Source code for http://low-sugar-eye-candy.tumblr.com/post/169354251468/line-girl

line_girl.rb

W = 500
H = 585
W1 = W - 1
H1 = H - 1

def setup
  @img = load_image '../scratch/girl.png'
  @img.filter BLUR, 3
  @img.load_pixels
end

def draw
  b = color('#36465d')
  w = color(255)
  load_pixels
  max = 2000
  m = Hash.new((frame_count % 32) * (max / 32.0))
  i = 0
  0.upto(H1) { |y|
    0.upto(W1) { |x|
      c = @img.pixels[i]
      m[y] += brightness(c)
      if m[y] > max
        pixels[i] = w
        m[y] -= max / 2
      else
        pixels[i] = b
      end
      i += 1
    }
  }
  update_pixels
end

def settings
  size W, H, JAVA2D
  smooth
end