ROFLBALT Background

gistfile1.rb

class Background
  PALETTE = [ 16, 232, 233 ]
  PERIOD = 16.0
  SPEED = 0.5
  BLOCKINESS = 10.0
  def initialize world
    @world = world
  end
  def pixel x, y, char = " "
    Pixel.new char, 0, color(x, y)
  end
  def color x, y
    y = (y / BLOCKINESS).round * BLOCKINESS
    sin = Math.sin((x + @world.distance.to_f * SPEED) / PERIOD + y / PERIOD)
    PALETTE[(0.9 * sin + 0.9).round]
  end
end