A simple demo of my scene gem

irb.rb

# gem install scene

require 'rubygems'
require 'scene'

class MyScene < Scene
  def display
    @count ||= 0
    @count += 1
    @count %= 200
    
    @colours = 30.times.map { [rand, rand, rand] } if @count == 1
    
    glBegin(GL_TRIANGLE_FAN)
    @colours.each do |colour|
      glColor3f(*colour)
      vertex = colour.map { |c| 2 * c - 1 }
      glVertex3f(*vertex)
    end
    glEnd
  end
end