Ulaminate

Ulam spirals are neat. ulaminate can generate them.

$ gem install ulaminate

$ ulaminate --help
Usage: ulaminate [options]
    -h, --help                       Prints this help
        --size SIZE                  The size of the side of the spiral

Generate a 200-pixel square, black-on-white, Ulam spiral PNG in the current directory:

$ ulaminate --size 200
ulam_spiral_200.png

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run 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 tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/alexcruice/ulaminate.

The gem is available as open source under the terms of the MIT License.