Refactored build scripts and removed unused dependencies

- Added the following Gradle tasks:
  - buildLocal (alias for build)
  - buildCrossPlatform (builds with all natives)
  - packageDebian
  - packageWindows
- Gradle no longer downloads or packages natives for wrong platforms
(unless buildCrossPlatform or require*Dependencies is run)
- Gradle should no longer complain about deprecated features
- buildPackages.sh is now a lot more robust
- Removed the following dependencies:
  - Apache Commons Math
  - Everything in LWJGL except OpenGL/AL, GLFW, STB and core

build.gradle

@@ -1,31 +1,90 @@
+/*
+ * build.gradle for Progressia
+ */
+
 plugins {
     // Apply the java-library plugin to add support for Java Library
     id 'java-library'
+    
+    /*
+     * 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'
 }
 
+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
+}
+
+compileJava {
+	/*
+	 * We want to compile for Java 8.
+	 * If we are using JDK 8, no further action is required.
+	 * However, on JDK 9 and later versions, '--release' option is required,
+	 * which is missing on JDK 8.
+	 */
+    if (JavaVersion.current() != JavaVersion.VERSION_1_8) {
+        options.compilerArgs.addAll(['--release', '8'])
+    }
+}
+
+/*
+ * Dependencies
+ */
+
 repositories {
 	mavenCentral()
     jcenter()
     
-    maven { url 'http://windcorp.ru/./maven' }
+    /*
+     * Specify Windcorp Maven repository
+     * Currently used by:
+     *   - ru.windcorp.fork.io.github.java-graphics:glm:1.0.1
+     */
+    maven { url 'https://windcorp.ru/./maven' }
 }
 
 dependencies {
-    implementation 'org.apache.commons:commons-math3:3.6.1'
+	// Google Guava
+	//   A generic utilities library
     implementation 'com.google.guava:guava:30.0-jre'
+    
+    // Trove4j
+    //   Provides optimized Collections for primitive types
     implementation 'net.sf.trove4j:trove4j:3.0.3'
     
+    // java-graphics
+    //   A GLM (OpenGL Mathematics) port to Java
+    //   Unfortunately, Maven Central Repository provides an outdated version of this library, which contains several critical bugs
     implementation 'ru.windcorp.fork.io.github.java-graphics:glm:1.0.1'
 
-	// log4j
+	// Log4j
+	//   A logging library
 	implementation group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.13.3'
 	implementation group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.13.3'
 
+	// JUnit
+	//   A unit-testing library
 	testImplementation 'junit:junit:4.12'
 	
-	// See also LWJGL dependencies below
+	// See LWJGL dependencies below
 }
 
+/*
+ * Progressia uses the following LWJGL libraries:
+ *   - Core libraries
+ *   - OpenGL
+ *   - OpenAL
+ *   - GLFW
+ *   - STB
+ */
+
 /*
  *          LWJGL
  * (auto-generated script)
@@ -55,94 +114,169 @@ dependencies {
 	implementation platform("org.lwjgl:lwjgl-bom:$lwjglVersion")
 
 	implementation "org.lwjgl:lwjgl"
-	implementation "org.lwjgl:lwjgl-assimp"
-	implementation "org.lwjgl:lwjgl-bgfx"
 	implementation "org.lwjgl:lwjgl-glfw"
-	implementation "org.lwjgl:lwjgl-nanovg"
-	implementation "org.lwjgl:lwjgl-nuklear"
 	implementation "org.lwjgl:lwjgl-openal"
 	implementation "org.lwjgl:lwjgl-opengl"
-	implementation "org.lwjgl:lwjgl-par"
 	implementation "org.lwjgl:lwjgl-stb"
-	implementation "org.lwjgl:lwjgl-vulkan"
+	
-	runtimeOnly "org.lwjgl:lwjgl::$lwjglNatives"
+	// Not adding runtimeOnly native libraries because natives are handled by addNativeDependencies
-	runtimeOnly "org.lwjgl:lwjgl-assimp::$lwjglNatives"
-	runtimeOnly "org.lwjgl:lwjgl-bgfx::$lwjglNatives"
-	runtimeOnly "org.lwjgl:lwjgl-glfw::$lwjglNatives"
-	runtimeOnly "org.lwjgl:lwjgl-nanovg::$lwjglNatives"
-	runtimeOnly "org.lwjgl:lwjgl-nuklear::$lwjglNatives"
-	runtimeOnly "org.lwjgl:lwjgl-openal::$lwjglNatives"
-	runtimeOnly "org.lwjgl:lwjgl-opengl::$lwjglNatives"
-	runtimeOnly "org.lwjgl:lwjgl-par::$lwjglNatives"
-	runtimeOnly "org.lwjgl:lwjgl-stb::$lwjglNatives"
-	if (lwjglNatives == "natives-macos") runtimeOnly "org.lwjgl:lwjgl-vulkan::$lwjglNatives"
 }
 
 // LWJGL END
 
-configurations {
+/*
-    packageOnly 
+ * Tasks
-    packageLibraries.extendsFrom runtimeClasspath
+ */
-    packageLibraries.extendsFrom packageOnly
+
+/*
+ * Additional native libraries specification
+ */
+
+project.ext.platforms = new ArrayList<>()
+
+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")
 		}
 		
 		dependencies {
-    def archs = ['natives-linux', 'natives-linux-arm64', 'natives-linux-arm32', 'natives-macos', 'natives-windows', 'natives-windows-x86']
-    
 			archs.each { arch ->
-        packageOnly "org.lwjgl:lwjgl::$arch"
+		        runtimeOnly "org.lwjgl:lwjgl::$arch"
-        packageOnly "org.lwjgl:lwjgl-assimp::$arch"
+		        runtimeOnly "org.lwjgl:lwjgl-glfw::$arch"
-        packageOnly "org.lwjgl:lwjgl-bgfx::$arch"
+		        runtimeOnly "org.lwjgl:lwjgl-openal::$arch"
-        packageOnly "org.lwjgl:lwjgl-glfw::$arch"
+		        runtimeOnly "org.lwjgl:lwjgl-opengl::$arch"
-        packageOnly "org.lwjgl:lwjgl-nanovg::$arch"
+		        runtimeOnly "org.lwjgl:lwjgl-stb::$arch"
-        packageOnly "org.lwjgl:lwjgl-nuklear::$arch"
+		    }
-        packageOnly "org.lwjgl:lwjgl-openal::$arch"
+	    }
-        packageOnly "org.lwjgl:lwjgl-opengl::$arch"
+    }
-        packageOnly "org.lwjgl:lwjgl-par::$arch"
-        packageOnly "org.lwjgl:lwjgl-stb::$arch"
 }
 
-    packageOnly "org.lwjgl:lwjgl-vulkan::natives-macos"
+compileJava.mustRunAfter addNativeDependencies // Make sure runtimeOnly has not been resolved
+
+task requireLinuxDependencies {
+    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 requireWindowsDependencies {
+    description 'Adds windows and windows-x86 native libraries to built artifacts.'
+	doFirst {
+		project.ext.platforms.addAll(['natives-windows', 'natives-windows-x86'])
+	}
+}
+task requireMacOSDependencies {
+    description 'Adds macos native libraries to built artifacts.'
+	doFirst {
+		project.ext.platforms.addAll(['natives-macos'])
+	}
 }
 
+def dependencySpecificationTasks = tasks.findAll { task -> task.name.startsWith('require') && task.name.endsWith('Dependencies') }
+
+task requireCrossPlatformDependencies {
+    description 'Adds native libraries for all available platforms to built artifacts.'
+	dependsOn dependencySpecificationTasks
+}
+
+addNativeDependencies.mustRunAfter dependencySpecificationTasks
+
+/*
+ * Manifest specification
+ */
+
+task specifyLocalManifest {
+	dependsOn addNativeDependencies // Make sure all native dependencies are specified
+
+	doFirst {
 		jar {
 		    manifest {
 		        attributes(
 		        	"Main-Class": "ru.windcorp.progressia.client.ProgressiaClientMain",
-        	"Class-Path": configurations.packageLibraries.collect { "lib/" + it.getName() }.join(' ')
+		        	"Class-Path": configurations.runtimeClasspath.collect { "lib/" + it.getName() } .join(' ')
 		        )
 		    }
 		}
+	}
+}
+
+build.dependsOn specifyLocalManifest
 
 /*
- * Copies runtime dependencies to a prespecified location so they can be packaged properly.
+ * Library export
  */
+ 
 task copyLibs(type: Copy) {
-    into "${libsDir}/lib"
+	mustRunAfter addNativeDependencies
+
+    into libsDirectory.get().getAsFile().getPath() + "/lib"
     from configurations.runtimeClasspath
 }
 
 build.dependsOn(copyLibs)
 
-task copyLibsForPackaging(type: Copy) {
+/*
-    into "${libsDir}/lib"
+ * Packaging
-    from configurations.packageLibraries
+ */
-}
 
-task createPackages(type: Exec) {
+task packageDebian(type: Exec) {
-    commandLine './buildPackages.sh'
+    description 'Builds the project and creates a Debain package.'
-}
+    group 'Progressia'
     
-java {
+    dependsOn build
-    sourceCompatibility = JavaVersion.VERSION_1_8
+    dependsOn requireLinuxDependencies
-    targetCompatibility = JavaVersion.VERSION_1_8
-}
     
-compileJava {
+    commandLine './buildPackages.sh', 'debian'
-    if (JavaVersion.current() != JavaVersion.VERSION_1_8) {
+    
-        options.compilerArgs.addAll(['--release', '8'])
+    doLast {
+        println "Debian package available in build_packages/"
     }
 }
 
-createPackages.dependsOn(build)
+task packageWindows(type: Exec) {
-createPackages.dependsOn(copyLibsForPackaging)
+    description 'Builds the project and creates a Windows installer.'
+    group 'Progressia'
+    
+    dependsOn build
+    dependsOn requireWindowsDependencies
+    
+    commandLine './buildPackages.sh', 'windows'
+    
+    doLast {
+        println "Windows installer available in build_packages/"
+    }
+}
+
+task buildCrossPlatform {
+    description 'Builds the project including native libraries for all available platforms.'
+    group 'Progressia'
+    
+    dependsOn requireCrossPlatformDependencies
+    dependsOn build
+    
+    doLast {
+        println "Native libraries for all platforms have been added"
+    }
+}
+
+task buildLocal {
+    description "Builds the project including only native libraries for current platform ($lwjglNatives)."
+    group 'Progressia'
+    
+    dependsOn build
+    
+    doLast {
+        println "Native libraries only for platform $lwjglNatives have been added"
+    }
+}

buildPackages.sh

@@ -1,38 +1,159 @@
 #!/bin/bash
 
-lst="nsis"
+echoerr() { echo "$@" 1>&2; }
 
-user=`whoami`
+buildDebianPackage() {
 
-dpkg -l 2>/dev/null > ls.tmp
+    # Commands that must be available to execute this action
+    requiredCommands='dpkg-deb fakeroot'
     
-for items in $lst
+    # Version that the package will receive
-do
+    version='0.1_all'
-  cmd=$(grep "\ $items\ " ls.tmp)
+    
-  if [ $? == 0 ]
+    directory="build_packages/DEB/progressia-$version"
-    then
+    
-      echo "$items installed!"
+    # .deb control file that must be present
-      echo "Building..."
+    configurationFile="$directory/DEBIAN/control"
+    
+    outputFile="build_packages/DEB/progressia-$version.deb"
+
+    echo "Checking environment to build Debian package"
+    
+    for item in $requiredCommands; do
+        if command -v "$item" &> /dev/null; then
+            echo "- $item found"
         else
-      echo "Package $items not found! Please install $items."
+            echoerr "Command $item not found, cannot package"
-      rm ls.tmp
+            exit 100
-      exit 1
         fi
     done
-rm ls.tmp
     
-cd build_packages/DEB/progressia-0.1_all/
+    if ! [ -r "$configurationFile" ]; then
-mkdir -p home/$user/Progressia
+        echoerr "$configurationFile is missing or not readable, cannot package"
+        exit 101
+    else
+        echo "- $configurationFile is present and readable"
+    fi
     
-cd ../../..
+    echo "Environment OK; packaging Debian package"
+    exitCode=0
     
-cp -r build/libs/lib build_packages/DEB/progressia-0.1_all/home/$user/Progressia/
+    {
-cp build/libs/Progressia.jar build_packages/DEB/progressia-0.1_all/home/$user/Progressia/
+        user=`whoami`
-cp -r build/libs/lib build_packages/NSIS
+        homeDir="$directory/home/$user/Progressia/"
-cp build/libs/Progressia.jar build_packages/NSIS
         
-makensis build_packages/NSIS/ProgressiaInstaller.nsi
+        mkdir -p "$homeDir"                                         &&
-mv build_packages/NSIS/ProgressiaInstaller.exe build_packages/Progressia.exe
+        cp -r 'build/libs/lib'            "$homeDir/lib"            &&
-fakeroot dpkg-deb --build build_packages/DEB/progressia-0.1_all
+        cp    'build/libs/Progressia.jar' "$homeDir/Progressia.jar" &&
-mv build_packages/DEB/progressia-0.1_all.deb build_packages/progressia-0.1_all.deb
+        echo "------ DPKG-DEB ------"                               &&
-echo "Build done!"
+        fakeroot dpkg-deb --build "$directory"                      &&
+        echo "---- DPKG-DEB END ----"                               &&
+        mv "$outputFile" build_packages
+    } || {
+        echoerr "Could not create Debian package"
+        exitCode=1
+    }
+    
+    {
+        if [ -d "$homeDir" ]; then
+            rm -r "$homeDir"
+        fi
+        echo "Cleaned up"
+    } || {
+        echoerr "Could not clean up after packaging Debian package"
+        exitCode=2
+    }
+}
+
+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 "- $configurationFile is present and readable"
+    fi
+    
+    echo "Environment OK; building Windows installer"
+    exitCode=0
+    
+    {
+        cp -r 'build/libs/lib'            'build_packages/NSIS/lib'            &&
+        cp    'build/libs/Progressia.jar' 'build_packages/NSIS/Progressia.jar' &&
+        echo "------ NSIS ------"                                              &&
+        makensis "$configurationFile"                                          &&
+        echo "---- NSIS END ----"                                              &&
+        mv "$outputFile" build_packages
+    } || {
+        echoerr "Could not build Windows installer"
+        exitCode=1
+    }
+    
+    {
+        if [ -d 'build_packages/NSIS/lib' ]; then
+            rm -r 'build_packages/NSIS/lib'
+        fi
+        if [ -e 'build_packages/NSIS/Progressia.jar' ]; then
+            rm 'build_packages/NSIS/Progressia.jar'
+        fi
+        echo "Cleaned up"
+    } || {
+        echoerr "Could not clean up after building Windows installer"
+        exitCode=2
+    }
+    
+    exit "$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

src/main/java/ru/windcorp/progressia/common/util/FloatMathUtils.java

@@ -1,13 +1,11 @@
 package ru.windcorp.progressia.common.util;
 
-import org.apache.commons.math3.util.FastMath;
-
 public class FloatMathUtils {
 	
 	public static final float PI_F = (float) Math.PI;
 	
 	public static float floor(float x) {
-		return (float) FastMath.floor(x);
+		return (float) Math.floor(x);
 	}
 	
 	public static float normalizeAngle(float a) {