Propane

A slim layer to communicate with Processing from JRuby, features a polyglot maven build. We have created a configuration free version of ruby processing, for processing-3.3, where we include processing core (from a local maven repository and opengl etc from maven central). These jars are small enough to include in a gem distribution, and hence we do not require configuration. This has created a scriptable version, ie files get run direct from jruby, but you could use jruby-complete if you used the propane script (avoids need to give the absolute data path for the data folder, but would also be needed for a watch mode). See guide to building ruby-processing projects.

Requirements

• jdk8+
• jruby-9.1.7.0+
• mvn-3.3.1+ (development only)
• core.jar processing-3.3.0 (development only until processing.org is available at maven central)

Building and testing

rake
rake gem
rake javadoc

Installation

jgem install propane # from rubygems 
jgem install propane-2.3.0-java.gem # for local install

Usage

require 'propane'

class FlashingLightsSketch < Propane::App

  def settings
    size(800, 600)
  end

  def setup
    sketch_title 'Flashing Light Sketch'
  end

  def draw
    background(rand(255), rand(255), rand(255))
  end
end

FlashingLightsSketch.new

To install the samples. The samples get copied to ~/propane_samples. Depends on wget.

propane --install samples

There is a handy sketch creator tool

propane -c my_sketch 200 200 # for default renderer
propane -c my_sketch 200 200 p2d # for opengl 2D renderer
propane -c my_sketch 200 200 p3d # for opengl 3D renderer

To run sketches

jruby -S propane --run my_sketch.rb # belt and braces version

To install the sound and video libraries ~/.propane/libraries. Depends on wget.

propane --install sound
propane --install video

Other java libraries can be manually installed to the same folder (no need for processing ide)