Made inventory windows draggable

If I ever become a supervillain, I will torture my victims by forcing
them to merge branches in Progressia

Does not work properly, waiting for an additional patch from master

.gitattributes

@@ -6,4 +6,4 @@
 *               text=auto eol=lf
 
 *.bat           text eol=crlf
-*.nsi           text eol=crlf
+

build.gradle

@@ -1,29 +1,23 @@
 /*
- * Build logic for Progressia
+ * build.gradle for Progressia
- * build.gradle
- * 
- * Please refer to
- * 
- *     docs/building/BuildScriptReference.md
- *     
- * for user reference.
  */
 
 plugins {
-	id 'java'
+	// Apply the java-library plugin to add support for Java Library
-	
+	id 'java-library'
-	// GrGit
+
-	//   A JGit wrapper for Groovy used to access git commit info
+	/*
-	id 'org.ajoberstar.grgit' version '4.1.1'
+	 * Uncomment the following line to enable the Eclipse plugin.
+	 * This is only necessary if you don't use Buildship plugin from the IDE
+	 */
+	//id 'eclipse'
 }
 
-
-
-/*
- * Configure Java version
- */
-
 java {
+	/*
+	 * We're Java 8 for now.
+	 * Why? As of 2020, most users have Oracle Java, which only supports Java 8.
+	 */
 	sourceCompatibility = JavaVersion.VERSION_1_8
 	targetCompatibility = JavaVersion.VERSION_1_8
 }
@@ -40,8 +34,6 @@ compileJava {
 	}
 }
 
-
-
 /*
  * Dependencies
  */
@@ -50,7 +42,7 @@ repositories {
 	mavenCentral()
 
 	/*
-	 * Windcorp Maven repository
+	 * Specify Windcorp Maven repository
 	 * Currently used by:
 	 *   - ru.windcorp.fork.io.github.java-graphics:glm:1.0.1
 	 */
@@ -80,308 +72,230 @@ dependencies {
 	//   A unit-testing library
 	testImplementation 'junit:junit:4.13.2'
 
-	// Also see LWJGL dependencies in build_logic/lwjgl.gradle
+	// See LWJGL dependencies below
 }
 
-
-
 /*
- * Version resolution
+ * Progressia uses the following LWJGL libraries:
+ *   - Core libraries
+ *   - OpenGL
+ *   - OpenAL
+ *   - GLFW
+ *   - STB
  */
 
-import org.ajoberstar.grgit.*
+/*
+ *          LWJGL
+ * (auto-generated script)
+ *   ((here be dragons))
+ */
 
-// Pattern: vMAJOR.MINOR.PATCH[-SUFFIX]
+import org.gradle.internal.os.OperatingSystem
-project.ext.tagFormat = /^v(\d+)\.(\d+)\.(\d+)(-[\w\-]*)?$/
 
-String version_parseVersion(String tag, boolean increment) {
+project.ext.lwjglVersion = "3.2.3"
-	try {
+
-	
+switch (OperatingSystem.current()) {
-		def data = (tag =~ tagFormat)[0]
+	case OperatingSystem.LINUX:
-		
+		def osArch = System.getProperty("os.arch")
-		def major = data[1]
+		project.ext.lwjglNatives = osArch.startsWith("arm") || osArch.startsWith("aarch64")
-		def minor = data[2]
+				? "natives-linux-${osArch.contains("64") || osArch.startsWith("armv8") ? "arm64" : "arm32"}"
-		def patch = data[3] as int
+				: "natives-linux"
-		def suffix = data[4] ?: ''
+		break
-		
+	case OperatingSystem.MAC_OS:
-		if (increment) {
+		project.ext.lwjglNatives = "natives-macos"
-			def oldVersion = "$major.$minor.$patch$suffix"
+		break
-			patch++
+	case OperatingSystem.WINDOWS:
-			def newVersion = "$major.$minor.$patch$suffix"
+		project.ext.lwjglNatives = System.getProperty("os.arch").contains("64") ? "natives-windows" : "natives-windows-x86"
-			
+		break
-			logger.info "Version parsed from Git: $oldVersion, incremented to $newVersion"
-			return newVersion
-		} else {
-			def newVersion = "$major.$minor.$patch$suffix"
-			logger.info "Version parsed from Git: $newVersion"
-			return newVersion
-		}
-		
-	} catch (any) {
-		logger.warn "Could not parse version from tag \"$tag\""
-		return tag
-	}
 }
 
-Tag version_findRelevantTag(Grgit git) {
+dependencies {
-	def tags = git.tag.list()
+	implementation platform("org.lwjgl:lwjgl-bom:$lwjglVersion")
-	
+
-	def commits = [ git.head() ]
+	implementation "org.lwjgl:lwjgl"
-	def visited = new HashSet<>()
+	implementation "org.lwjgl:lwjgl-glfw"
-	
+	implementation "org.lwjgl:lwjgl-openal"
-	while (true) {
+	implementation "org.lwjgl:lwjgl-opengl"
-		if (commits.isEmpty()) return null
+	implementation "org.lwjgl:lwjgl-stb"
-	
+
-		def nextCommits = new HashSet<>()
+	runtimeOnly "org.lwjgl:lwjgl::$lwjglNatives"
-		
+	runtimeOnly "org.lwjgl:lwjgl-glfw::$lwjglNatives"
-		def formatSpecificationPrinted = false
+	runtimeOnly "org.lwjgl:lwjgl-openal::$lwjglNatives"
-		for (def commit : commits) {
+	runtimeOnly "org.lwjgl:lwjgl-opengl::$lwjglNatives"
-			def tag = tags.findAll { it.commit == commit } ?.max { it.dateTime }
+	runtimeOnly "org.lwjgl:lwjgl-stb::$lwjglNatives"
-			
+}
-			if (tag != null) {
+
-				if (tag.name ==~ tagFormat) {
+// LWJGL END
-					return tag
+
-				} else {
+/*
-					if (!formatSpecificationPrinted) {
+ * Tasks
-						formatSpecificationPrinted = true
+ */
-						logger.info 'Expecting tag format: vMAJOR.MINOR.PATCH[-SUFFIX]'
+
-					}
+/*
-					logger.info 'Ignoring tag due to invalid format: {}', tag.name
+ * Additional native libraries specification
-				}
+ */
+
+project.ext.platforms = new HashSet<>()
+
+task addNativeDependencies {
+	doFirst {
+		def archs = project.ext.platforms
+
+		switch (archs.size()) {
+			case 0:
+				println "Adding LWJGL native dependencies for local platform only:\n\t$lwjglNatives"
+				archs.add project.ext.lwjglNatives
+				break
+			case 1:
+				println "Adding LWJGL native dependencies for platform\n\t" + archs.get(0)
+				break
+			default:
+				println "Adding LWJGL native dependencies for platforms:\n\t" + archs.join("\n\t")
+		}
+
+		if (project.ext.lwjglNatives.isEmpty()) println "WTF"
+
+		dependencies {
+			archs.each { arch ->
+				runtimeOnly "org.lwjgl:lwjgl::$arch"
+				runtimeOnly "org.lwjgl:lwjgl-glfw::$arch"
+				runtimeOnly "org.lwjgl:lwjgl-openal::$arch"
+				runtimeOnly "org.lwjgl:lwjgl-opengl::$arch"
+				runtimeOnly "org.lwjgl:lwjgl-stb::$arch"
 			}
-			
-			nextCommits.addAll commit.parentIds.collect(git.resolve.&toCommit)
 		}
-		
-		visited.addAll commits
-		nextCommits.removeAll visited
-		commits = nextCommits
 	}
 }
 
-task resolveVersion {
+compileJava.mustRunAfter addNativeDependencies // Make sure runtimeOnly has not been resolved
-	description 'Resolves version information from Git repository or project properties.'
+
+task requestLinuxDependencies {
+	description 'Adds linux, linux-arm64 and linux-arm32 native libraries to built artifacts.'
+	doFirst {
+		project.ext.platforms.addAll([
+			'natives-linux',
+			'natives-linux-arm64',
+			'natives-linux-arm32'
+		])
+	}
+}
+task requestWindowsDependencies {
+	description 'Adds windows and windows-x86 native libraries to built artifacts.'
+	doFirst {
+		project.ext.platforms.addAll([
+			'natives-windows',
+			'natives-windows-x86'
+		])
+	}
+}
+task requestMacOSDependencies {
+	description 'Adds macos native libraries to built artifacts.'
+	doFirst {
+		project.ext.platforms.addAll(['natives-macos'])
+	}
+}
+
+def dependencySpecificationTasks = tasks.findAll { task -> task.name.startsWith('request') && task.name.endsWith('Dependencies') }
+
+task requestCrossPlatformDependencies {
+	description 'Adds native libraries for all available platforms to built artifacts.'
+	dependsOn dependencySpecificationTasks
+}
+
+addNativeDependencies.mustRunAfter dependencySpecificationTasks
+
+/*
+ * Determines if the provided dependency should be packaged
+ */
+def isDependencyRequested(String dep) {
+	if (dep.endsWith(".jar")) {
+		dep = dep.substring(0, dep.length() - ".jar".length())
+	}
+
+	return !dep.contains("natives-") ||
+			project.ext.platforms.contains(dep.substring(dep.indexOf("natives-"), dep.length()))
+}
+
+/*
+ * Manifest specification
+ */
+
+task specifyLocalManifest {
+	dependsOn addNativeDependencies // Make sure all native dependencies are specified
 
 	doFirst {
-		try {
+		def classPath = []
-			def git = Grgit.open(dir: project.projectDir)
+
-			
+		configurations.runtimeClasspath.each {
-			project.ext.commit = git.head().id
+			if (isDependencyRequested(it.getName())) {
-			project.ext.branch = git.branch.current().name
+				classPath.add("lib/" + it.getName())
-			
-			if (project.version != 'unspecified') {
-				// Leave version as-is
-				return
-			}
-			
-			def tag = version_findRelevantTag(git)
-			if (tag == null) {
-			
-				String suffix
-				if (project.hasProperty('buildId')) {
-					suffix = project.buildId;
-				} else {
-					suffix = java.time.ZonedDateTime.now().format(java.time.format.DateTimeFormatter.ofPattern('yyyy_MM_dd'))
-				}
-				project.version = "999.0.0-$suffix"
-			
-				logger.warn 'Git repository does not contain an applicable tag, using dummy version {}\nSpecify version with -Pversion=1.2.3 or create a Git tag named v1.2.3', project.version
-				
 			} else {
-			
+				println "\tRemoving from JAR classpath (not requested):  " + it.getName()
-				project.version = version_parseVersion(tag.name, tag.commit != git.head())
-				
 			}
-		} catch (org.eclipse.jgit.errors.RepositoryNotFoundException e) {
-			if (project.version == 'unspecified') project.version = 'dev'
-			project.ext.commit = '-'
-			project.ext.branch = '-'
-		
-			logger.warn 'No Git repository found in project root, using dummy version {}\nSpecify version with -Pversion=1.2.3 or create a Git tag named v1.2.3', project.version
 		}
-	}
+
-	
+		if (classPath.size() == configurations.runtimeClasspath.size()) {
-	doLast {
+			println "Nothing removed from JAR classpath"
-		if (!project.hasProperty('buildId')) {
+		}
-			project.ext.buildId = '-'
+
+		jar {
+			manifest {
+				attributes(
+						"Main-Class": "ru.windcorp.progressia.client.ProgressiaClientMain",
+						"Class-Path": configurations.runtimeClasspath.collect { "lib/" + it.getName() } .findAll { isDependencyRequested(it) } .join(' ')
+						)
+			}
 		}
 	}
 }
 
-
+jar.dependsOn specifyLocalManifest
 
 /*
- * Configure JAR manifest
+ * Library export
- */
-
-task configureManifest {
-	description 'Populates JAR manifest with Main-Class, Class-Path and version metadata.'
-
-	jar.dependsOn configureManifest
-	dependsOn resolveVersion
-
-	doFirst {
-		jar.manifest.attributes(
-			'Main-Class':                        'ru.windcorp.progressia.client.ProgressiaClientMain',
-			'Class-Path':                        configurations.runtimeClasspath.collect { "lib/${it.name}" } .join(' '),
-			
-			'Specification-Title':               'Progressia',
-			
-			'Implementation-Title':              'Progressia',
-			'Implementation-Version':            project.version,
-			'Implementation-Version-Git-Commit': project.commit,
-			'Implementation-Version-Git-Branch': project.branch,
-			'Implementation-Version-BuildId':    project.buildId,
-		)
-	}
-}
-
-
-
-/*
- * Copy libraries into buil/libs/lib directory, next to Progressia.jar
  */
 
 task exportLibs(type: Sync) {
-	description 'Copies runtime libraries into a subdirectory next to the output JAR.'
+	mustRunAfter addNativeDependencies
-	
-	jar.dependsOn exportLibs
 
+	into libsDirectory.get().getAsFile().getPath() + "/lib"
+	exclude { !isDependencyRequested(it.getName()) }
 	from configurations.runtimeClasspath
-	into 'build/libs/lib'
 }
 
-
+jar.dependsOn(exportLibs)
 
 /*
- * Apply LWJGL logic
+ * Packaging
- */
-apply from: 'build_logic/lwjgl.gradle'
-
-
-
-/*
- * Packaging working directory configuration
  */
 
-import java.nio.file.*
+task packageDebian(type: Exec) {
-import java.nio.file.attribute.*
+	description 'Builds the project and creates a Debain package.'
+	group 'Progressia'
+
+	dependsOn build
+	dependsOn requestLinuxDependencies
+
+	commandLine './buildPackages.sh', 'debian'
 
-task createPackagingDirs() {
-	description 'Resets build/tmp/packaging directory.'
-	
 	doLast {
-		def tmpDir = buildDir.toPath().resolve 'tmp/packaging'
+		println "Debian package available in build_packages/"
-
-		def nuke = new SimpleFileVisitor<Path>() {
-			@Override
-			public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-				Files.delete(file);
-				return FileVisitResult.CONTINUE;
-			}
-			@Override
-			public FileVisitResult postVisitDirectory(Path dir, IOException e) throws IOException {
-				if (e == null) {
-					Files.delete(dir);
-					return FileVisitResult.CONTINUE;
-				} else {
-					// directory iteration failed
-					throw e;
-				}
-			}
-		}
-		
-		// Fckn nuke tmpDir from orbit
-		// I'm so done with deleting file trees in Java/Groovy/whatever
-		// ...Not using File.deleteDir() because the latter recurses into symlinks, and we don't want to wipe build/libs/lib
-		if (Files.exists(tmpDir)) {
-			Files.walkFileTree tmpDir, nuke
-		}
-		
-        Files.createDirectories tmpDir.resolve('workingDir')
-        Files.createDirectories buildDir.toPath().resolve('packages')
-    }
-}
-
-task linkBuildOutputForPackaging() {
-	description 'Symlinks the contents of build/libs into packaging working directory.'
-	
-    dependsOn build
-    dependsOn createPackagingDirs
-    
-    onlyIf { preparePackaging.ext.mode == 'symlink' }
-    
-    doLast {
-        def from = buildDir.toPath().resolve 'libs'
-		def into = buildDir.toPath().resolve "tmp/packaging/workingDir/${preparePackaging.ext.buildDest}"
-		
-        Files.createDirectories into
-        
-        Files.list(from).each {
-			def fileName = it.fileName.toString()
-			
-			// Exclude all JARs except the current one
-			if (fileName ==~ "${project.name}.*\\.jar" && fileName != tasks.jar.archiveFileName.get())
-				return
-        
-            Files.createSymbolicLink into.resolve(it.fileName), it
-        }
-    }
-}
-
-task copyBuildOutputForPackaging(type: Copy) {
-	description 'Copies the contents of build/libs into packaging working directory.'
-
-    dependsOn build
-    dependsOn createPackagingDirs
-    
-    onlyIf { preparePackaging.ext.mode == 'copy' }
-    
-    from 'build/libs'
-    filesMatching("${project.name}*.jar") {
-		include tasks.jar.archiveFileName.get()
-    }
-    into "build/tmp/packaging/workingDir/${ -> preparePackaging.ext.buildDest}"
-}
-
-task preparePackaging {
-	preparePackaging.ext.buildDest = ''
-	preparePackaging.ext.mode = 'symlink'
-	
-	dependsOn createPackagingDirs
-	dependsOn linkBuildOutputForPackaging
-	dependsOn copyBuildOutputForPackaging
-}
-
-
-
-/*
- * Apply all packaging scripts
- */
-
-new File(projectDir, 'build_logic/packaging').list().each {
-    apply from: "build_logic/packaging/$it/script.gradle"
-}
-
-
-
-/*
- * Ensure no more than one packaging task is scheduled
- */
- 
-gradle.taskGraph.whenReady { graph ->
-	if (graph.allTasks.count { it.name ==~ /package[^_]*/ } > 1) {
-		def offenders = graph.allTasks.findAll { it.name ==~ /package[^_]*/ }
-		throw new GradleException("Cannot execute multiple package tasks within a single build\n" +
-			"\tOffending tasks: $offenders")
 	}
 }
 
+task packageWindows(type: Exec) {
+	description 'Builds the project and creates a Windows installer.'
+	group 'Progressia'
 
+	dependsOn build
+	dependsOn requestWindowsDependencies
 
-/*
+	commandLine './buildPackages.sh', 'windows'
- * Convenience build tasks
+
- */
+	doLast {
+		println "Windows installer available in build_packages/"
+	}
+}
 
 task buildCrossPlatform {
 	description 'Builds the project including native libraries for all available platforms.'
@@ -391,17 +305,17 @@ task buildCrossPlatform {
 	dependsOn build
 
 	doLast {
-		logger.info 'Native libraries for all platforms have been added'
+		println "Native libraries for all platforms have been added"
 	}
 }
 
 task buildLocal {
-	description "Builds the project including only native libraries for current platform (${lwjgl.localArch})."
+	description "Builds the project including only native libraries for current platform ($lwjglNatives)."
 	group 'Progressia'
 
 	dependsOn build
 
 	doLast {
-		logger.info "Native libraries only for platform ${lwjgl.localArch} have been added"
+		println "Native libraries only for platform $lwjglNatives have been added"
 	}
 }

buildPackages.sh

@@ -0,0 +1,191 @@
+#!/bin/bash
+
+#
+# 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/>.
+#
+
+echoerr() { echo "$@" 1>&2; }
+
+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"
+        else
+            echoerr "Command $item not found, cannot package"
+            exit 100
+        fi
+    done
+
+    for file in $requiredFiles; do
+        if ! [ -r "$file" ]; then
+            echoerr "$file is missing or not readable, cannot package"
+            exit 101
+        else
+            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"                  &&
+        cp -r 'build/libs/lib'            "$shareDir/lib"            &&
+        cp    'build/libs/Progressia.jar' "$shareDir/Progressia.jar" &&
+        echo "------ DPKG-DEB ------"                                &&
+        fakeroot dpkg-deb --build "$tmpDir"                          &&
+        echo "---- DPKG-DEB END ----"                                &&
+        mv "$outputFile" build_packages
+    } || {
+        echoerr "Could not create Debian package"
+        exitCode=1
+    }
+
+    {
+        if [ -d "$tmpDir" ]; then
+            rm -r "$tmpDir"
+        fi
+        echo "Cleaned up"
+    } || {
+        echoerr "Could not clean up after packaging Debian package"
+        exitCode=2
+    }
+
+    exit "$exitCode"
+}
+
+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"
+        else
+            echoerr "Command $item not found, cannot build"
+            exit 100
+        fi
+    done
+
+    if ! [ -r "$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 ----"                                              &&
+        mv "$outputFile" build_packages
+    } || {
+        echoerr "Could not build Windows installer"
+        exitCode=1
+    }
+
+    {
+        if [ -d 'build_packages/NSIS/lib' ]; then
+            rm -r 'build_packages/NSIS/lib'
+        fi
+        if [ -e 'build_packages/NSIS/Progressia.jar' ]; then
+            rm 'build_packages/NSIS/Progressia.jar'
+        fi
+        if [ -e 'build_packages/NSIS/LICENSE.txt' ]; then
+            rm 'build_packages/NSIS/LICENSE.txt'
+        fi
+        echo "Cleaned up"
+    } || {
+        echoerr "Could not clean up after building Windows installer"
+        exitCode=2
+    }
+
+    exit "$exitCode"
+}
+
+printUsage() {
+    echoerr "Usage: $0 TARGET"
+    echoerr "    where TARGET is 'debian' or 'windows'"
+}
+
+if [ -n "$2" ]; then
+    echoerr "Too many arguments."
+    printUsage
+    exit 202
+fi
+
+case "$1" in
+"debian")
+    buildDebianPackage
+    ;;
+"windows")
+    buildWindowsInstaller
+    ;;
+"")
+    echoerr "No action specified"
+    printUsage
+    exit 200
+    ;;
+"--help" | "-help" | "help" | "?")
+    printUsage
+    ;;
+*)
+    echoerr "Unknown action '$1'"
+    printUsage
+    exit 201
+    ;;
+esac

build_logic/lwjgl.gradle

@@ -1,117 +0,0 @@
-/*
- * Build logic for Progressia
- * LWJGL dependency logic
- */
-
-project.ext.lwjgl = new HashMap<>()
-
-// Version of LWJGL
-lwjgl.version = '3.2.3'
-
-/*
- * Target platforms for current operation.
- * This is filled in by the request* tasks. This is referenced by the addLwjglNatives task.
- * When empty, current platform is assumed.
- */
-lwjgl.targets = new HashSet<>()
-
-// LWJGL components. To include org.lwjgl:lwjgl-foobar, add 'foobar' to this list.
-lwjgl.libraries = [
-	'opengl',
-	'glfw',
-	'openal',
-	'stb'
-]
-
-// Determine the architecture of the build environment
-import org.gradle.internal.os.OperatingSystem
-switch (OperatingSystem.current()) {
-	case OperatingSystem.LINUX:
-		def osArch = System.getProperty('os.arch')
-		lwjgl.localArch = osArch.startsWith('arm') || osArch.startsWith('aarch64')
-				? "linux-${osArch.contains('64') || osArch.startsWith('armv8') ? 'arm64' : 'arm32'}"
-				: 'linux'
-		break
-	case OperatingSystem.MAC_OS:
-		lwjgl.localArch = 'macos'
-		break
-	case OperatingSystem.WINDOWS:
-		lwjgl.localArch = System.getProperty('os.arch').contains('64') ? 'windows' : 'windows-x86'
-		break
-}
-
-// Declare pure-Java dependencies
-dependencies {
-	// BOM
-	implementation platform("org.lwjgl:lwjgl-bom:${lwjgl.version}")
-	
-	// Core
-	implementation 'org.lwjgl:lwjgl'
-	
-	// Components
-	lwjgl.libraries.each { implementation "org.lwjgl:lwjgl-$it" }
-}
-
-/*
- * Adds LWJGL native libraries to runtimeOnly configuration
- */
-task lwjgl_addNativesToRuntimeOnly {
-	// Make sure runtimeOnly has not been resolved
-	compileJava.dependsOn lwjgl_addNativesToRuntimeOnly
-	configureManifest.dependsOn lwjgl_addNativesToRuntimeOnly
-	exportLibs.dependsOn lwjgl_addNativesToRuntimeOnly
-
-	doFirst {
-		if (project.hasProperty('forceTargets')) {
-			try {
-				def oldTargets = lwjgl.targets.join(',')
-				
-				lwjgl.targets.clear()
-				lwjgl.targets.addAll project.forceTargets.split(',')*.trim().collect { it == 'local' ? lwjgl.localArch : it }
-				
-				logger.info 'Overriding selected platforms {} with {}', oldTargets, lwjgl.targets.join(',')
-			} catch (Exception e) {
-				throw new GradleException("Could not parse forceTargets \"${project.forceTargets}\", expecting platform-1,platform-2,local", e)
-			}
-		}
-	
-		if (lwjgl.targets.isEmpty()) {
-			logger.info 'Adding LWJGL native dependencies for local platform only: {}', lwjgl.localArch
-			lwjgl.targets.add lwjgl.localArch
-		} else {
-			logger.info 'Adding LWJGL native dependencies for platforms: {}', lwjgl.targets.sort().join(', ')
-		}
-		
-		dependencies {
-			lwjgl.targets.each { target ->
-				runtimeOnly "org.lwjgl:lwjgl::natives-$target"
-				lwjgl.libraries.each { lib ->
-					runtimeOnly "org.lwjgl:lwjgl-$lib::natives-$target"
-				}
-			}
-		}
-	}
-}
-
-task requestCrossPlatformDependencies {
-	description 'Adds LWJGL natives for all available platforms.'
-	
-	lwjgl_addNativesToRuntimeOnly.mustRunAfter requestCrossPlatformDependencies
-}
-
-def requestTask(String name, String... targets) {
-	def theTask = task "request${name}Dependencies"
-	
-	theTask.doFirst {
-		lwjgl.targets.addAll targets
-	}
-	
-	theTask.description "Adds LWJGL natives for $name (${targets.join(', ')})."
-
-	requestCrossPlatformDependencies.dependsOn theTask
-	lwjgl_addNativesToRuntimeOnly.mustRunAfter theTask
-}
-
-requestTask 'Linux', 'linux', 'linux-arm32', 'linux-arm64'
-requestTask 'Windows', 'windows', 'windows-x86'
-requestTask 'MacOS', 'macos'

build_logic/packaging/deb/script.gradle

@@ -1,38 +0,0 @@
-task packageDeb_processResources(type: Copy) {
-	dependsOn resolveVersion
-	dependsOn preparePackaging
-
-	from 'src/packaging/deb'
-	
-	filesMatching('DEBIAN/control') {
-		expand(version: { -> project.version})
-	}
-	
-	into 'build/tmp/packaging/workingDir'
-}
-
-task packageDeb_configure() {
-	preparePackaging.mustRunAfter packageDeb_configure
-
-	doLast {
-		tasks.preparePackaging.ext.buildDest = '/usr/share/progressia'
-		tasks.preparePackaging.ext.mode = 'copy'
-	}
-}
-
-task packageDeb(type: Exec) {
-	description 'Builds the project and creates a Debian package.'
-	group 'Progressia'
-	
-	dependsOn packageDeb_configure
-	dependsOn requestLinuxDependencies
-	dependsOn build
-	dependsOn preparePackaging
-	
-	dependsOn packageDeb_processResources
-	
-	executable 'dpkg-deb'
-	args '--root-owner-group'
-	args '--build', 'build/tmp/packaging/workingDir'
-	args 'build/packages'
-}

build_logic/packaging/nsis/script.gradle

@@ -1,50 +0,0 @@
-task packageNsis_processResources(type: Copy) {
-	dependsOn preparePackaging
-
-	from ('src/packaging/nsis') {
-		exclude 'left_side.png'
-	}
-	from('LICENSE') {
-		rename 'LICENSE', 'LICENSE.txt'
-	}
-	into 'build/tmp/packaging/workingDir'
-}
-
-task packageNsis_generateIcon(type: Exec) {
-	mustRunAfter preparePackaging
-	
-	executable 'convert'
-	args files('src/main/resources/assets/icons/*.original.png').files*.path
-	args 'build/tmp/packaging/workingDir/logo.ico'
-}
-
-task packageNsis_generateLeftSide(type: Exec) {
-	mustRunAfter preparePackaging
-	
-	executable 'convert'
-	args 'src/packaging/nsis/left_side.png'
-	args '-alpha', 'off'
-	args 'BMP3:build/tmp/packaging/workingDir/left_side.bmp'
-}
-
-task packageNsis(type: Exec) {
-	description 'Builds the project and creates a Windows NSIS installer.'
-	group 'Progressia'
-	
-	dependsOn requestWindowsDependencies
-	dependsOn build
-	dependsOn resolveVersion
-	dependsOn preparePackaging
-	
-	dependsOn packageNsis_processResources
-	dependsOn packageNsis_generateIcon
-	dependsOn packageNsis_generateLeftSide
-	
-	executable 'makensis'
-	args '-NOCONFIG'
-	args "-DPROJECT_NAME=${project.name}"
-	args "-DPROJECT_VERSION=${ -> project.version}"
-	args "-DMAIN_JAR_FILE=${ -> project.tasks.jar.archiveFileName.get()}"
-	args "-DOUTPUT_DIR=${project.buildDir.absolutePath}/packages"
-	args 'build/tmp/packaging/workingDir/config.nsi'
-}

build_logic/packaging/zip/script.gradle

@@ -1,41 +0,0 @@
-task packageZip_processResources(type: Copy) {
-	dependsOn preparePackaging
-
-	from ('src/packaging/zip') {
-		filesMatching('start.*') {
-			filter(
-				org.apache.tools.ant.filters.ReplaceTokens,
-				tokens: [mainJarFile: project.tasks.jar.archiveFileName.get()]
-			)
-		}
-	}
-	from ('src/main/resource/assets/icons/logo256.original.png') {
-		rename 'logo256.original.png', 'logo.png'
-	}
-	from('LICENSE') {
-		rename 'LICENSE', 'LICENSE.txt'
-	}
-	into 'build/tmp/packaging/workingDir'
-}
-
-task packageZip(type: Zip) {
-	description 'Builds the project and creates a cross-platform ZIP package.'
-	group 'Progressia'
-	
-	dependsOn resolveVersion
-	dependsOn requestCrossPlatformDependencies
-	dependsOn build
-	dependsOn preparePackaging
-	
-	dependsOn packageZip_processResources
-	
-	archiveBaseName = project.name
-	archiveAppendix = 'universal'
-	
-	doFirst {
-		archiveVersion = project.version
-	}
-	
-	from 'build/tmp/packaging/workingDir'
-	destinationDirectory = file('build/packages')
-}

build_packages/DEB/template/DEBIAN/control

@@ -1,8 +1,8 @@
-Package: progressia
+Package: progressia-techdemo
-Version: ${version}
+Version: 1.0
 Section: custom
 Priority: optional
 Architecture: all
 Maintainer: Javapony <kvadropups@gmail.com>
 Depends: java8-runtime
-Description: Progressia - a 3D sandbox survival game
+Description: Progressia Techdemo release

build_packages/NSIS/ProgressiaInstaller.nsi

@@ -1,164 +1,161 @@
-;NSIS Modern User Interface
+;NSIS Modern User Interface
-;Welcome/Finish Page Example Script
+;Welcome/Finish Page Example Script
-;Written by Joost Verburg
+;Written by Joost Verburg
-
+
-;--------------------------------
+;--------------------------------
-;Include Modern UI
+;Include Modern UI
-
+
-  !include "MUI2.nsh"
+  !include "MUI2.nsh"
-
+
-;--------------------------------
+;--------------------------------
-;General
+;General
-
+
-  ; Expecting the following symbols from caller:
+  !define PROJECT_NAME "Progressia"
-  ;   PROJECT_NAME
+
-  ;   PROJECT_VERSION
+  ; MUI Settings / Icons
-  ;   MAIN_JAR_FILE
+  !define MUI_ICON "logo.ico"
-
+  ;!define MUI_UNICON ;Uninstall icon
-  ; MUI Settings / Icons
+
-  !define MUI_ICON "logo.ico"
+  ; MUI Settings / Header
-  ;!define MUI_UNICON ;Uninstall icon
+  ; !define MUI_HEADERIMAGE
-
+  ; !define MUI_HEADERIMAGE_RIGHT
-  ; MUI Settings / Header
+  ; !define MUI_HEADERIMAGE_BITMAP "${NSISDIR}\Contrib\Graphics\Header\orange-r-nsis.bmp"
-  ; !define MUI_HEADERIMAGE
+  ; !define MUI_HEADERIMAGE_UNBITMAP "${NSISDIR}\Contrib\Graphics\Header\orange-uninstall-r-nsis.bmp"
-  ; !define MUI_HEADERIMAGE_RIGHT
+
-  ; !define MUI_HEADERIMAGE_BITMAP "${NSISDIR}\Contrib\Graphics\Header\orange-r-nsis.bmp"
+  ; MUI Settings / Wizard
-  ; !define MUI_HEADERIMAGE_UNBITMAP "${NSISDIR}\Contrib\Graphics\Header\orange-uninstall-r-nsis.bmp"
+  !define MUI_WELCOMEFINISHPAGE_BITMAP "left_side.bmp"
-
+  !define MUI_UNWELCOMEFINISHPAGE_BITMAP "left_side.bmp"
-  ; MUI Settings / Wizard
+
-  !define MUI_WELCOMEFINISHPAGE_BITMAP "left_side.bmp"
+  ;Name and file
-  !define MUI_UNWELCOMEFINISHPAGE_BITMAP "left_side.bmp"
+  Name "${PROJECT_NAME}"
-
+  OutFile "${PROJECT_NAME}Installer.exe"
-  ;Name and file
+  Unicode True
-  Name "${PROJECT_NAME}"
+
-  OutFile "${OUTPUT_DIR}/${PROJECT_NAME}-${PROJECT_VERSION}-installer.exe"
+  ;Default installation folder
-  Unicode True
+  InstallDir "$PROGRAMFILES\${PROJECT_NAME}"
-
+
-  ;Default installation folder
+  ;Get installation folder from registry if available
-  InstallDir "$PROGRAMFILES\${PROJECT_NAME}"
+  InstallDirRegKey HKLM "Software\${PROJECT_NAME}" ""
-
+
-  ;Get installation folder from registry if available
+  ;Request application privileges for Windows Vista
-  InstallDirRegKey HKLM "Software\${PROJECT_NAME}" ""
+  RequestExecutionLevel admin
-
+
-  ;Request application privileges for Windows Vista
+;--------------------------------
-  RequestExecutionLevel admin
+;Interface Settings
-
+
-;--------------------------------
+  !define MUI_ABORTWARNING
-;Interface Settings
+
-
+;--------------------------------
-  !define MUI_ABORTWARNING
+;Pages
-
+
-;--------------------------------
+  !insertmacro MUI_PAGE_WELCOME
-;Pages
+  !insertmacro MUI_PAGE_LICENSE "LICENSE.txt"
-
+  !insertmacro MUI_PAGE_COMPONENTS
-  !insertmacro MUI_PAGE_WELCOME
+  !insertmacro MUI_PAGE_DIRECTORY
-  !insertmacro MUI_PAGE_LICENSE "LICENSE.txt"
+  !insertmacro MUI_PAGE_INSTFILES
-  !insertmacro MUI_PAGE_COMPONENTS
+  !define MUI_FINISHPAGE_RUN
-  !insertmacro MUI_PAGE_DIRECTORY
+  !define MUI_FINISHPAGE_RUN_TEXT "Start ${PROJECT_NAME}"
-  !insertmacro MUI_PAGE_INSTFILES
+  !define MUI_FINISHPAGE_RUN_FUNCTION "LaunchLink"
-  !define MUI_FINISHPAGE_RUN
+  !insertmacro MUI_PAGE_FINISH
-  !define MUI_FINISHPAGE_RUN_TEXT "Start ${PROJECT_NAME}"
+
-  !define MUI_FINISHPAGE_RUN_FUNCTION "LaunchLink"
+  !insertmacro MUI_UNPAGE_WELCOME
-  !insertmacro MUI_PAGE_FINISH
+  !insertmacro MUI_UNPAGE_CONFIRM
-
+  !insertmacro MUI_UNPAGE_COMPONENTS
-  !insertmacro MUI_UNPAGE_WELCOME
+  !insertmacro MUI_UNPAGE_INSTFILES
-  !insertmacro MUI_UNPAGE_CONFIRM
+  !insertmacro MUI_UNPAGE_FINISH
-  !insertmacro MUI_UNPAGE_COMPONENTS
+
-  !insertmacro MUI_UNPAGE_INSTFILES
+;--------------------------------
-  !insertmacro MUI_UNPAGE_FINISH
+;Languages
-
+
-;--------------------------------
+  !insertmacro MUI_LANGUAGE "English"
-;Languages
+
-
+;--------------------------------
-  !insertmacro MUI_LANGUAGE "English"
+;Installer Sections
-
+
-;--------------------------------
+Section "Install ${PROJECT_NAME}" SEC0000
-;Installer Sections
+
-
+  SectionIn RO ;Make it read-only
-Section "Install ${PROJECT_NAME}" SEC0000
+  SetOutPath "$INSTDIR"
-
+  SetOverwrite on
-  SectionIn RO ;Make it read-only
+
-  SetOutPath "$INSTDIR"
+  ;Files
-  SetOverwrite on
+  File Progressia.jar
-
+  File logo.ico
-  ;Files
+  File /r lib
-  File "${MAIN_JAR_FILE}"
+
-  File logo.ico
+  ;Store installation folder
-  File /r lib
+  WriteRegStr HKLM SOFTWARE\Progressia "Install_Dir" "$INSTDIR"
-
+
-  ;Store installation folder
+  ;Create uninstaller
-  WriteRegStr HKLM "SOFTWARE\${PROJECT_NAME}" "Install_Dir" "$INSTDIR"
+
-
+  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${PROJECT_NAME}" "DisplayName" "${PROJECT_NAME} (remove only)"
-  ;Create uninstaller
+  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${PROJECT_NAME}" "UninstallString" "$INSTDIR\Uninstall.exe"
-
+  WriteUninstaller "$INSTDIR\Uninstall.exe"
-  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${PROJECT_NAME}" "DisplayName" "${PROJECT_NAME} (remove only)"
+
-  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${PROJECT_NAME}" "UninstallString" "$INSTDIR\Uninstall.exe"
+SectionEnd
-  WriteUninstaller "$INSTDIR\Uninstall.exe"
+
-
+Section "Create Desktop Shortcut" SEC0001
-SectionEnd
+  SetOutPath "$APPDATA\${PROJECT_NAME}"
-
+  CreateShortCut "$DESKTOP\${PROJECT_NAME}.lnk" "$INSTDIR\${PROJECT_NAME}.jar" "" "$INSTDIR\logo.ico"
-Section "Create Desktop Shortcut" SEC0001
+SectionEnd
-  SetOutPath "$APPDATA\${PROJECT_NAME}"
+
-  CreateShortCut "$DESKTOP\${PROJECT_NAME}.lnk" "$INSTDIR\${MAIN_JAR_FILE}" "" "$INSTDIR\logo.ico"
+Section "Start Menu Shortcuts" SEC0002
-SectionEnd
+
-
+  CreateDirectory "$SMPROGRAMS\${PROJECT_NAME}"
-Section "Start Menu Shortcuts" SEC0002
+  CreateShortcut "$SMPROGRAMS\${PROJECT_NAME}\Uninstall.lnk" "$INSTDIR\Uninstall.exe"
-
+  CreateShortcut "$SMPROGRAMS\${PROJECT_NAME}\${PROJECT_NAME}.lnk" "$INSTDIR\${PROJECT_NAME}.jar" "" "$INSTDIR\logo.ico"
-  CreateDirectory "$SMPROGRAMS\${PROJECT_NAME}"
+
-  CreateShortcut "$SMPROGRAMS\${PROJECT_NAME}\Uninstall.lnk" "$INSTDIR\Uninstall.exe"
+SectionEnd
-  CreateShortcut "$SMPROGRAMS\${PROJECT_NAME}\${PROJECT_NAME}.lnk" "$INSTDIR\${MAIN_JAR_FILE}" "" "$INSTDIR\logo.ico"
+
-
+;--------------------------------
-SectionEnd
+;Uninstaller Section
-
+
-;--------------------------------
+Section "Uninstall"
-;Uninstaller Section
+
-
+  ;ADD YOUR OWN FILES HERE...
-Section "Uninstall"
+
-
+  Delete $INSTDIR\Uninstall.exe
-  ;ADD YOUR OWN FILES HERE...
+  Delete $INSTDIR\Progressia.jar
-
+  Delete $INSTDIR\lib\*.*
-  Delete $INSTDIR\Uninstall.exe
+  Delete $INSTDIR\logo.ico
-  Delete "$INSTDIR\${MAIN_JAR_FILE}"
+
-  Delete $INSTDIR\lib\*.*
+  RMDir $INSTDIR\lib
-  Delete $INSTDIR\logo.ico
+
-
+  Delete $DESKTOP\${PROJECT_NAME}.lnk
-  RMDir $INSTDIR\lib
+
-
+  Delete $SMPROGRAMS\${PROJECT_NAME}\Uninstall.lnk
-  Delete $DESKTOP\${PROJECT_NAME}.lnk
+  Delete $SMPROGRAMS\${PROJECT_NAME}\${PROJECT_NAME}.lnk
-
+
-  Delete $SMPROGRAMS\${PROJECT_NAME}\Uninstall.lnk
+  RMDir $INSTDIR
-  Delete $SMPROGRAMS\${PROJECT_NAME}\${PROJECT_NAME}.lnk
+
-
+  RMDir /r $SMPROGRAMS\${PROJECT_NAME}
-  RMDir $INSTDIR
+
-
+  DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${PROJECT_NAME}"
-  RMDir /r $SMPROGRAMS\${PROJECT_NAME}
+  DeleteRegKey HKLM "Software\${PROJECT_NAME}"
-
+
-  DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${PROJECT_NAME}"
+SectionEnd
-  DeleteRegKey HKLM "Software\${PROJECT_NAME}"
+
-
+Section "un.Remove user data"
-SectionEnd
+
-
+  RMDir /r "$APPDATA\${PROJECT_NAME}"
-Section "un.Remove user data"
+
-
+SectionEnd
-  RMDir /r "$APPDATA\${PROJECT_NAME}"
+
-
+;--------------------------------
-SectionEnd
+;Functions
-
+
-;--------------------------------
+Function LaunchLink
-;Functions
+  SetOutPath "$APPDATA\${PROJECT_NAME}"
-
+  ExecShell "" "$INSTDIR\${PROJECT_NAME}.jar"
-Function LaunchLink
+FunctionEnd
-  SetOutPath "$APPDATA\${PROJECT_NAME}"
+
-  ExecShell "" "$INSTDIR\${MAIN_JAR_FILE}"
+;--------------------------------
-FunctionEnd
+;Descriptions
-
+
-;--------------------------------
+  ;Language strings
-;Descriptions
+  LangString DESC_SecDummy ${LANG_ENGLISH} "Install ${PROJECT_NAME}."
-
+
-  ;Language strings
+  ;Assign language strings to sections
-  LangString DESC_SecDummy ${LANG_ENGLISH} "Install ${PROJECT_NAME}."
+  !insertmacro MUI_FUNCTION_DESCRIPTION_BEGIN
-
+  !insertmacro MUI_DESCRIPTION_TEXT ${SEC0000} $(DESC_SecDummy)
-  ;Assign language strings to sections
+  !insertmacro MUI_FUNCTION_DESCRIPTION_END
-  !insertmacro MUI_FUNCTION_DESCRIPTION_BEGIN
-  !insertmacro MUI_DESCRIPTION_TEXT ${SEC0000} $(DESC_SecDummy)
-  !insertmacro MUI_FUNCTION_DESCRIPTION_END

docs/building/BuildGuide.md

@@ -1,10 +1,8 @@
 # Build Guide
 
-This document is a guide to building Progressia from source. For quick reference, see
+This document is a guide to building Progressia from source.
-[Build Script Reference](BuildScriptReference.md).
 
-Compilation should be possible on all platforms that support JDK 8 or later, however, packaging scripts require
+Compilation should be possible on all platforms that support JDK 8 or later, however, packaging scripts require Bash.
-additional programs in `PATH`.
 
 This guide assumes you are familiar with using a terminal or Windows Command Prompt or PowerShell.
 
@@ -152,46 +150,54 @@ GNU/Linux and Windows natives:
 ./gradlew build requestLinuxDependencies requestWindowsDependencies
 ```
 
+For finer control please edit `build.gradle` manually by adding the desired natives to the `project.ext.platforms` set like so:
+
+```
+project.ext.platforms = new HashSet<>()
+project.ext.platforms.add 'natives-windows-x86'
+```
+
 ## Packaging
 
-A universal ZIP distribution, a Debian package and a Windows NSIS installer may be created automatically by the build
+A Debian package and a Windows installer can be created automatically on systems that support Bash. These tasks are delegated
-script.
+by Gradle to `buildPackages.sh` in repository root. This script checks the environment and assembles the requested output; the
-
+resulting files are moved into `build_packages`.
-### Creating a universal ZIP package
-
-A universal cross-platform ZIP archive can be created with the following Gradle task:
-
-```
-./gradlew packageZip
-```
-
-Gradle will then build all artifacts necessary to run the game on all available platforms and package game files,
-libraries, launch scripts, etc. into a compressed ZIP archive.
-
-The resulting file can be found in `build/packages/`
 
 ### Creating a Debian package
 
 A Debian package can be created with the following Gradle task:
 
 ```
-./gradlew packageDeb
+./gradlew packageDebian
 ```
 
 Gradle will then build all artifacts necessary to run the game on GNU/Linux (all three architectures) and invoke
-`dpkg-deb`. Commands `dpkg-deb` must be available in system path in order to build the package.
+`./buildPackages.sh debian`. Commands `dpkg-deb` and `fakeroot` must be available in system path in order to build the package.
 
 ### Creating a Windows installer
 
-A Windows NSIS installer can be created with the following Gradle task:
+A Windows installer can be created with the following Gradle task:
 
 ```
-./gradlew packageNsis
+./gradlew packageWindows
 ```
 
 Gradle will then build all artifacts necessary to run the game on Windows (both x64 and x86 architectures) and invoke
-`makensis`.
+`./buildPackages.sh windows`.
 
-Windows installers are implemented with [NSIS](https://nsis.sourceforge.io/). [ImageMagick](https://imagemagick.org),
+Windows installers are implemented with [NSIS](https://nsis.sourceforge.io/). Command `makensis` must be available in system
-a command-line image editing tool, is used to generate some assets for the installer. Commands `makensis` and
+path in order to build the installer.
-`convert` (from ImageMagick) must be available in system path in order to build the installer.
+
+## Gradle tasks summary
+
+- `buildLocal` – creates a build optimized for current platform. Use this to quickly build the game during development.
+- `buildCrossPlatform` – creates a build that supports all known architectures. Use this to build a universal version of the game.
+- `build` – currently a synonym of `buildLocal`; creates a default build.
+- `packageDebian` – creates a Debian package. Do not invoke together with `packageWindows`.
+- `packageWindows` – creates a Windows installer. Do not invoke together with `packageDebian`.
+- `requestLinuxDependencies` – requests that `natives-linux`, `natives-linux-arm32` and `natives-linux-arm64` binaries are included when building.
+- `requestWindowsDependencies` – requests that `natives-windows` and `natives-windows-x86` binaries are included when building.
+- `requestMacOSDependencies` – requests that `natives-macos` binaries are included when building.
+- `requestCrossPlatformDependencies` – requests that all binaries are included when building.
+
+All other basic and Java-related Gradle tasks are available as well.

docs/building/BuildScriptReference.md

@@ -1,103 +0,0 @@
-# Build Script Reference
-
-This document is a user's reference for the build script of Progressia. For a beginner-friendly guide, see
-[Build Guide](BuildGuide.md).
-
-## Gradle tasks summary
-
-- `buildLocal` – creates a build optimized for current platform. Use this to quickly build the game during development.
-- `buildCrossPlatform` – creates a build that supports all known architectures. Use this to build a universal version of the game.
-- `build` – currently a synonym of `buildLocal`; creates a default build.
-- `packageZip` – creates a universal ZIP. Incompatible with other `package` tasks.
-- `packageDeb` – creates a Debian package. Incompatible with other `package` tasks.
-- `packageNsis` – creates a Windows NSIS installer. Incompatible with other `package` tasks.
-- `requestLinuxDependencies` – requests that `natives-linux`, `natives-linux-arm32` and `natives-linux-arm64` binaries are included when building.
-- `requestWindowsDependencies` – requests that `natives-windows` and `natives-windows-x86` binaries are included when building.
-- `requestMacOSDependencies` – requests that `natives-macos` binaries are included when building.
-- `requestCrossPlatformDependencies` – requests that all binaries are included when building.
-
-To execute a task, run `./gradlew <task-name>`.
-
-`build`-type tasks output the executable JAR and all libraries required at runtime into `build/libs`. `package`-type
-tasks output packages into `build/packages`.
-
-## Packaging tasks
-
-Some packaging tasks require additional software in `PATH`.
-
-| Task          | Commands required in `PATH`              |
-|---------------|------------------------------------------|
-| `packageDeb`  | `dpkg-deb`                               |
-| `packageZip`  | _none_                                   |
-| `packageNsis` | `makensis`, `convert` (from ImageMagick) |
-
-## Version and metadata
-
-### Version scheme
-
-Progressia builds are identified by four parameters: version, Git commit, Git branch and build ID.
-
-Versions roughly follow [semantic versioning](https://semver.org/spec/v2.0.0.html), with each version fitting the
-`MAJOR.MINOR.PATCH[-SUFFIX]` pattern. Depending on the build environment (see below), version is either "real" with
-no metadata (e.g. `0.43.2` or `1.2.1-beta`) or a dummy fallback with build metadata (e.g. `999.0.0-2021_07_23` or
-`999.0.0-WJ3`).
-
-### Version detection
-
-Build script considers three scenarios when determining the version:
-
-1. `version` project property is set explicitly. This may be done in a variety of ways, for example with command line
-argument `-Pversion=1.2.3`
-(see [Gradle docs](https://docs.gradle.org/current/userguide/build_environment.html#sec:project_properties))
-2. Local Git repository is found, and HEAD is tagged appropriately: version is the tag name with leading `v`
-stripped. Example: `v1.2.3` is version `1.2.3`
-3. Local Git repository is found, and some ancestor of HEAD is tagged appropriately: version is the tag name with
-leading `v` stripped and PATCH incremented by one. Example: `v1.2.3` is version `1.2.4`
-
-Tags not named like `vMAJOR.MINOR.PATCH[-SUFFIX]` are ignored for cases 2 and 3.
-
-In all other cases, a fallback dummy value is used for version, appended with build ID or current date.
-
-### Git metadata
-
-Git commit and Git branch are correspond to the state of the local Git repository, if any. In case Git metadata is
-unavailable, `-` fallback is used for both fields.
-
-### Build ID
-
-Build ID uniquely identifies artifacts produced by automated build systems. For example, builds executed by WindCorp
-Jenkins suite have build IDs like `WJ3` or `WJ142`. Build ID must be provided explicitly; it is `-` unless specified
-otherwise.
-
-Build ID may be set with `buildId` project property. This may be done in a variety of ways, for example with command
-line argument `-PbuildId=WJ3`
-(see [Gradle docs](https://docs.gradle.org/current/userguide/build_environment.html#sec:project_properties)).
-
-## Native libraries
-
-LWJGL uses native libraries. Build script declares platform-specific dependencies based on the set of target
-platforms, `project.ext.lwjgl.targets` (aka `lwjgl.targets`). These dependencies are added to `runtimeOnly`
-configuration.
-
-When this set is empty, the script selects natives for current platform. Otherwise, all platforms in the set are
-included.
-
-`lwjgl.targets` is populated automatically by packaging tasks and by `buildCrossPlatform`. To add extra targets,
-``requestXxxDependencies` tasks may be used.
-
-Target selection mechanism may be overridden with `forceTargets` project property. This may be done in a variety of
-ways, for example with command line argument `-PforceTargets=windows-x86,local`
-(see [Gradle docs](https://docs.gradle.org/current/userguide/build_environment.html#sec:project_properties)). The
-value is a comma-separated list of target architectures. `local` target will be replaced with the automatically
-detected current architecture.
-
-### Available targets
-
-| Name          | Task                         |
-|---------------|------------------------------|
-| `linux`       | `requestLinuxDependencies`   |
-| `linux-arm32` | `requestLinuxDependencies`   |
-| `linux-arm64` | `requestLinuxDependencies`   |
-| `windows`     | `requestWindowsDependencies` |
-| `windows-x86` | `requestWindowsDependencies` |
-| `macos`       | `requestMacOSDependencies`   |

logs/game.log

@@ -1 +0,0 @@
-22:26:25.948 [Music Thread        ] WARN  ru.windcorp.progressia.test.TestMusicPlayer >   No music found

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

@@ -15,180 +15,9 @@
  * 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 java.io.IOException;
-import java.net.URL;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Enumeration;
-import java.util.jar.Attributes;
-import java.util.jar.Manifest;
-
-import org.apache.logging.log4j.LogManager;
-
-import ru.windcorp.progressia.common.util.crash.CrashReports;
-
-/**
- * A class providing access to build metadata.
- */
 public class Progressia {
 
-	private static final String NAME = "Progressia";
-	private static String version;
-	private static String gitCommit;
-	private static String gitBranch;
-	private static String buildId;
-
-	static {
-		try {
-			Manifest manifest = findManifest();
-
-			if (manifest == null) {
-				setDevelopmentMetadata();
-				LogManager.getLogger().info(
-					"Manifest with Specification-Title not found. "
-						+ "Either you are in a development environment or something has gone horribly wrong with classloaders."
-				);
-			} else {
-				fillMetadata(manifest);
-			}
-		} catch (Throwable t) {
-			CrashReports.crash(t, "Something went wrong while loading metadata");
-		}
-	}
-
-	private static Manifest findManifest() {
-		try {
-			Enumeration<URL> resources = Progressia.class.getClassLoader().getResources("META-INF/MANIFEST.MF");
-			Collection<IOException> exceptions = new ArrayList<>();
-
-			while (resources.hasMoreElements()) {
-				URL url = resources.nextElement();
-
-				try {
-
-					Manifest manifest = new Manifest(url.openStream());
-					Attributes mainAttributes = manifest.getMainAttributes();
-					if (NAME.equals(mainAttributes.getValue("Specification-Title"))) {
-						return manifest;
-					}
-
-				} catch (IOException e) {
-					exceptions.add(e);
-				}
-			}
-
-			if (exceptions.isEmpty()) {
-				return null;
-			}
-
-			IOException scapegoat = null;
-			for (IOException e : exceptions) {
-				if (scapegoat == null) {
-					scapegoat = e;
-				} else {
-					scapegoat.addSuppressed(e);
-				}
-			}
-
-			throw CrashReports.report(scapegoat, "Could not read manifest");
-		} catch (IOException e) {
-			throw CrashReports.report(e, "Could not read manifest");
-		}
-	}
-
-	private static void setDevelopmentMetadata() {
-		version = "dev";
-		gitCommit = "-";
-		gitBranch = "-";
-		buildId = "-";
-	}
-
-	private static void fillMetadata(Manifest manifest) {
-		version = getAttributeOrCrash(manifest, "Implementation-Version");
-		gitCommit = getAttributeOrCrash(manifest, "Implementation-Version-Git-Commit");
-		gitBranch = getAttributeOrCrash(manifest, "Implementation-Version-Git-Branch");
-		buildId = getAttributeOrCrash(manifest, "Implementation-Version-BuildId");
-	}
-
-	private static String getAttributeOrCrash(Manifest manifest, String key) {
-		String result = manifest.getMainAttributes().getValue(key);
-		if (result == null) {
-			throw CrashReports.report(null, "Manifest exists but attribute " + key + " not found");
-		}
-		return result;
-	}
-
-	public static String getName() {
-		return NAME;
-	}
-
-	/**
-	 * Returns the version of the game as a String. Version data is retrieved
-	 * from a {@code META-INF/MANIFEST.MF} file located in the main JAR. Version
-	 * format depends on way the game was built:
-	 * <ul>
-	 * <li><code>dev</code> if no matching manifest was found, e.g. when launching from an IDE</li>
-	 * <li>The value of <code>Implementation-Version</code> specified in the manifest:
-	 * <ul>
-	 * <li>[Stage-]Major.Minor.Patch, e.g. <code>alpha-0.3.2</code> or <code>1.4.2</code>, for released versions</li>
-	 * <li>BuildId, e.g. <code>WJ7</code>, for snapshots built by automation systems</li>
-	 * <li>YYYY-MM-DD, e.g. <code>2021-12-32</code>, for snapshots built manually</li>
-	 * </ul>
-	 * </li>
-	 * </ul>
-	 * 
-	 * @return the version
-	 */
-	public static String getVersion() {
-		return version;
-	}
-	
-	public static String getFullerVersion() {
-		if (isDefaultGitBranch() || "-".equals(gitBranch)) {
-			return version;
-		} else {
-			return String.format("%s/%s", version, gitBranch);
-		}
-	}
-	
-	/**
-	 * @return the buildId or <code>"-"</code>
-	 */
-	public static String getBuildId() {
-		return buildId;
-	}
-	
-	/**
-	 * @return the Git commit or <code>"-"</code>
-	 */
-	public static String getGitCommit() {
-		return gitCommit;
-	}
-	
-	public static String getGitCommitShort() {
-		if (gitCommit == null || "-".equals(gitCommit)) {
-			return gitCommit;
-		}
-		
-		return gitCommit.substring(0, Math.min(7, gitCommit.length()));
-	}
-	
-	/**
-	 * @return the Git branch or <code>"-"</code>
-	 */
-	public static String getGitBranch() {
-		return gitBranch;
-	}
-	
-	public static boolean isDefaultGitBranch() {
-		return "master".equals(gitBranch) || "main".equals(gitBranch);
-	}
-	
-	public static String getFullVersion() {
-		return String.format("%s/%s/%s/%s", version, gitBranch, getGitCommitShort(), buildId);
-	}
-
 }

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

@@ -18,8 +18,6 @@
 
 package ru.windcorp.progressia;
 
-import org.apache.logging.log4j.LogManager;
-
 import ru.windcorp.progressia.client.graphics.GUI;
 import ru.windcorp.progressia.common.util.crash.CrashReports;
 import ru.windcorp.progressia.common.util.crash.analyzers.OutOfMemoryAnalyzer;
@@ -34,8 +32,6 @@ public class ProgressiaLauncher {
 	public static void launch(String[] args, Proxy proxy) {
 		arguments = args.clone();
 		setupCrashReports();
-		
-		LogManager.getRootLogger().info("Launching " + Progressia.getName() + " version " + Progressia.getFullVersion());
 
 		proxy.initialize();
 		ProgressiaLauncher.proxy = proxy;
@@ -48,7 +44,6 @@ public class ProgressiaLauncher {
 
 	private static void setupCrashReports() {
 		// Context providers
-		CrashReports.registerProvider(new VersionProvider());
 		CrashReports.registerProvider(new OSContextProvider());
 		CrashReports.registerProvider(new RAMContextProvider());
 		CrashReports.registerProvider(new JavaVersionContextProvider());

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

@@ -18,21 +18,42 @@
  
 package ru.windcorp.progressia.client;
 
+import com.google.common.eventbus.EventBus;
+import com.google.common.eventbus.Subscribe;
+
 import ru.windcorp.progressia.client.comms.DefaultClientCommsListener;
 import ru.windcorp.progressia.client.comms.ServerCommsChannel;
+import ru.windcorp.progressia.client.events.ClientEvent;
+import ru.windcorp.progressia.client.events.NewLocalEntityEvent;
+import ru.windcorp.progressia.client.graphics.GUI;
 import ru.windcorp.progressia.client.graphics.world.Camera;
 import ru.windcorp.progressia.client.graphics.world.EntityAnchor;
+import ru.windcorp.progressia.client.graphics.world.LayerWorld;
 import ru.windcorp.progressia.client.graphics.world.LocalPlayer;
+import ru.windcorp.progressia.client.graphics.world.hud.HUDManager;
 import ru.windcorp.progressia.client.world.WorldRender;
+import ru.windcorp.progressia.common.util.crash.ReportingEventBus;
 import ru.windcorp.progressia.common.world.DefaultWorldData;
-import ru.windcorp.progressia.common.world.entity.EntityData;
+import ru.windcorp.progressia.test.LayerAbout;
+import ru.windcorp.progressia.test.LayerDebug;
+import ru.windcorp.progressia.test.LayerTestUI;
 
 public class Client {
 
 	private final WorldRender world;
+	
+	private final LayerWorld layerWorld = new LayerWorld(this);
+	private final LayerTestUI layerTestUI = new LayerTestUI();
+	private final LayerAbout layerAbout = new LayerAbout();
+	private final LayerDebug layerDebug = new LayerDebug();
+	
 	private final LocalPlayer localPlayer = new LocalPlayer(this);
 
 	private final Camera camera = new Camera((float) Math.toRadians(70));
+	
+	private final EventBus eventBus = ReportingEventBus.create("ClientEvents");
+	
+	private final HUDManager hudManager = new HUDManager(this);
 
 	private final ServerCommsChannel comms;
 
@@ -41,6 +62,22 @@ public class Client {
 		this.comms = comms;
 
 		comms.addListener(new DefaultClientCommsListener(this));
+		subscribe(this);
+	}
+	
+	public void install() {
+		GUI.addBottomLayer(layerWorld);
+		GUI.addTopLayer(layerTestUI);
+		hudManager.install();
+		GUI.addTopLayer(layerAbout);
+	}
+	
+	public void remove() {
+		GUI.removeLayer(layerWorld);
+		GUI.removeLayer(layerTestUI);
+		hudManager.remove();
+		GUI.removeLayer(layerAbout);
+		GUI.removeLayer(layerDebug);
 	}
 
 	public WorldRender getWorld() {
@@ -62,18 +99,45 @@ public class Client {
 	public ServerCommsChannel getComms() {
 		return comms;
 	}
+	
+	public HUDManager getHUD() {
+		return hudManager;
+	}
 
-	public void onLocalPlayerEntityChanged(EntityData entity, EntityData lastKnownEntity) {
+	public void toggleDebugLayer() {
-		if (entity == null) {
+		if (GUI.getLayers().contains(layerDebug)) {
+			GUI.removeLayer(layerDebug);
+		} else {
+			GUI.addTopLayer(layerDebug);
+		}
+	}
+
+	@Subscribe
+	private void onLocalPlayerEntityChanged(NewLocalEntityEvent e) {
+		if (e.getNewEntity() == null) {
 			getCamera().setAnchor(null);
 			return;
 		}
 
 		getCamera().setAnchor(
 			new EntityAnchor(
-				getWorld().getEntityRenderable(entity)
+				getWorld().getEntityRenderable(e.getNewEntity())
 			)
 		);
 	}
 
+	public void subscribe(Object object) {
+		eventBus.register(object);
+	}
+
+	public void unsubscribe(Object object) {
+		eventBus.unregister(object);
+	}
+
+	public void postEvent(ClientEvent event) {
+		event.setClient(this);
+		eventBus.post(event);
+		event.setClient(null);
+	}
+
 }

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

@@ -27,6 +27,7 @@ import ru.windcorp.progressia.client.graphics.font.GNUUnifontLoader;
 import ru.windcorp.progressia.client.graphics.font.Typefaces;
 import ru.windcorp.progressia.client.graphics.texture.Atlases;
 import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
+import ru.windcorp.progressia.client.graphics.world.hud.HUDTextures;
 import ru.windcorp.progressia.client.localization.Localizer;
 import ru.windcorp.progressia.common.resource.ResourceManager;
 import ru.windcorp.progressia.common.util.crash.CrashReports;
@@ -47,6 +48,7 @@ public class ClientProxy implements Proxy {
 				() -> Typefaces
 					.setDefault(GNUUnifontLoader.load(ResourceManager.getResource("assets/unifont-13.0.03.hex.gz")))
 			);
+			RenderTaskQueue.waitAndInvoke(HUDTextures::loadItemAmountTypeface);
 		} catch (InterruptedException e) {
 			throw CrashReports.report(e, "ClientProxy failed");
 		}

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

@@ -20,14 +20,10 @@ 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.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;
 
 public class ClientState {
@@ -70,24 +66,14 @@ public class ClientState {
 			
 			if (client != null && client.getLocalPlayer().hasEntity()) {
 				GUI.removeLayer(layer);
-
+				client.install();
-				// 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();
-		
+		getInstance().remove();
-		for (Layer layer : GUI.getLayers()) {
-			GUI.removeLayer(layer);
-		}
 	}
 
 	private ClientState() {

src/main/java/ru/windcorp/progressia/client/events/ClientEvent.java

@@ -0,0 +1,68 @@
+/*
+ * 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.events;
+
+import ru.windcorp.progressia.client.Client;
+
+/**
+ * An interface for all events issued by a {@link Client}.
+ */
+public interface ClientEvent {
+
+	/**
+	 * Returns the client instance that this event happened on.
+	 * 
+	 * @return the client
+	 */
+	Client getClient();
+
+	/**
+	 * Sets the client instance that the event is posted on. The value provided
+	 * to this method must be returned by subsequent calls to
+	 * {@link #getClient()}. Do not call this method when handling the event.
+	 * 
+	 * @param client the client dispatching the event or {@code null} to unbind
+	 *               any previously bound client
+	 */
+	void setClient(Client client);
+
+	/**
+	 * A default implementation of {@link ClientEvent}. This is not necessarily
+	 * extended by client events.
+	 */
+	public static abstract class Default implements ClientEvent {
+
+		private Client client;
+
+		public Default(Client client) {
+			this.client = client;
+		}
+
+		@Override
+		public Client getClient() {
+			return client;
+		}
+
+		@Override
+		public void setClient(Client client) {
+			this.client = client;
+		}
+
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/events/NewLocalEntityEvent.java

@@ -0,0 +1,51 @@
+/*
+ * 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.events;
+
+import ru.windcorp.progressia.client.Client;
+import ru.windcorp.progressia.common.world.entity.EntityDataPlayer;
+
+public interface NewLocalEntityEvent extends ClientEvent {
+
+	EntityDataPlayer getNewEntity();
+	EntityDataPlayer getPreviousEntity();
+	
+	public class Immutable extends ClientEvent.Default implements NewLocalEntityEvent {
+		
+		private final EntityDataPlayer newEntity;
+		private final EntityDataPlayer previousEntity;
+		
+		public Immutable(Client client, EntityDataPlayer newEntity, EntityDataPlayer previousEntity) {
+			super(client);
+			this.newEntity = newEntity;
+			this.previousEntity = previousEntity;
+		}
+		
+		@Override
+		public EntityDataPlayer getNewEntity() {
+			return newEntity;
+		}
+		
+		@Override
+		public EntityDataPlayer getPreviousEntity() {
+			return previousEntity;
+		}
+		
+	}
+
+}

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

@@ -55,6 +55,25 @@ public class Colors {
 			output = new Vec4();
 		return color.mul(multiplier, multiplier, multiplier, 1, output);
 	}
+	
+	public static Vec4 mix(Vec4 zero, Vec4 one, float t, Vec4 output) {
+		if (output == null) {
+			output = new Vec4();
+		}
+		
+		if (t <= 0) {
+			return output.set(zero);
+		} else if (t >= 1) {
+			return output.set(one);
+		}
+		
+		return output.set(
+			zero.x * (1 - t) + one.x * t,
+			zero.y * (1 - t) + one.y * t,
+			zero.z * (1 - t) + one.z * t,
+			zero.w * (1 - t) + one.w * t
+		);
+	}
 
 	public static Vec4 toVector(int argb, Vec4 output) {
 		output.w = ((argb & 0xFF000000) >>> 24) / (float) 0xFF; // Alpha

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

@@ -0,0 +1,61 @@
+/*
+ * 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;
+
+import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
+
+public class ExponentAnimation {
+	
+	private final float speed;
+	private float value;
+	
+	public ExponentAnimation(float speed, float value) {
+		this.speed = speed;
+		this.value = value;
+	}
+	
+	public float getSpeed() {
+		return speed;
+	}
+	
+	public float getValue() {
+		return value;
+	}
+	
+	public void setValue(float value) {
+		this.value = value;
+	}
+	
+	public float update(float target, double timeStep) {
+		float difference = value - target;
+		value += difference * (1 - Math.exp(speed * timeStep));
+		
+		float newDifference = value - target;
+		if (difference * newDifference < 0) {
+			// Whoops, we've overshot
+			value = target;
+		}
+		
+		return value;
+	}
+	
+	public float updateForFrame(float target) {
+		return update(target, GraphicsInterface.getFrameLength());
+	}
+
+}

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

@@ -65,6 +65,12 @@ public class GUI {
 			layer.onRemoved();
 		});
 	}
+	
+	public static void updateLayer(Layer layer) {
+		modify(layers -> {
+			// Do nothing
+		});
+	}
 
 	private static void modify(LayerStackModification mod) {
 		MODIFICATION_QUEUE.add(mod);

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

@@ -15,30 +15,20 @@
  * 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.backend;
 
 import static org.lwjgl.opengl.GL11.*;
 import static org.lwjgl.glfw.GLFW.*;
 import static org.lwjgl.system.MemoryUtil.*;
 
-import java.io.IOException;
-
-import org.lwjgl.glfw.GLFWImage;
 import org.lwjgl.opengl.GL;
 
 import com.google.common.eventbus.Subscribe;
 
-import ru.windcorp.progressia.Progressia;
 import ru.windcorp.progressia.client.graphics.GUI;
 import ru.windcorp.progressia.client.graphics.input.FrameResizeEvent;
 import ru.windcorp.progressia.client.graphics.input.InputEvent;
-import ru.windcorp.progressia.client.graphics.texture.TextureDataEditor;
-import ru.windcorp.progressia.client.graphics.texture.TextureLoader;
-import ru.windcorp.progressia.client.graphics.texture.TextureSettings;
-import ru.windcorp.progressia.common.resource.Resource;
-import ru.windcorp.progressia.common.resource.ResourceManager;
-import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 class LWJGLInitializer {
 
@@ -73,20 +63,14 @@ class LWJGLInitializer {
 		glfwWindowHint(GLFW_FOCUSED, GLFW_TRUE);
 		glfwWindowHint(GLFW_MAXIMIZED, GLFW_TRUE);
 
-		long handle = glfwCreateWindow(
+		long handle = glfwCreateWindow(900, 900, "ProgressiaTest", NULL, NULL);
-			800,
-			600,
-			Progressia.getName() + " " + Progressia.getFullerVersion(),
-			NULL,
-			NULL
-		);
 
 		// TODO Check that handle != NULL
 
 		GraphicsBackend.setWindowHandle(handle);
 
 		glfwMakeContextCurrent(handle);
-		glfwSwapInterval(0); // TODO: remove after config system is added
+		glfwSwapInterval(0);	// TODO: remove after config system is added
 	}
 
 	private static void positionWindow() {
@@ -95,30 +79,8 @@ class LWJGLInitializer {
 	}
 
 	private static void createWindowIcons() {
-		if (glfwGetVersionString().toLowerCase().contains("wayland")) {
+		// TODO Auto-generated method stub
-			// glfwSetWindowIcon is not supported on Wayland
-			return;
-		}
-		
-		final String prefix = "assets/icons/";
 
-		String[] sizes = ResourceManager.getResource(prefix + "logoSizes.txt").readAsString().split(" ");
-
-		try (GLFWImage.Buffer buffer = GLFWImage.malloc(sizes.length)) {
-			for (int i = 0; i < sizes.length; ++i) {
-				Resource resource = ResourceManager.getResource(prefix + "logo" + sizes[i].trim() + ".png");
-				TextureDataEditor icon = TextureLoader.loadPixels(resource, new TextureSettings(false, true));
-
-				buffer.position(i)
-					.width(icon.getContentWidth())
-					.height(icon.getContentHeight())
-					.pixels(icon.getData().getData());
-			}
-
-			glfwSetWindowIcon(GraphicsBackend.getWindowHandle(), buffer);
-		} catch (IOException e) {
-			throw CrashReports.report(e, "Could not load window icons");
-		}
 	}
 
 	private static void initializeOpenGL() {
@@ -150,19 +112,19 @@ class LWJGLInitializer {
 		glfwSetScrollCallback(handle, InputHandler::handleWheelScroll);
 
 		GraphicsInterface.subscribeToInputEvents(new Object() {
-
+			
 			@Subscribe
 			public void onFrameResized(FrameResizeEvent event) {
 				GUI.invalidateEverything();
 			}
-
+			
 			@Subscribe
 			public void onInputEvent(InputEvent event) {
 				GUI.dispatchInput(event);
 			}
-
+			
 		});
-
+		
 	}
 
 }

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

@@ -191,7 +191,8 @@ public class RenderTarget {
 		assembleCurrentClipFromFaces();
 		
 		float depth = this.depth--;
-		Mat4 transform = new Mat4().translate(0, 0, depth).mul(getTransform());
+		final float kostyl = 1e-2f;
+		Mat4 transform = new Mat4().translate(0, 0, depth).scale(1, 1, kostyl).mul(getTransform());
 		assembled.add(new Clip(maskStack, transform, renderable));
 	}
 

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

@@ -32,20 +32,23 @@ public class Font {
 	private final int style;
 	private final float align;
 	private final Vec4 color;
+	
+	private final int scale;
 
-	public Font(Typeface typeface, int style, float align, Vec4 color) {
+	public Font(Typeface typeface, int style, float align, Vec4 color, int scale) {
 		this.typeface = typeface;
 		this.style = style;
 		this.align = align;
 		this.color = color;
+		this.scale = scale;
 	}
 
-	public Font(Typeface typeface, int style, float align, int color) {
+	public Font(Typeface typeface, int style, float align, int color, int scale) {
-		this(typeface, style, align, Colors.toVector(color));
+		this(typeface, style, align, Colors.toVector(color), scale);
 	}
 
 	public Font(Typeface typeface) {
-		this(typeface, Typeface.Style.PLAIN, Typeface.ALIGN_LEFT, Colors.WHITE);
+		this(typeface, Typeface.Style.PLAIN, Typeface.ALIGN_LEFT, Colors.WHITE, 2);
 	}
 
 	public Font() {
@@ -67,31 +70,63 @@ public class Font {
 	public Vec4 getColor() {
 		return color;
 	}
-
+	
-	public Renderable assemble(
+	public int getScale() {
-		CharSequence chars,
+		return scale;
-		float maxWidth
+	}
-	) {
+	
-		return typeface.assembleStatic(chars, style, align, maxWidth, color);
+	private Renderable applyScale(Renderable unscaled) {
+		if (scale == 1) {
+			return unscaled;
+		}
+		
+		return renderer -> {
+			renderer.pushTransform().scale(scale);
+			unscaled.render(renderer);
+			renderer.popTransform();
+		};
 	}
 
-	public Renderable assembleDynamic(
+	public Renderable assemble(CharSequence chars, float maxWidth) {
-		Supplier<CharSequence> supplier,
+		return applyScale(typeface.assembleStatic(chars, style, align, maxWidth, color));
-		float maxWidth
+	}
-	) {
+
-		return typeface.assembleDynamic(supplier, style, align, maxWidth, color);
+	public Renderable assembleDynamic(Supplier<CharSequence> supplier, float maxWidth) {
+		return applyScale(typeface.assembleDynamic(supplier, style, align, maxWidth, color));
+	}
+	
+	public Renderable assemble(CharSequence chars) {
+		return assemble(chars, Float.POSITIVE_INFINITY);
+	}
+
+	public Renderable assembleDynamic(Supplier<CharSequence> supplier) {
+		return assembleDynamic(supplier, Float.POSITIVE_INFINITY);
 	}
 
 	public int getWidth(CharSequence chars, float maxWidth) {
-		return typeface.getWidth(chars, style, align, maxWidth);
+		return scale * typeface.getWidth(chars, style, align, maxWidth);
 	}
 
 	public int getHeight(CharSequence chars, float maxWidth) {
-		return typeface.getHeight(chars, style, align, maxWidth);
+		return scale * typeface.getHeight(chars, style, align, maxWidth);
 	}
 
 	public Vec2i getSize(CharSequence chars, float maxWidth, Vec2i result) {
-		return typeface.getSize(chars, style, align, maxWidth, result);
+		result = typeface.getSize(chars, style, align, maxWidth, result);
+		result.mul(scale);
+		return result;
+	}
+	
+	public int getWidth(CharSequence chars) {
+		return getWidth(chars, Float.POSITIVE_INFINITY);
+	}
+
+	public int getHeight(CharSequence chars) {
+		return getHeight(chars, Float.POSITIVE_INFINITY);
+	}
+
+	public Vec2i getSize(CharSequence chars, Vec2i result) {
+		return getSize(chars, Float.POSITIVE_INFINITY, result);
 	}
 
 	public boolean supports(char c) {
@@ -106,7 +141,7 @@ public class Font {
 	 * @return the new font
 	 */
 	public Font withStyle(int style) {
-		return new Font(getTypeface(), style, getAlign(), getColor());
+		return new Font(getTypeface(), style, getAlign(), getColor(), getScale());
 	}
 
 	public Font deriveBold() {
@@ -158,15 +193,19 @@ public class Font {
 	}
 
 	public Font withAlign(float align) {
-		return new Font(getTypeface(), getStyle(), align, getColor());
+		return new Font(getTypeface(), getStyle(), align, getColor(), getScale());
 	}
 
 	public Font withColor(Vec4 color) {
-		return new Font(getTypeface(), getStyle(), getAlign(), color);
+		return new Font(getTypeface(), getStyle(), getAlign(), color, getScale());
 	}
 
 	public Font withColor(int color) {
-		return new Font(getTypeface(), getStyle(), getAlign(), color);
+		return new Font(getTypeface(), getStyle(), getAlign(), color, getScale());
+	}
+	
+	public Font withScale(int scale) {
+		return new Font(getTypeface(), getStyle(), getAlign(), getColor(), scale);
 	}
 
 }

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

@@ -45,7 +45,7 @@ public class GNUUnifontLoader {
 
 	private static final AtlasGroup ATLAS_GROUP_GNU_UNIFONT = new AtlasGroup("GNUUnifont", 1 << 12);
 
-	private static final TextureSettings TEXTURE_SETTINGS = new TextureSettings(false, false);
+	private static final TextureSettings TEXTURE_SETTINGS = new TextureSettings(false);
 
 	private static final int BITS_PER_HEX_DIGIT = 4;
 	private static final int PREFIX_LENGTH = "0000:".length();

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

@@ -1,28 +0,0 @@
-package ru.windcorp.progressia.client.graphics.gui;
-
-import glm.mat._4.Mat4;
-import glm.vec._3.Vec3;
-import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
-import ru.windcorp.progressia.client.graphics.texture.Texture;
-
-public class Background extends GUILayer {
-
-	protected Texture backgroundTexture;
-	
-	public Background(String name, Layout layout, Texture inTexture) {
-		super(name, layout);
-		
-		backgroundTexture = inTexture;
-	}
-	
-	@Override
-	protected void assemble(RenderTarget target) {
-		getRoot().setBounds(0, 0, getWidth(), getHeight());
-		getRoot().invalidate();
-		target.pushTransform(new Mat4(1).translate(new Vec3(0,0,500)));
-		target.drawTexture(0, 0, getWidth(), getHeight(), backgroundTexture);
-		target.popTransform();
-		getRoot().assemble(target);
-	}
-
-}

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

@@ -48,7 +48,9 @@ public abstract class BasicButton extends Component {
 		this.label = label;
 
 		setLayout(new LayoutAlign(10));
-		addChild(this.label);
+		if (label != null) {
+			addChild(this.label);
+		}
 
 		setFocusable(true);
 		reassembleAt(ARTrigger.HOVER, ARTrigger.FOCUS, ARTrigger.ENABLE);
@@ -151,5 +153,9 @@ public abstract class BasicButton extends Component {
 	public Label getLabel() {
 		return label;
 	}
+	
+	public boolean hasLabel() {
+		return label != null;
+	}
 
 }

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

@@ -23,12 +23,11 @@ import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
 import ru.windcorp.progressia.client.graphics.font.Font;
 import ru.windcorp.progressia.client.graphics.Colors;
 
-/** Class for a traditional button that gets clicked to activate
- *
- * @author opfromthestart
- */
 public class Button extends BasicButton {
 
+	public static final int MARGIN = 2;
+	public static final int BORDER = 2;
+
 	public Button(String name, String label, Font labelFont) {
 		super(name, label, labelFont);
 	}
@@ -55,22 +54,32 @@ public class Button extends BasicButton {
 
 		// Inside area
 
-		if (!isPressed())  {
+		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);
+			target.fill(
+				getX() + MARGIN,
+				getY() + MARGIN,
+				getWidth() - 2 * MARGIN,
+				getHeight() - 2 * MARGIN,
+				backgroundColor
+			);
 		}
 
 		// Change label font color
 
-		if (isPressed()) {
+		if (hasLabel()) {
-			getLabel().setFont(getLabel().getFont().withColor(Colors.WHITE));
+			if (isPressed()) {
-		} else {
+				getLabel().setFont(getLabel().getFont().withColor(Colors.WHITE));
-			getLabel().setFont(getLabel().getFont().withColor(Colors.BLACK));
+			} else {
+				getLabel().setFont(getLabel().getFont().withColor(Colors.BLACK));
+			}
 		}
 	}
 

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

@@ -30,7 +30,9 @@ 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.AssembledFlatRenderHelper;
 import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
+import ru.windcorp.progressia.client.graphics.flat.RenderTarget.Clip;
 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;
@@ -43,6 +45,7 @@ import ru.windcorp.progressia.client.graphics.input.KeyEvent;
 import ru.windcorp.progressia.client.graphics.input.KeyMatcher;
 import ru.windcorp.progressia.client.graphics.input.bus.InputBus;
 import ru.windcorp.progressia.client.graphics.input.bus.InputListener;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
 import ru.windcorp.progressia.common.util.Named;
 import ru.windcorp.progressia.common.util.crash.CrashReports;
 import ru.windcorp.progressia.common.util.crash.ReportingEventBus;
@@ -557,9 +560,7 @@ public class Component extends Named {
 	}
 
 	public void removeInputListener(InputListener<?> listener) {
-		if (inputBus != null) {
+		inputBus.unregister(listener);
-			inputBus.unregister(listener);
-		}
 	}
 	
 	protected boolean passInputToChildren(InputEvent e) {
@@ -761,6 +762,20 @@ public class Component extends Named {
 		}
 
 	}
+	
+	public Renderable assembleToRenderable() {
+		
+		RenderTarget target = new RenderTarget();
+		assemble(target);
+		Clip[] clips = target.assemble();
+		
+		return renderer -> {
+			for (Clip clip : clips) {
+				clip.render((AssembledFlatRenderHelper) renderer);
+			}
+		};
+		
+	}
 
 	// /**
 	// * Returns a component that displays this component in its center.

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

@@ -0,0 +1,37 @@
+/*
+ * 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.function.BooleanSupplier;
+
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
+
+public class Components {
+	
+	public static Component center(Component c) {
+		return new Group(c.getName() + ".Centerer", new LayoutAlign(), c);
+	}
+	
+	public static Component hide(Component c, BooleanSupplier shouldHide) {
+		return new Hider(c.getName() + ".Hider", c, shouldHide);
+	}
+
+	private Components() {
+	}
+
+}

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

@@ -33,7 +33,7 @@ public class DynamicLabel extends Component {
 		super(name);
 		this.font = font;
 		this.contents = contents;
-		setPreferredSize(width, font.getHeight("", Float.POSITIVE_INFINITY) * 2);
+		setPreferredSize(width, font.getHeight("", Float.POSITIVE_INFINITY));
 	}
 
 	public Font getFont() {
@@ -46,7 +46,7 @@ public class DynamicLabel extends Component {
 
 	@Override
 	protected void assembleSelf(RenderTarget target) {
-		target.pushTransform(new Mat4().identity().translate(getX(), getY(), -1000).scale(2));
+		target.pushTransform(new Mat4().identity().translate(getX(), getY(), -1000));
 		target.addCustomRenderer(font.assembleDynamic(getContentSupplier(), Float.POSITIVE_INFINITY));
 		target.popTransform();
 	}

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

@@ -24,5 +24,13 @@ public class Group extends Component {
 		super(name);
 		setLayout(layout);
 	}
+	
+	public Group(String name, Layout layout, Component... children) {
+		this(name, layout);
+		
+		for (Component child : children) {
+			addChild(child);
+		}
+	}
 
 }

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

@@ -0,0 +1,65 @@
+/*
+ * 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.function.BooleanSupplier;
+
+import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutFill;
+import ru.windcorp.progressia.client.graphics.input.InputEvent;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+
+public class Hider extends Component {
+
+	private final BooleanSupplier shouldHide;
+	private final Component contents;
+
+	public Hider(String name, Component contents, BooleanSupplier shouldHide) {
+		super(name);
+		this.contents = contents;
+		this.shouldHide = shouldHide;
+		
+		setLayout(new LayoutFill());
+		addChild(contents);
+	}
+	
+	@Override
+	protected boolean passInputToChildren(InputEvent e) {
+		return !shouldHide.getAsBoolean();
+	}
+	
+	@Override
+	public synchronized Component findFocused() {
+		if (shouldHide.getAsBoolean()) {
+			return null;
+		}
+		
+		return super.findFocused();
+	}
+	
+	@Override
+	protected void assembleChildren(RenderTarget target) {
+		Renderable renderable = contents.assembleToRenderable();
+		target.addCustomRenderer(renderer -> {
+			if (!shouldHide.getAsBoolean()) {
+				renderable.render(renderer);
+			}
+		});
+	}
+
+}

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

@@ -70,7 +70,7 @@ public class Label extends Component {
 
 	public void update() {
 		currentText = contents.get();
-		currentSize = font.getSize(currentText, maxWidth, null).mul(2);
+		currentSize = font.getSize(currentText, maxWidth, null);
 		requestReassembly();
 	}
 
@@ -99,12 +99,8 @@ public class Label extends Component {
 	protected void assembleSelf(RenderTarget target) {
 		float startX = getX() + font.getAlign() * (getWidth() - currentSize.x);
 
-		target.pushTransform(
+		target.pushTransform(new Mat4().identity().translate(startX, getY(), 0));
-			new Mat4().identity().translate(startX, getY(), 0).scale(2)
-		);
-
 		target.addCustomRenderer(font.assemble(currentText, maxWidth));
-
 		target.popTransform();
 	}
 

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

@@ -1,23 +0,0 @@
-package ru.windcorp.progressia.client.graphics.gui;
-
-import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
-import ru.windcorp.progressia.client.graphics.texture.Texture;
-
-public class TextureComponent extends Component {
-	
-	private final Texture texture;
-
-	public TextureComponent(String name, Texture texture2) {
-		super(name);
-		
-		texture = texture2;
-		setPreferredSize(texture.getSprite().getWidth(),texture.getSprite().getHeight());
-	}
-	
-	@Override
-	protected void assembleSelf(RenderTarget target)
-	{
-		target.drawTexture(getX(), getY(), getWidth(), getHeight(), texture);
-	}
-
-}

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

@@ -27,8 +27,8 @@ import ru.windcorp.progressia.client.graphics.gui.Layout;
 
 public class LayoutAlign implements Layout {
 
-	protected final int margin;
+	private final int margin;
-	protected double alignX, alignY;
+	private double alignX, alignY;
 
 	public LayoutAlign(double alignX, double alignY, int margin) {
 		this.alignX = alignX;
@@ -72,7 +72,7 @@ public class LayoutAlign implements Layout {
 		Vec2i result = new Vec2i(0, 0);
 
 		c.getChildren().stream()
-			.map(Component::getPreferredSize)
+			.map(child -> child.getPreferredSize())
 			.forEach(size -> {
 				result.x = max(size.x, result.x);
 				result.y = max(size.y, result.y);

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

@@ -1,56 +0,0 @@
-package ru.windcorp.progressia.client.graphics.gui.layout;
-
-import glm.vec._2.i.Vec2i;
-import ru.windcorp.progressia.client.graphics.gui.Component;
-import ru.windcorp.progressia.client.graphics.gui.Layout;
-import static java.lang.Math.max;
-import static java.lang.Math.min;
-
-public class LayoutEdges implements Layout {
-
-    private final int margin;
-
-    public LayoutEdges(int margin) {
-        this.margin = margin;
-    }
-
-    @Override
-    public void layout(Component c) {
-        for (int i=0;i<2;i++)
-        {
-            Component child = c.getChild(i);
-
-            Vec2i size = child.getPreferredSize();
-
-            int cWidth = c.getWidth() - 2 * margin;
-            int cHeight = c.getHeight() - 2 * margin;
-
-            size.x = min(size.x, cWidth);
-            size.y = min(size.y, cHeight);
-
-            if (i==0) {
-                child.setBounds(
-                        c.getX() + margin,
-                        c.getY(),
-                        size
-                );
-            } else {
-                child.setBounds(
-                        1920 - size.x - margin,
-                        c.getY(),
-                        size
-                );
-            }
-
-        }
-    }
-
-    @Override
-    public Vec2i calculatePreferredSize(Component c) {
-        Vec2i result = new Vec2i(1920,0);
-        c.getChildren().stream()
-                .map(Component::getPreferredSize)
-                .forEach(size -> result.y = max(Math.abs(size.y), result.y));
-        return result;
-    }
-}

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

@@ -125,6 +125,36 @@ public class Shapes {
 
 		return result;
 	}
+	
+	public static Shape createParallelogram(
+		// Try saying that 10 times fast
+		ShapeRenderProgram program,
+
+		Vec3 origin,
+
+		Vec3 width,
+		Vec3 height,
+
+		Vec4 colorMultiplier,
+
+		Texture texture
+	) {
+		Shape result = new Shape(
+			Usage.STATIC,
+			program,
+			ShapeParts.createRectangle(
+				program,
+				texture,
+				colorMultiplier,
+				origin,
+				width,
+				height,
+				false
+			)
+		);
+
+		return result;
+	}
 
 	public static class PppBuilder {
 
@@ -315,4 +345,108 @@ public class Shapes {
 
 	}
 
+	public static class PgmBuilder {
+		
+		private final ShapeRenderProgram program;
+
+		private final Vec3 origin = new Vec3(0, 0, 0);
+
+		private final Vec3 width = new Vec3(1, 0, 0);
+		private final Vec3 height = new Vec3(0, 1, 0);
+
+		private final Vec4 colorMultiplier = new Vec4(1, 1, 1, 1);
+
+		private final Texture texture;
+
+		public PgmBuilder(ShapeRenderProgram program, Texture texture) {
+			this.program = program;
+			this.texture = texture;
+		}
+
+		public PgmBuilder setOrigin(Vec3 origin) {
+			this.origin.set(origin);
+			return this;
+		}
+
+		public PgmBuilder setOrigin(float x, float y, float z) {
+			this.origin.set(x, y, z);
+			return this;
+		}
+
+		public PgmBuilder setColorMultiplier(Vec4 colorMultiplier) {
+			this.colorMultiplier.set(colorMultiplier);
+			return this;
+		}
+
+		public PgmBuilder setColorMultiplier(float r, float g, float b) {
+			this.colorMultiplier.set(r, g, b, 1);
+			return this;
+		}
+
+		public PgmBuilder setColorMultiplier(float r, float g, float b, float a) {
+			this.colorMultiplier.set(r, g, b, a);
+			return this;
+		}
+
+		public PgmBuilder setWidth(Vec3 vector) {
+			this.width.set(vector);
+			return this;
+		}
+
+		public PgmBuilder setWidth(float x, float y, float z) {
+			this.width.set(x, y, z);
+			return this;
+		}
+
+		public PgmBuilder setWidth(float x) {
+			this.width.set(x, 0, 0);
+			return this;
+		}
+
+		public PgmBuilder setHeight(Vec3 vector) {
+			this.height.set(vector);
+			return this;
+		}
+
+		public PgmBuilder setHeight(float x, float y, float z) {
+			this.height.set(x, y, z);
+			return this;
+		}
+
+		public PgmBuilder setHeight(float y) {
+			this.height.set(0, y, 0);
+			return this;
+		}
+
+		public PgmBuilder setSize(float x, float y) {
+			return this.setWidth(x).setHeight(y);
+		}
+
+		public PgmBuilder setSize(float size) {
+			return this.setSize(size, size);
+		}
+		
+		public PgmBuilder centerAt(float x, float y, float z) {
+			origin.set(x, y, z);
+			
+			origin.mul(2);
+			origin.sub(width);
+			origin.div(2);
+			
+			return this;
+		}
+
+		public Shape create() {
+			return createParallelogram(
+				program,
+				origin,
+				width,
+				height,
+				colorMultiplier,
+				texture
+			);
+		}
+		
+	}
+	
 }

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

@@ -163,7 +163,7 @@ public class Atlases {
 		}
 	}
 
-	private static final TextureSettings SETTINGS = new TextureSettings(false, false);
+	private static final TextureSettings SETTINGS = new TextureSettings(false);
 
 	private static final Map<Resource, Sprite> LOADED = new HashMap<>();
 	private static final Multimap<AtlasGroup, Atlas> ATLASES = MultimapBuilder.hashKeys().arrayListValues().build();

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

@@ -28,7 +28,7 @@ import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class SimpleTextures {
 
-	private static final TextureSettings SETTINGS = new TextureSettings(false, false);
+	private static final TextureSettings SETTINGS = new TextureSettings(false);
 
 	private static final Map<Resource, Texture> TEXTURES = new HashMap<>();
 

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

@@ -23,7 +23,7 @@ import static org.lwjgl.opengl.GL12.*;
 
 import java.nio.ByteBuffer;
 
-public class TextureData {
+class TextureData {
 
 	private final ByteBuffer data;
 

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

@@ -41,17 +41,9 @@ public class TextureLoader {
 
 		int width = readResult.getWidth();
 		int height = readResult.getHeight();
-		
-		int bufferWidth;
-		int bufferHeight;
 
-		if (settings.allocateExactBuffer()) {
+		int bufferWidth = BinUtil.roundToGreaterPowerOf2(width);
-			bufferWidth = width;
+		int bufferHeight = BinUtil.roundToGreaterPowerOf2(height);
-			bufferHeight = height;
-		} else {
-			bufferWidth = BinUtil.roundToGreaterPowerOf2(width);
-			bufferHeight = BinUtil.roundToGreaterPowerOf2(height);
-		}
 
 		WritableRaster raster = TextureUtil.createRaster(
 			bufferWidth,

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

@@ -21,19 +21,13 @@ package ru.windcorp.progressia.client.graphics.texture;
 public class TextureSettings {
 
 	private final boolean isFiltered;
-	private final boolean allocateExactBuffer;
 
-	public TextureSettings(boolean isFiltered, boolean allocateExactBuffer) {
+	public TextureSettings(boolean isFiltered) {
 		this.isFiltered = isFiltered;
-		this.allocateExactBuffer = allocateExactBuffer;
 	}
 
 	public boolean isFiltered() {
 		return isFiltered;
 	}
-	
-	public boolean allocateExactBuffer() {
-		return allocateExactBuffer;
-	}
 
 }

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

@@ -15,20 +15,25 @@
  * 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.world;
 
+import org.apache.logging.log4j.LogManager;
+
 import ru.windcorp.progressia.client.Client;
+import ru.windcorp.progressia.client.events.ClientEvent;
+import ru.windcorp.progressia.client.events.NewLocalEntityEvent;
 import ru.windcorp.progressia.client.world.WorldRender;
 import ru.windcorp.progressia.client.world.entity.EntityRenderable;
 import ru.windcorp.progressia.common.world.entity.EntityData;
+import ru.windcorp.progressia.common.world.entity.EntityDataPlayer;
 
 public class LocalPlayer {
 
 	private final Client client;
 
 	private long entityId = EntityData.NULL_ENTITY_ID;
-	private EntityData lastKnownEntity = null;
+	private EntityDataPlayer lastKnownEntity = null;
 
 	private final Selection selection = new Selection();
 
@@ -59,19 +64,32 @@ public class LocalPlayer {
 		return getEntity() != null;
 	}
 
-	public EntityData getEntity() {
+	public EntityDataPlayer getEntity() {
 		if (!hasEntityId()) {
 			return null;
 		}
 
 		EntityData entity = getClient().getWorld().getData().getEntity(getEntityId());
+		EntityDataPlayer playerEntity;
 
-		if (entity != lastKnownEntity) {
+		if (entity == null || entity instanceof EntityDataPlayer) {
-			getClient().onLocalPlayerEntityChanged(entity, lastKnownEntity);
+			playerEntity = (EntityDataPlayer) entity;
-			this.lastKnownEntity = entity;
+		} else {
+			LogManager.getLogger().warn(
+				"Entity ID of local player is {}, but the entity is not an EntityDataPlayer: {}",
+				EntityData.formatEntityId(getEntityId()),
+				entity
+			);
+			playerEntity = null;
 		}
 
-		return entity;
+		if (playerEntity != lastKnownEntity) {
+			ClientEvent event = new NewLocalEntityEvent.Immutable(getClient(), playerEntity, lastKnownEntity);
+			this.lastKnownEntity = playerEntity;
+			getClient().postEvent(event);
+		}
+
+		return playerEntity;
 	}
 
 	public Selection getSelection() {

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/Bar.java

@@ -0,0 +1,113 @@
+/*
+ * 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.world.hud;
+
+import glm.vec._3.Vec3;
+import glm.vec._4.Vec4;
+import ru.windcorp.jputil.functions.FloatSupplier;
+import ru.windcorp.progressia.client.graphics.Colors;
+import ru.windcorp.progressia.client.graphics.backend.Usage;
+import ru.windcorp.progressia.client.graphics.flat.FlatRenderProgram;
+import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.Shape;
+import ru.windcorp.progressia.client.graphics.model.ShapeParts;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
+
+public class Bar extends Component {
+	
+	private static final int THICKNESS = 5;
+
+	private final boolean isVertical;
+
+	private final FloatSupplier value;
+	private final FloatSupplier maxValue;
+	
+	private final Vec4 color;
+	private final Vec4 backgroundColor;
+
+	private static Renderable unitSquare = null;
+
+	public Bar(String name, boolean isVertical, Vec4 color, FloatSupplier value, FloatSupplier maxValue) {
+		super(name);
+		this.isVertical = isVertical;
+		this.value = value;
+		this.maxValue = maxValue;
+		
+		this.color = color;
+		this.backgroundColor = Colors.mix(color, Colors.WHITE, 0.75f, null);
+
+		if (unitSquare == null) {
+			unitSquare = new Shape(
+				Usage.STATIC,
+				FlatRenderProgram.getDefault(),
+				ShapeParts.createRectangle(
+					FlatRenderProgram.getDefault(),
+					null,
+					Colors.WHITE,
+					new Vec3(0, 0, 0),
+					new Vec3(1, 0, 0),
+					new Vec3(0, 1, 0),
+					false
+				)
+			);
+		}
+
+		setPreferredSize(THICKNESS, THICKNESS);
+	}
+
+	@Override
+	protected void assembleSelf(RenderTarget target) {
+		target.addCustomRenderer(this::renderSelf);
+	}
+
+	private void renderSelf(ShapeRenderHelper renderer) {
+		renderer.pushTransform()
+			.translate(getX(), getY(), 0)
+			.scale(getWidth(), getHeight(), 1);
+		
+		float length = value.getAsFloat() / maxValue.getAsFloat();
+		if (length < 0) {
+			length = 0;
+		} else if (length > 1) {
+			length = 1;
+		}
+		
+		// TODO why is the order reverse????
+		renderRectangle(renderer, color, length);
+		renderRectangle(renderer, backgroundColor, 1);
+		
+		renderer.popTransform();
+	}
+	
+	private void renderRectangle(ShapeRenderHelper renderer, Vec4 color, float length) {
+		renderer.pushColorMultiplier().mul(color);
+		if (length != 1) {
+			renderer.pushTransform().scale(isVertical ? 1 : length, isVertical ? length : 1, 1);
+		}
+		
+		unitSquare.render(renderer);
+		
+		if (length != 1) {
+			renderer.popTransform();
+		}
+		renderer.popColorMultiplier();
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/CursorHUD.java

@@ -0,0 +1,151 @@
+/*
+ * 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.world.hud;
+
+import glm.vec._2.i.Vec2i;
+import ru.windcorp.progressia.client.graphics.ExponentAnimation;
+import ru.windcorp.progressia.client.graphics.backend.InputTracker;
+import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
+import ru.windcorp.progressia.client.world.entity.SpeciesRender;
+import ru.windcorp.progressia.client.world.entity.SpeciesRenderRegistry;
+import ru.windcorp.progressia.common.world.entity.EntityDataPlayer;
+import ru.windcorp.progressia.common.world.entity.SpeciesData.Hand;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainerHand;
+
+public class CursorHUD extends Component {
+
+	private class CursorBoundSlot {
+
+		private final SlotComponent component;
+		private final Renderable renderable;
+
+		/**
+		 * 0 is not selected, 1 is selected
+		 */
+		private final ExponentAnimation selection = new ExponentAnimation(10, 0);
+		private final double angle;
+
+		public CursorBoundSlot(SlotComponent component, double angle) {
+			this.component = component;
+			this.angle = angle;
+
+			Vec2i size = component.getPreferredSize();
+			component.setBounds(-size.x / 2, -size.y / 2, size);
+
+			this.renderable = component.assembleToRenderable();
+			
+			if (player.getHandCount() == 1) {
+				// Disable opening animation hint
+				selection.setValue(1);
+			}
+		}
+
+		public void render(ShapeRenderHelper renderer) {
+
+			float target = player.getSelectedHand() == component.getSlot().getContainer() ? 1 : 0;
+			float sel = selection.updateForFrame(target);
+
+			float distance = CursorHUD.this.distance * (1 - sel);
+			float x = (float) Math.cos(angle) * distance;
+			float y = (float) Math.sin(angle) * distance;
+			float scale = 0.5f + 0.5f * sel;
+
+			renderer.pushTransform().translate(x, y, 0).scale(scale);
+
+			boolean popColor = false;
+			if (sel > 0.5f && component.getSlot().isEmpty()) {
+				renderer.pushColorMultiplier().mul(1, 1, 1, 1 - 2 * (sel - 0.5f));
+				popColor = true;
+			}
+
+			renderable.render(renderer);
+
+			if (popColor) {
+				renderer.popColorMultiplier();
+			}
+
+			renderer.popTransform();
+
+		}
+
+	}
+
+	private final EntityDataPlayer player;
+	
+	private final float distance = 50;
+	private final double startAngle = Math.PI / 4;
+	private final double endAngle = -3 * Math.PI / 4;
+
+	private final CursorBoundSlot[] slots;
+
+	public CursorHUD(String name, EntityDataPlayer player) {
+		super(name);
+		this.player = player;
+
+		this.slots = new CursorBoundSlot[player.getHandCount()];
+		
+		// This produces NaN when there is only one hand, but then it is unused
+		double angleStep = (endAngle - startAngle) / (slots.length - 1);
+
+		double angle = startAngle;
+		for (int i = 0; i < slots.length; ++i) {
+
+			SpeciesRender speciesRender = SpeciesRenderRegistry.getInstance().get(player);
+
+			ItemContainerHand container = player.getHand(i);
+			Hand hand = container.getHand();
+
+			SlotComponent component = new SlotComponent(name + ".Hand" + hand.getName(), container, 0)
+				.setBackground(speciesRender.getHandBackground(hand));
+			
+			addChild(component);
+			
+			slots[i] = new CursorBoundSlot(component, angle);
+			
+			angle += angleStep;
+			
+		}
+
+		setLayout(null);
+	}
+
+	@Override
+	protected void assembleChildren(RenderTarget target) {
+
+		target.addCustomRenderer(renderer -> {
+
+			renderer.pushTransform().translate(
+				(float) InputTracker.getCursorX(),
+				(float) InputTracker.getCursorY(),
+				0
+			);
+
+			for (CursorBoundSlot slot : slots) {
+				slot.render(renderer);
+			}
+
+			renderer.popTransform();
+
+		});
+
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/HUDManager.java

@@ -0,0 +1,125 @@
+/*
+ * 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.world.hud;
+
+import com.google.common.eventbus.Subscribe;
+
+import ru.windcorp.progressia.client.Client;
+import ru.windcorp.progressia.client.events.NewLocalEntityEvent;
+import ru.windcorp.progressia.client.graphics.GUI;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.world.item.inventory.InventoryComponent;
+import ru.windcorp.progressia.client.world.item.inventory.InventoryRender;
+import ru.windcorp.progressia.client.world.item.inventory.InventoryRenderRegistry;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
+import ru.windcorp.progressia.common.world.item.inventory.Inventory;
+import ru.windcorp.progressia.common.world.item.inventory.event.InventoryClosingEvent;
+import ru.windcorp.progressia.common.world.item.inventory.event.InventoryOpenedEvent;
+
+public class HUDManager implements HUDWorkspace {
+	
+	private final Client client;
+	private final LayerHUD layer;
+	
+	public HUDManager(Client client) {
+		this.client = client;
+		this.layer = new LayerHUD(this);
+		client.subscribe(new Object() {
+			@Subscribe
+			public void onLocalEntityChanged(NewLocalEntityEvent e) {
+				if (e.getNewEntity() != null) {
+					e.getNewEntity().subscribe(HUDManager.this);
+				}
+				if (e.getPreviousEntity() != null) {
+					e.getPreviousEntity().unsubscribe(HUDManager.this);
+				}
+			}
+		});
+	}
+	
+	public void install() {
+		GUI.addTopLayer(layer);
+	}
+	
+	public void remove() {
+		GUI.removeLayer(layer);
+	}
+	
+	@Override
+	public void openInventory(InventoryComponent component) {
+		InventoryWindow window = new InventoryWindow("Window", component, this);
+		layer.getWindowManager().addWindow(window);
+	}
+	
+	public void closeEverything() {
+		System.err.println("closeEverything NYI");
+	}
+	
+	public boolean isHidden() {
+		return layer.isHidden();
+	}
+	
+	public void setHidden(boolean hide) {
+		layer.setHidden(hide);
+	}
+	
+	public boolean isInventoryShown() {
+		return layer.isInventoryShown();
+	}
+
+	public void setInventoryShown(boolean showInventory) {
+		layer.setInventoryShown(showInventory);
+	}
+
+	@Override
+	public Client getClient() {
+		return client;
+	}
+	
+	@Subscribe
+	private void onInventoryOpened(InventoryOpenedEvent event) {
+		Inventory inventory = event.getInventory();
+		InventoryRender render = InventoryRenderRegistry.getInstance().get(inventory.getId());
+		
+		if (render == null) {
+			throw CrashReports.report(null, "InventoryRender not found for ID %s", inventory.getId());
+		}
+		
+		try {
+			InventoryComponent component = render.createComponent(inventory, this);
+			openInventory(component);
+		} catch (Exception e) {
+			throw CrashReports.report(e, "Could not open inventory %s", inventory.getId());
+		}
+	}
+	
+	@Subscribe
+	private void onInventoryClosing(InventoryClosingEvent event) {
+		Inventory inventory = event.getInventory();
+		
+		for (Component component : layer.getWindowManager().getChildren()) {
+			if (component instanceof InventoryWindow) {
+				InventoryWindow window = (InventoryWindow) component;
+				if (window.getContent().getInventory() == inventory) {
+					layer.getWindowManager().closeWindow(window);
+				}
+			}
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/HUDTextures.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.world.hud;
+
+import java.io.IOException;
+
+import ru.windcorp.progressia.client.graphics.texture.Atlases;
+import ru.windcorp.progressia.client.graphics.texture.SimpleTexture;
+import ru.windcorp.progressia.client.graphics.texture.Texture;
+import ru.windcorp.progressia.client.graphics.texture.Atlases.AtlasGroup;
+import ru.windcorp.progressia.common.resource.ResourceManager;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
+
+public class HUDTextures {
+
+	private static final AtlasGroup HUD_ATLAS_GROUP = new AtlasGroup("HUD", 1 << 12);
+	
+	private static ItemAmountTypeface itemAmountTypeface = null;
+
+	public static Texture getHUDTexture(String name) {
+		return new SimpleTexture(
+			Atlases.getSprite(
+				ResourceManager.getTextureResource("gui/" + name),
+				HUD_ATLAS_GROUP
+			)
+		);
+	}
+
+	public static AtlasGroup getHUDAtlasGroup() {
+		return HUD_ATLAS_GROUP;
+	}
+	
+	public static ItemAmountTypeface getItemAmountTypeface() {
+		return itemAmountTypeface;
+	}
+	
+	public static void loadItemAmountTypeface() {
+		try {
+			itemAmountTypeface = new ItemAmountTypeface();
+		} catch (IOException e) {
+			throw CrashReports.report(e, "Could not load item amount typeface");
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/HUDWorkspace.java

@@ -0,0 +1,44 @@
+/*
+ * 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.world.hud;
+
+import ru.windcorp.progressia.client.Client;
+import ru.windcorp.progressia.client.graphics.world.LocalPlayer;
+import ru.windcorp.progressia.client.world.item.inventory.InventoryComponent;
+import ru.windcorp.progressia.common.world.entity.EntityDataPlayer;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainerHand;
+
+public interface HUDWorkspace {
+	
+	Client getClient();
+	
+	default LocalPlayer getPlayer() {
+		return getClient().getLocalPlayer();
+	}
+	
+	default EntityDataPlayer getPlayerEntity() {
+		return getClient().getLocalPlayer().getEntity();
+	}
+	
+	default ItemContainerHand getHand() {
+		return getClient().getLocalPlayer().getEntity().getSelectedHand();
+	}
+	
+	void openInventory(InventoryComponent component);
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/HandsHUD.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.client.graphics.world.hud;
+
+import java.util.Arrays;
+import java.util.Map;
+
+import com.google.common.collect.Maps;
+
+import glm.vec._2.i.Vec2i;
+import ru.windcorp.progressia.client.graphics.ExponentAnimation;
+import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.gui.Group;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutBorderHorizontal;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutHorizontal;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.world.entity.SpeciesRender;
+import ru.windcorp.progressia.client.world.entity.SpeciesRenderRegistry;
+import ru.windcorp.progressia.common.world.entity.EntityDataPlayer;
+import ru.windcorp.progressia.common.world.entity.SpeciesData.Hand;
+
+public class HandsHUD extends Component {
+
+	public class ScaledSlotComponent extends Component {
+
+		private final SlotComponent slotComponent;
+		private final ExponentAnimation selected = new ExponentAnimation(10, 1);
+
+		public ScaledSlotComponent(SlotComponent component) {
+			super(component.getName() + ".Scaled");
+			this.slotComponent = component;
+			addChild(component);
+			
+			Vec2i size = slotComponent.getPreferredSize();
+			setPreferredSize(size.x * 2, size.y * 2);
+			slotComponent.setBounds(-size.x / 2, 0, size);
+		}
+
+		@Override
+		protected void assembleChildren(RenderTarget target) {
+			Renderable renderable = slotComponent.assembleToRenderable();
+
+			target.addCustomRenderer(renderer -> {
+				float scale = manager.getHand() == slotComponent.getSlot().getContainer() ? 2 : 1;
+				renderer.pushTransform()
+					.translate(getX() + getWidth() / 2, getY(), 0)
+					.scale(selected.updateForFrame(scale));
+
+				renderable.render(renderer);
+
+				renderer.popTransform();
+			});
+		}
+
+	}
+
+	public enum Side {
+		LEFT("Left", LayoutBorderHorizontal.LEFT, 0.0),
+		RIGHT("Right", LayoutBorderHorizontal.RIGHT, 1.0),
+		CENTER("Center", LayoutBorderHorizontal.CENTER, 0.5);
+
+		private final String ccName;
+		private final Object lbhHint;
+		private final double align;
+
+		private Side(String ccName, Object lbhHint, double align) {
+			this.ccName = ccName;
+			this.lbhHint = lbhHint;
+			this.align = align;
+		}
+	}
+
+	private final HUDManager manager;
+
+	public HandsHUD(String name, HUDManager manager) {
+		super(name);
+		this.manager = manager;
+
+		EntityDataPlayer entity = manager.getPlayerEntity();
+		String speciesId = entity.getSpecies().getId();
+		SpeciesRender speciesRender = SpeciesRenderRegistry.getInstance().get(speciesId);
+
+		Map<Side, Component> containers = Maps.toMap(
+			Arrays.asList(Side.values()),
+			side -> new Group(name + "." + side.ccName, new LayoutHorizontal(15))
+		);
+
+		for (int i = 0; i < entity.getHandCount(); ++i) {
+
+			Hand hand = entity.getSpecies().getHands().get(i);
+
+			SlotComponent display = new SlotComponent(name + "." + hand.getName(), entity.getHand(i), 0)
+				.setBackground(speciesRender.getHandBackground(hand), this::shouldRenderHandPlaceholder)
+				.setScale(2);
+
+			Component scaledDisplay = new ScaledSlotComponent(display);
+
+			containers.get(speciesRender.getHandSide(hand)).addChild(scaledDisplay);
+
+		}
+
+		setLayout(new LayoutBorderHorizontal());
+
+		containers.forEach((side, comp) -> {
+			addChild(
+				new Group(name + "." + side.ccName + ".Aligner", new LayoutAlign(side.align, 0.5, 0), comp)
+					.setLayoutHint(side.lbhHint)
+			);
+		});
+
+	}
+
+	private boolean shouldRenderHandPlaceholder() {
+		return manager.isInventoryShown();
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/InteractiveSlotComponent.java

@@ -0,0 +1,181 @@
+/*
+ * 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.world.hud;
+
+import glm.vec._2.i.Vec2i;
+import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
+import ru.windcorp.progressia.client.graphics.gui.Button;
+import ru.windcorp.progressia.client.graphics.gui.Label;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutFill;
+import ru.windcorp.progressia.client.graphics.input.KeyEvent;
+import ru.windcorp.progressia.client.graphics.input.KeyMatcher;
+import ru.windcorp.progressia.client.graphics.input.WheelScrollEvent;
+import ru.windcorp.progressia.common.Units;
+import ru.windcorp.progressia.common.world.item.ItemDataContainer;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainer;
+import ru.windcorp.progressia.common.world.item.inventory.ItemSlot;
+import ru.windcorp.progressia.common.world.item.inventory.Items;
+
+public class InteractiveSlotComponent extends Button {
+
+	private static final double MIN_PICK_ALL_DELAY = Units.get("0.5 s");
+
+	private double lastMainAction = Double.NEGATIVE_INFINITY;
+
+	private final SlotComponent slotComponent;
+	private final HUDWorkspace workspace;
+
+	public InteractiveSlotComponent(String name, ItemContainer container, int index, HUDWorkspace workspace) {
+		this(name, new SlotComponent(name, container, index), workspace);
+	}
+
+	public InteractiveSlotComponent(SlotComponent component, HUDWorkspace workspace) {
+		this(component.getName() + ".Interactive", component, workspace);
+	}
+
+	public InteractiveSlotComponent(String name, SlotComponent component, HUDWorkspace workspace) {
+		super(name, (Label) null);
+		this.slotComponent = component;
+		this.workspace = workspace;
+
+		Vec2i size = slotComponent.getPreferredSize().add(2 * BORDER);
+		setPreferredSize(size);
+
+		addChild(this.slotComponent);
+		setLayout(new LayoutFill(MARGIN));
+
+		addListeners();
+	}
+
+	private void addListeners() {
+		addAction(button -> onMainAction());
+
+		addKeyListener(KeyMatcher.RMB, this::onAltAction);
+
+		addInputListener(WheelScrollEvent.class, event -> {
+			if (event.hasVerticalMovement()) {
+				onSingleMoveAction(event.isDown());
+				event.consume();
+			}
+		});
+	}
+
+	private void onMainAction() {
+		ItemSlot handSlot = workspace.getHand().slot();
+		ItemSlot invSlot = getSlot();
+		if (invSlot == null) {
+			return;
+		}
+
+		boolean success = false;
+
+		double now = GraphicsInterface.getTime();
+		if (now - lastMainAction < MIN_PICK_ALL_DELAY) {
+			lastMainAction = Double.NEGATIVE_INFINITY;
+			pickAll(handSlot);
+			success = true;
+		} else {
+			lastMainAction = now;
+		}
+
+		if (!success) {
+			success = Items.pour(handSlot, invSlot) != 0;
+		}
+
+		if (!success) {
+			success = Items.swap(handSlot, invSlot);
+		}
+
+		if (!success && handSlot.isEmpty()) {
+			success = Items.pour(invSlot, handSlot) != 0;
+		}
+
+		if (success) {
+			requestReassembly();
+		}
+	}
+
+	private void pickAll(ItemSlot handSlot) {
+		int maxIndex = getSlot().getContainer().getMaxIndex();
+		for (int index = 0; index < maxIndex; ++index) {
+			Items.pour(new ItemSlot(getSlot().getContainer(), index), handSlot);
+			if (handSlot.isEmpty()) {
+				break;
+			}
+		}
+	}
+
+	private void onAltAction(KeyEvent e) {
+		ItemSlot handSlot = workspace.getHand().slot();
+		ItemSlot invSlot = getSlot();
+		if (invSlot == null) {
+			return;
+		}
+		
+		boolean success = false;
+
+		if (handSlot.isEmpty()) {
+			success = tryToOpen(invSlot);
+		}
+
+		if (!success && handSlot.isEmpty()) {
+			success = Items.pour(invSlot, handSlot, invSlot.getCount() / 2) != 0;
+		}
+
+		if (!success) {
+			success = Items.pour(handSlot, invSlot, 1) != 0;
+		}
+
+		if (!success) {
+			success = Items.swap(handSlot, invSlot);
+		}
+
+		if (success) {
+			requestReassembly();
+		}
+	}
+
+	private boolean tryToOpen(ItemSlot invSlot) {
+		if (invSlot.getCount() != 1) {
+			return false;
+		}
+		if (!(invSlot.getItem() instanceof ItemDataContainer)) {
+			return false;
+		}
+
+		ItemDataContainer item = (ItemDataContainer) invSlot.getItem();
+		return item.open(workspace.getPlayerEntity()) != null;
+	}
+
+	private void onSingleMoveAction(boolean fromHand) {
+		ItemSlot handSlot = workspace.getHand().slot();
+		ItemSlot invSlot = getSlot();
+
+		ItemSlot from = fromHand ? handSlot : invSlot;
+		ItemSlot into = fromHand ? invSlot : handSlot;
+
+		if (Items.pour(from, into, 1) != 0) {
+			requestReassembly();
+		}
+	}
+
+	public ItemSlot getSlot() {
+		return slotComponent.getSlot();
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/InventoryHUD.java

@@ -0,0 +1,88 @@
+/*
+ * 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.world.hud;
+
+import java.util.Arrays;
+import java.util.Map;
+
+import com.google.common.collect.Maps;
+
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.gui.Group;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutBorderHorizontal;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutVertical;
+import ru.windcorp.progressia.client.world.entity.SpeciesRender;
+import ru.windcorp.progressia.client.world.entity.SpeciesRenderRegistry;
+import ru.windcorp.progressia.common.world.entity.EntityDataPlayer;
+import ru.windcorp.progressia.common.world.entity.SpeciesData.EquipmentSlot;
+
+public class InventoryHUD extends Component {
+
+	public enum Side {
+		LEFT("Left", LayoutBorderHorizontal.LEFT),
+		RIGHT("Right", LayoutBorderHorizontal.RIGHT);
+
+		private final String ccName;
+		private final Object lbhHint;
+
+		private Side(String ccName, Object lbhHint) {
+			this.ccName = ccName;
+			this.lbhHint = lbhHint;
+		}
+	}
+
+	public InventoryHUD(String name, HUDWorkspace workspace) {
+		super(name);
+		setLayout(new LayoutBorderHorizontal());
+
+		EntityDataPlayer entity = workspace.getPlayerEntity();
+		String speciesId = entity.getSpecies().getId();
+		SpeciesRender speciesRender = SpeciesRenderRegistry.getInstance().get(speciesId);
+
+		Map<Side, Component> containers = Maps.toMap(
+			Arrays.asList(Side.values()),
+			side -> new Group(name + "." + side.ccName, new LayoutVertical(15))
+		);
+
+		for (int i = 0; i < entity.getEquipmentCount(); ++i) {
+
+			EquipmentSlot slot = entity.getSpecies().getEquipmentSlots().get(i);
+
+			SlotComponent display = new SlotComponent(name + "." + slot.getName(), entity.getEquipmentSlot(i), 0)
+				.setBackground(speciesRender.getEquipmentSlotBackground(slot))
+				.setScale(2);
+
+			InteractiveSlotComponent interactiveDisplay = new InteractiveSlotComponent(
+				display,
+				workspace
+			);
+
+			containers.get(speciesRender.getEquipmentSlotSide(slot)).addChild(interactiveDisplay);
+
+		}
+
+		containers.forEach((side, comp) -> {
+			addChild(
+				new Group(name + "." + side.ccName + ".Aligner", new LayoutAlign(0, 1, 0), comp)
+					.setLayoutHint(side.lbhHint)
+			);
+		});
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/InventoryWindow.java

@@ -0,0 +1,154 @@
+/*
+ * 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.world.hud;
+
+import com.google.common.eventbus.Subscribe;
+
+import glm.vec._2.Vec2;
+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.Typeface;
+import ru.windcorp.progressia.client.graphics.gui.Button;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.gui.DragManager;
+import ru.windcorp.progressia.client.graphics.gui.Group;
+import ru.windcorp.progressia.client.graphics.gui.Label;
+import ru.windcorp.progressia.client.graphics.gui.Panel;
+import ru.windcorp.progressia.client.graphics.gui.event.DragEvent;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutBorderHorizontal;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutFill;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutVertical;
+import ru.windcorp.progressia.client.localization.MutableString;
+import ru.windcorp.progressia.client.localization.MutableStringConcat;
+import ru.windcorp.progressia.client.localization.MutableStringLocalized;
+import ru.windcorp.progressia.client.world.item.inventory.InventoryComponent;
+
+public class InventoryWindow extends Panel {
+
+	private static final String CLOSE_CHAR = "\u2715";
+	private static final String HANDLE_CHAR = "\u2800";
+	private static final Vec4 CLOSE_BUTTON_IDLE = Colors.toVector(0xFFBC1515);
+	private static final Vec4 CLOSE_BUTTON_HOVER = Colors.toVector(0xFFFA6464);
+	private static final Vec4 CLOSE_BUTTON_PRESSED = Colors.BLACK;
+
+	private final InventoryComponent content;
+	private final HUDWorkspace workspace;
+
+	private final Vec2 relativePosition = new Vec2(Float.NaN);
+
+	public InventoryWindow(String name, InventoryComponent component, HUDWorkspace workspace) {
+		super(name, new LayoutVertical(15, 15));
+		this.content = component;
+		this.workspace = workspace;
+
+		Group titleBar = new Group(getName() + ".TitleBar", new LayoutBorderHorizontal());
+		titleBar.addChild(createLabel(component).setLayoutHint(LayoutBorderHorizontal.CENTER));
+		titleBar.addChild(createCloseButton(component).setLayoutHint(LayoutBorderHorizontal.RIGHT));
+
+		new DragManager().install(titleBar);
+		titleBar.addListener(new Object() {
+			@Subscribe
+			public void onWindowDragged(DragEvent e) {
+				Vec2 change = new Vec2((float) e.getCurrentChangeX(), (float) e.getCurrentChangeY());
+				change.div(getParent().getWidth(), getParent().getHeight());
+				relativePosition.add(change);
+				requestReassembly();
+			}
+		});
+
+		addChild(titleBar);
+
+		addChild(component);
+	}
+
+	private Label createLabel(InventoryComponent component) {
+		String translationKey = "Inventory." + component.getInventory().getId() + ".Title";
+		MutableString titleText = new MutableStringConcat(
+			HANDLE_CHAR + " ",
+			new MutableStringLocalized(translationKey)
+		);
+		Font titleFont = new Font().deriveBold().withColor(Colors.BLACK).withAlign(Typeface.ALIGN_LEFT);
+
+		return new Label(getName() + ".Title", titleFont, titleText);
+	}
+
+	private WindowedHUD getManager() {
+		Component parent = getParent();
+		if (parent instanceof WindowedHUD) {
+			return (WindowedHUD) parent;
+		}
+		return null;
+	}
+
+	/**
+	 * @return the relativePosition
+	 */
+	public Vec2 getRelativePosition() {
+		return relativePosition;
+	}
+
+	private Component createCloseButton(InventoryComponent component) {
+
+		Button button = new Button(getName() + ".CloseButton", CLOSE_CHAR) {
+
+			@Override
+			protected void assembleSelf(RenderTarget target) {
+
+				Vec4 color = CLOSE_BUTTON_IDLE;
+				if (isPressed()) {
+					color = CLOSE_BUTTON_PRESSED;
+				} else if (isHovered()) {
+					color = CLOSE_BUTTON_HOVER;
+				}
+
+				if (hasLabel()) {
+					getLabel().setFont(getLabel().getFont().withColor(color));
+				}
+
+			}
+
+		};
+
+		button.addAction(b -> {
+
+			content.getInventory().close(workspace.getPlayerEntity());
+
+			WindowedHUD manager = getManager();
+			if (manager == null) {
+				return;
+			}
+
+			manager.closeWindow(this);
+
+		});
+
+		button.setLayout(new LayoutFill());
+
+		int height = button.getLabel().getFont().getHeight(button.getLabel().getCurrentText());
+		button.setPreferredSize(height, height);
+
+		return button;
+	}
+
+	public InventoryComponent getContent() {
+		return content;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/ItemAmountTypeface.java

@@ -0,0 +1,71 @@
+/*
+ * 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.world.hud;
+
+import java.io.IOException;
+
+import ru.windcorp.progressia.client.graphics.flat.FlatRenderProgram;
+import ru.windcorp.progressia.client.graphics.font.SpriteTypeface;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderProgram;
+import ru.windcorp.progressia.client.graphics.texture.ComplexTexture;
+import ru.windcorp.progressia.client.graphics.texture.Texture;
+import ru.windcorp.progressia.client.graphics.texture.TextureLoader;
+import ru.windcorp.progressia.client.graphics.texture.TexturePrimitive;
+import ru.windcorp.progressia.client.graphics.texture.TextureSettings;
+import ru.windcorp.progressia.common.resource.ResourceManager;
+
+public class ItemAmountTypeface extends SpriteTypeface {
+	
+	public static final int HEIGHT = 5;
+	public static final int WIDTH = 3;
+
+	private final Texture[] textures = new Texture[10];
+
+	public ItemAmountTypeface() throws IOException {
+		super("ItemAmount", HEIGHT, 1);
+		
+		ComplexTexture atlas = new ComplexTexture(new TexturePrimitive(
+			TextureLoader.loadPixels(
+				ResourceManager.getTextureResource("gui/ItemAmountTypeface"),
+				new TextureSettings(false)
+			).getData()
+		), 30, 5);
+		
+		for (int i = 0; i <= 9; ++i) {
+			textures[i] = atlas.get(i * WIDTH, 0, WIDTH, HEIGHT);
+		}
+	}
+
+	@Override
+	public Texture getTexture(char c) {
+		if (!supports(c))
+			return textures[0];
+		return textures[c - '0'];
+	}
+
+	@Override
+	public ShapeRenderProgram getProgram() {
+		return FlatRenderProgram.getDefault();
+	}
+
+	@Override
+	public boolean supports(char c) {
+		return c >= '0' && c <= '9';
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/LayerHUD.java

@@ -0,0 +1,153 @@
+/*
+ * 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.world.hud;
+
+import com.google.common.eventbus.Subscribe;
+
+import ru.windcorp.progressia.client.events.NewLocalEntityEvent;
+import ru.windcorp.progressia.client.graphics.GUI;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.gui.Components;
+import ru.windcorp.progressia.client.graphics.gui.GUILayer;
+import ru.windcorp.progressia.client.graphics.gui.Group;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutFill;
+import ru.windcorp.progressia.client.graphics.input.InputEvent;
+import ru.windcorp.progressia.client.graphics.input.KeyMatcher;
+import ru.windcorp.progressia.client.graphics.input.bus.InputBus;
+import ru.windcorp.progressia.test.controls.TestPlayerControls;
+
+public class LayerHUD extends GUILayer {
+
+	private final HUDManager manager;
+	private WindowedHUD windowManager = null;
+
+	private boolean showInventory = false;
+	private boolean isHidden = false;
+
+	public LayerHUD(HUDManager manager) {
+		super("LayerHUD", new LayoutFill(15));
+		this.manager = manager;
+
+		setCursorPolicy(CursorPolicy.INDIFFERENT);
+
+		manager.getClient().subscribe(this);
+		
+		getRoot().addKeyListener(new KeyMatcher("Escape"), e -> {
+			setInventoryShown(!showInventory);
+			e.consume();
+		}, InputBus.Option.IGNORE_FOCUS);
+		
+		getRoot().addKeyListener(new KeyMatcher("E"), e -> {
+			setInventoryShown(!showInventory);
+			e.consume();
+		}, InputBus.Option.IGNORE_FOCUS);
+		
+		getRoot().addKeyListener(new KeyMatcher("Left Control"), e -> {
+			TestPlayerControls.getInstance().getInventoryControls().switchHandsWithCtrl(e);
+			e.consume();
+		}, InputBus.Option.IGNORE_ACTION, InputBus.Option.IGNORE_FOCUS);
+		
+		getRoot().addKeyListener(new KeyMatcher("Right Control"), e -> {
+			TestPlayerControls.getInstance().getInventoryControls().switchHandsWithCtrl(e);
+			e.consume();
+		}, InputBus.Option.IGNORE_ACTION, InputBus.Option.IGNORE_FOCUS);
+		
+	}
+
+	@Subscribe
+	private void onEntityChanged(NewLocalEntityEvent e) {
+		while (!getRoot().getChildren().isEmpty()) {
+			getRoot().removeChild(getRoot().getChild(0));
+		}
+
+		if (e.getNewEntity() == null) {
+			getRoot().requestReassembly();
+			return;
+		}
+
+		getRoot().addChild(new PermanentHUD(getName() + ".Permanent", manager));
+
+		Component inventoryGroup = new Group(getName() + ".InventoryGroup", new LayoutFill());
+		
+		inventoryGroup.addChild(new InventoryHUD(getName() + ".Equipment", manager));
+		
+		windowManager = new WindowedHUD(getName() + ".Windows");
+		inventoryGroup.addChild(windowManager);
+
+		inventoryGroup.addChild(new CursorHUD(getName() + ".Cursor", manager.getPlayerEntity()));
+		
+		getRoot().addChild(Components.hide(inventoryGroup, () -> !showInventory));
+
+		getRoot().requestReassembly();
+	}
+	
+	public WindowedHUD getWindowManager() {
+		return windowManager;
+	}
+
+	public boolean isInventoryShown() {
+		return showInventory;
+	}
+
+	public void setInventoryShown(boolean showInventory) {
+		this.showInventory = showInventory;
+		updateCursorPolicy();
+	}
+
+	public boolean isHidden() {
+		return isHidden;
+	}
+
+	public void setHidden(boolean isHidden) {
+		this.isHidden = isHidden;
+		updateCursorPolicy();
+	}
+
+	private void updateCursorPolicy() {
+		if (showInventory && !isHidden) {
+			setCursorPolicy(CursorPolicy.REQUIRE);
+		} else {
+			setCursorPolicy(CursorPolicy.INDIFFERENT);
+		}
+
+		GUI.updateLayer(this);
+	}
+
+	@Override
+	public void handleInput(InputEvent event) {
+		if (isHidden) {
+			return;
+		}
+		
+		super.handleInput(event);
+		
+		if (getCursorPolicy() == CursorPolicy.REQUIRE) {
+			event.consume();
+		}
+	}
+
+	@Override
+	protected void doRender() {
+		if (isHidden) {
+			return;
+		}
+
+		super.doRender();
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/PermanentHUD.java

@@ -0,0 +1,38 @@
+/*
+ * 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.world.hud;
+
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutBorderVertical;
+import ru.windcorp.progressia.common.world.entity.EntityDataPlayer;
+
+public class PermanentHUD extends Component {
+
+	public PermanentHUD(String name, HUDManager manager) {
+		super(name);
+		setLayout(new LayoutBorderVertical());
+
+		EntityDataPlayer entity = manager.getPlayerEntity();
+		if (entity == null) {
+			throw new IllegalStateException("Player " + manager.getPlayer() + " does not have an associated entity");
+		}
+		
+		addChild(new HandsHUD(name + ".Hands", manager).setLayoutHint(LayoutBorderVertical.UP));
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/SlotComponent.java

@@ -0,0 +1,217 @@
+/*
+ * 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.world.hud;
+
+import java.util.function.BooleanSupplier;
+import glm.mat._4.Mat4;
+import ru.windcorp.progressia.client.graphics.Colors;
+import ru.windcorp.progressia.client.graphics.backend.InputTracker;
+import ru.windcorp.progressia.client.graphics.flat.FlatRenderProgram;
+import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
+import ru.windcorp.progressia.client.graphics.font.Font;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.gui.DynamicLabel;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
+import ru.windcorp.progressia.client.graphics.model.Shapes.PgmBuilder;
+import ru.windcorp.progressia.client.graphics.texture.Texture;
+import ru.windcorp.progressia.client.world.item.ItemRenderRegistry;
+import ru.windcorp.progressia.client.world.item.ItemRenderable;
+import ru.windcorp.progressia.common.world.item.ItemData;
+import ru.windcorp.progressia.common.world.item.ItemDataContainer;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainer;
+import ru.windcorp.progressia.common.world.item.inventory.ItemSlot;
+
+public class SlotComponent extends Component {
+
+	static final float TEXTURE_SIZE = 24;
+	
+	private static boolean drawVirtualSlots;
+	static {
+		String key = SlotComponent.class.getName() + ".drawVirtualSlots";
+		drawVirtualSlots = Boolean.parseBoolean(System.getProperty(key, "true"));
+	}
+
+	private static Renderable containerOpenDecoration = null;
+	private static Renderable containerOpenableDecoration = null;
+
+	private final ItemSlot slot;
+
+	private float scale = 2;
+
+	private ItemRenderable itemRenderer = null;
+
+	private int amountDisplayInt = 0;
+	private String amountDisplayString = "";
+
+	private Renderable background = null;
+	private BooleanSupplier backgroundCondition = null;
+
+	public SlotComponent(String name, ItemContainer container, int index) {
+		super(name);
+		this.slot = new ItemSlot(container, index);
+
+		setScale(2);
+
+		Font sizeFont = new Font(HUDTextures.getItemAmountTypeface()).deriveOutlined().withScale(2);
+		addChild(new DynamicLabel(getName() + ".Size", sizeFont, () -> amountDisplayString, getPreferredSize().x));
+
+		setLayout(new LayoutAlign(0, 0, 0));
+
+		if (containerOpenDecoration == null) {
+			containerOpenDecoration = new PgmBuilder(
+				FlatRenderProgram.getDefault(),
+				HUDTextures.getHUDTexture("DecorationContainerOpen")
+			).setSize(TEXTURE_SIZE + 2).setOrigin(-1, -1, 0).create();
+		}
+		
+		if (containerOpenableDecoration == null) {
+			containerOpenableDecoration = new PgmBuilder(
+				FlatRenderProgram.getDefault(),
+				HUDTextures.getHUDTexture("DecorationContainerOpenable")
+			).setSize(TEXTURE_SIZE + 2).setOrigin(-1, -1, 0).create();
+		}
+	}
+	
+	/**
+	 * @return the container
+	 */
+	public ItemContainer getSlotContainer() {
+		return slot.getContainer();
+	}
+	
+	/**
+	 * @return the index
+	 */
+	public int getSlotIndex() {
+		return slot.getIndex();
+	}
+
+	public ItemSlot getSlot() {
+		return slot;
+	}
+
+	public SlotComponent setScale(float scale) {
+		this.scale = scale;
+
+		int side = (int) (TEXTURE_SIZE * scale);
+		setPreferredSize(side, side);
+		invalidate();
+
+		return this;
+	}
+
+	public SlotComponent setBackground(Texture texture, BooleanSupplier when) {
+		background = new PgmBuilder(FlatRenderProgram.getDefault(), texture).setSize(TEXTURE_SIZE).create();
+		setBackgroundDisplayCondition(when);
+		return this;
+	}
+
+	public SlotComponent setBackground(Texture texture) {
+		return setBackground(texture, null);
+	}
+
+	public SlotComponent setBackgroundDisplayCondition(BooleanSupplier backgroundCondition) {
+		this.backgroundCondition = backgroundCondition;
+		return this;
+	}
+
+	@Override
+	protected void assembleSelf(RenderTarget target) {
+		super.assembleSelf(target);
+		assembleItem(target);
+	}
+
+	private void updateItemRenderer() {
+		ItemData contents;
+		contents = slot.getItem();
+
+		if (contents == null) {
+			itemRenderer = null;
+			amountDisplayInt = 0;
+			amountDisplayString = "";
+		} else {
+			if (itemRenderer == null || itemRenderer.getData() != contents) {
+				itemRenderer = ItemRenderRegistry.getInstance().get(contents.getId()).createRenderable(contents);
+			}
+
+			int newAmount = slot.getCount();
+			if (newAmount != amountDisplayInt) {
+				amountDisplayInt = newAmount;
+				amountDisplayString = newAmount == 1 ? "" : Integer.toString(newAmount);
+			}
+		}
+	}
+
+	private void assembleItem(RenderTarget target) {
+		target.pushTransform(new Mat4().translate(getX(), getY(), 0).scale(scale, scale, 1));
+		target.addCustomRenderer(renderer -> {
+
+			updateItemRenderer();
+			
+			if (drawVirtualSlots && getSlot() == null) {
+				renderer.pushColorMultiplier().set(Colors.DEBUG_GREEN);
+				containerOpenDecoration.render(renderer);
+				renderer.popColorMultiplier();
+				return;
+			}
+
+			if (itemRenderer != null) {
+				itemRenderer.render(renderer);
+				renderDecorations(renderer);
+			} else if (background != null) {
+				if (backgroundCondition == null || backgroundCondition.getAsBoolean()) {
+					background.render(renderer);
+				}
+			}
+
+		});
+		target.popTransform();
+	}
+
+	private void renderDecorations(ShapeRenderHelper renderer) {
+		ItemData contents = getSlot().getItem();
+
+		if (contents instanceof ItemDataContainer) {
+			ItemDataContainer asContainer = (ItemDataContainer) contents;
+			
+			if (asContainer.isOpen()) {
+				renderer.pushColorMultiplier().mul(Colors.BLUE);
+				containerOpenDecoration.render(renderer);
+				renderer.popColorMultiplier();
+			} else {
+				
+				double dx = InputTracker.getCursorX() - (getX() + getWidth() / 2);
+				double dy = InputTracker.getCursorY() - (getY() + getHeight() / 2);
+				double distanceToCursorSquared = dx*dx + dy*dy;
+				final double maxDistanceSquared = (scale * TEXTURE_SIZE * 4) * (scale * TEXTURE_SIZE * 4);
+				
+				float opacity = (float) (1 - distanceToCursorSquared / maxDistanceSquared);
+				
+				if (opacity > 0) {
+					renderer.pushColorMultiplier().mul(Colors.BLUE.x, Colors.BLUE.y, Colors.BLUE.z, opacity);
+					containerOpenableDecoration.render(renderer);
+					renderer.popColorMultiplier();
+				}
+				
+			}
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/WindowedHUD.java

@@ -0,0 +1,48 @@
+/*
+ * 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.world.hud;
+
+import ru.windcorp.progressia.client.graphics.gui.Component;
+
+public class WindowedHUD extends Component {
+
+	public WindowedHUD(String name) {
+		super(name);
+		setLayout(new WindowedLayout());
+	}
+
+	public void addWindow(InventoryWindow window) {
+		addChild(window);
+		window.setSize(window.getPreferredSize());
+
+		centerWindow(window);
+	}
+	
+	public void closeWindow(InventoryWindow window) {
+		removeChild(window);
+		requestReassembly();
+	}
+
+	private void centerWindow(InventoryWindow window) {
+		window.setPosition(
+			(getWidth() - window.getWidth()) / 2,
+			(getHeight() - window.getHeight()) / 2
+		);
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/hud/WindowedLayout.java

@@ -0,0 +1,64 @@
+/*
+ * 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.world.hud;
+
+import glm.Glm;
+import glm.vec._2.Vec2;
+import glm.vec._2.i.Vec2i;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.gui.Layout;
+
+public class WindowedLayout implements Layout {
+
+	@Override
+	public void layout(Component c) {
+		for (Component component : c.getChildren()) {
+			InventoryWindow window = (InventoryWindow) component;
+			
+			Vec2i size = new Vec2i(c.getWidth(), c.getHeight());
+			Glm.min(window.getPreferredSize(), size, size);
+			window.setSize(size);
+			
+			Vec2 relPos = window.getRelativePosition();
+			
+			if (Float.isNaN(relPos.x) || Float.isNaN(relPos.y)) {
+				relPos.x = 0.5f;
+				relPos.y = 2 / 3.0f;
+			} else {			
+				float minPosX = 0;
+				float minPosY = window.getHeight() / (float) c.getHeight();
+				float maxPosX = 1;
+				float maxPosY = 1;
+				
+				relPos.x = Glm.clamp(relPos.x, minPosX, maxPosX);
+				relPos.y = Glm.clamp(relPos.y, minPosY, maxPosY);
+			}
+			
+			window.setPosition(
+				(int) (relPos.x * c.getWidth() - window.getWidth() / 2.0f),
+				(int) (relPos.y * c.getHeight() - window.getHeight())
+			);
+		}
+	}
+
+	@Override
+	public Vec2i calculatePreferredSize(Component c) {
+		throw new UnsupportedOperationException();
+	}
+
+}

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

@@ -0,0 +1,51 @@
+/*
+ * 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 ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
+
+public abstract class UpdatingRenderable implements Renderable {
+	
+	private long stateComputedForFrame = -1;
+
+	/**
+	 * Updates the state of this model. This method is invoked exactly once per
+	 * renderable per frame before this model is queried for the first time.
+	 */
+	protected void update() {
+		// Do nothing
+	}
+	
+	protected 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);
+
+}

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

@@ -0,0 +1,39 @@
+/*
+ * 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.entity;
+
+import ru.windcorp.progressia.common.world.entity.EntityData;
+import ru.windcorp.progressia.common.world.entity.EntityDataPlayer;
+
+public class EntityRenderPlayer extends EntityRender {
+
+	public EntityRenderPlayer(String id) {
+		super(id);
+	}
+
+	@Override
+	public EntityRenderable createRenderable(EntityData entity) {
+		EntityDataPlayer playerEntity = (EntityDataPlayer) entity;
+		
+		String speciesId = playerEntity.getSpecies().getId();
+		SpeciesRender speciesRender = SpeciesRenderRegistry.getInstance().get(speciesId);
+		
+		return speciesRender.createRenderable(playerEntity);
+	}
+
+}

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

@@ -42,7 +42,7 @@ public class EntityRenderRegistry extends NamespacedInstanceRegistry<EntityRende
 					ResourceManager.getTextureResource(
 						"entities/" + name
 					),
-					new TextureSettings(false, false)
+					new TextureSettings(false)
 				).getData()
 			);
 		} catch (IOException e) {

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

@@ -19,45 +19,18 @@
 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.world.UpdatingRenderable;
-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.EntityGeneric;
 
-public abstract class EntityRenderable implements Renderable, EntityGeneric {
+public abstract class EntityRenderable extends UpdatingRenderable implements 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;
 	}

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

@@ -0,0 +1,52 @@
+/*
+ * 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.entity;
+
+import ru.windcorp.progressia.client.graphics.texture.Texture;
+import ru.windcorp.progressia.client.graphics.world.hud.InventoryHUD;
+import ru.windcorp.progressia.client.graphics.world.hud.HUDTextures;
+import ru.windcorp.progressia.client.graphics.world.hud.HandsHUD;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
+import ru.windcorp.progressia.common.world.entity.EntityDataPlayer;
+import ru.windcorp.progressia.common.world.entity.SpeciesData.EquipmentSlot;
+import ru.windcorp.progressia.common.world.entity.SpeciesData.Hand;
+
+public abstract class SpeciesRender extends Namespaced {
+
+	public SpeciesRender(String id) {
+		super(id);
+	}
+
+	public abstract EntityRenderable createRenderable(EntityDataPlayer entity);
+	
+	public abstract HandsHUD.Side getHandSide(Hand hand);
+	public abstract InventoryHUD.Side getEquipmentSlotSide(EquipmentSlot equipmentSlot);
+	
+	public Texture getTexture(String name) {
+		return HUDTextures.getHUDTexture(getNamespace() + "_" + getName() + "/" + name);
+	}
+	
+	public Texture getHandBackground(Hand hand) {
+		return getTexture("Hand" + hand.getName());
+	}
+	
+	public Texture getEquipmentSlotBackground(EquipmentSlot slot) {
+		return getTexture("EquipmentSlot" + slot.getName());
+	}
+
+}

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

@@ -0,0 +1,35 @@
+/*
+ * 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.entity;
+
+import ru.windcorp.progressia.common.util.namespaces.NamespacedInstanceRegistry;
+import ru.windcorp.progressia.common.world.entity.EntityDataPlayer;
+
+public class SpeciesRenderRegistry extends NamespacedInstanceRegistry<SpeciesRender> {
+	
+	private static final SpeciesRenderRegistry INSTANCE = new SpeciesRenderRegistry();
+	
+	public static SpeciesRenderRegistry getInstance() {
+		return INSTANCE;
+	}
+	
+	public SpeciesRender get(EntityDataPlayer player) {
+		return get(player.getSpecies().getId());
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/item/ItemRender.java

@@ -0,0 +1,31 @@
+/*
+ * 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.item;
+
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
+import ru.windcorp.progressia.common.world.item.ItemData;
+
+public abstract class ItemRender extends Namespaced {
+
+	public ItemRender(String id) {
+		super(id);
+	}
+	
+	public abstract ItemRenderable createRenderable(ItemData data);
+
+}

src/main/java/ru/windcorp/progressia/client/world/item/ItemRenderRegistry.java

@@ -0,0 +1,51 @@
+/*
+ * 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.item;
+
+import ru.windcorp.progressia.client.graphics.texture.Atlases;
+import ru.windcorp.progressia.client.graphics.texture.SimpleTexture;
+import ru.windcorp.progressia.client.graphics.texture.Texture;
+import ru.windcorp.progressia.client.graphics.texture.Atlases.AtlasGroup;
+import ru.windcorp.progressia.common.resource.ResourceManager;
+import ru.windcorp.progressia.common.util.namespaces.NamespacedInstanceRegistry;
+
+public class ItemRenderRegistry extends NamespacedInstanceRegistry<ItemRender> {
+
+	private static final ItemRenderRegistry INSTANCE = new ItemRenderRegistry();
+
+	private static final AtlasGroup ITEMS_ATLAS_GROUP = new AtlasGroup("Items", 1 << 12);
+
+	public static ItemRenderRegistry getInstance() {
+		return INSTANCE;
+	}
+
+	public static Texture getItemTexture(String name) {
+		return new SimpleTexture(
+			Atlases.getSprite(
+				ResourceManager.getTextureResource("items/" + name),
+				ITEMS_ATLAS_GROUP
+			)
+		);
+	}
+
+	public static AtlasGroup getItemsAtlasGroup() {
+		return ITEMS_ATLAS_GROUP;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/item/ItemRenderSimple.java

@@ -0,0 +1,69 @@
+/*
+ * 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.item;
+
+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.flat.FlatRenderProgram;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.Shape;
+import ru.windcorp.progressia.client.graphics.model.ShapeParts;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
+import ru.windcorp.progressia.client.graphics.texture.Texture;
+import ru.windcorp.progressia.common.world.item.ItemData;
+
+public class ItemRenderSimple extends ItemRender {
+
+	private Texture texture;
+	private Renderable renderable;
+
+	public ItemRenderSimple(String id, Texture texture) {
+		super(id);
+		this.texture = texture;
+		
+		this.renderable = new Shape(
+			Usage.STATIC, 
+			FlatRenderProgram.getDefault(),
+			ShapeParts.createRectangle(
+				FlatRenderProgram.getDefault(),
+				texture,
+				Colors.WHITE,
+				new Vec3(0, 0, 0),
+				new Vec3(24, 0, 0),
+				new Vec3(0, 24, 0),
+				false
+			)
+		);
+	}
+	
+	public Texture getTexture() {
+		return texture;
+	}
+
+	@Override
+	public ItemRenderable createRenderable(ItemData data) {
+		return new ItemRenderable(data) {
+			@Override
+			protected void doRender(ShapeRenderHelper renderer) {
+				renderable.render(renderer);
+			}
+		};
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/item/ItemRenderable.java

@@ -0,0 +1,35 @@
+/*
+ * 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.item;
+
+import ru.windcorp.progressia.client.world.UpdatingRenderable;
+import ru.windcorp.progressia.common.world.item.ItemData;
+
+public abstract class ItemRenderable extends UpdatingRenderable {
+
+	private final ItemData data;
+
+	public ItemRenderable(ItemData data) {
+		this.data = data;
+	}
+	
+	public ItemData getData() {
+		return data;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/item/inventory/ContainerComponent.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.client.world.item.inventory;
+
+import java.util.Collection;
+
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.world.hud.InteractiveSlotComponent;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainer;
+
+public abstract class ContainerComponent extends Component {
+
+	public ContainerComponent(String name) {
+		super(name);
+	}
+
+	public abstract ItemContainer getContainer();
+	
+	public abstract Collection<InteractiveSlotComponent> getSlots();
+
+}

src/main/java/ru/windcorp/progressia/client/world/item/inventory/ContainerComponentSimple.java

@@ -0,0 +1,137 @@
+/*
+ * 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.item.inventory;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import com.google.common.eventbus.Subscribe;
+
+import glm.vec._2.i.Vec2i;
+import ru.windcorp.progressia.client.graphics.Colors;
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.client.graphics.gui.Group;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutBorderHorizontal;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutBorderVertical;
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutGrid;
+import ru.windcorp.progressia.client.graphics.world.hud.Bar;
+import ru.windcorp.progressia.client.graphics.world.hud.HUDWorkspace;
+import ru.windcorp.progressia.client.graphics.world.hud.InteractiveSlotComponent;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainer;
+import ru.windcorp.progressia.common.world.item.inventory.event.ItemSlotChangedEvent;
+
+public class ContainerComponentSimple extends ContainerComponent {
+
+	private final Group slots = new Group("Inventory.Slots", new LayoutGrid(0, 15));
+	private final List<InteractiveSlotComponent> slotCollection = new ArrayList<>();
+	
+	private final ItemContainer container;
+	private final HUDWorkspace workspace;
+	
+	private int tmp__getSlotsPerRow() {
+		return 6;
+	}
+
+	public ContainerComponentSimple(ItemContainer container, HUDWorkspace workspace) {
+		super("Inventory");
+		this.container = container;
+		this.workspace = workspace;
+		
+		if (container.getInventory() != null) {
+			container.getInventory().subscribe(this);
+		}
+
+		setLayout(new LayoutBorderHorizontal(15));
+
+		Bar massBar = new Bar(
+			"MassBar",
+			true,
+			Colors.toVector(0xFF44AAAA),
+			container::getMass,
+			container::getMassLimit
+		);
+		Bar volumeBar = new Bar(
+			"VolumeBar",
+			false,
+			Colors.toVector(0xFFAA4444),
+			container::getVolume,
+			container::getVolumeLimit
+		);
+
+		Component slotsAndVolumeBar = new Group(
+			"SlotsAndVolumeBar",
+			new LayoutBorderVertical(15),
+			slots.setLayoutHint(LayoutBorderVertical.CENTER),
+			volumeBar.setLayoutHint(LayoutBorderVertical.UP)
+		);
+
+		addChild(slotsAndVolumeBar.setLayoutHint(LayoutBorderHorizontal.CENTER));
+		addChild(massBar.setLayoutHint(LayoutBorderHorizontal.LEFT));
+		
+		onSlotChanged(null);
+	}
+
+	private void addSlot(int index) {
+		final int maxX = tmp__getSlotsPerRow();
+
+		InteractiveSlotComponent component = new InteractiveSlotComponent("Inventory.Slot." + index, container, index, workspace);
+
+		Vec2i pos = new Vec2i(index % maxX, index / maxX);
+		slots.addChild(component.setLayoutHint(pos));
+		slotCollection.add(component);
+	}
+	
+	private void removeSlot(int index) {
+		slots.removeChild(slotCollection.remove(index));
+	}
+
+	@Override
+	public ItemContainer getContainer() {
+		return container;
+	}
+
+	@Override
+	public Collection<InteractiveSlotComponent> getSlots() {
+		return slotCollection;
+	}
+	
+	@Subscribe
+	private void onSlotChanged(ItemSlotChangedEvent e) {
+		if (e != null && e.getContainer() != container) {
+			return;
+		}
+		
+		int wantSlots = container.getLastFilledSlot();
+		int slotsPerRow = tmp__getSlotsPerRow();
+		
+		wantSlots = (wantSlots / slotsPerRow + 2) * slotsPerRow;
+		if (wantSlots < slotsPerRow) {
+			wantSlots = slotsPerRow;
+		}
+		
+		while (wantSlots > slotCollection.size()) {
+			addSlot(slotCollection.size());
+		}
+		
+		while (wantSlots < slotCollection.size()) {
+			removeSlot(slotCollection.size() - 1);
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/item/inventory/InventoryComponent.java

@@ -0,0 +1,35 @@
+/*
+ * 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.item.inventory;
+
+import java.util.Collection;
+
+import ru.windcorp.progressia.client.graphics.gui.Component;
+import ru.windcorp.progressia.common.world.item.inventory.Inventory;
+
+public abstract class InventoryComponent extends Component {
+
+	public InventoryComponent(String name) {
+		super(name);
+	}
+	
+	public abstract Inventory getInventory();
+	
+	public abstract Collection<? extends ContainerComponent> getContainers();
+
+}

src/main/java/ru/windcorp/progressia/client/world/item/inventory/InventoryComponentSimple.java

@@ -0,0 +1,55 @@
+/*
+ * 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.item.inventory;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import ru.windcorp.progressia.client.graphics.gui.layout.LayoutFill;
+import ru.windcorp.progressia.client.graphics.world.hud.HUDWorkspace;
+import ru.windcorp.progressia.common.world.item.inventory.Inventory;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainer;
+
+public class InventoryComponentSimple extends InventoryComponent {
+	
+	private final Inventory inventory;
+	private final Collection<ContainerComponentSimple> containers = new ArrayList<>();
+
+	public InventoryComponentSimple(String name, Inventory inventory, HUDWorkspace workspace) {
+		super(name);
+		setLayout(new LayoutFill());
+		this.inventory = inventory;
+		
+		for (ItemContainer container : inventory.getContainers()) {
+			ContainerComponentSimple component = new ContainerComponentSimple(container, workspace);
+			containers.add(component);
+			addChild(component);
+		}
+	}
+
+	@Override
+	public Inventory getInventory() {
+		return inventory;
+	}
+
+	@Override
+	public Collection<? extends ContainerComponent> getContainers() {
+		return containers;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/item/inventory/InventoryRender.java

@@ -0,0 +1,32 @@
+/*
+ * 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.item.inventory;
+
+import ru.windcorp.progressia.client.graphics.world.hud.HUDWorkspace;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
+import ru.windcorp.progressia.common.world.item.inventory.Inventory;
+
+public abstract class InventoryRender extends Namespaced {
+
+	public InventoryRender(String id) {
+		super(id);
+	}
+	
+	public abstract InventoryComponent createComponent(Inventory inventory, HUDWorkspace workspace);
+
+}

src/main/java/ru/windcorp/progressia/client/world/item/inventory/InventoryRenderRegistry.java

@@ -0,0 +1,30 @@
+/*
+ * 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.item.inventory;
+
+import ru.windcorp.progressia.common.util.namespaces.NamespacedInstanceRegistry;
+
+public class InventoryRenderRegistry extends NamespacedInstanceRegistry<InventoryRender> {
+	
+	private static final InventoryRenderRegistry INSTANCE = new InventoryRenderRegistry();
+	
+	public static InventoryRenderRegistry getInstance() {
+		return INSTANCE;
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/Units.java

@@ -65,6 +65,8 @@ public class Units {
 
 	// Volume
 	public static final float CUBIC_CENTIMETERS = CENTIMETERS * CENTIMETERS * CENTIMETERS;
+	@RegisteredUnit("L")
+	public static final float LITERS = (10 * CENTIMETERS) * (10 * CENTIMETERS) * (10 * CENTIMETERS);
 	public static final float CUBIC_METERS = METERS * METERS * METERS;
 	public static final float CUBIC_MILLIMETERS = MILLIMETERS * MILLIMETERS * MILLIMETERS;
 	public static final float CUBIC_KILOMETERS = KILOMETERS * KILOMETERS * KILOMETERS;

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

@@ -0,0 +1,87 @@
+/*
+ * 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.state;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+public class BooleanStateField extends StateField {
+
+	public BooleanStateField(
+		String id,
+		boolean isLocal,
+		int index
+	) {
+		super(id, isLocal, index);
+	}
+
+	public boolean get(StatefulObject object) {
+		return object.getStorage().getBoolean(getIndex());
+	}
+
+	public void setNow(StatefulObject object, boolean value) {
+		object.getStorage().setBoolean(getIndex(), value);
+	}
+
+	public void set(StateChanger changer, boolean value) {
+		changer.setBoolean(this, value);
+	}
+
+	@Override
+	public void read(
+		StatefulObject object,
+		DataInput input,
+		IOContext context
+	)
+		throws IOException {
+		object.getStorage().setBoolean(getIndex(), input.readBoolean());
+	}
+
+	@Override
+	public void write(
+		StatefulObject object,
+		DataOutput output,
+		IOContext context
+	)
+		throws IOException {
+		output.writeBoolean(object.getStorage().getBoolean(getIndex()));
+	}
+
+	@Override
+	public void copy(StatefulObject from, StatefulObject to) {
+		setNow(to, get(from));
+	}
+
+	@Override
+	public int computeHashCode(StatefulObject object) {
+		return Boolean.hashCode(get(object));
+	}
+
+	@Override
+	public boolean areEqual(StatefulObject a, StatefulObject b) {
+		return get(a) == get(b);
+	}
+	
+	@Override
+	public void setDefault(StateStorage storage) {
+		storage.setBoolean(getIndex(), false);
+	}
+
+}

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

@@ -22,10 +22,13 @@ import gnu.trove.map.TIntIntMap;
 import gnu.trove.map.TIntObjectMap;
 import gnu.trove.map.hash.TIntIntHashMap;
 import gnu.trove.map.hash.TIntObjectHashMap;
+import gnu.trove.set.TIntSet;
+import gnu.trove.set.hash.TIntHashSet;
 
 public class HashMapStateStorage extends StateStorage {
 
 	private final TIntIntMap ints = new TIntIntHashMap();
+	private final TIntSet booleans = new TIntHashSet();
 	private final TIntObjectMap<Object> objects = new TIntObjectHashMap<>();
 
 	@Override
@@ -38,6 +41,20 @@ public class HashMapStateStorage extends StateStorage {
 		ints.put(index, value);
 	}
 	
+	@Override
+	public boolean getBoolean(int index) {
+		return booleans.contains(index);
+	}
+	
+	@Override
+	public void setBoolean(int index, boolean value) {
+		if (value) {
+			booleans.add(index);
+		} else {
+			booleans.remove(index);
+		}
+	}
+	
 	@Override
 	public Object getObject(int index) {
 		return objects.get(index);

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

@@ -85,6 +85,21 @@ public class InspectingStatefulObjectLayout
 
 		}
 		
+		private class Boolean implements StateFieldBuilder.Boolean {
+			
+			@Override
+			public BooleanStateField build() {
+				return registerField(
+					new BooleanStateField(
+						id,
+						isLocal,
+						fieldIndexCounters.getBooleansThenIncrement()
+					)
+				);
+			}
+			
+		}
+		
 		private class Obj<T> implements StateFieldBuilder.Obj<T> {
 
 			private final ObjectCodec<T> codec;
@@ -123,6 +138,11 @@ public class InspectingStatefulObjectLayout
 			return new Int();
 		}
 		
+		@Override
+		public Boolean ofBoolean() {
+			return new Boolean();
+		}
+		
 		@Override
 		public <T> Obj<T> of(ObjectCodec<T> codec, Supplier<T> defaultValue) {
 			return new Obj<T>(codec, defaultValue);

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

@@ -21,11 +21,13 @@ package ru.windcorp.progressia.common.state;
 public class OptimizedStateStorage extends StateStorage {
 
 	private final int[] ints;
+	private final boolean[] booleans;
 	private final Object[] objects;
 
 	public OptimizedStateStorage(PrimitiveCounters sizes) {
-		this.ints = new int[sizes.getInts()];
+		this.ints = sizes.getInts() == 0 ? null : new int[sizes.getInts()];
-		this.objects = new Object[sizes.getObjects()];
+		this.booleans = sizes.getBooleans() == 0 ? null : new boolean[sizes.getBooleans()];
+		this.objects = sizes.getObjects() == 0 ? null : new Object[sizes.getObjects()];
 	}
 
 	@Override
@@ -38,6 +40,16 @@ public class OptimizedStateStorage extends StateStorage {
 		ints[index] = value;
 	}
 	
+	@Override
+	public boolean getBoolean(int index) {
+		return booleans[index];
+	}
+	
+	@Override
+	public void setBoolean(int index, boolean value) {
+		booleans[index] = value;
+	}
+	
 	@Override
 	public Object getObject(int index) {
 		return objects[index];

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

@@ -75,6 +75,16 @@ public class OptimizedStatefulObjectLayout
 			};
 		}
 		
+		@Override
+		public Boolean ofBoolean() {
+			return new Boolean() {
+				@Override
+				public BooleanStateField build() {
+					return (BooleanStateField) result;
+				}
+			};
+		}
+		
 		@Override
 		public <T> Obj<T> of(ObjectCodec<T> codec, Supplier<T> defaultValue) {
 			return new Obj<T>() {

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

@@ -21,6 +21,7 @@ package ru.windcorp.progressia.common.state;
 class PrimitiveCounters {
 
 	private int ints = 0;
+	private int booleans = 0;
 	private int objects = 0;
 
 	public PrimitiveCounters() {
@@ -28,6 +29,7 @@ class PrimitiveCounters {
 
 	public PrimitiveCounters(PrimitiveCounters copyFrom) {
 		this.ints = copyFrom.ints;
+		this.booleans = copyFrom.booleans;
 		this.objects = copyFrom.objects;
 	}
 
@@ -39,6 +41,14 @@ class PrimitiveCounters {
 		return this.ints++;
 	}
 	
+	public int getBooleans() {
+		return booleans;
+	}
+	
+	public int getBooleansThenIncrement() {
+		return this.booleans++;
+	}
+	
 	public int getObjects() {
 		return objects;
 	}

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

@@ -21,6 +21,7 @@ package ru.windcorp.progressia.common.state;
 public interface StateChanger {
 
 	void setInt(IntStateField field, int value);
+	void setBoolean(BooleanStateField field, boolean value);
 	<T> void setObject(ObjectStateField<T> field, T value);
 
 }

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

@@ -29,12 +29,18 @@ public interface StateFieldBuilder {
 		IntStateField build();
 	}
 	
+	public static interface Boolean {
+		BooleanStateField build();
+	}
+	
 	public static interface Obj<T> {
 		ObjectStateField<T> build();
 	}
 
 	Int ofInt();
 	
+	Boolean ofBoolean();
+	
 	<T> Obj<T> of(ObjectCodec<T> codec, Supplier<T> defaultValue);
 	
 	default <T> Obj<T> of(Class<T> clazz, Supplier<T> defaultValue) {

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

@@ -24,6 +24,10 @@ public abstract class StateStorage {
 
 	public abstract void setInt(int index, int value);
 	
+	public abstract boolean getBoolean(int index);
+
+	public abstract void setBoolean(int index, boolean value);
+	
 	public abstract Object getObject(int index);
 	
 	public abstract void setObject(int index, Object object);

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

@@ -42,6 +42,16 @@ public class StatefulObjectRegistry<T extends StatefulObject> {
 		 */
 		T build();
 	}
+	
+	@FunctionalInterface
+	public static interface IdFactory<T> {
+		/**
+		 * Initializes a new, independent instance of the stateful object.
+		 * 
+		 * @return the created object
+		 */
+		T build(String id);
+	}
 
 	protected static class Type<T> extends Namespaced {
 
@@ -110,5 +120,9 @@ public class StatefulObjectRegistry<T extends StatefulObject> {
 	public void register(String id, Factory<T> factory) {
 		registry.register(new Type<>(id, factory));
 	}
+	
+	public void register(String id, IdFactory<T> factory) {
+		register(id, () -> factory.build(id));
+	}
 
 }

src/main/java/ru/windcorp/progressia/common/world/entity/EntityDataPlayer.java

@@ -0,0 +1,102 @@
+/*
+ * 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.world.entity;
+
+import com.google.common.eventbus.EventBus;
+import com.google.common.eventbus.Subscribe;
+
+import ru.windcorp.progressia.common.state.IntStateField;
+import ru.windcorp.progressia.common.state.ObjectStateField;
+import ru.windcorp.progressia.common.util.crash.ReportingEventBus;
+import ru.windcorp.progressia.common.world.item.inventory.InventoryUser;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainerEquipment;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainerHand;
+import ru.windcorp.progressia.common.world.item.inventory.event.InventoryClosingEvent;
+import ru.windcorp.progressia.common.world.item.inventory.event.InventoryOpenedEvent;
+
+public class EntityDataPlayer extends EntityData implements InventoryUser {
+
+	private final ObjectStateField<SpeciesDatalet> speciesDatalet = field("Core:SpeciesDatalet").setShared()
+		.of(SpeciesDataRegistry.getInstance().getCodec()).build();
+	
+	private final IntStateField selectedHand = field("Core:SelectedHand").setShared().ofInt().build();
+	
+	private final EventBus eventBus = ReportingEventBus.create("EntityDataPlayer");
+
+	public EntityDataPlayer(String id, SpeciesData species) {
+		super(id);
+		
+		setSpecies(species);
+	}
+
+	private void setSpecies(SpeciesData species) {
+		speciesDatalet.setNow(this, species.createDatalet());
+		setCollisionModel(species.getCollisionModel());
+	}
+	
+	public SpeciesData getSpecies() {
+		return speciesDatalet.get(this).getSpecies();
+	}
+
+	public ItemContainerHand getHand(int index) {
+		return speciesDatalet.get(this).getHands()[index];
+	}
+	
+	public int getHandCount() {
+		return speciesDatalet.get(this).getHands().length;
+	}
+	
+	public ItemContainerEquipment getEquipmentSlot(int index) {
+		return speciesDatalet.get(this).getEquipment()[index];
+	}
+	
+	public int getEquipmentCount() {
+		return speciesDatalet.get(this).getEquipment().length;
+	}
+	
+	public int getSelectedHandIndex() {
+		return selectedHand.get(this);
+	}
+	
+	public void setSelectedHandIndexNow(int index) {
+		selectedHand.setNow(this, index);
+	}
+	
+	public ItemContainerHand getSelectedHand() {
+		return getHand(getSelectedHandIndex());
+	}
+	
+	@Subscribe
+	private void onInventoryOpened(InventoryOpenedEvent event) {
+		eventBus.post(event);
+	}
+	
+	@Subscribe
+	private void onInventoryClosed(InventoryClosingEvent event) {
+		eventBus.post(event);
+	}
+	
+	public void subscribe(Object listener) {
+		eventBus.register(listener);
+	}
+	
+	public void unsubscribe(Object listener) {
+		eventBus.unregister(listener);
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/world/entity/SpeciesCodec.java

@@ -0,0 +1,71 @@
+/*
+ * 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.world.entity;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+import ru.windcorp.progressia.common.state.IOContext;
+import ru.windcorp.progressia.common.state.codec.ObjectCodec;
+
+public class SpeciesCodec extends ObjectCodec<SpeciesDatalet> {
+
+	public SpeciesCodec() {
+		super(SpeciesDatalet.class);
+	}
+
+	@Override
+	protected SpeciesDatalet doRead(SpeciesDatalet previous, DataInput input, IOContext context) throws IOException {
+		String id = input.readUTF();
+		
+		SpeciesDatalet result = previous;
+		
+		if (result == null || !result.getSpecies().getId().equals(id)) {
+			SpeciesData species = SpeciesDataRegistry.getInstance().get(id);
+			if (species == null) {
+				throw new IOException("Unknown species ID " + species);
+			}
+			result = species.createDatalet();
+		}
+		
+		result.read(input, context);
+		
+		return result;
+	}
+
+	@Override
+	protected void doWrite(SpeciesDatalet obj, DataOutput output, IOContext context) throws IOException {
+		output.writeUTF(obj.getSpecies().getId());
+		obj.write(output, context);
+	}
+
+	@Override
+	public SpeciesDatalet copy(SpeciesDatalet object, SpeciesDatalet previous) {
+		SpeciesDatalet result = previous;
+		
+		if (result == null || result.getSpecies() != object.getSpecies()) {
+			result = object.getSpecies().createDatalet();
+		}
+		
+		object.copy(result);
+		
+		return result;
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/world/entity/SpeciesData.java

@@ -0,0 +1,116 @@
+/*
+ * 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.world.entity;
+
+import java.util.List;
+import java.util.function.Predicate;
+
+import com.google.common.collect.ImmutableList;
+
+import ru.windcorp.progressia.common.collision.CollisionModel;
+import ru.windcorp.progressia.common.util.Named;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
+import ru.windcorp.progressia.common.world.item.ItemData;
+
+public abstract class SpeciesData extends Namespaced {
+	
+	public static class Hand extends Named {
+
+		private int index = -1;
+		
+		public Hand(String name) {
+			super(name);
+		}
+		
+		public int getIndex() {
+			return index;
+		}
+		
+	}
+	
+	public static class EquipmentSlot extends Named {
+		
+		private int index = -1;
+		
+		private Predicate<ItemData> filter;
+		
+		public EquipmentSlot(String name, Predicate<ItemData> filter) {
+			super(name);
+			this.filter = filter;
+		}
+		
+		public int getIndex() {
+			return index;
+		}
+		
+		public Predicate<ItemData> getFilter() {
+			return filter;
+		}
+		
+	}
+	
+	private List<Hand> hands;
+	private List<EquipmentSlot> equipmentSlots;
+
+	public SpeciesData(String id) {
+		super(id);
+	}
+	
+	public void withHands(Hand... hands) {
+		if (this.hands != null) {
+			throw new IllegalStateException("Hands already set");
+		}
+		
+		if (hands.length == 0) {
+			throw new IllegalArgumentException("At least one hand required");
+		}
+		
+		this.hands = ImmutableList.copyOf(hands);
+		
+		for (int i = 0; i < hands.length; ++i) {
+			hands[i].index = i;
+		}
+	}
+	
+	public void withEquipmentSlots(EquipmentSlot... equipmentSlots) {
+		if (this.equipmentSlots != null) {
+			throw new IllegalStateException("Equipment slots already set");
+		}
+		
+		this.equipmentSlots = ImmutableList.copyOf(equipmentSlots);
+		
+		for (int i = 0; i < equipmentSlots.length; ++i) {
+			equipmentSlots[i].index = i;
+		}
+	}
+	
+	public List<Hand> getHands() {
+		return hands;
+	}
+	
+	public List<EquipmentSlot> getEquipmentSlots() {
+		return equipmentSlots;
+	}
+	
+	public abstract CollisionModel getCollisionModel();
+
+	public SpeciesDatalet createDatalet() {
+		return new SpeciesDatalet(this);
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/world/entity/SpeciesDataRegistry.java

@@ -0,0 +1,37 @@
+/*
+ * 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.world.entity;
+
+import ru.windcorp.progressia.common.state.codec.ObjectCodec;
+import ru.windcorp.progressia.common.util.namespaces.NamespacedInstanceRegistry;
+
+public class SpeciesDataRegistry extends NamespacedInstanceRegistry<SpeciesData> {
+	
+	private static final SpeciesDataRegistry INSTANCE = new SpeciesDataRegistry();
+	
+	private final ObjectCodec<SpeciesDatalet> codec = new SpeciesCodec();
+
+	public static SpeciesDataRegistry getInstance() {
+		return INSTANCE;
+	}
+	
+	public ObjectCodec<SpeciesDatalet> getCodec() {
+		return codec;
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/world/entity/SpeciesDatalet.java

@@ -0,0 +1,116 @@
+/*
+ * 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.world.entity;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+import ru.windcorp.progressia.common.state.Encodable;
+import ru.windcorp.progressia.common.state.IOContext;
+import ru.windcorp.progressia.common.world.entity.SpeciesData.EquipmentSlot;
+import ru.windcorp.progressia.common.world.entity.SpeciesData.Hand;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainerEquipment;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainerHand;
+
+public class SpeciesDatalet implements Encodable {
+
+	private final SpeciesData species;
+
+	private final ItemContainerHand[] hands;
+	private final ItemContainerEquipment[] equipment;
+
+	public SpeciesDatalet(SpeciesData species) {
+		this.species = species;
+
+		this.hands = new ItemContainerHand[species.getHands().size()];
+		for (int i = 0; i < hands.length; ++i) {
+			Hand hand = species.getHands().get(i);
+			this.hands[i] = new ItemContainerHand(species.getId() + "Hand" + hand.getName(), hand);
+		}
+
+		this.equipment = new ItemContainerEquipment[species.getEquipmentSlots().size()];
+		for (int i = 0; i < equipment.length; ++i) {
+			EquipmentSlot equipmentSlot = species.getEquipmentSlots().get(i);
+			this.equipment[i] = new ItemContainerEquipment(
+				species.getId() + "EquipmentSlot" + equipmentSlot.getName(),
+				equipmentSlot
+			);
+		}
+	}
+
+	public SpeciesData getSpecies() {
+		return species;
+	}
+
+	@Override
+	public void read(DataInput input, IOContext context) throws IOException {
+		for (int i = 0; i < hands.length; ++i) {
+			hands[i].read(input, context);
+		}
+
+		for (int i = 0; i < equipment.length; ++i) {
+			equipment[i].read(input, context);
+		}
+	}
+
+	@Override
+	public void write(DataOutput output, IOContext context) throws IOException {
+		for (int i = 0; i < hands.length; ++i) {
+			hands[i].write(output, context);
+		}
+
+		for (int i = 0; i < equipment.length; ++i) {
+			equipment[i].write(output, context);
+		}
+	}
+
+	@Override
+	public void copy(Encodable destination) {
+		SpeciesDatalet other = (SpeciesDatalet) destination;
+
+		if (other.getSpecies() != getSpecies()) {
+			throw new IllegalArgumentException(
+				"Cannot copy datalet of species " + other.getSpecies() + " into datalet of species " + getSpecies()
+			);
+		}
+		
+		for (int i = 0; i < hands.length; ++i) {
+			hands[i].copy(other.hands[i]);
+		}
+
+		for (int i = 0; i < equipment.length; ++i) {
+			equipment[i].copy(other.equipment[i]);
+		}
+	}
+	
+	/**
+	 * @return the hands
+	 */
+	public ItemContainerHand[] getHands() {
+		return hands;
+	}
+	
+	/**
+	 * @return the equipment
+	 */
+	public ItemContainerEquipment[] getEquipment() {
+		return equipment;
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/world/generic/ItemGeneric.java

@@ -0,0 +1,24 @@
+/*
+ * 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.world.generic;
+
+public interface ItemGeneric {
+
+	String getId();
+
+}

src/main/java/ru/windcorp/progressia/common/world/item/ItemData.java

@@ -0,0 +1,48 @@
+/*
+ * 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.world.item;
+
+import ru.windcorp.progressia.common.state.StatefulObject;
+import ru.windcorp.progressia.common.world.generic.ItemGeneric;
+
+/**
+ * An item identified by its ID and properties, able to reside in a slot.
+ */
+public abstract class ItemData extends StatefulObject implements ItemGeneric {
+
+	public ItemData(String id) {
+		super(ItemDataRegistry.getInstance(), id);
+	}
+
+	/**
+	 * Computes and returns the mass of a single unit (single item) of this
+	 * item.
+	 * 
+	 * @return the mass of this item
+	 */
+	public abstract float getMass();
+
+	/**
+	 * Computes and returns the volume of a single unit (single item) of this
+	 * item stack.
+	 * 
+	 * @return the volume of this item
+	 */
+	public abstract float getVolume();
+
+}

src/main/java/ru/windcorp/progressia/common/world/item/ItemDataContainer.java

@@ -0,0 +1,113 @@
+/*
+ * 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.world.item;
+
+import java.util.Iterator;
+
+import com.google.common.collect.Iterators;
+
+import ru.windcorp.progressia.common.state.ObjectStateField;
+import ru.windcorp.progressia.common.world.item.inventory.InventoryOwner;
+import ru.windcorp.progressia.common.world.item.inventory.InventorySimple;
+import ru.windcorp.progressia.common.world.item.inventory.InventoryUser;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainer;
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainerMixedSimple;
+
+public class ItemDataContainer extends ItemData implements InventoryOwner, ItemDataWithContainers {
+
+	private final ObjectStateField<InventorySimple> inventory = field("Core:Contents").setShared().def(this::createInventory)
+		.build();
+
+	private final float ownMass;
+	private final float containerMassLimit;
+
+	private final float ownVolume;
+	private final float containerVolumeLimit;
+	private final boolean containerContributesVolume;
+
+	public ItemDataContainer(
+		String id,
+		float ownMass,
+		float containerMassLimit,
+		float ownVolume,
+		float containerVolumeLimit,
+		boolean containerContributesVolume
+	) {
+		super(id);
+		this.ownMass = ownMass;
+		this.containerMassLimit = containerMassLimit;
+		this.ownVolume = ownVolume;
+		this.containerVolumeLimit = containerVolumeLimit;
+		this.containerContributesVolume = containerContributesVolume;
+	}
+
+	protected InventorySimple createInventory() {
+		return new InventorySimple(
+			getId(),
+			this,
+			new ItemContainerMixedSimple(getId(), containerMassLimit, containerVolumeLimit)
+		);
+	}
+	
+	public InventorySimple getInventory() {
+		return inventory.get(this);
+	}
+	
+	@Override
+	public Iterator<? extends ItemContainer> getAllContainers() {
+		return Iterators.forArray(getInventory().getContainers());
+	}
+
+	public boolean isOpen() {
+		return !getInventory().getUsers().isEmpty();
+	}
+
+	public boolean canOpen(InventoryUser user) {
+		return true;
+	}
+
+	public synchronized InventorySimple open(InventoryUser user) {
+		if (isOpen()) {
+			return null;
+		} else if (!canOpen(user)) {
+			return null;
+		} else {
+			getInventory().open(user);
+			return getInventory();
+		}
+	}
+
+	public synchronized void close() {
+		getInventory().closeAll();
+	}
+
+	@Override
+	public float getMass() {
+		return ownMass + getInventory().getMass();
+	}
+
+	@Override
+	public float getVolume() {
+		if (containerContributesVolume) {
+			return ownVolume + getInventory().getVolume();
+		} else {
+			return ownVolume;
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/world/item/ItemDataRegistry.java

@@ -0,0 +1,30 @@
+/*
+ * 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.world.item;
+
+import ru.windcorp.progressia.common.state.StatefulObjectRegistry;
+
+public class ItemDataRegistry extends StatefulObjectRegistry<ItemData> {
+	
+	private static final ItemDataRegistry INSTANCE = new ItemDataRegistry();
+	
+	public static ItemDataRegistry getInstance() {
+		return INSTANCE;
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/world/item/ItemDataSimple.java

@@ -15,26 +15,27 @@
  * 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.util.crash.providers;
+package ru.windcorp.progressia.common.world.item;
 
-import java.util.Map;
+public class ItemDataSimple extends ItemData {
 
-import ru.windcorp.progressia.Progressia;
+	private final float mass;
-import ru.windcorp.progressia.common.util.crash.ContextProvider;
+	private final float volume;
-
+	
-public class VersionProvider implements ContextProvider {
+	public ItemDataSimple(String id, float mass, float volume) {
-
+		super(id);
-	@Override
+		this.mass = mass;
-	public void provideContext(Map<String, String> output) {
+		this.volume = volume;
-		output.put("Version", Progressia.getVersion());
-		output.put("Git commit", Progressia.getGitCommit());
-		output.put("Git branch", Progressia.getGitBranch());
-		output.put("Build ID", Progressia.getBuildId());
 	}
-
+	
 	@Override
-	public String getName() {
+	public float getMass() {
-		return "Version Provider";
+		return mass;
+	}
+	
+	@Override
+	public float getVolume() {
+		return volume;
 	}
 
 }

src/main/java/ru/windcorp/progressia/common/world/item/ItemDataWithContainers.java

@@ -0,0 +1,28 @@
+/*
+ * 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.world.item;
+
+import java.util.Iterator;
+
+import ru.windcorp.progressia.common.world.item.inventory.ItemContainer;
+
+public interface ItemDataWithContainers {
+	
+	Iterator<? extends ItemContainer> getAllContainers();
+
+}