Jay McGavren’s Journal

Our in-progress game for Android phones, where you move a character around and dig trenches for lava to flow through. Surprisingly easy work once you have the SDK installed and configured. Works great on both an emulator and the hardware.

We have the character movement and grid of dirt squares going. Artwork is, um, a placeholder. :)

If your code base has .xsl files, and you sometimes confuse them with with the .xls files… You might be a Java dev.

Got Ruby-Processing working with external libraries, so I can finally try it out with Ruby On Acid! My problem was that I couldn’t (or didn’t know how to) set the ruby load path with ruby-processing’s included “rp5″ tool. But on Marc Chung’s advice, I tried loading it into vanilla JRuby (had to do a small hack, but it worked). From there I was able to set $RUBYLIB, include it from a gem, whatever.

It’s fast, too, at least compared to wxRuby on MRI 1.8.7. My dual-core MacBook can draw 3000 shapes a second without breaking a sweat.

OK, so here’s how to try it out yourself:

Save to acid_sketch.rb:

require 'rubygems'
require 'ruby-processing'
require 'rubyonacid/factories/meta'
require 'rubyonacid/factories/combination'
require 'rubyonacid/factories/constant'
require 'rubyonacid/factories/flash'
require 'rubyonacid/factories/loop'
require 'rubyonacid/factories/random'
require 'rubyonacid/factories/repeat'
require 'rubyonacid/factories/sine'
require 'rubyonacid/factories/skip'

class Sketch < Processing::App

  def setup
    @f = create_factory
    @resetter = RubyOnAcid::SkipFactory.new(0.9999)
    background 0
    smooth
    ellipse_mode CENTER
    rect_mode CENTER
  end
  def draw
    10.times do
      fill(
        @f.get(:red, :max => 255),
        @f.get(:green, :max => 255),
        @f.get(:blue, :max => 255),
        @f.get(:alpha, :max => 255)
      )
      no_stroke
      ellipse(
        @f.get(:x, :max => width),
        @f.get(:y, :max => height),
        @f.get(:width, :max => 100),
        @f.get(:height, :max => 100)
      )
      @f.reset_assignments if @resetter.boolean(:reset)
    end
  end

  def create_factory

    random_factory = RubyOnAcid::RandomFactory.new

    source_factories = []
    #Loop factories loop from 0.0 to 1.0 (or 1.0 to 0.0 if the increment value is negative).
    source_factories << RubyOnAcid::LoopFactory.new(0.01)
    source_factories << RubyOnAcid::LoopFactory.new(-0.01)
    source_factories << RubyOnAcid::LoopFactory.new(0.001)
    source_factories << RubyOnAcid::LoopFactory.new(-0.001)
    #Constant factories always return the same value,
    source_factories << RubyOnAcid::ConstantFactory.new(rand)
    source_factories << RubyOnAcid::ConstantFactory.new(rand)
    source_factories << RubyOnAcid::FlashFactory.new(rand(100))
    #Sine factories produce a "wave" pattern.
    source_factories << RubyOnAcid::SineFactory.new(0.1)
    source_factories << RubyOnAcid::SineFactory.new(-0.1)
    source_factories << RubyOnAcid::SineFactory.new(0.01)
    source_factories << RubyOnAcid::SineFactory.new(-0.01)
    #A RepeatFactory wraps another factory, queries it, and repeats the same value a certain number of times.
    source_factories << RubyOnAcid::RepeatFactory.new(
      RubyOnAcid::LoopFactory.new(random_factory.within(:increment, -0.1, 0.1)),
      random_factory.get(:interval, :min => 2, :max => 100)
    )
    source_factories << RubyOnAcid::RepeatFactory.new(
      RubyOnAcid::SineFactory.new(random_factory.within(:increment, -0.1, 0.1)),
      random_factory.get(:interval, :min => 2, :max => 100)
    )
    #A CombinationFactory combines the values of two or more other factories.
    combination_factory = RubyOnAcid::CombinationFactory.new
    2.times do
      combination_factory.source_factories << source_factories[rand(source_factories.length)]
    end
    source_factories << combination_factory

    #The MetaFactory pulls requested value types from the other factories.
    meta_factory = RubyOnAcid::MetaFactory.new
    meta_factory.factory_pool = source_factories

    meta_factory

  end
end

Processing::SKETCH_PATH = ""

Sketch.new :title => “Ruby On Acid”, :width => 800, :height => 600, :full_screen => false

jay@dandelion:~/Projects/ruby-processing
$ sudo jruby -S gem install ruby-processing
jay@dandelion:~/Projects/ruby-processing
$ sudo jruby -S gem install rubyonacid
jay@dandelion:~/Projects/ruby-processing
$ jruby acid_sketch.rb