Ebb

Time-based helpers for Ruby game dev

Ebb is built with DragonRuby in mind, and is presented in this repo within a demo DragonRuby game for now, although it should work fine outside of that context.

# main.rb (DragonRuby)

require 'lib/ebb.rb'

def tick(args)
  $e ||= Ebb.new
  $e.tick

  # Helpers yield to a block
  $e.blink do |on|
    args.outputs.labels << [10, 10, on ? 'on' : 'off']
  end

  # Or return a value
  args.outputs.labels << [10, 30, $e.blink ? 'on' : 'off']

  # See main.rb in this repo for more examples
end

How to use

• Require ebb.rb (copy it into your game, for instance, in lieu of other package management)

• Make an Ebb instance. You can do this however you need as long as the instance is shared across frames. The example above sets it as a global outside of the game's #tick method, but there are other ways.

• Call #tick on the Ebb instance once per frame.

• Call helpers like blink, wave, and delay. Each returns a value or yields it to a block.

Docs

Coming soon

More

• See ebb.rb for helper code
• See main.rb for more examples