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PiCrate

Version for Raspberry Pi OS on raspberryPI 3B+ works with jdk11 (reflective access warnings fixed for jdk11). That also works on 64 bit ManjaroArm distro on RaspberryPI4. Create processing sketches in ruby on raspberry-pi and linux (this project is a parallel development of propane targetting the raspberry-pi, but will initially be developed on a regular linux box). The aim is to produce a gem installable app that can be run with jruby, with minimal dependencies. Drop the C and you get pirate, or and an e and get PiCreate, a happy coincidence?

To install from rubygems

jgem install picrate

To Build and Test

Clone main branch:-

Requires java to build (and jogl-2.4.0-rc jars), but uses a maven wrapper so you don't need to install maven. Suggest build/test on regular linux box, but is designed for use on both RaspberryPI 3B+ and RaspberryPI4. Needs installed jruby to test/run.

cd PiCrate # or whatever you call it
rake # assumes an installed version of vanilla processing
jgem install picrate-2.5.2-java.gem

To create a template sketch:-

picrate -c my_sketch 200 200

Edit sketch (vim is a good choice, but we recommend geany) :-

#!/usr/bin/env jruby
# frozen_string_literal: false
require 'picrate'

class MySketch < Processing::App
  def settings
    size 200, 200
  end

  def setup
    sketch_title 'My Sketch'
  end

  def draw
    background 0
    fill 0, 0, 200
    ellipse 100, 100, 90, 70
  end
end

MySketch.new

Run Sketch

jruby --dev my_sketch.rb # --dev flag speeds start-up