Loading Libraries

Like ruby-processing, there is a load_library utility, that can be used to load processing libraries or pure ruby libraries (or a mixture thereof when java libraries are called by the ruby library). Libraries need to have unique names and are called in this order:-

1. local ruby library library/grammar.rb called using load_library :grammar

2. local java library library/video/{jars} one or more jars including those in lib sub-folder

3. installed java library {libraries}/library/video/{jars} one or more jars including those in lib sub-folder. In this case libraries defaults to ~/.jruby_art/libraries but could be configured in `~/.jruby_art/config.yml to point to wherever vanilla processing libraries are stored.

Usage

require 'jruby_art'

# Test your Webcam with this sketch
class TestCapture < Processing::App
  load_library :video
  include_package 'processing.video'
  attr_reader :cam

  def setup
    size(960, 544)
    cameras = Capture.list
    fail 'There are no cameras available for capture.' if (cameras.length == 0)
    p 'Matching cameras available:'
    size_pattern = Regexp.new(format('%dx%d', width, height))
    select = cameras.grep size_pattern # filter available cameras
    select.uniq.map { |cam| p cam.strip }
    fail 'There are no matching cameras.' if (select.length == 0)
    start_capture(select[0])
  end

  def start_capture(cam_string)
    # The camera can be initialized directly using an
    # element from the array returned by list:
    @cam = Capture.new(self, cam_string)
    p format('Using camera %s', cam_string)
    cam.start
  end

  def draw
    return unless cam.available
    cam.read
    image(cam, 0, 0)
    # The following does the same, and is faster when just drawing the image
    # without any additional resizing, transformations, or tint.
    # set(0, 0, cam)
  end
end

TestCapture.new(title: 'Test Capture')