Listing Libraries and their urls

wget http://download.processing.org/contribs/contribs.txt

NB toxiclibs, pbox2d, joonsrenderer, wordcram and geomerative libraries are available as rubygems, further the libraries in the contributed list only contains libraries curated (filtered) by Prisoner John, there are many more that are available out there eg Joshua Davis hype.

An example library listing in contribs.txt:-

library
minRevision=228
name=gicentreUtils
maxRevision=0
sentence=Assists creation of data visualization sketches.
url=http://www.gicentre.org/utils/
prettyVersion=3.4.0
paragraph=Includes color utilities, statistical graphics, morphing classes, spatial utilities and map projections, force-directed layouts and text input/output. Together these make the task of creating data visualization sketches much faster by providing code for commonly repeated tasks such as zooming in and out of a sketch, setting up color tables etc. For documentation and examples, see the [gicentreUtils pages](http://www.gicentre.org/utils/).
version=14
authors=[Jo Wood](http://gicentre.org/) and [Aidan Slingsby](http://gicentre.org/)
download=http://staff.city.ac.uk/~jwo/giCentre/utils/gicentreUtils.zip
type=library
id=004

Installing a library

Install libraries to your ~/.propane/libraries folder. NB: this created for you when you install the video or sound libraries.

propane -i Sound
propane -i Video

It can make sense to convert the library names and jars from camelcase to snakecase, (ie when library creators have messed up) you just need to be consistent, see below

cd ~/.propane/libraries
wget http://staff.city.ac.uk/~jwo/giCentre/utils/gicentreUtils.zip
unzip gicentreUtils.zip # NB: British English spelling of centre
mv gicentreUtils gicenter_utils # Use snake case, and convert spelling
cd gicenter_utils/library
mv gicentreUtils.jar gicenter_utils.jar

Here is an example sketch translated to propane, main differences are how we load libraries and access package namespace in propane. Also note the use of the data_path wrapper to access sketch data folder. Another twist is the need to cast array of ruby Numbers to java float.

require 'propane'
# Sketch to demonstrate the use of the BarChart class to draw simple bar charts.
# Version 1.3, 6th February, 2016.
# Author Jo Wood, giCentre.
class BarChartSketch < Propane::App
  load_library :gicenter_utils
  include_package 'org.gicentre.utils.stat' # British spelling

  def settings
    size(800, 300)
    smooth
  end

  def setup # a static sketch no need for draw loop
    sketch_title 'Bar Chart Sketch'
    title_font = load_font(data_path('Helvetica-22.vlw'))
    small_font = load_font(data_path('Helvetica-12.vlw'))
    text_font(small_font)
    bar_chart = BarChart.new(self)
    data_float = [
      2_462, 2_801, 3_280, 3_983, 4_490, 4_894, 5_642, 6_322, 6_489, 6_401,
      7_657, 9_649, 9_767, 12_167, 15_154, 18_200, 23_124, 28_645, 39_471
    ]
    bar_chart.setData(data_float.to_java(:float))
    data_label = %w(1830 1840 1850 1860 1870 1880 1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010)
    bar_chart.setBarLabels(data_label)
    bar_chart.setBarColour(color(200, 80, 80, 100))
    bar_chart.setBarGap(2)
    bar_chart.setValueFormat('$###,###')
    bar_chart.showValueAxis(true)
    bar_chart.showCategoryAxis(true)
    background(255)
    bar_chart.draw(10, 10, width - 20, height - 20)
    fill(120)
    text_font(title_font)
    text('Income per person, United Kingdom', 70, 30)
    text_height = text_ascent # of title font
    text_font(small_font)
    text('Gross domestic product measured in inflation-corrected $US', 70, 30 + text_height)
  end
end

BarChartSketch.new

bar chart sketch