Pi4J V2 :: Java I/O Library for Raspberry Pi :: Example game application with FXGL

This project contains an example application which uses the Pi4J (V2) library and uses an Arcade button and joystick kit to control a JavaFX FXGL game. Full description is available on the Pi4J website

PROJECT OVERVIEW

The goal of the example project is to show how to set up a Pi4J Maven for the Raspberry Pi with JavaFX and some physical buttons.

The full description is available on Game development with FXGL.

COMPONENTS

Connections as documented on pinout.xyz:

RUNTIME DEPENDENCIES

This project uses Pi4J V.2 which has the following runtime dependency requirements:

• SLF4J (API)
• SLF4J-SIMPLE

As this application has a JavaFX user interface, the project requires the OpenJFX runtime. When the package is build, then the runtime is downloaded and added to the distribution directory.

BUILD DEPENDENCIES & INSTRUCTIONS

This project can be built with Apache Maven 3.6 (or later) and Java 17 OpenJDK (or later). These prerequisites must be installed prior to building this project. The following command can be used to download all project dependencies and compile the Java module. You can build this project directly on a Raspberry Pi with Java 17+.

mvn clean package

Compiled application to run on the Raspberry Pi

Once the build is complete and was successful, you can find the compiled artifacts in the target folder. Specifically all dependency modules (JARs) and a simple run.sh bash script will be located in the target/distribution folder. This folder contains all the required files needed to distribute (copy) to your Raspberry Pi to run this project.

For your convenience, this distribution folder is zipped up, and is also located in the target/ folder. Copy this file to your Raspberry Pi, for example with the following command:

rsync target/pi4j-example-fxgl-0.0.1.zip pi@192.8.0.124:.

Then on the Raspberry Pi unzip the file with the following command:

unzip pi4j-example-fxgl-0.0.1.zip

Now the example can be started with the following command:

cd pi4j-example-fxgl-0.0.1/
./run.sh

Note: If you are using the native bindings running locally on the Raspberry Pi, then you may have to run the program using sudo to gain the necessary access permissions to the hardware I/O.

This is the list of files created by the build process of this example application:

• pi4j-core
• pi4j-example-fxgl
• pi4j-library-gpiod
• pi4j-plugin-gpiod
• pi4j-plugin-raspberrypi
• slf4j-api
• slf4j-simple
• javafx-*
• and additional dependencies required for JavaFX and FXGL
• run.sh --> this is the actual start file which will run pi4j-example-fxgl

LICENSE

Pi4J Version 2.0 and later is 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: http://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.