DLA

A Ruby library implementing Diffusion-Limited Aggregation.

• Produces simple text file fully describing final render
• Keeps full tree, not just cell positions
• Keeps building history

• Demo app
• Move "Save .dla" to library
• Display saved .dla file
• Upscale
• Binary .dla format
• Load state from .dla file
• Height map
• Export bitmap
• Make history optional
• Multithreading
• Make Demo app human-friendly
• Make direction vectors configurable

Install the gem and add to the application's Gemfile by executing:

$ bundle add dla

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install dla

Default arguments are fine (1280x720 bounds)

Let it run for a while:

require 'dla'
root = DLA::Node.root
n = DLA::Node.new root:
loop do
  n.move
  if n.parent # Node has found another node
    n = DLA::Node.new root:
  end
  break if bored
end

Inspect state:

root.nodes.each{|n| puts n}

The history string is made of the letters n, s, e, w to describe the directions followed during the calls to #move. NOTE: The Y axis is oriented to the North.

A quick and dirty demo app is in ./bin/dla.rb.

Because Rubygems are not supposed to be used to distribute apps, you'll need to run the app from the project directory after running bundle install in order to satisfy the requirement of my fork of TTY:Box.

After checking out the repo, run bundle exec bin/setup to install dependencies. Then, run bundle exec rake spec to run the tests. You can also run bundle exec bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/ameuret/dla. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

The gem is available as open source under the terms of the Unlicense

Everyone interacting in the DLA project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.