Rdmx: Ruby DMX512

Rdmx is a simple Ruby library for talking DMX512-A over serial ports (or USB ports that look like serial ports) and a DSL for easily animating the DMX fixtures.

Author: Ian Smith-Heisters

Installation

I haven't bothered to write a gemspec, so:

git submodule add git://github.com/heisters/rdmx.git vendor/rdmx

Features

• DMX: implementation of the DMX512-A protocol (write only)
• Universes: abstraction for universes of 512 channels, talked to over a DMX serial port
• Fixtures: abstraction for fixtures that use more than one channel each
• Animation: DSL for easily creating animations
• Layers: Another level of abstraction to facilitate blending of animations

Example

require 'vendor/rdmx/rdmx'

include Rdmx

class Led < Fixture
  self.channels = :red, :green, :blue
end

@universe = Universe.new('/dev/tty.usbserial-ENRVOTH6', Led => 50)

blink = Animation.new do
  frame.new do
    puts "blinking red and green, then green and blue"
    100.times do
      @u.first[0..-1] = 255, 255, 0; continue
      @u.first[0..-1] = 0, 120, 255; continue
    end
  end
end

fade = Animation.new do
  frame.new do
    puts "fading in blue"
    (0..255).over(10.seconds).each{|v|@u.first[0..-1] = 0, 0, v.to_f.round; continue}
  end
end

xfade = Animation.new do
  frame.new do
    puts "cross-fading red and blue"
    (255..0).over(10.seconds).each do |v|
      @u.first.fixtures.each{|f|f.red = v.to_f.round}
      continue
    end

  frame.new do
    (0..255).over(10.seconds).each do |v|
      @u.first.fixtures.each{|f|f.blue = v.to_f.round}
      continue
    end
  end
end

ll = Layers.new 2, @u.first
layers = Animation.new do
  frame.new do
    puts "foreground/background blending with green fading in"
    (0..255).over(10.seconds).each do |v|
      ll.first[0..-1] = 255, 0, 255
      ll.last[0..-1] = 255, v.to_f.round, 255
      ll.apply!
      continue
    end
  end
end

blink.go!
fade.go!
xfade.go!
layers.go!

License

Copyright (c) 2009, Ian Smith-Heisters

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.