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eldek
2026-04-05 17:17:46 -03:00
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# https://editorconfig.org
root = true
[*]
indent_style = space
end_of_line = lf
charset = utf-8
trim_trailing_whitespace = true
insert_final_newline = true
[*.{java,scala,groovy,kt,kts}]
indent_size = 4
[*.gradle]
indent_size = 2
[*.md]
trim_trailing_whitespace = false

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* text=auto eol=lf
*.bat text=auto eol=crlf

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## Gradle:
.gradle/
gradle-app.setting
/build/
/android/build/
/core/build/
/lwjgl2/build/
/lwjgl3/build/
/html/build/
/teavm/build/
/ios/build/
/ios-moe/build/
/headless/build/
/server/build/
/shared/build/
## Java:
*.class
*.war
*.ear
hs_err_pid*
.attach_pid*
## Android:
/android/libs/armeabi-v7a/
/android/libs/arm64-v8a/
/android/libs/x86/
/android/libs/x86_64/
/android/gen/
/android/out/
local.properties
com_crashlytics_export_strings.xml
## Robovm:
/ios/robovm-build/
## iOS:
/ios/xcode/*.xcodeproj/*
!/ios/xcode/*.xcodeproj/xcshareddata
!/ios/xcode/*.xcodeproj/project.pbxproj
/ios/xcode/native/
/ios/IOSLauncher.app
/ios/IOSLauncher.app.dSYM
## GWT:
/html/war/
/html/gwt-unitCache/
.apt_generated/
/html/war/WEB-INF/deploy/
/html/war/WEB-INF/classes/
.gwt/
gwt-unitCache/
www-test/
.gwt-tmp/
## TeaVM:
# Not sure yet...
## IntelliJ, Android Studio:
.idea/
*.ipr
*.iws
*.iml
## Eclipse:
.classpath
.project
.metadata/
/android/bin/
/core/bin/
/lwjgl2/bin/
/lwjgl3/bin/
/html/bin/
/teavm/bin/
/ios/bin/
/ios-moe/bin/
/headless/bin/
/server/bin/
/shared/bin/
*.tmp
*.bak
*.swp
*~.nib
.settings/
.loadpath
.externalToolBuilders/
*.launch
## NetBeans:
/nbproject/private/
/android/nbproject/private/
/core/nbproject/private/
/lwjgl2/nbproject/private/
/lwjgl3/nbproject/private/
/html/nbproject/private/
/teavm/nbproject/private/
/ios/nbproject/private/
/ios-moe/nbproject/private/
/headless/nbproject/private/
/server/nbproject/private/
/shared/nbproject/private/
/nbbuild/
/android/nbbuild/
/core/nbbuild/
/lwjgl2/nbbuild/
/lwjgl3/nbbuild/
/html/nbbuild/
/teavm/nbbuild/
/ios/nbbuild/
/ios-moe/nbbuild/
/headless/nbbuild/
/server/nbbuild/
/shared/nbbuild/
/dist/
/android/dist/
/core/dist/
/lwjgl2/dist/
/lwjgl3/dist/
/html/dist/
/teavm/dist/
/ios/dist/
/ios-moe/dist/
/headless/dist/
/server/dist/
/shared/dist/
/nbdist/
/android/nbdist/
/core/nbdist/
/lwjgl2/nbdist/
/lwjgl3/nbdist/
/html/nbdist/
/teavm/nbdist/
/ios/nbdist/
/ios-moe/nbdist/
/headless/nbdist/
/server/nbdist/
/shared/nbdist/
nbactions.xml
nb-configuration.xml
## OS-Specific:
.DS_Store
Thumbs.db
## Miscellaneous:
*~
*.*#
*#*#
/.kotlin/
/assets/assets.txt
## Special cases:
## There is a resource-config.json file generated by nativeimage.gradle if you use Graal Native Image.
## Some usage may need extra resource configuration in a different file with the same name.
## You could also add that configuration to the text in nativeimage.gradle .
## You should delete or comment out the next line if you have configuration in a different resource-config.json .
**/resource-config.json

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# multiplayer-kryonet
A [libGDX](https://libgdx.com/) project generated with [gdx-liftoff](https://github.com/libgdx/gdx-liftoff).
This project was generated with a template including simple application launchers and an `ApplicationAdapter` extension that draws libGDX logo.
## Platforms
- `core`: Main module with the application logic shared by all platforms.
- `lwjgl3`: Primary desktop platform using LWJGL3; was called 'desktop' in older docs.
## Gradle
This project uses [Gradle](https://gradle.org/) to manage dependencies.
The Gradle wrapper was included, so you can run Gradle tasks using `gradlew.bat` or `./gradlew` commands.
Useful Gradle tasks and flags:
- `--continue`: when using this flag, errors will not stop the tasks from running.
- `--daemon`: thanks to this flag, Gradle daemon will be used to run chosen tasks.
- `--offline`: when using this flag, cached dependency archives will be used.
- `--refresh-dependencies`: this flag forces validation of all dependencies. Useful for snapshot versions.
- `build`: builds sources and archives of every project.
- `cleanEclipse`: removes Eclipse project data.
- `cleanIdea`: removes IntelliJ project data.
- `clean`: removes `build` folders, which store compiled classes and built archives.
- `eclipse`: generates Eclipse project data.
- `idea`: generates IntelliJ project data.
- `lwjgl3:jar`: builds application's runnable jar, which can be found at `lwjgl3/build/libs`.
- `lwjgl3:run`: starts the application.
- `test`: runs unit tests (if any).
Note that most tasks that are not specific to a single project can be run with `name:` prefix, where the `name` should be replaced with the ID of a specific project.
For example, `core:clean` removes `build` folder only from the `core` project.

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buildscript {
repositories {
mavenCentral()
gradlePluginPortal()
mavenLocal()
google()
maven { url = 'https://central.sonatype.com/repository/maven-snapshots/' }
}
dependencies {
}
}
allprojects {
apply plugin: 'eclipse'
apply plugin: 'idea'
// This allows you to "Build and run using IntelliJ IDEA", an option in IDEA's Settings.
idea {
module {
outputDir = file('build/classes/java/main')
testOutputDir = file('build/classes/java/test')
}
}
}
configure(subprojects) {
apply plugin: 'java-library'
java.sourceCompatibility = 21
// From https://lyze.dev/2021/04/29/libGDX-Internal-Assets-List/
// The article can be helpful when using assets.txt in your project.
tasks.register('generateAssetList') {
inputs.dir("${project.rootDir}/assets/")
// projectFolder/assets
File assetsFolder = new File("${project.rootDir}/assets/")
// projectFolder/assets/assets.txt
File assetsFile = new File(assetsFolder, "assets.txt")
// delete that file in case we've already created it
assetsFile.delete()
// iterate through all files inside that folder
// convert it to a relative path
// and append it to the file assets.txt
fileTree(assetsFolder).collect { assetsFolder.relativePath(it) }.sort().each {
assetsFile.append(it + "\n")
}
}
processResources.dependsOn 'generateAssetList'
compileJava {
options.incremental = true
}
}
subprojects {
version = "$projectVersion"
ext.appName = 'multiplayer-kryonet'
repositories {
mavenCentral()
// You may want to remove the following line if you have errors downloading dependencies.
mavenLocal()
maven { url = 'https://central.sonatype.com/repository/maven-snapshots/' }
maven { url = 'https://jitpack.io' }
}
}
eclipse.project.name = 'multiplayer-kryonet' + '-parent'

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[compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
eclipse.project.name = appName + '-core'
dependencies {
api "com.badlogicgames.gdx:gdx:$gdxVersion"
api "com.github.crykn:kryonet:$kryoNetVersion"
implementation project(':shared')
if(enableGraalNative == 'true') {
implementation "io.github.berstanio:gdx-svmhelper-annotations:$graalHelperVersion"
implementation(project(":shared"))
}
}
jar {
duplicatesStrategy = DuplicatesStrategy.EXCLUDE
}

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core/src/main/java/io/github/eldek0/Main.java Normal file
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package io.github.eldek0;
import com.badlogic.gdx.Game;
import io.github.eldek0.game.MultiplayerScreen;
public class Main extends Game {
@Override
public void create() {
setScreen(new MultiplayerScreen());
}
@Override
public void dispose() {
super.dispose();
}
}

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core/src/main/java/io/github/eldek0/game/MultiplayerScreen.java Normal file
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package io.github.eldek0.game;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input;
import com.badlogic.gdx.Screen;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import io.github.eldek0.network.GameClient;
import io.github.eldek0.network.NetworkPackets;
public class MultiplayerScreen implements Screen {
private ShapeRenderer shapeRenderer;
private GameClient gameClient;
private float x = 100;
private float y = 100;
private float speed = 200f;
private float sendTimer = 0f;
@Override
public void show() {
shapeRenderer = new ShapeRenderer();
gameClient = new GameClient();
try {
gameClient.connect("127.0.0.1", "Jugador");
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void render(float delta) {
update(delta);
Gdx.gl.glClearColor(0.15f, 0.15f, 0.2f, 1f);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
shapeRenderer.begin(ShapeRenderer.ShapeType.Filled);
for (NetworkPackets.PlayerState player : gameClient.getPlayers().values()) {
shapeRenderer.rect(player.x, player.y, 32, 32);
}
shapeRenderer.end();
}
private void update(float delta) {
boolean moved = false;
if (Gdx.input.isKeyPressed(Input.Keys.W)) {
y += speed * delta;
moved = true;
}
if (Gdx.input.isKeyPressed(Input.Keys.S)) {
y -= speed * delta;
moved = true;
}
if (Gdx.input.isKeyPressed(Input.Keys.A)) {
x -= speed * delta;
moved = true;
}
if (Gdx.input.isKeyPressed(Input.Keys.D)) {
x += speed * delta;
moved = true;
}
sendTimer += delta;
if (moved && sendTimer >= 0.05f) {
gameClient.sendMyPosition(x, y);
sendTimer = 0f;
}
}
@Override
public void resize(int width, int height) {
}
@Override
public void pause() {
}
@Override
public void resume() {
}
@Override
public void hide() {
}
@Override
public void dispose() {
if (shapeRenderer != null) shapeRenderer.dispose();
if (gameClient != null) gameClient.stop();
}
}

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core/src/main/java/io/github/eldek0/network/GameClient.java Normal file
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package io.github.eldek0.network;
import com.esotericsoftware.kryonet.Client;
import com.esotericsoftware.kryonet.Connection;
import com.esotericsoftware.kryonet.Listener;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class GameClient {
private final Client client;
private final Map<Integer, NetworkPackets.PlayerState> players = new ConcurrentHashMap<>();
private int myId = -1;
public GameClient() {
client = new Client();
Network.register(client);
client.addListener(new Listener() {
@Override
public void received(Connection connection, Object object) {
if (object instanceof NetworkPackets.PlayerConnected packet) {
NetworkPackets.PlayerState player = new NetworkPackets.PlayerState();
player.id = packet.id;
player.name = packet.name;
player.x = packet.x;
player.y = packet.y;
players.put(player.id, player);
if (packet.id == connection.getID()) {
myId = packet.id;
}
}
if (object instanceof NetworkPackets.PlayerDisconnected packet) {
players.remove(packet.id);
}
if (object instanceof NetworkPackets.PlayerMove packet) {
NetworkPackets.PlayerState player = players.get(packet.id);
if (player != null) {
player.x = packet.x;
player.y = packet.y;
}
}
if (object instanceof NetworkPackets.WorldState packet) {
players.clear();
for (NetworkPackets.PlayerState p : packet.players) {
players.put(p.id, p);
}
}
}
});
}
public void connect(String host, String name) throws IOException {
client.start();
client.connect(5000, host, Network.TCP_PORT, Network.UDP_PORT);
NetworkPackets.Login login = new NetworkPackets.Login();
login.name = name;
client.sendTCP(login);
}
public void sendMyPosition(float x, float y) {
if (!client.isConnected() || myId == -1) return;
NetworkPackets.PlayerMove move = new NetworkPackets.PlayerMove();
move.id = myId;
move.x = x;
move.y = y;
client.sendUDP(move);
}
public Map<Integer, NetworkPackets.PlayerState> getPlayers() {
return players;
}
public int getMyId() {
return myId;
}
public boolean isConnected() {
return client.isConnected();
}
public void stop() {
client.stop();
}
}

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# This doesn't need to be false, and some projects may be able to take advantage of setting daemon to true.
# We set it to false by default in order to avoid too many daemons from being created and persisting; each needs RAM.
org.gradle.daemon=false
# Sets starting memory usage to 512MB, maximum memory usage to 1GB, and tries to set as much to use Unicode as we can.
org.gradle.jvmargs=-Xms512M -Xmx1G -Dfile.encoding=UTF-8 -Dconsole.encoding=UTF-8
# "Configure on-demand" must be false because it breaks projects that have Android modules. The default is also false.
org.gradle.configureondemand=false
# The logging level determines which messages get shown about how Gradle itself is working, such as if build.gradle
# files are fully future-proof (which they never are, because Gradle constantly deprecates working APIs).
# You can change 'quiet' below to 'lifecycle' to use Gradle's default behavior, which shows some confusing messages.
# You could instead change 'quiet' below to 'info' to see info that's important mainly while debugging build files.
# Note that if you want to use Gradle Build Scans, you should set the below logging level to 'lifecycle', otherwise
# the link to the scan won't get shown at all.
# Documented at: https://docs.gradle.org/current/userguide/command_line_interface.html#sec:command_line_logging
org.gradle.logging.level=quiet
kryoNetVersion=2.22.9
graalHelperVersion=2.0.1
enableGraalNative=false
gdxVersion=1.14.0
projectVersion=1.0.0

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#This file is generated by updateDaemonJvm
toolchainUrl.FREE_BSD.AARCH64=https\://api.foojay.io/disco/v3.0/ids/df211d3c3eefdc408b462041881bc575/redirect
toolchainUrl.FREE_BSD.X86_64=https\://api.foojay.io/disco/v3.0/ids/93aeea858331bd6bb00ba94759830234/redirect
toolchainUrl.LINUX.AARCH64=https\://api.foojay.io/disco/v3.0/ids/df211d3c3eefdc408b462041881bc575/redirect
toolchainUrl.LINUX.X86_64=https\://api.foojay.io/disco/v3.0/ids/b41931cf1e70bc8e08d7dd19c343ef00/redirect
toolchainUrl.MAC_OS.AARCH64=https\://api.foojay.io/disco/v3.0/ids/3426ffcaa54c3f62406beb1f1ab8b179/redirect
toolchainUrl.MAC_OS.X86_64=https\://api.foojay.io/disco/v3.0/ids/d6690dfd71c4c91e08577437b5b2beb0/redirect
toolchainUrl.UNIX.AARCH64=https\://api.foojay.io/disco/v3.0/ids/df211d3c3eefdc408b462041881bc575/redirect
toolchainUrl.UNIX.X86_64=https\://api.foojay.io/disco/v3.0/ids/b41931cf1e70bc8e08d7dd19c343ef00/redirect
toolchainUrl.WINDOWS.AARCH64=https\://api.foojay.io/disco/v3.0/ids/1e91f45234d88a64dafb961c93ddc75a/redirect
toolchainUrl.WINDOWS.X86_64=https\://api.foojay.io/disco/v3.0/ids/552c7bffe0370c66410a51c55985b511/redirect
toolchainVersion=21

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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.0-bin.zip
networkTimeout=10000
validateDistributionUrl=true
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

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#!/bin/sh
#
# Copyright © 2015 the original authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# SPDX-License-Identifier: Apache-2.0
#
##############################################################################
#
# Gradle start up script for POSIX generated by Gradle.
#
# Important for running:
#
# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
# noncompliant, but you have some other compliant shell such as ksh or
# bash, then to run this script, type that shell name before the whole
# command line, like:
#
# ksh Gradle
#
# Busybox and similar reduced shells will NOT work, because this script
# requires all of these POSIX shell features:
# * functions;
# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
# * compound commands having a testable exit status, especially «case»;
# * various built-in commands including «command», «set», and «ulimit».
#
# Important for patching:
#
# (2) This script targets any POSIX shell, so it avoids extensions provided
# by Bash, Ksh, etc; in particular arrays are avoided.
#
# The "traditional" practice of packing multiple parameters into a
# space-separated string is a well documented source of bugs and security
# problems, so this is (mostly) avoided, by progressively accumulating
# options in "$@", and eventually passing that to Java.
#
# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
# see the in-line comments for details.
#
# There are tweaks for specific operating systems such as AIX, CygWin,
# Darwin, MinGW, and NonStop.
#
# (3) This script is generated from the Groovy template
# https://github.com/gradle/gradle/blob/b631911858264c0b6e4d6603d677ff5218766cee/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
# within the Gradle project.
#
# You can find Gradle at https://github.com/gradle/gradle/.
#
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
app_path=$0
# Need this for daisy-chained symlinks.
while
APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
[ -h "$app_path" ]
do
ls=$( ls -ld "$app_path" )
link=${ls#*' -> '}
case $link in #(
/*) app_path=$link ;; #(
*) app_path=$APP_HOME$link ;;
esac
done
# This is normally unused
# shellcheck disable=SC2034
APP_BASE_NAME=${0##*/}
# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD=maximum
warn () {
echo "$*"
} >&2
die () {
echo
echo "$*"
echo
exit 1
} >&2
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "$( uname )" in #(
CYGWIN* ) cygwin=true ;; #(
Darwin* ) darwin=true ;; #(
MSYS* | MINGW* ) msys=true ;; #(
NONSTOP* ) nonstop=true ;;
esac
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD=$JAVA_HOME/jre/sh/java
else
JAVACMD=$JAVA_HOME/bin/java
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD=java
if ! command -v java >/dev/null 2>&1
then
die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
fi
# Increase the maximum file descriptors if we can.
if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
case $MAX_FD in #(
max*)
# In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
# shellcheck disable=SC2039,SC3045
MAX_FD=$( ulimit -H -n ) ||
warn "Could not query maximum file descriptor limit"
esac
case $MAX_FD in #(
'' | soft) :;; #(
*)
# In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
# shellcheck disable=SC2039,SC3045
ulimit -n "$MAX_FD" ||
warn "Could not set maximum file descriptor limit to $MAX_FD"
esac
fi
# Collect all arguments for the java command, stacking in reverse order:
# * args from the command line
# * the main class name
# * -classpath
# * -D...appname settings
# * --module-path (only if needed)
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
# For Cygwin or MSYS, switch paths to Windows format before running java
if "$cygwin" || "$msys" ; then
APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
JAVACMD=$( cygpath --unix "$JAVACMD" )
# Now convert the arguments - kludge to limit ourselves to /bin/sh
for arg do
if
case $arg in #(
-*) false ;; # don't mess with options #(
/?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
[ -e "$t" ] ;; #(
*) false ;;
esac
then
arg=$( cygpath --path --ignore --mixed "$arg" )
fi
# Roll the args list around exactly as many times as the number of
# args, so each arg winds up back in the position where it started, but
# possibly modified.
#
# NB: a `for` loop captures its iteration list before it begins, so
# changing the positional parameters here affects neither the number of
# iterations, nor the values presented in `arg`.
shift # remove old arg
set -- "$@" "$arg" # push replacement arg
done
fi
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Collect all arguments for the java command:
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
# and any embedded shellness will be escaped.
# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
# treated as '${Hostname}' itself on the command line.
set -- \
"-Dorg.gradle.appname=$APP_BASE_NAME" \
-jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
"$@"
# Stop when "xargs" is not available.
if ! command -v xargs >/dev/null 2>&1
then
die "xargs is not available"
fi
# Use "xargs" to parse quoted args.
#
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
#
# In Bash we could simply go:
#
# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
# set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any
# character that might be a shell metacharacter, then use eval to reverse
# that process (while maintaining the separation between arguments), and wrap
# the whole thing up as a single "set" statement.
#
# This will of course break if any of these variables contains a newline or
# an unmatched quote.
#
eval "set -- $(
printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
xargs -n1 |
sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
tr '\n' ' '
)" '"$@"'
exec "$JAVACMD" "$@"

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@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem You may obtain a copy of the License at
@rem
@rem https://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@rem SPDX-License-Identifier: Apache-2.0
@rem
@if "%DEBUG%"=="" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%"=="" set DIRNAME=.
@rem This is normally unused
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if %ERRORLEVEL% equ 0 goto execute
echo. 1>&2
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
echo. 1>&2
echo Please set the JAVA_HOME variable in your environment to match the 1>&2
echo location of your Java installation. 1>&2
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto execute
echo. 1>&2
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
echo. 1>&2
echo Please set the JAVA_HOME variable in your environment to match the 1>&2
echo location of your Java installation. 1>&2
goto fail
:execute
@rem Setup the command line
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
:end
@rem End local scope for the variables with windows NT shell
if %ERRORLEVEL% equ 0 goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
set EXIT_CODE=%ERRORLEVEL%
if %EXIT_CODE% equ 0 set EXIT_CODE=1
if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
exit /b %EXIT_CODE%
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

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buildscript {
repositories {
gradlePluginPortal()
}
dependencies {
classpath "io.github.fourlastor:construo:2.1.0"
if(enableGraalNative == 'true') {
classpath "org.graalvm.buildtools.native:org.graalvm.buildtools.native.gradle.plugin:0.9.28"
}
}
}
plugins {
id "application"
}
apply plugin: 'io.github.fourlastor.construo'
import io.github.fourlastor.construo.Target
sourceSets.main.resources.srcDirs += [ rootProject.file('assets').path ]
application.mainClass = 'io.github.eldek0.lwjgl3.Lwjgl3Launcher'
application.applicationName = appName
eclipse.project.name = appName + '-lwjgl3'
java.sourceCompatibility = 21
java.targetCompatibility = 21
if (JavaVersion.current().isJava9Compatible()) {
compileJava.options.release.set(21)
}
dependencies {
implementation "com.badlogicgames.gdx:gdx-backend-lwjgl3:$gdxVersion"
implementation "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-desktop"
implementation project(':core')
if(enableGraalNative == 'true') {
implementation "io.github.berstanio:gdx-svmhelper-backend-lwjgl3:$graalHelperVersion"
}
}
def os = System.properties['os.name'].toLowerCase(Locale.ROOT)
run {
workingDir = rootProject.file('assets').path
// You can uncomment the next line if your IDE claims a build failure even when the app closed properly.
//setIgnoreExitValue(true)
if (os.contains('mac')) jvmArgs += "-XstartOnFirstThread"
}
jar {
// sets the name of the .jar file this produces to the name of the game or app, with the version after.
archiveFileName.set("${appName}-${projectVersion}.jar")
// the duplicatesStrategy matters starting in Gradle 7.0; this setting works.
duplicatesStrategy = DuplicatesStrategy.EXCLUDE
dependsOn configurations.runtimeClasspath
from { configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) } }
// these "exclude" lines remove some unnecessary duplicate files in the output JAR.
exclude('META-INF/INDEX.LIST', 'META-INF/*.SF', 'META-INF/*.DSA', 'META-INF/*.RSA')
dependencies {
exclude('META-INF/INDEX.LIST', 'META-INF/maven/**')
}
// setting the manifest makes the JAR runnable.
// enabling native access helps avoid a warning when Java 24 or later runs the JAR.
// setting Multi-Release to true allows LWJGL3 to use different classes on recent Java versions.
manifest {
attributes 'Main-Class': application.mainClass, 'Enable-Native-Access': 'ALL-UNNAMED', 'Multi-Release': 'true'
}
// this last step may help on some OSes that need extra instruction to make runnable JARs.
doLast {
file(archiveFile).setExecutable(true, false)
}
}
// Builds a JAR that only includes the files needed to run on macOS, not Windows or Linux.
// The file size for a Mac-only JAR is about 7MB smaller than a cross-platform JAR.
tasks.register("jarMac") {
dependsOn("jar")
group("build")
jar.archiveFileName.set("${appName}-${projectVersion}-mac.jar")
jar.exclude("windows/x86/**", "windows/x64/**", "linux/arm32/**", "linux/arm64/**", "linux/x64/**", "**/*.dll", "**/*.so",
'META-INF/INDEX.LIST', 'META-INF/*.SF', 'META-INF/*.DSA', 'META-INF/*.RSA')
dependencies {
jar.exclude("windows/x86/**", "windows/x64/**", "linux/arm32/**", "linux/arm64/**", "linux/x64/**",
'META-INF/INDEX.LIST', 'META-INF/maven/**')
}
}
// Builds a JAR that only includes the files needed to run on Linux, not Windows or macOS.
// The file size for a Linux-only JAR is about 5MB smaller than a cross-platform JAR.
tasks.register("jarLinux") {
dependsOn("jar")
group("build")
jar.archiveFileName.set("${appName}-${projectVersion}-linux.jar")
jar.exclude("windows/x86/**", "windows/x64/**", "macos/arm64/**", "macos/x64/**", "**/*.dll", "**/*.dylib",
'META-INF/INDEX.LIST', 'META-INF/*.SF', 'META-INF/*.DSA', 'META-INF/*.RSA')
dependencies {
jar.exclude("windows/x86/**", "windows/x64/**", "macos/arm64/**", "macos/x64/**",
'META-INF/INDEX.LIST', 'META-INF/maven/**')
}
}
// Builds a JAR that only includes the files needed to run on Windows, not Linux or macOS.
// The file size for a Windows-only JAR is about 6MB smaller than a cross-platform JAR.
tasks.register("jarWin") {
dependsOn("jar")
group("build")
jar.archiveFileName.set("${appName}-${projectVersion}-win.jar")
jar.exclude("macos/arm64/**", "macos/x64/**", "linux/arm32/**", "linux/arm64/**", "linux/x64/**", "**/*.dylib", "**/*.so",
'META-INF/INDEX.LIST', 'META-INF/*.SF', 'META-INF/*.DSA', 'META-INF/*.RSA')
dependencies {
jar.exclude("macos/arm64/**", "macos/x64/**", "linux/arm32/**", "linux/arm64/**", "linux/x64/**",
'META-INF/INDEX.LIST', 'META-INF/maven/**')
}
}
construo {
// name of the executable
name.set(appName)
// human-readable name, used for example in the `.app` name for macOS
humanName.set(appName)
jlink {
guessModulesFromJar.set(false)
// You may need to add more modules, as needed.
modules.addAll("java.base", "java.management", "java.desktop", "jdk.unsupported")
}
targets.configure {
register("linuxX64", Target.Linux) {
architecture.set(Target.Architecture.X86_64)
jdkUrl.set("https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.10%2B7/OpenJDK21U-jdk_x64_linux_hotspot_21.0.10_7.tar.gz")
// Linux does not currently have a way to set the icon on the executable
}
register("macM1", Target.MacOs) {
architecture.set(Target.Architecture.AARCH64)
jdkUrl.set("https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.10%2B7/OpenJDK21U-jdk_aarch64_mac_hotspot_21.0.10_7.tar.gz")
// macOS needs an identifier
identifier.set("io.github.eldek0." + appName)
// Optional: icon for macOS, as an ICNS file
macIcon.set(project.file("icons/logo.icns"))
}
register("macX64", Target.MacOs) {
architecture.set(Target.Architecture.X86_64)
jdkUrl.set("https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.10%2B7/OpenJDK21U-jdk_x64_mac_hotspot_21.0.10_7.tar.gz")
// macOS needs an identifier
identifier.set("io.github.eldek0." + appName)
// Optional: icon for macOS, as an ICNS file
macIcon.set(project.file("icons/logo.icns"))
}
register("winX64", Target.Windows) {
architecture.set(Target.Architecture.X86_64)
// Optional: icon for Windows, as a PNG
icon.set(project.file("icons/logo.png"))
jdkUrl.set("https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.10%2B7/OpenJDK21U-jdk_x64_windows_hotspot_21.0.10_7.zip")
// Uncomment the next line to show a console when the game runs, to print messages.
//useConsole.set(true)
}
}
}
// Equivalent to the jar task; here for compatibility with gdx-setup.
tasks.register('dist') {
dependsOn 'jar'
}
distributions {
main {
contents {
into('libs') {
project.configurations.runtimeClasspath.files.findAll { file ->
file.getName() != project.tasks.jar.outputs.files.singleFile.name
}.each { file ->
exclude file.name
}
}
}
}
}
startScripts.dependsOn(':lwjgl3:jar')
startScripts.classpath = project.tasks.jar.outputs.files
if(enableGraalNative == 'true') {
apply from: file("nativeimage.gradle")
}

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project(":lwjgl3") {
apply plugin: "org.graalvm.buildtools.native"
graalvmNative {
binaries {
main {
imageName = appName
mainClass = application.mainClass
requiredVersion = '23.0'
buildArgs.add("-march=compatibility")
jvmArgs.addAll("-Dfile.encoding=UTF8")
sharedLibrary = false
resources.autodetect()
}
}
}
run {
doNotTrackState("Running the app should not be affected by Graal.")
}
// Modified from https://lyze.dev/2021/04/29/libGDX-Internal-Assets-List/ ; thanks again, Lyze!
// This creates a resource-config.json file based on the contents of the assets folder (and the libGDX icons).
// This file is used by Graal Native to embed those specific files.
// This has to run before nativeCompile, so it runs at the start of an unrelated resource-handling command.
generateResourcesConfigFile.doFirst {
def assetsFolder = new File("${project.rootDir}/assets/")
def lwjgl3 = project(':lwjgl3')
def resFolder = new File("${lwjgl3.projectDir}/src/main/resources/META-INF/native-image/${lwjgl3.ext.appName}")
resFolder.mkdirs()
def resFile = new File(resFolder, "resource-config.json")
resFile.delete()
resFile.append(
"""{
"resources":{
"includes":[
{
"pattern": ".*(""")
// This adds every filename in the assets/ folder to a pattern that adds those files as resources.
fileTree(assetsFolder).each {
// The backslash-Q and backslash-E escape the start and end of a literal string, respectively.
resFile.append("\\\\Q${it.name}\\\\E|")
}
// We also match all of the window icon images this way and the font files that are part of libGDX.
resFile.append(
"""libgdx.+\\\\.png|lsans.+)"
}
]},
"bundles":[]
}"""
)
}
}

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package io.github.eldek0.lwjgl3;
import com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application;
import com.badlogic.gdx.backends.lwjgl3.Lwjgl3ApplicationConfiguration;
import io.github.eldek0.Main;
/** Launches the desktop (LWJGL3) application. */
public class Lwjgl3Launcher {
public static void main(String[] args) {
if (StartupHelper.startNewJvmIfRequired()) return; // This handles macOS support and helps on Windows.
createApplication();
}
private static Lwjgl3Application createApplication() {
return new Lwjgl3Application(new Main(), getDefaultConfiguration());
}
private static Lwjgl3ApplicationConfiguration getDefaultConfiguration() {
Lwjgl3ApplicationConfiguration configuration = new Lwjgl3ApplicationConfiguration();
configuration.setTitle("multiplayer-kryonet");
//// Vsync limits the frames per second to what your hardware can display, and helps eliminate
//// screen tearing. This setting doesn't always work on Linux, so the line after is a safeguard.
configuration.useVsync(true);
//// Limits FPS to the refresh rate of the currently active monitor, plus 1 to try to match fractional
//// refresh rates. The Vsync setting above should limit the actual FPS to match the monitor.
configuration.setForegroundFPS(Lwjgl3ApplicationConfiguration.getDisplayMode().refreshRate + 1);
//// If you remove the above line and set Vsync to false, you can get unlimited FPS, which can be
//// useful for testing performance, but can also be very stressful to some hardware.
//// You may also need to configure GPU drivers to fully disable Vsync; this can cause screen tearing.
configuration.setWindowedMode(640, 480);
//// You can change these files; they are in lwjgl3/src/main/resources/ .
//// They can also be loaded from the root of assets/ .
configuration.setWindowIcon("libgdx128.png", "libgdx64.png", "libgdx32.png", "libgdx16.png");
//// This could improve compatibility with Windows machines with buggy OpenGL drivers, Macs
//// with Apple Silicon that have to emulate compatibility with OpenGL anyway, and more.
//// This uses the dependency `com.badlogicgames.gdx:gdx-lwjgl3-angle` to function.
//// You would need to add this line to lwjgl3/build.gradle , below the dependency on `gdx-backend-lwjgl3`:
//// implementation "com.badlogicgames.gdx:gdx-lwjgl3-angle:$gdxVersion"
//// You can choose to add the following line and the mentioned dependency if you want; they
//// are not intended for games that use GL30 (which is compatibility with OpenGL ES 3.0).
//// Know that it might not work well in some cases.
// configuration.setOpenGLEmulation(Lwjgl3ApplicationConfiguration.GLEmulation.ANGLE_GLES20, 0, 0);
return configuration;
}
}

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/*
* Copyright 2020 damios
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Note, the above license and copyright applies to this file only.
package io.github.eldek0.lwjgl3;
import com.badlogic.gdx.Version;
import com.badlogic.gdx.backends.lwjgl3.Lwjgl3NativesLoader;
import org.lwjgl.system.JNI;
import org.lwjgl.system.linux.UNISTD;
import org.lwjgl.system.macosx.LibC;
import org.lwjgl.system.macosx.ObjCRuntime;
import java.io.File;
import java.lang.management.ManagementFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
/**
* A helper object for game startup, featuring three utilities related to LWJGL3 on various operating systems.
* <p>
* The utilities are as follows:
* <ul>
* <li> Windows: Prevents a common crash related to LWJGL3's extraction of shared library files.</li>
* <li> macOS: Spawns a child JVM process with {@code -XstartOnFirstThread} in the JVM args (if it was not already).
* This is required for LWJGL3 to work on macOS.</li>
* <li> Linux (NVIDIA GPUs only): Spawns a child JVM process with the {@code __GL_THREADED_OPTIMIZATIONS}
* {@link System#getenv(String) Environment Variable} set to {@code 0} (if it was not already). This is required for
* LWJGL3 to work on Linux with NVIDIA GPUs.</li>
* </ul>
* <a href="https://jvm-gaming.org/t/starting-jvm-on-mac-with-xstartonfirstthread-programmatically/57547">Based on this java-gaming.org post by kappa</a>
* @author damios
*/
public class StartupHelper {
private StartupHelper() {}
private static final String JVM_RESTARTED_ARG = "jvmIsRestarted";
/**
* Must only be called on Linux. Check OS first (or use short-circuit evaluation)!
* @return whether NVIDIA drivers are present on Linux.
*/
public static boolean isLinuxNvidia() {
String[] drivers = new File("/proc/driver").list(
(dir, path) -> path.toUpperCase(Locale.ROOT).contains("NVIDIA")
);
if (drivers == null) return false;
return drivers.length > 0;
}
/**
* Applies the utilities as described by {@link StartupHelper}'s Javadoc.
* <p>
* All {@link System#getenv() Environment Variables} are copied to the child JVM process (if it is spawned), as
* specified by {@link ProcessBuilder#environment()}; the same applies for
* {@link System#getProperties() System Properties}.
* <p>
* <b>Usage:</b>
* <pre><code>
* public static void main(String[] args) {
* if (StartupHelper.startNewJvmIfRequired()) return;
* // ... The rest of main() goes here, as normal.
* }
* </code></pre>
* @return whether a child JVM process was spawned or not.
*/
public static boolean startNewJvmIfRequired() {
return startNewJvmIfRequired(true);
}
/**
* Applies the utilities as described by {@link StartupHelper}'s Javadoc.
* <p>
* All {@link System#getenv() Environment Variables} are copied to the child JVM process (if it is spawned), as
* specified by {@link ProcessBuilder#environment()}; the same applies for
* {@link System#getProperties() System Properties}.
* <p>
* <b>Usage:</b>
* <pre><code>
* public static void main(String[] args) {
* // The parameter on the next line could instead be false if you don't want to inherit IO.
* if (StartupHelper.startNewJvmIfRequired(true)) return;
* // ... The rest of main() goes here, as normal.
* }
* </code></pre>
* @param inheritIO whether I/O should be inherited in the child JVM process. Please note that enabling this will
* block the thread until the child JVM process stops executing.
* @return whether a child JVM process was spawned or not.
*/
public static boolean startNewJvmIfRequired(boolean inheritIO) {
String osName = System.getProperty("os.name").toLowerCase(Locale.ROOT);
if (osName.contains("mac")) return startNewJvm0(/*isMac =*/ true, inheritIO);
if (osName.contains("windows")) {
// Here, we are trying to work around an issue with how LWJGL3 loads its extracted .dll files.
// By default, LWJGL3 extracts to the directory specified by "java.io.tmpdir": usually, the user's home.
// If the user's name has non-ASCII (or some non-alphanumeric) characters in it, that would fail.
// By extracting to the relevant "ProgramData" folder, which is usually "C:\ProgramData", we avoid this.
// We also temporarily change the "user.name" property to one without any chars that would be invalid.
// We revert our changes immediately after loading LWJGL3 natives.
String programData = System.getenv("ProgramData");
if (programData == null) programData = "C:\\Temp"; // if ProgramData isn't set, try some fallback.
String prevTmpDir = System.getProperty("java.io.tmpdir", programData);
String prevUser = System.getProperty("user.name", "libGDX_User");
System.setProperty("java.io.tmpdir", programData + "\\libGDX-temp");
System.setProperty(
"user.name",
("User_" + prevUser.hashCode() + "_GDX" + Version.VERSION).replace('.', '_')
);
Lwjgl3NativesLoader.load();
System.setProperty("java.io.tmpdir", prevTmpDir);
System.setProperty("user.name", prevUser);
return false;
}
return startNewJvm0(/*isMac =*/ false, inheritIO);
}
private static final String MAC_JRE_ERR_MSG = "A Java installation could not be found. If you are distributing this app with a bundled JRE, be sure to set the '-XstartOnFirstThread' argument manually!";
private static final String LINUX_JRE_ERR_MSG = "A Java installation could not be found. If you are distributing this app with a bundled JRE, be sure to set the environment variable '__GL_THREADED_OPTIMIZATIONS' to '0'!";
private static final String CHILD_LOOP_ERR_MSG = "The current JVM process is a spawned child JVM process, but StartupHelper has attempted to spawn another child JVM process! This is a broken state, and should not normally happen! Your game may crash or not function properly!";
/**
* Spawns a child JVM process if on macOS, or on Linux with NVIDIA drivers.
* <p>
* All {@link System#getenv() Environment Variables} are copied to the child JVM process (if it is spawned), as
* specified by {@link ProcessBuilder#environment()}; the same applies for
* {@link System#getProperties() System Properties}.
* @param isMac whether the current OS is macOS. If this is `false` then the current OS is assumed to be Linux (and
* an immediate check for NVIDIA drivers is performed).
* @param inheritIO whether I/O should be inherited in the child JVM process. Please note that enabling this will
* block the thread until the child JVM process stops executing.
* @return whether a child JVM process was spawned or not.
*/
public static boolean startNewJvm0(boolean isMac, boolean inheritIO) {
long processID = getProcessID(isMac);
if (!isMac) {
// No need to restart non-NVIDIA Linux
if (!isLinuxNvidia()) return false;
// check whether __GL_THREADED_OPTIMIZATIONS is already disabled
if ("0".equals(System.getenv("__GL_THREADED_OPTIMIZATIONS"))) return false;
} else {
// There is no need for -XstartOnFirstThread on Graal native image
if (!System.getProperty("org.graalvm.nativeimage.imagecode", "").isEmpty()) return false;
// Checks if we are already on the main thread, such as from running via Construo.
long objcMsgSend = ObjCRuntime.getLibrary().getFunctionAddress("objc_msgSend");
long nsThread = ObjCRuntime.objc_getClass("NSThread");
long currentThread = JNI.invokePPP(nsThread, ObjCRuntime.sel_getUid("currentThread"), objcMsgSend);
boolean isMainThread = JNI.invokePPZ(currentThread, ObjCRuntime.sel_getUid("isMainThread"), objcMsgSend);
if (isMainThread) return false;
if ("1".equals(System.getenv("JAVA_STARTED_ON_FIRST_THREAD_" + processID))) return false;
}
// Check whether this JVM process is a child JVM process already.
// This state shouldn't usually be reachable, but this stops us from endlessly spawning new child JVM processes.
if ("true".equals(System.getProperty(JVM_RESTARTED_ARG))) {
System.err.println(CHILD_LOOP_ERR_MSG);
return false;
}
// Spawn the child JVM process with updated environment variables or JVM args
List<String> jvmArgs = new ArrayList<>();
// The following line is used assuming you target Java 8, the minimum for LWJGL3.
String javaExecPath = System.getProperty("java.home") + "/bin/java";
// If targeting Java 9 or higher, you could use the following instead of the above line:
//String javaExecPath = ProcessHandle.current().info().command().orElseThrow()
if (!(new File(javaExecPath).exists())) {
System.err.println(getJreErrMsg(isMac));
return false;
}
jvmArgs.add(javaExecPath);
if (isMac) jvmArgs.add("-XstartOnFirstThread");
jvmArgs.add("-D" + JVM_RESTARTED_ARG + "=true");
jvmArgs.addAll(ManagementFactory.getRuntimeMXBean().getInputArguments());
jvmArgs.add("-cp");
jvmArgs.add(System.getProperty("java.class.path"));
String mainClass = System.getenv("JAVA_MAIN_CLASS_" + processID);
if (mainClass == null) {
StackTraceElement[] trace = Thread.currentThread().getStackTrace();
if (trace.length > 0) mainClass = trace[trace.length - 1].getClassName();
else {
System.err.println("The main class could not be determined.");
return false;
}
}
jvmArgs.add(mainClass);
try {
ProcessBuilder processBuilder = new ProcessBuilder(jvmArgs);
if (!isMac) processBuilder.environment().put("__GL_THREADED_OPTIMIZATIONS", "0");
if (!inheritIO) processBuilder.start();
else processBuilder.inheritIO().start().waitFor();
} catch (Exception e) {
System.err.println("There was a problem restarting the JVM.");
// noinspection CallToPrintStackTrace
e.printStackTrace();
}
return true;
}
private static String getJreErrMsg(boolean isMac) {
if (isMac) return MAC_JRE_ERR_MSG;
else return LINUX_JRE_ERR_MSG;
}
private static long getProcessID(boolean isMac) {
if (isMac) return LibC.getpid();
else return UNISTD.getpid();
}
}

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29
server/build.gradle Normal file
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plugins {
id 'java'
id 'application'
}
group = 'io.github.eldek0'
version = "$projectVersion"
repositories {
mavenCentral()
mavenLocal()
maven { url = 'https://jitpack.io' }
}
dependencies {
implementation project(':shared')
testImplementation platform('org.junit:junit-bom:5.10.0')
testImplementation 'org.junit.jupiter:junit-jupiter'
testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
}
application {
mainClass = 'io.github.eldek0.GameServer'
}
tasks.test {
useJUnitPlatform()
}

103
server/src/main/java/io/github/eldek0/GameServer.java Normal file
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package io.github.eldek0;
import com.esotericsoftware.kryonet.Connection;
import com.esotericsoftware.kryonet.Listener;
import com.esotericsoftware.kryonet.Server;
import io.github.eldek0.network.Network;
import io.github.eldek0.network.NetworkPackets;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class GameServer {
private final Server server;
private final Map<Integer, NetworkPackets.PlayerState> players = new ConcurrentHashMap<>();
public GameServer() {
server = new Server();
Network.register(server);
server.addListener(new Listener() {
@Override
public void connected(Connection connection) {
System.out.println("Cliente conectado: " + connection.getID());
}
@Override
public void disconnected(Connection connection) {
int id = connection.getID();
players.remove(id);
NetworkPackets.PlayerDisconnected packet = new NetworkPackets.PlayerDisconnected();
packet.id = id;
server.sendToAllTCP(packet);
System.out.println("Cliente desconectado: " + id);
}
@Override
public void received(Connection connection, Object object) {
if (object instanceof NetworkPackets.Login login) {
handleLogin(connection, login);
}
if (object instanceof NetworkPackets.PlayerMove move) {
handleMove(connection, move);
}
}
});
}
private void handleLogin(Connection connection, NetworkPackets.Login login) {
NetworkPackets.PlayerState player = new NetworkPackets.PlayerState();
player.id = connection.getID();
player.name = login.name;
player.x = 100;
player.y = 100;
players.put(player.id, player);
NetworkPackets.PlayerConnected joined = new NetworkPackets.PlayerConnected();
joined.id = player.id;
joined.name = player.name;
joined.x = player.x;
joined.y = player.y;
server.sendToAllTCP(joined);
sendFullState(connection);
}
private void handleMove(Connection connection, NetworkPackets.PlayerMove move) {
NetworkPackets.PlayerState player = players.get(connection.getID());
if (player == null) return;
player.x = move.x;
player.y = move.y;
NetworkPackets.PlayerMove update = new NetworkPackets.PlayerMove();
update.id = player.id;
update.x = player.x;
update.y = player.y;
server.sendToAllUDP(update);
}
private void sendFullState(Connection connection) {
NetworkPackets.WorldState worldState = new NetworkPackets.WorldState();
worldState.players.addAll(players.values());
connection.sendTCP(worldState);
}
public void start() throws IOException {
server.start();
server.bind(Network.TCP_PORT, Network.UDP_PORT);
System.out.println("Servidor iniciado.");
}
public static void main(String[] args) throws IOException {
new GameServer().start();
}
}

11
settings.gradle Normal file
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plugins {
// Applies the foojay-resolver plugin to allow automatic download of JDKs.
id("org.gradle.toolchains.foojay-resolver-convention") version "1.0.0"
}
// A list of which subprojects to load as part of the same larger project.
// You can remove Strings from the list and reload the Gradle project
// if you want to temporarily disable a subproject.
include 'lwjgl3', 'core'
include 'server'
include 'shared'

16
shared/build.gradle Normal file
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plugins {
id 'java-library'
}
group = 'io.github.eldek0'
version = "$projectVersion"
repositories {
mavenCentral()
mavenLocal()
maven { url = 'https://jitpack.io' }
}
dependencies {
api "com.github.crykn:kryonet:$kryoNetVersion"
}

17
shared/src/main/java/io/github/eldek0/Main.java Normal file
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package io.github.eldek0;
//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
public class Main {
public static void main(String[] args) {
//TIP Press <shortcut actionId="ShowIntentionActions"/> with your caret at the highlighted text
// to see how IntelliJ IDEA suggests fixing it.
System.out.printf("Hello and welcome!");
for (int i = 1; i <= 5; i++) {
//TIP Press <shortcut actionId="Debug"/> to start debugging your code. We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
// for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
System.out.println("i = " + i);
}
}
}

23
shared/src/main/java/io/github/eldek0/network/Network.java Normal file
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package io.github.eldek0.network;
import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryonet.EndPoint;
import java.util.ArrayList;
public class Network {
public static final int TCP_PORT = 54555;
public static final int UDP_PORT = 54777;
public static void register(EndPoint endPoint) {
Kryo kryo = endPoint.getKryo();
kryo.register(NetworkPackets.Login.class);
kryo.register(NetworkPackets.PlayerConnected.class);
kryo.register(NetworkPackets.PlayerDisconnected.class);
kryo.register(NetworkPackets.PlayerMove.class);
kryo.register(NetworkPackets.WorldState.class);
kryo.register(NetworkPackets.PlayerState.class);
kryo.register(ArrayList.class);
}
}

36
shared/src/main/java/io/github/eldek0/network/NetworkPackets.java Normal file
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package io.github.eldek0.network;
public class NetworkPackets {
public static class Login {
public String name;
}
public static class PlayerConnected {
public int id;
public String name;
public float x;
public float y;
}
public static class PlayerDisconnected {
public int id;
}
public static class PlayerMove {
public int id;
public float x;
public float y;
}
public static class WorldState {
public java.util.ArrayList<PlayerState> players = new java.util.ArrayList<>();
}
public static class PlayerState {
public int id;
public String name;
public float x;
public float y;
}
}