Cleanup packaging

.github/workflows/package.yml

@@ -26,8 +26,7 @@ jobs:
           cp target/j3-*.jar staging/J3/lib
           cp -r data/ staging/J3/data
           cp -r animations staging/J3/animations
-          cp package/README.md staging/J3
-          cp package/win/j3.bat staging/J3
+          cp package/* staging/J3
           
       - name: Upload
         uses: actions/upload-artifact@v4

package/README.md

@@ -1,14 +1,14 @@
 # J3 - 3D Interactive Visualization in Java
 
-## Usage
-
-### Prerequisites
+## Prerequisites
 
 1. Download and install Java 17+
 2. Download and install JavaFX SDK - https://gluonhq.com/products/javafx/
 3. Set the environment variables `JAVA_HOME` and `JAVAFX_HOME`
 
-### Launch App
+## Usage
+
+Either use the provided `j3` command to run the application or launch from the terminals with:
 
 ```bash
 

package/j3

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+if [ -z "${JAVAFX_HOME}" ]; then
+    echo "JAVAFX_HOME environment variable must be set!"
+    exit -1
+fi
+
+java --module-path ${JAVAFX_HOME}\lib --add-modules javafx.controls --class-path "lib/*" j3.GUI

package/win/j3.bat → package/j3.bat

@@ -1,3 +1,5 @@
 @echo off
 
+if not defined JAVAFX_HOME echo JAVAFX_HOME environment variable must be set!
+
 java --module-path %JAVAFX_HOME%\lib --add-modules javafx.controls --class-path "lib/*" j3.GUI