tiles[index] = tile;
+
+		if (tile.isOpaque(face)) {
+			faceInfo.topOpaqueSurface = index;
+
+			if (faceInfo.bottomOpaqueSurface == FaceInfo.BLOCK_LAYER) {
+				faceInfo.bottomOpaqueSurface = index;
+			}
+		}
+	}
+
+	protected BlockInfo getBlock(Vec3i relBlockInChunk) {
+		return data[relBlockInChunk.x][relBlockInChunk.y][relBlockInChunk.z];
+	}
+
+	protected FaceInfo getFace(Vec3i relBlockInChunk, RelFace face) {
+		return getBlock(relBlockInChunk).faces[face.getId()];
+	}
+
+	@Override
+	public Renderable endRender() {
+		Collection<ShapePart> shapeParts = new ArrayList<>(
+			BLOCKS_PER_CHUNK * BLOCKS_PER_CHUNK * BLOCKS_PER_CHUNK * 3
+		);
+
+		Consumer<ShapePart> consumer = shapeParts::add;
+
+		GenericChunks.forEachBiC(relBlockInChunk -> {
+			processInnerFaces(relBlockInChunk, consumer);
+			processOuterFaces(relBlockInChunk, consumer);
+		});
+
+		if (shapeParts.isEmpty()) {
+			return null;
+		}
+
+		return new Shape(
+			Usage.STATIC,
+			WorldRenderProgram.getDefault(),
+			shapeParts.toArray(new ShapePart[shapeParts.size()])
+		);
+	}
+
+	private void processOuterFaces(
+		Vec3i relBlockInChunk,
+		Consumer<ShapePart> output
+	) {
+		for (RelFace blockFace : RelFace.getFaces()) {
+			processOuterFace(relBlockInChunk, blockFace, output);
+		}
+	}
+
+	private void processOuterFace(Vec3i relBlockInChunk, RelFace blockFace, Consumer<ShapePart> output) {
+		if (!shouldRenderOuterFace(relBlockInChunk, blockFace))
+			return;
+
+		FaceInfo info = getFace(relBlockInChunk, blockFace);
+
+		if (info.tileCount == 0 && info.block.block == null)
+			return;
+
+		Vec3 faceOrigin = new Vec3(relBlockInChunk.x, relBlockInChunk.y, relBlockInChunk.z);
+		Vec3 offset = new Vec3(blockFace.getRelFloatVector()).mul(OVERLAY_OFFSET);
+
+		for (
+			int layer = info.topOpaqueSurface;
+			layer < info.tileCount;
+			++layer
+		) {
+			OptimizedSurface surface = info.getSurface(layer);
+			if (surface == null)
+				continue; // layer may be BLOCK_LAYER, then block may be null
+
+			surface.getShapeParts(chunk.getData(), relBlockInChunk, blockFace, false, output, faceOrigin);
+
+			faceOrigin.add(offset);
+		}
+	}
+
+	private void processInnerFaces(Vec3i relBlockInChunk, Consumer<ShapePart> output) {
+		for (RelFace blockFace : RelFace.getFaces()) {
+			processInnerFace(relBlockInChunk, blockFace, output);
+		}
+	}
+
+	private void processInnerFace(Vec3i relBlockInChunk, RelFace blockFace, Consumer<ShapePart> output) {
+		if (!shouldRenderInnerFace(relBlockInChunk, blockFace))
+			return;
+
+		FaceInfo info = getFace(relBlockInChunk, blockFace);
+
+		if (info.tileCount == 0 && info.block.block == null)
+			return;
+
+		Vec3 faceOrigin = new Vec3(relBlockInChunk.x, relBlockInChunk.y, relBlockInChunk.z);
+		Vec3 offset = new Vec3(blockFace.getRelFloatVector()).mul(OVERLAY_OFFSET);
+
+		for (
+			int layer = FaceInfo.BLOCK_LAYER;
+			layer <= info.bottomOpaqueSurface && layer < info.tileCount;
+			++layer
+		) {
+			OptimizedSurface surface = info.getSurface(layer);
+			if (surface == null)
+				continue; // layer may be BLOCK_LAYER, then block may be null
+
+			surface.getShapeParts(chunk.getData(), relBlockInChunk, blockFace, true, output, faceOrigin);
+
+			faceOrigin.add(offset);
+		}
+	}
+
+	private boolean shouldRenderOuterFace(Vec3i relBlockInChunk, RelFace face) {
+		relBlockInChunk.add(face.getRelVector());
+		try {
+			return shouldRenderWhenFacing(relBlockInChunk, face);
+		} finally {
+			relBlockInChunk.sub(face.getRelVector());
+		}
+	}
+
+	private boolean shouldRenderInnerFace(Vec3i relBlockInChunk, RelFace face) {
+		return shouldRenderWhenFacing(relBlockInChunk, face);
+	}
+
+	private boolean shouldRenderWhenFacing(Vec3i relBlockInChunk, RelFace face) {
+		if (GenericChunks.containsBiC(relBlockInChunk)) {
+			return shouldRenderWhenFacingLocal(relBlockInChunk, face);
+		} else {
+			return shouldRenderWhenFacingNeighbor(relBlockInChunk, face);
+		}
+	}
+
+	private boolean shouldRenderWhenFacingLocal(Vec3i relBlockInChunk, RelFace face) {
+		BlockOptimizedSurface block = getBlock(relBlockInChunk).block;
+
+		if (block == null) {
+			return true;
+		}
+		if (block.isOpaque(face)) {
+			return false;
+		}
+
+		return true;
+	}
+
+	private boolean shouldRenderWhenFacingNeighbor(Vec3i relBlockInLocalChunk, RelFace face) {
+		Vec3i blockInChunk = Vectors.grab3i();
+		chunk.resolve(relBlockInLocalChunk, blockInChunk);
+		Vec3i chunkPos = Vectors.grab3i().set(chunk.getX(), chunk.getY(), chunk.getZ());
+
+		try {
+			// Determine blockInChunk and chunkPos
+			if (blockInChunk.x == -1) {
+				blockInChunk.x = BLOCKS_PER_CHUNK - 1;
+				chunkPos.x -= 1;
+			} else if (blockInChunk.x == BLOCKS_PER_CHUNK) {
+				blockInChunk.x = 0;
+				chunkPos.x += 1;
+			} else if (blockInChunk.y == -1) {
+				blockInChunk.y = BLOCKS_PER_CHUNK - 1;
+				chunkPos.y -= 1;
+			} else if (blockInChunk.y == BLOCKS_PER_CHUNK) {
+				blockInChunk.y = 0;
+				chunkPos.y += 1;
+			} else if (blockInChunk.z == -1) {
+				blockInChunk.z = BLOCKS_PER_CHUNK - 1;
+				chunkPos.z -= 1;
+			} else if (blockInChunk.z == BLOCKS_PER_CHUNK) {
+				blockInChunk.z = 0;
+				chunkPos.z += 1;
+			} else {
+				throw new AssertionError(
+					"Requested incorrent neighbor ("
+						+ relBlockInLocalChunk.x + "; "
+						+ relBlockInLocalChunk.y + "; "
+						+ relBlockInLocalChunk.z + ")"
+				);
+			}
+
+			ChunkRender chunk = this.chunk.getWorld().getChunk(chunkPos);
+			if (chunk == null)
+				return false;
+
+			BlockRender block = chunk.getBlock(blockInChunk);
+			if (!(block instanceof BlockOptimizedSurface))
+				return true;
+
+			BlockOptimizedSurface bos = (BlockOptimizedSurface) block;
+			RelFace rotatedFace = face.rotate(this.chunk.getUp(), chunk.getUp());
+
+			if (!bos.isOpaque(rotatedFace)) {
+				return true;
+			}
+
+			return false;
+
+		} finally {
+			Vectors.release(blockInChunk);
+			Vectors.release(chunkPos);
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/entity/EntityRenderable.java

@@ -15,22 +15,49 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+
 package ru.windcorp.progressia.client.world.entity;
 
 import glm.vec._3.Vec3;
+import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
 import ru.windcorp.progressia.common.world.entity.EntityData;
-import ru.windcorp.progressia.common.world.generic.GenericEntity;
+import ru.windcorp.progressia.common.world.generic.EntityGeneric;
 
-public abstract class EntityRenderable implements Renderable, GenericEntity {
+public abstract class EntityRenderable implements Renderable, EntityGeneric {
 
 	private final EntityData data;
+	
+	private long stateComputedForFrame = -1;
 
 	public EntityRenderable(EntityData data) {
 		this.data = data;
 	}
 
+	/**
+	 * Updates the state of this model. This method is invoked exactly once per
+	 * renderable per frame before this entity is queried for the first time.
+	 */
+	protected void update() {
+		// Do nothing
+	}
+	
+	private void updateIfNecessary() {
+		if (stateComputedForFrame != GraphicsInterface.getFramesRendered()) {
+			update();
+			stateComputedForFrame = GraphicsInterface.getFramesRendered();
+		}
+	}
+	
+	@Override
+	public final void render(ShapeRenderHelper renderer) {
+		updateIfNecessary();
+		doRender(renderer);
+	}
+	
+	protected abstract void doRender(ShapeRenderHelper renderer);
+
 	public EntityData getData() {
 		return data;
 	}
@@ -44,8 +71,42 @@ public abstract class EntityRenderable implements Renderable, GenericEntity {
 	public String getId() {
 		return getData().getId();
 	}
+	
+	@Override
+	public long getEntityId() {
+		return getData().getEntityId();
+	}
 
-	public void getViewPoint(Vec3 output) {
+	public final Vec3 getLookingAt(Vec3 output) {
+		if (output == null) output = new Vec3();
+		updateIfNecessary();
+		doGetLookingAt(output);
+		return output;
+	}
+	
+	protected void doGetLookingAt(Vec3 output) {
+		output.set(getData().getLookingAt());
+	}
+
+	public final Vec3 getUpVector(Vec3 output) {
+		if (output == null) output = new Vec3();
+		updateIfNecessary();
+		doGetUpVector(output);
+		return output;
+	}
+	
+	protected void doGetUpVector(Vec3 output) {
+		output.set(getData().getUpVector());
+	}
+
+	public final Vec3 getViewPoint(Vec3 output) {
+		if (output == null) output = new Vec3();
+		updateIfNecessary();
+		doGetViewPoint(output);
+		return output;
+	}
+	
+	protected void doGetViewPoint(Vec3 output) {
 		output.set(0, 0, 0);
 	}
 

src/main/java/ru/windcorp/progressia/client/world/entity/HumanoidModel.java

@@ -43,6 +43,7 @@ public class HumanoidModel extends NPedModel {
 
 		@Override
 		protected void applyTransform(Mat4 mat, NPedModel model) {
+			super.applyTransform(mat, model);
 			float phase = model.getWalkingFrequency() * model.getWalkingParameter() + animationOffset;
 			float value = sin(phase);
 			float amplitude = getSwingAmplitude((HumanoidModel) model) * model.getVelocityParameter();

src/main/java/ru/windcorp/progressia/client/world/entity/NPedModel.java

@@ -18,11 +18,8 @@
  
 package ru.windcorp.progressia.client.world.entity;
 
-import static java.lang.Math.atan2;
-import static java.lang.Math.min;
 import static java.lang.Math.pow;
 import static java.lang.Math.toRadians;
-import static ru.windcorp.progressia.common.util.FloatMathUtil.normalizeAngle;
 
 import glm.Glm;
 import glm.mat._4.Mat4;
@@ -32,6 +29,9 @@ import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
 import ru.windcorp.progressia.common.Units;
+import ru.windcorp.progressia.common.util.FloatMathUtil;
+import ru.windcorp.progressia.common.util.VectorUtil;
+import ru.windcorp.progressia.common.util.Vectors;
 import ru.windcorp.progressia.common.world.entity.EntityData;
 
 public abstract class NPedModel extends EntityRenderable {
@@ -51,29 +51,30 @@ public abstract class NPedModel extends EntityRenderable {
 			ShapeRenderHelper renderer,
 			NPedModel model
 		) {
-			renderer.pushTransform().translate(translation);
 			applyTransform(renderer.pushTransform(), model);
 			renderable.render(renderer);
 			renderer.popTransform();
-			renderer.popTransform();
 		}
 
-		protected abstract void applyTransform(Mat4 mat, NPedModel model);
+		protected void applyTransform(Mat4 mat, NPedModel model) {
+			mat.translate(getTranslation());
+		}
 
 		public Vec3 getTranslation() {
 			return translation;
 		}
+		
+		public Mat4 getTransform(Mat4 output, NPedModel model) {
+			if (output == null) output = new Mat4().identity();
+			applyTransform(output, model);
+			return output;
+		}
 	}
 
 	public static class Body extends BodyPart {
 		public Body(Renderable renderable) {
 			super(renderable, null);
 		}
-
-		@Override
-		protected void applyTransform(Mat4 mat, NPedModel model) {
-			// Do nothing
-		}
 	}
 
 	public static class Head extends BodyPart {
@@ -97,7 +98,8 @@ public abstract class NPedModel extends EntityRenderable {
 
 		@Override
 		protected void applyTransform(Mat4 mat, NPedModel model) {
-			mat.rotateZ(model.getHeadYaw()).rotateY(model.getHeadPitch());
+			super.applyTransform(mat, model);
+			mat.rotateZ(-model.getHeadYaw()).rotateY(-model.getHeadPitch());
 		}
 
 		public Vec3 getViewPoint() {
@@ -105,6 +107,8 @@ public abstract class NPedModel extends EntityRenderable {
 		}
 	}
 
+	public static boolean flag;
+
 	protected final Body body;
 	protected final Head head;
 
@@ -128,7 +132,9 @@ public abstract class NPedModel extends EntityRenderable {
 
 	private float walkingFrequency;
 
-	private float bodyYaw = Float.NaN;
+	private final Vec3 bodyLookingAt = new Vec3().set(0);
+	private final Mat4 bodyTransform = new Mat4(); 
+	
 	private float headYaw;
 	private float headPitch;
 
@@ -138,68 +144,121 @@ public abstract class NPedModel extends EntityRenderable {
 		this.head = head;
 		this.scale = scale;
 
-		evaluateAngles();
+		computeRotations();
 	}
 
 	@Override
-	public void render(ShapeRenderHelper renderer) {
+	protected void doRender(ShapeRenderHelper renderer) {
-		renderer.pushTransform().scale(scale).rotateZ(bodyYaw);
+		renderer.pushTransform().scale(scale).mul(bodyTransform);
 		renderBodyParts(renderer);
 		renderer.popTransform();
-
-		accountForVelocity();
-		evaluateAngles();
 	}
 
 	protected void renderBodyParts(ShapeRenderHelper renderer) {
 		body.render(renderer, this);
 		head.render(renderer, this);
 	}
-
+	
-	private void evaluateAngles() {
+	@Override
-		float globalYaw = normalizeAngle(getData().getYaw());
+	protected void update() {
-
+		advanceTime();
-		if (Float.isNaN(bodyYaw)) {
+		computeRotations();
-			bodyYaw = globalYaw;
-			headYaw = 0;
-		} else {
-			headYaw = normalizeAngle(globalYaw - bodyYaw);
-
-			if (headYaw > +head.maxYaw) {
-				bodyYaw += headYaw - +head.maxYaw;
-				headYaw = +head.maxYaw;
-			} else if (headYaw < -head.maxYaw) {
-				bodyYaw += headYaw - -head.maxYaw;
-				headYaw = -head.maxYaw;
-			}
-		}
-
-		bodyYaw = normalizeAngle(bodyYaw);
-
-		headPitch = Glm.clamp(
-			getData().getPitch(),
-			-head.maxPitch,
-			head.maxPitch
-		);
 	}
 
-	private void accountForVelocity() {
+	private void computeRotations() {
-		Vec3 horizontal = new Vec3(getData().getVelocity());
+		if (!bodyLookingAt.any()) {
-		horizontal.z = 0;
+			getData().getForwardVector(bodyLookingAt);
+			headYaw = 0;
+		} else {
+			ensureBodyLookingAtIsPerpendicularToUpVector();
+			computeDesiredHeadYaw();
+			clampHeadYawAndChangeBodyLookingAt();
+		}
+		
+		recomputeBodyTransform();
+
+		setHeadPitch();
+	}
+
+	private void ensureBodyLookingAtIsPerpendicularToUpVector() {
+		Vec3 up = getData().getUpVector();
+		if (up.dot(bodyLookingAt) > 1 - 1e-4) return;
+		
+		Vec3 tmp = Vectors.grab3();
+		
+		tmp.set(up).mul(-up.dot(bodyLookingAt)).add(bodyLookingAt);
+		
+		float tmpLength = tmp.length();
+		if (tmpLength > 1e-4) {
+			bodyLookingAt.set(tmp).div(tmpLength);
+		} else {
+			// bodyLookingAt is suddenly parallel to up vector -- PANIC! ENTERING RESCUE MODE!
+			getData().getForwardVector(bodyLookingAt);
+		}
+		
+		Vectors.release(tmp);
+	}
+
+	private void computeDesiredHeadYaw() {
+		Vec3 newDirection = getData().getForwardVector(null);
+		Vec3 oldDirection = bodyLookingAt;
+		Vec3 up = getData().getUpVector();
+		
+		headYaw = (float) VectorUtil.getAngle(oldDirection, newDirection, up);
+	}
+
+	private void clampHeadYawAndChangeBodyLookingAt() {
+		float bodyYawChange = 0;
+		
+		if (headYaw > +head.maxYaw) {
+			bodyYawChange = headYaw - +head.maxYaw;
+			headYaw = +head.maxYaw;
+		} else if (headYaw < -head.maxYaw) {
+			bodyYawChange = headYaw - -head.maxYaw;
+			headYaw = -head.maxYaw;
+		}
+		
+		if (bodyYawChange != 0) {
+			VectorUtil.rotate(bodyLookingAt, getData().getUpVector(), bodyYawChange);
+		}
+	}
+
+	private void recomputeBodyTransform() {
+		Vec3 u = getData().getUpVector();
+		Vec3 f = bodyLookingAt;
+		Vec3 s = Vectors.grab3();
+		
+		s.set(u).cross(f);
+		
+		bodyTransform.identity().set(
+			+f.x, +f.y, +f.z,    0,
+			-s.x, -s.y, -s.z,    0,
+			+u.x, +u.y, +u.z,    0,
+			   0,    0,    0,    1
+		);
+		
+		Vectors.release(s);
+	}
+
+	private void setHeadPitch() {
+		headPitch = Glm.clamp((float) getData().getPitch(), -head.maxPitch, +head.maxPitch);
+	}
+
+	private void advanceTime() {
+		Vec3 horizontal = getData().getUpVector()
+			.mul_(-getData().getUpVector().dot(getData().getVelocity()))
+			.add(getData().getVelocity());
 
 		velocity = horizontal.length();
 
-		evaluateVelocityCoeff();
+		computeVelocityParameter();
 
-		// TODO switch to world time
 		walkingParameter += velocity * GraphicsInterface.getFrameLength() * 1000;
-
+		
-		bodyYaw += velocityParameter * normalizeAngle(
+		rotateBodyWithMovement(horizontal);
-			(float) (atan2(horizontal.y, horizontal.x) - bodyYaw)
-		) * min(1, GraphicsInterface.getFrameLength() * 10);
 	}
 
-	private void evaluateVelocityCoeff() {
+	private void computeVelocityParameter() {
 		if (velocity > maxEffectiveVelocity) {
 			velocityParameter = 1;
 		} else {
@@ -207,17 +266,39 @@ public abstract class NPedModel extends EntityRenderable {
 		}
 	}
 
+	private void rotateBodyWithMovement(Vec3 target) {
+		if (velocityParameter == 0 || !target.any() || Glm.equals(target, bodyLookingAt)) {
+			return;
+		}
+		
+		Vec3 axis = getData().getUpVector();
+		
+		float yawDifference = FloatMathUtil.normalizeAngle(
+			(float) VectorUtil.getAngle(
+				bodyLookingAt,
+				target.normalize_(),
+				axis
+			)
+		);
+		
+		float bodyYawChange =
+			velocityParameter *
+			yawDifference *
+			(float) Math.expm1(GraphicsInterface.getFrameLength() * 10);
+		
+		VectorUtil.rotate(bodyLookingAt, axis, bodyYawChange);
+	}
+
 	@Override
-	public void getViewPoint(Vec3 output) {
+	protected void doGetViewPoint(Vec3 output) {
 		Mat4 m = new Mat4();
 		Vec4 v = new Vec4();
 
 		m.identity()
 			.scale(scale)
-			.rotateZ(bodyYaw)
+			.mul(bodyTransform);
-			.translate(head.getTranslation())
+		
-			.rotateZ(headYaw)
+		head.getTransform(m, this);
-			.rotateY(headPitch);
 
 		v.set(head.getViewPoint(), 1);
 		m.mul(v);
@@ -232,9 +313,9 @@ public abstract class NPedModel extends EntityRenderable {
 	public Head getHead() {
 		return head;
 	}
-
+	
-	public float getBodyYaw() {
+	public Vec3 getBodyLookingAt() {
-		return bodyYaw;
+		return bodyLookingAt;
 	}
 
 	public float getHeadYaw() {

src/main/java/ru/windcorp/progressia/client/world/entity/QuadripedModel.java

@@ -44,6 +44,7 @@ public class QuadripedModel extends NPedModel {
 
 		@Override
 		protected void applyTransform(Mat4 mat, NPedModel model) {
+			super.applyTransform(mat, model);
 			float phase = model.getWalkingFrequency() * model.getWalkingParameter() + animationOffset;
 			float value = sin(phase);
 			float amplitude = ((QuadripedModel) model).getWalkingSwing() * model.getVelocityParameter();

src/main/java/ru/windcorp/progressia/client/world/tile/TileRender.java

@@ -18,26 +18,21 @@
  
 package ru.windcorp.progressia.client.world.tile;
 
-import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
+import glm.vec._3.i.Vec3i;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
 import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizer;
 import ru.windcorp.progressia.common.util.namespaces.Namespaced;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
-import ru.windcorp.progressia.common.world.generic.GenericTile;
+import ru.windcorp.progressia.common.world.generic.TileGeneric;
+import ru.windcorp.progressia.common.world.rels.RelFace;
 
-public class TileRender extends Namespaced implements GenericTile {
+public class TileRender extends Namespaced implements TileGeneric {
 
 	public TileRender(String id) {
 		super(id);
 	}
 
-	public void render(ShapeRenderHelper renderer, BlockFace face) {
+	public Renderable createRenderable(DefaultChunkData chunk, Vec3i blockInChunk, RelFace face) {
-		throw new UnsupportedOperationException(
-			"TileRender.render() not implemented in " + this
-		);
-	}
-
-	public Renderable createRenderable(BlockFace face) {
 		return null;
 	}
 

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderCross.java

@@ -0,0 +1,170 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.client.world.tile;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.function.Consumer;
+
+import glm.mat._3.Mat3;
+import glm.mat._4.Mat4;
+import glm.vec._3.Vec3;
+import glm.vec._3.i.Vec3i;
+import glm.vec._4.Vec4;
+import ru.windcorp.progressia.client.graphics.Colors;
+import ru.windcorp.progressia.client.graphics.backend.Usage;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.Shape;
+import ru.windcorp.progressia.client.graphics.model.ShapePart;
+import ru.windcorp.progressia.client.graphics.model.ShapeParts;
+import ru.windcorp.progressia.client.graphics.texture.Texture;
+import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
+import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizerSimple.TileOptimizedCustom;
+import ru.windcorp.progressia.common.util.Matrices;
+import ru.windcorp.progressia.common.util.VectorUtil;
+import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
+import ru.windcorp.progressia.common.world.rels.AxisRotations;
+import ru.windcorp.progressia.common.world.rels.RelFace;
+
+public class TileRenderCross extends TileRender implements TileOptimizedCustom {
+
+	private static final float SQRT_2_OVER_2 = (float) Math.sqrt(2) / 2;
+	private static final float[] ONE_AND_NEGATIVE_ONE = new float[] { 1, -1 };
+
+	private final Texture texture;
+	private final float width;
+
+	public TileRenderCross(String id, Texture texture, boolean allowStretching) {
+		super(id);
+		this.texture = texture;
+		this.width = allowStretching ? 1 : SQRT_2_OVER_2;
+	}
+
+	public Texture getTexture(RelFace blockFace) {
+		return texture;
+	}
+
+	public Vec4 getColorMultiplier(RelFace blockFace) {
+		return Colors.WHITE;
+	}
+
+	@Override
+	public void getShapeParts(
+		DefaultChunkData chunk,
+		Vec3i bic,
+		RelFace blockFace,
+		Consumer<ShapePart> output
+	) {
+		Mat4 transform = Matrices.grab4();
+		Vec3 origin = Vectors.grab3();
+		Vec3 width = Vectors.grab3();
+		Vec3 height = Vectors.grab3();
+
+		Mat3 resolutionMatrix = AxisRotations.getResolutionMatrix3(blockFace.resolve(AbsFace.POS_Z));
+
+		Vec4 color = getColorMultiplier(blockFace);
+		Texture texture = getTexture(blockFace);
+		float originOffset = (1 - this.width) / 2;
+
+		WorldRenderProgram program = WorldRenderProgram.getDefault();
+
+		for (int i = 0; getTransform(chunk, bic, blockFace, i, transform); i++) {
+
+			for (float flip : ONE_AND_NEGATIVE_ONE) {
+				origin.set(flip * (originOffset - 0.5f), originOffset - 0.5f, 0);
+				width.set(flip * this.width, this.width, 0);
+				height.set(0, 0, 1);
+
+				VectorUtil.applyMat4(origin, transform);
+				VectorUtil.rotateOnly(width, transform);
+				VectorUtil.rotateOnly(height, transform);
+
+				origin.z += 1 - 0.5f;
+
+				if (blockFace != RelFace.UP) {
+					resolutionMatrix.mul(origin);
+					resolutionMatrix.mul(width);
+					resolutionMatrix.mul(height);
+				}
+
+				origin.add(bic.x, bic.y, bic.z);
+
+				output.accept(
+					ShapeParts.createRectangle(
+						program,
+						texture,
+						color,
+						origin,
+						width,
+						height,
+						false
+					)
+				);
+				output.accept(
+					ShapeParts.createRectangle(
+						program,
+						texture,
+						color,
+						origin,
+						width,
+						height,
+						true
+					)
+				);
+			}
+
+		}
+
+		Matrices.release(transform);
+		Vectors.release(origin);
+		Vectors.release(width);
+		Vectors.release(height);
+	}
+
+	protected boolean getTransform(
+		DefaultChunkData chunk,
+		Vec3i relBlockInChunk,
+		RelFace blockFace,
+		int count,
+		Mat4 output
+	) {
+		output.identity();
+		return count == 0;
+	}
+
+	@Override
+	public Renderable createRenderable(DefaultChunkData chunk, Vec3i blockInChunk, RelFace blockFace) {
+		Collection<ShapePart> parts = new ArrayList<>(4);
+
+		getShapeParts(chunk, blockInChunk, blockFace, parts::add);
+
+		return new Shape(
+			Usage.STATIC,
+			WorldRenderProgram.getDefault(),
+			parts.toArray(new ShapePart[parts.size()])
+		);
+	}
+
+	@Override
+	public boolean needsOwnRenderable() {
+		return false;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderGrass.java

@@ -1,81 +0,0 @@
-/*
- * Progressia
- * Copyright (C)  2020-2021  Wind Corporation and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
- 
-package ru.windcorp.progressia.client.world.tile;
-
-import glm.vec._3.Vec3;
-import ru.windcorp.progressia.client.graphics.Colors;
-import ru.windcorp.progressia.client.graphics.backend.Usage;
-import ru.windcorp.progressia.client.graphics.model.Faces;
-import ru.windcorp.progressia.client.graphics.model.Shape;
-import ru.windcorp.progressia.client.graphics.model.ShapeRenderProgram;
-import ru.windcorp.progressia.client.graphics.model.Renderable;
-import ru.windcorp.progressia.client.graphics.texture.Texture;
-import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
-import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizerCube.OpaqueSurface;
-import ru.windcorp.progressia.common.world.block.BlockFace;
-
-public class TileRenderGrass extends TileRender implements OpaqueSurface {
-
-	private final Texture topTexture;
-	private final Texture sideTexture;
-
-	public TileRenderGrass(
-		String id,
-		Texture top,
-		Texture side
-	) {
-		super(id);
-		this.topTexture = top;
-		this.sideTexture = side;
-	}
-
-	@Override
-	public Texture getTexture(BlockFace face) {
-		return (face == BlockFace.TOP) ? topTexture : sideTexture;
-	}
-
-	@Override
-	public boolean isOpaque(BlockFace face) {
-		return face == BlockFace.TOP;
-	}
-
-	@Override
-	public Renderable createRenderable(BlockFace face) {
-		ShapeRenderProgram program = WorldRenderProgram.getDefault();
-
-		return new Shape(
-			Usage.STATIC,
-			WorldRenderProgram.getDefault(),
-			Faces.createBlockFace(
-				program,
-				getTexture(face),
-				Colors.WHITE,
-				new Vec3(0, 0, 0),
-				face,
-				false
-			)
-		);
-	}
-
-	@Override
-	public boolean needsOwnRenderable() {
-		return false;
-	}
-
-}

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderNone.java

@@ -15,31 +15,28 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+package ru.windcorp.progressia.client.world.tile;
-package ru.windcorp.progressia.client.world.cro;
 
-import com.google.common.base.Supplier;
+import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.client.graphics.model.EmptyModel;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
+import ru.windcorp.progressia.common.world.rels.RelFace;
 
-import ru.windcorp.progressia.common.util.namespaces.Namespaced;
+public class TileRenderNone extends TileRender {
 
-public abstract class ChunkRenderOptimizerSupplier extends Namespaced {
+	public TileRenderNone(String id) {
-
-	public ChunkRenderOptimizerSupplier(String id) {
 		super(id);
 	}
-
+	
-	public abstract ChunkRenderOptimizer createOptimizer();
+	@Override
-
+	public Renderable createRenderable(DefaultChunkData chunk, Vec3i blockInChunk, RelFace face) {
-	public static ChunkRenderOptimizerSupplier of(
+		return EmptyModel.getInstance();
-		String id,
+	}
-		Supplier<ChunkRenderOptimizer> supplier
+	
-	) {
+	@Override
-		return new ChunkRenderOptimizerSupplier(id) {
+	public boolean needsOwnRenderable() {
-			@Override
+		return false;
-			public ChunkRenderOptimizer createOptimizer() {
-				return supplier.get();
-			}
-		};
 	}
 
 }

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderOpaqueSurface.java

@@ -19,7 +19,7 @@
 package ru.windcorp.progressia.client.world.tile;
 
 import ru.windcorp.progressia.client.graphics.texture.Texture;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.RelFace;
 
 public class TileRenderOpaqueSurface extends TileRenderSurface {
 
@@ -28,7 +28,7 @@ public class TileRenderOpaqueSurface extends TileRenderSurface {
 	}
 
 	@Override
-	public boolean isOpaque(BlockFace face) {
+	public boolean isOpaque(RelFace face) {
 		return true;
 	}
 

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderReference.java

@@ -0,0 +1,27 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.client.world.tile;
+
+import ru.windcorp.progressia.client.world.ChunkRender;
+import ru.windcorp.progressia.client.world.block.BlockRender;
+import ru.windcorp.progressia.common.world.generic.TileGenericReferenceRO;
+
+public interface TileRenderReference
+	extends TileGenericReferenceRO<BlockRender, TileRender, TileRenderStack, TileRenderReference, ChunkRender> {
+
+}

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderStack.java

@@ -18,12 +18,15 @@
  
 package ru.windcorp.progressia.client.world.tile;
 
-import ru.windcorp.progressia.client.world.ChunkRender;
+import java.util.AbstractList;
-import ru.windcorp.progressia.common.world.generic.GenericTileStack;
-import ru.windcorp.progressia.common.world.tile.TileDataStack;
 
+import ru.windcorp.progressia.client.world.ChunkRender;
+import ru.windcorp.progressia.client.world.block.BlockRender;
+import ru.windcorp.progressia.common.world.TileDataStack;
+import ru.windcorp.progressia.common.world.generic.TileGenericStackRO;
 public abstract class TileRenderStack
-	extends GenericTileStack<TileRenderStack, TileRender, ChunkRender> {
+	extends AbstractList<TileRender>
+	implements TileGenericStackRO<BlockRender, TileRender, TileRenderStack, TileRenderReference, ChunkRender> {
 
 	public abstract TileDataStack getData();
 

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderSurface.java

@@ -18,19 +18,26 @@
  
 package ru.windcorp.progressia.client.world.tile;
 
+import java.util.function.Consumer;
+
 import glm.vec._3.Vec3;
+import glm.vec._3.i.Vec3i;
+import glm.vec._4.Vec4;
 import ru.windcorp.progressia.client.graphics.Colors;
 import ru.windcorp.progressia.client.graphics.backend.Usage;
-import ru.windcorp.progressia.client.graphics.model.Faces;
+import ru.windcorp.progressia.client.graphics.model.ShapePart;
+import ru.windcorp.progressia.client.graphics.model.ShapeParts;
 import ru.windcorp.progressia.client.graphics.model.Shape;
-import ru.windcorp.progressia.client.graphics.model.ShapeRenderProgram;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
 import ru.windcorp.progressia.client.graphics.texture.Texture;
 import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
-import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizerCube.OpaqueSurface;
+import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizerSurface.TileOptimizedSurface;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.DefaultChunkData;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
+import ru.windcorp.progressia.common.world.rels.RelFace;
 
-public abstract class TileRenderSurface extends TileRender implements OpaqueSurface {
+public abstract class TileRenderSurface extends TileRender implements TileOptimizedSurface {
 
 	private final Texture texture;
 
@@ -38,27 +45,52 @@ public abstract class TileRenderSurface extends TileRender implements OpaqueSurf
 		super(id);
 		this.texture = texture;
 	}
+	
+	public TileRenderSurface(String id) {
+		this(id, null);
+	}
 
-	@Override
+	public Texture getTexture(RelFace blockFace) {
-	public Texture getTexture(BlockFace face) {
 		return texture;
 	}
+	
+	public Vec4 getColorMultiplier(RelFace blockFace) {
+		return Colors.WHITE;
+	}
+	
+	@Override
+	public final void getShapeParts(
+		DefaultChunkData chunk, Vec3i relBlockInChunk, RelFace blockFace,
+		boolean inner,
+		Consumer<ShapePart> output,
+		Vec3 offset
+	) {
+		output.accept(createFace(chunk, relBlockInChunk, blockFace, inner, offset));
+	}
+	
+	private ShapePart createFace(
+		DefaultChunkData chunk, Vec3i blockInChunk, RelFace blockFace,
+		boolean inner,
+		Vec3 offset
+	) {
+		return ShapeParts.createBlockFace(
+			WorldRenderProgram.getDefault(),
+			getTexture(blockFace),
+			getColorMultiplier(blockFace),
+			offset,
+			blockFace.resolve(AbsFace.POS_Z),
+			inner
+		);
+	}
 
 	@Override
-	public Renderable createRenderable(BlockFace face) {
+	public Renderable createRenderable(DefaultChunkData chunk, Vec3i blockInChunk, RelFace blockFace) {
-		ShapeRenderProgram program = WorldRenderProgram.getDefault();
-
 		return new Shape(
 			Usage.STATIC,
 			WorldRenderProgram.getDefault(),
-			Faces.createBlockFace(
+			
-				program,
+			createFace(chunk, blockInChunk, blockFace, false, Vectors.ZERO_3),
-				getTexture(face),
+			createFace(chunk, blockInChunk, blockFace, true,  Vectors.ZERO_3)
-				Colors.WHITE,
-				new Vec3(0, 0, 0),
-				face,
-				false
-			)
 		);
 	}
 

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderTransparentSurface.java

@@ -19,7 +19,7 @@
 package ru.windcorp.progressia.client.world.tile;
 
 import ru.windcorp.progressia.client.graphics.texture.Texture;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.RelFace;
 
 public class TileRenderTransparentSurface extends TileRenderSurface {
 
@@ -28,7 +28,7 @@ public class TileRenderTransparentSurface extends TileRenderSurface {
 	}
 
 	@Override
-	public boolean isOpaque(BlockFace face) {
+	public boolean isOpaque(RelFace face) {
 		return false;
 	}
 

src/main/java/ru/windcorp/progressia/common/collision/AABBRotator.java

@@ -0,0 +1,134 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.common.collision;
+
+import java.util.function.Supplier;
+
+import com.google.common.collect.ImmutableList;
+
+import glm.vec._3.Vec3;
+import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
+import ru.windcorp.progressia.common.world.rels.AxisRotations;
+
+public class AABBRotator implements AABBoid {
+	
+	private class AABBRotatorWall implements Wall {
+		
+		private final int id;
+
+		public AABBRotatorWall(int id) {
+			this.id = id;
+		}
+
+		@Override
+		public void getOrigin(Vec3 output) {
+			parent.getWall(id).getOrigin(output);
+			AxisRotations.resolve(output, upSupplier.get(), output);
+		}
+
+		@Override
+		public void getWidth(Vec3 output) {
+			parent.getWall(id).getWidth(output);
+			AxisRotations.resolve(output, upSupplier.get(), output);
+		}
+
+		@Override
+		public void getHeight(Vec3 output) {
+			parent.getWall(id).getHeight(output);
+			AxisRotations.resolve(output, upSupplier.get(), output);
+		}
+		
+	}
+	
+	private final Supplier<AbsFace> upSupplier;
+	private final Supplier<Vec3> hingeSupplier;
+	private final AABBoid parent;
+
+	private final AABBRotatorWall[] walls = new AABBRotatorWall[AbsFace.BLOCK_FACE_COUNT];
+	
+	{
+		for (int id = 0; id < walls.length; ++id) {
+			walls[id] = new AABBRotatorWall(id);
+		}
+	}
+
+	public AABBRotator(Supplier<AbsFace> upSupplier, Supplier<Vec3> hingeSupplier, AABBoid parent) {
+		this.upSupplier = upSupplier;
+		this.hingeSupplier = hingeSupplier;
+		this.parent = parent;
+	}
+
+	@Override
+	public void setOrigin(Vec3 origin) {
+		Vec3 relativeOrigin = Vectors.grab3();
+		Vec3 hinge = hingeSupplier.get();
+		
+		origin.sub(hinge, relativeOrigin);
+		AxisRotations.relativize(relativeOrigin, upSupplier.get(), relativeOrigin);
+		relativeOrigin.add(hinge);
+		
+		parent.setOrigin(relativeOrigin);
+		
+		Vectors.release(relativeOrigin);
+	}
+
+	@Override
+	public void moveOrigin(Vec3 displacement) {
+		parent.moveOrigin(displacement);
+	}
+
+	@Override
+	public void getOrigin(Vec3 output) {
+		parent.getOrigin(output);
+		Vec3 hinge = hingeSupplier.get();
+		
+		output.sub(hinge);
+		AxisRotations.resolve(output, upSupplier.get(), output);
+		output.add(hinge);
+	}
+
+	@Override
+	public void getSize(Vec3 output) {
+		parent.getSize(output);
+		AxisRotations.resolve(output, upSupplier.get(), output);
+		output.abs();
+	}
+
+	@Override
+	public Wall getWall(int faceId) {
+		return walls[faceId];
+	}
+	
+	public static CollisionModel rotate(Supplier<AbsFace> upSupplier, Supplier<Vec3> hingeSupplier, CollisionModel parent) {
+		if (parent instanceof AABBoid) {
+			return new AABBRotator(upSupplier, hingeSupplier, (AABBoid) parent);
+		} else if (parent instanceof CompoundCollisionModel) {
+			ImmutableList.Builder<CollisionModel> models = ImmutableList.builder();
+			
+			for (CollisionModel original : ((CompoundCollisionModel) parent).getModels()) {
+				models.add(rotate(upSupplier, hingeSupplier, original));
+			}
+			
+			return new CompoundCollisionModel(models.build());
+		} else {
+			throw new RuntimeException("not supported");
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/collision/AABBoid.java

@@ -19,7 +19,7 @@
 package ru.windcorp.progressia.common.collision;
 
 import glm.vec._3.Vec3;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
 
 public interface AABBoid extends CollisionModel {
 
@@ -27,7 +27,7 @@ public interface AABBoid extends CollisionModel {
 
 	void getSize(Vec3 output);
 
-	default Wall getWall(BlockFace face) {
+	default Wall getWall(AbsFace face) {
 		return getWall(face.getId());
 	}
 

src/main/java/ru/windcorp/progressia/common/collision/TranslatedAABB.java

@@ -20,7 +20,7 @@ package ru.windcorp.progressia.common.collision;
 
 import glm.vec._3.Vec3;
 import ru.windcorp.progressia.common.util.Vectors;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
 
 public class TranslatedAABB implements AABBoid {
 
@@ -51,7 +51,7 @@ public class TranslatedAABB implements AABBoid {
 	private AABBoid parent;
 	private final Vec3 translation = new Vec3();
 
-	private final TranslatedAABBWall[] walls = new TranslatedAABBWall[BlockFace.BLOCK_FACE_COUNT];
+	private final TranslatedAABBWall[] walls = new TranslatedAABBWall[AbsFace.BLOCK_FACE_COUNT];
 
 	{
 		for (int id = 0; id < walls.length; ++id) {

src/main/java/ru/windcorp/progressia/common/collision/WorldCollisionHelper.java

@@ -24,7 +24,7 @@ import java.util.Collection;
 import glm.vec._3.Vec3;
 import glm.vec._3.i.Vec3i;
 import ru.windcorp.progressia.common.util.LowOverheadCache;
-import ru.windcorp.progressia.common.world.WorldData;
+import ru.windcorp.progressia.common.world.DefaultWorldData;
 
 public class WorldCollisionHelper {
 
@@ -79,7 +79,7 @@ public class WorldCollisionHelper {
 	 *                    checked against
 	 * @param maxTime     maximum collision time
 	 */
-	public void tuneToCollideable(WorldData world, Collideable collideable, float maxTime) {
+	public void tuneToCollideable(DefaultWorldData world, Collideable collideable, float maxTime) {
 		activeBlockModels.forEach(blockModelCache::release);
 		activeBlockModels.clear();
 		CollisionPathComputer.forEveryBlockInCollisionPath(

src/main/java/ru/windcorp/progressia/common/collision/colliders/AABBoidCollider.java

@@ -25,7 +25,7 @@ import ru.windcorp.progressia.common.collision.colliders.Collider.ColliderWorksp
 import ru.windcorp.progressia.common.collision.colliders.Collider.Collision;
 import ru.windcorp.progressia.common.util.Matrices;
 import ru.windcorp.progressia.common.util.Vectors;
-import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.rels.AbsFace;
 
 class AABBoidCollider {
 
@@ -50,7 +50,7 @@ class AABBoidCollider {
 		computeCollisionVelocity(collisionVelocity, obstacleBody, colliderBody);
 
 		// For every wall of collision space
-		for (int i = 0; i < BlockFace.BLOCK_FACE_COUNT; ++i) {
+		for (int i = 0; i < AbsFace.BLOCK_FACE_COUNT; ++i) {
 			Wall wall = originCollisionSpace.getWall(i);
 
 			Collision collision = computeWallCollision(
@@ -122,46 +122,51 @@ class AABBoidCollider {
 		return output;
 	}
 
+	// @formatter:off
 	/*
-	 * Here we determine whether a collision has actually happened, and if it
+	 * Here we determine whether a collision has actually happened, and if it did, at what moment.
-	 * did, at what moment.
+	 * 
-	 * The basic idea is to compute the moment of collision and impact
+	 * The basic idea is to compute the moment of collision and impact coordinates in wall coordinate space.
-	 * coordinates in wall coordinate space.
+	 * Then, we can check impact coordinates to determine if we actually hit the wall or flew by and then
-	 * Then, we can check impact coordinates to determine if we actually hit the
+	 * check time to make sure the collision is not too far in the future and not in the past.
-	 * wall or flew by and then
+	 * 
-	 * check time to make sure the collision is not too far in the future and
-	 * not in the past.
 	 * DETAILED EXPLANATION:
-	 * Consider a surface defined by an origin r_wall and two noncollinear
+	 * 
-	 * nonzero vectors w and h.
+	 * Consider a surface defined by an origin r_wall and two noncollinear nonzero vectors w and h.
 	 * Consider a line defined by an origin r_line and a nonzero vector v.
+	 * 
 	 * Then, a collision occurs if there exist x, y and t such that
-	 * ______ _
+	 *   ______   _
-	 * r_line + v * t
+	 *   r_line + v * t
+	 *   
 	 * and
-	 * ______ _ _
+	 *   ______   _       _
-	 * r_wall + w * x + h * y
+	 *   r_wall + w * x + h * y
-	 * describe the same location (indeed, this corresponds to a collision at
+	 *   
-	 * moment t0 + t
+	 * describe the same location (indeed, this corresponds to a collision at moment t0 + t
-	 * with a point on the wall with coordinates (x; y) in (w; h) coordinate
+	 * with a point on the wall with coordinates (x; y) in (w; h) coordinate system).
-	 * system).
+	 * 
 	 * Therefore,
-	 * ______ _ ______ _ _
+	 *   ______   _     ______   _     _
-	 * r_line + v*t = r_wall + w*x + h*y;
+	 *   r_line + v*t = r_wall + w*x + h*y;
-	 * _ ⎡w_x h_x -v_x⎤ ⎡x⎤ _ ______ ______
+	 *   
-	 * r = ⎢w_y h_y -v_y⎥ * ⎢y⎥, where r = r_line - r_wall;
+	 *   _   ⎡w_x  h_x  -v_x⎤   ⎡x⎤        _   ______   ______
-	 * ⎣w_z h_z -v_z⎦ ⎣t⎦
+	 *   r = ⎢w_y  h_y  -v_y⎥ * ⎢y⎥, where r = r_line - r_wall;
-	 * ⎡x⎤ ⎡w_x h_x -v_x⎤ -1 _
+	 *       ⎣w_z  h_z  -v_z⎦   ⎣t⎦
-	 * ⎢y⎥ = ⎢w_y h_y -v_y⎥ * r, if the matrix is invertible.
+	 *       
-	 * ⎣t⎦ ⎣w_z h_z -v_z⎦
+	 *   ⎡x⎤   ⎡w_x  h_x  -v_x⎤ -1   _
+	 *   ⎢y⎥ = ⎢w_y  h_y  -v_y⎥    * r, if the matrix is invertible.
+	 *   ⎣t⎦   ⎣w_z  h_z  -v_z⎦
+	 * 
 	 * Then, one only needs to ensure that:
-	 * 0 < x < 1,
+	 *   0 < x < 1,
-	 * 0 < y < 1, and
+	 *   0 < y < 1, and
-	 * 0 < t < T, where T is remaining tick time.
+	 *   0 < t < T, where T is remaining tick time.
-	 * If the matrix is not invertible or any of the conditions are not met, no
+	 * 
-	 * collision happened.
+	 * If the matrix is not invertible or any of the conditions are not met, no collision happened.
 	 * If all conditions are satisfied, then the moment of impact is t0 + t.
 	 */
+	// @formatter:on
 	private static Collision computeWallCollision(
 		Wall obstacleWall,
 		AABBoid colliderModel,

src/main/java/ru/windcorp/progressia/common/collision/colliders/Collider.java

@@ -27,7 +27,7 @@ import glm.vec._3.Vec3;
 import ru.windcorp.progressia.common.collision.*;
 import ru.windcorp.progressia.common.util.LowOverheadCache;
 import ru.windcorp.progressia.common.util.Vectors;
-import ru.windcorp.progressia.common.world.WorldData;
+import ru.windcorp.progressia.common.world.DefaultWorldData;
 
 public class Collider {
 
@@ -36,7 +36,7 @@ public class Collider {
 	/**
 	 * Dear Princess Celestia,
 	 * <p>
-	 * When {@linkplain #advanceTime(Collection, Collision, WorldData, float)
+	 * When {@linkplain #advanceTime(Collection, Collision, DefaultWorldData, float)
 	 * advancing time},
 	 * time step for all entities <em>except</em> currently colliding bodies is
 	 * the current
@@ -61,7 +61,7 @@ public class Collider {
 
 	public static void performCollisions(
 		List<? extends Collideable> colls,
-		WorldData world,
+		DefaultWorldData world,
 		float tickLength,
 		ColliderWorkspace workspace
 	) {
@@ -96,7 +96,7 @@ public class Collider {
 	private static Collision getFirstCollision(
 		List<? extends Collideable> colls,
 		float tickLength,
-		WorldData world,
+		DefaultWorldData world,
 		ColliderWorkspace workspace
 	) {
 		Collision result = null;
@@ -126,7 +126,7 @@ public class Collider {
 	private static void tuneWorldCollisionHelper(
 		Collideable coll,
 		float tickLength,
-		WorldData world,
+		DefaultWorldData world,
 		ColliderWorkspace workspace
 	) {
 		WorldCollisionHelper wch = workspace.worldCollisionHelper;
@@ -194,7 +194,7 @@ public class Collider {
 		Collision collision,
 
 		Collection<? extends Collideable> colls,
-		WorldData world,
+		DefaultWorldData world,
 		float tickLength,
 		ColliderWorkspace workspace
 	) {
@@ -212,66 +212,72 @@ public class Collider {
 		handlePhysics(collision);
 	}
 
+	// @formatter:off
 	/*
 	 * Here we compute the change in body velocities due to a collision.
+	 * 
 	 * We make the following simplifications:
-	 * 1) The bodies are perfectly rigid;
+	 *   1)  The bodies are perfectly rigid;
-	 * 2) The collision is perfectly inelastic
+	 *   2)  The collision is perfectly inelastic
-	 * (no bouncing);
+	 *       (no bouncing);
-	 * 3) The bodies are spherical;
+	 *   3)  The bodies are spherical;
-	 * 4) No tangential friction exists
+	 *   4)  No tangential friction exists
-	 * (bodies do not experience friction when sliding against each other);
+	 *       (bodies do not experience friction when sliding against each other);
-	 * 5) Velocities are not relativistic.
+	 *   5)  Velocities are not relativistic.
+	 *   
 	 * Angular momentum is ignored per 3) and 4),
-	 * e.g. when something pushes an end of a long stick, the stick does not
+	 * e.g. when something pushes an end of a long stick, the stick does not rotate.
-	 * rotate.
+	 * 
 	 * DETAILED EXPLANATION:
-	 * Two spherical (sic) bodies, a and b, experience a perfectly inelastic
+	 * 
-	 * collision
+	 * Two spherical (sic) bodies, a and b, experience a perfectly inelastic collision
 	 * along a unit vector
-	 * _ _ _ _ _
+	 *   _    _   _      _   _
-	 * n = (w ⨯ h) / (|w ⨯ h|),
+	 *   n = (w ⨯ h) / (|w ⨯ h|),
-	 * _ _
+	 *       _     _
 	 * where w and h are two noncollinear nonzero vectors on the dividing plane.
-	 * ___ ___
+	 *                                             ___  ___
 	 * Body masses and velocities are M_a, M_b and v_a, v_b, respectively.
-	 * ___ ___
+	 *                                            ___     ___
 	 * After the collision desired velocities are u_a and u_b, respectively.
-	 * _
+	 *                                                                          _
-	 * (Notation convention: suffix 'n' denotes a vector projection onto vector
+	 * (Notation convention: suffix 'n' denotes a vector projection onto vector n,
-	 * n,
 	 * and suffix 't' denotes a vector projection onto the dividing plane.)
-	 * Consider the law of conservation of momentum for axis n and the dividing
+	 * 
-	 * plane:
+	 * Consider the law of conservation of momentum for axis n and the dividing plane:
-	 * ____________ ____________ ________________
+	 *        ____________   ____________   ________________
-	 * n: ⎧ p_a_before_n + p_b_before_n = p_common_after_n;
+	 *   n: ⎧ p_a_before_n + p_b_before_n = p_common_after_n;
-	 * ⎨ ___________ ____________
+	 *      ⎨ ___________   ____________
-	 * t: ⎩ p_i_after_t = p_i_before_t for any i in {a, b}.
+	 *   t: ⎩ p_i_after_t = p_i_before_t    for any i in {a, b}.
+	 *   
 	 * Expressing all p_* in given terms:
-	 * ___ _ ___ _ ___ ___ ____ ____
+	 *               ___   _           ___   _                  ___           ___   ____   ____
-	 * n: ⎧ M_a * (v_a ⋅ n) + M_b * (v_b ⋅ n) = (M_a + M_b) * u_n, where u_n ≡
+	 *   n: ⎧ M_a * (v_a ⋅ n) + M_b * (v_b ⋅ n) = (M_a + M_b) * u_n,    where u_n ≡ u_an = u_bn;
-	 * u_an = u_bn;
+	 *      ⎨ ____   ___   _    ___   _
-	 * ⎨ ____ ___ _ ___ _
+	 *   t: ⎩ u_it = v_i - n * (v_i ⋅ n)                                for any i in {a, b}.
-	 * t: ⎩ u_it = v_i - n * (v_i ⋅ n) for any i in {a, b}.
+	 *   
 	 * Therefore:
-	 * ___ _ ___ _ ___ _
+	 *   ___   _                       ___   _                       ___   _
-	 * u_n = n * ( M_a/(M_a + M_b) * v_a ⋅ n + M_b/(M_a + M_b) * v_b ⋅ n );
+	 *   u_n = n * ( M_a/(M_a + M_b) * v_a ⋅ n  +  M_b/(M_a + M_b) * v_b ⋅ n );
+	 * 
 	 * or, equivalently,
-	 * ___ _ ___ _ ___ _
+	 *   ___   _           ___   _           ___   _
-	 * u_n = n * ( m_a * v_a ⋅ n + m_b * v_b ⋅ n ),
+	 *   u_n = n * ( m_a * v_a ⋅ n  +  m_b * v_b ⋅ n ),
+	 * 
 	 * where m_a and m_b are relative masses (see below).
+	 * 
 	 * Finally,
-	 * ___ ____ ___
+	 *   ___   ____   ___
-	 * u_i = u_it + u_n for any i in {a, b}.
+	 *   u_i = u_it + u_n    for any i in {a, b}.
-	 * The usage of relative masses m_i permits a convenient generalization of
+	 *   
-	 * the algorithm
+	 * The usage of relative masses m_i permits a convenient generalization of the algorithm
-	 * for infinite masses, signifying masses "significantly greater" than
+	 * for infinite masses, signifying masses "significantly greater" than finite masses:
-	 * finite masses:
+	 * 
-	 * 1) If both M_a and M_b are finite, let m_i = M_i / (M_a + M_b) for any i
+	 *   1)  If both M_a and M_b are finite,       let m_i = M_i / (M_a + M_b)    for any i in {a, b}.
-	 * in {a, b}.
+	 *   2)  If M_i is finite but M_j is infinite, let m_i = 0 and m_j = 1.
-	 * 2) If M_i is finite but M_j is infinite, let m_i = 0 and m_j = 1.
+	 *   3)  If both M_a and M_b are infinite,     let m_i = 1/2                  for any i in {a, b}.
-	 * 3) If both M_a and M_b are infinite, let m_i = 1/2 for any i in {a, b}.
 	 */
+	// @formatter:on
 	private static void handlePhysics(Collision collision) {
 		// Fuck JGLM
 		Vec3 n = Vectors.grab3();
@@ -355,7 +361,7 @@ public class Collider {
 	private static void advanceTime(
 		Collection<? extends Collideable> colls,
 		Collision exceptions,
-		WorldData world,
+		DefaultWorldData world,
 		float step
 	) {
 		world.advanceTime(step);

src/main/java/ru/windcorp/progressia/common/comms/CommsChannel.java

@@ -22,6 +22,7 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.List;
 
 import ru.windcorp.progressia.common.comms.packets.Packet;
 
@@ -53,6 +54,8 @@ public abstract class CommsChannel {
 	private State state = State.CONNECTING;
 
 	private final Collection<CommsListener> listeners = Collections.synchronizedCollection(new ArrayList<>());
+	
+	private final List<Packet> pendingPackets = Collections.synchronizedList(new ArrayList<>());
 
 	protected abstract void doSendPacket(Packet packet) throws IOException;
 
@@ -101,8 +104,19 @@ public abstract class CommsChannel {
 	public abstract void disconnect();
 
 	protected void onPacketReceived(Packet packet) {
+		pendingPackets.add(packet);
+	}
+
+	protected void forwardPacketToListeners(Packet packet) {
 		listeners.forEach(l -> l.onPacketReceived(packet));
 	}
+	
+	public void processPackets() {
+		synchronized (pendingPackets) {
+			pendingPackets.forEach(this::forwardPacketToListeners);
+			pendingPackets.clear();
+		}
+	}
 
 	public void addListener(CommsListener listener) {
 		listeners.add(listener);

src/main/java/ru/windcorp/progressia/common/hacks/GuavaEventBusHijacker.java

@@ -15,7 +15,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+
 package ru.windcorp.progressia.common.hacks;
 
 import java.lang.reflect.Constructor;
@@ -29,15 +29,14 @@ import com.google.common.util.concurrent.MoreExecutors;
 import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 /**
- * This class had to be written because there is not legal way to instantiate a
+ * This class had to be written because there is no legal way to instantiate a
- * non-async
+ * non-async {@link EventBus} with both a custom identifier and a custom
- * {@link EventBus} with both a custom identifier and a custom exception
+ * exception handler. Which is a shame. Guava maintainers know about the issue
- * handler. Which
+ * but have rejected solutions multiple times <em>without a clearly stated
- * is a shame. Guava maintainers know about the issue but have rejected
+ * reason</em>; looks like some dirty reflection will have to do.
- * solutions multiple
+ * <p>
- * times <em>without a clearly stated reason</em>; looks like some dirty
+ * When explicitly referencing this class, please mention its usage in
- * reflection will
+ * implementation notes because it is unreliable long-term.
- * have to do.
  * 
  * @author javapony
  */

src/main/java/ru/windcorp/progressia/common/resource/ClasspathResourceReader.java

@@ -15,16 +15,17 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+package ru.windcorp.progressia.common.resource;
-package ru.windcorp.progressia.server.world.tile;
 
-import ru.windcorp.progressia.common.world.generic.GenericTileStack;
+import java.io.InputStream;
-import ru.windcorp.progressia.common.world.tile.TileDataStack;
-import ru.windcorp.progressia.server.world.ChunkLogic;
 
-public abstract class TileLogicStack
+import ru.windcorp.progressia.Progressia;
-	extends GenericTileStack<TileLogicStack, TileLogic, ChunkLogic> {
 
-	public abstract TileDataStack getData();
+public class ClasspathResourceReader implements ResourceReader {
+
+	@Override
+	public InputStream read(String name) {
+		return Progressia.class.getClassLoader().getResourceAsStream(name);
+	}
 
 }

src/main/java/ru/windcorp/progressia/common/resource/FilesystemResourceReader.java

@@ -0,0 +1,36 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.common.resource;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+public class FilesystemResourceReader implements ResourceReader {
+
+	@Override
+	public InputStream read(String name) {
+		try {
+			return Files.newInputStream(Paths.get(name));
+		} catch (IOException e) {
+			return null;
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/resource/Resource.java

@@ -30,19 +30,24 @@ import org.lwjgl.BufferUtils;
 import com.google.common.io.ByteStreams;
 import com.google.common.io.CharStreams;
 
-import ru.windcorp.progressia.Progressia;
 import ru.windcorp.progressia.common.util.Named;
 import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class Resource extends Named {
+	
+	private final ResourceReader resourceReader;
 
-	public Resource(String name) {
+	public Resource(String name, ResourceReader resourceReader) {
 		super(name);
+		this.resourceReader = resourceReader;
 	}
 
 	public InputStream getInputStream() {
-		// TODO Do proper resource lookup
+		return getResourceReader().read(getName());
-		return Progressia.class.getClassLoader().getResourceAsStream(getName());
+	}
+	
+	public ResourceReader getResourceReader() {
+		return resourceReader;
 	}
 
 	public Reader getReader() {

src/main/java/ru/windcorp/progressia/common/resource/ResourceManager.java

@@ -19,9 +19,16 @@
 package ru.windcorp.progressia.common.resource;
 
 public class ResourceManager {
+	
+	private static final ResourceReader CLASSPATH_READER = new ClasspathResourceReader();
+	private static final ResourceReader FILESYSTEM_READER = new FilesystemResourceReader();
 
 	public static Resource getResource(String name) {
-		return new Resource(name);
+		return new Resource(name, CLASSPATH_READER);
+	}
+	
+	public static Resource getFileResource(String name) {
+		return new Resource(name, FILESYSTEM_READER);
 	}
 
 	public static Resource getTextureResource(String name) {

src/main/java/ru/windcorp/progressia/common/resource/ResourceReader.java

@@ -0,0 +1,26 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.common.resource;
+
+import java.io.InputStream;
+
+public interface ResourceReader {
+	
+	InputStream read(String name);
+
+}

src/main/java/ru/windcorp/progressia/common/state/StateChange.java

@@ -16,7 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
  
-package ru.windcorp.progressia.server.world.tasks;
+package ru.windcorp.progressia.common.state;
 
 @FunctionalInterface
 public interface StateChange<T> {