Waterfall One, the source of

waterfall1.rb

# Waterfall One
# http://low-sugar-eye-candy.tumblr.com/post/164374908068/waterfall-one
#
# requires jruby_art gem and Processing3 to run
# run with: k9 run --nojruby forest.rb

W = 500
H = 801

def setup
  noise_seed 4934
  @points = []
end

def draw
  sketch_title "frame #{frame_count}, #{frame_rate.to_i} fps"
  if frame_count == 1
    background color('#36465d')
  else
    fill color('#36465d'), 20
    no_stroke
    rect 0, 0, W, H
    filter BLUR, 1
  end

  f = 1 + sin(frame_count / 10.0)
  stroke 255
  50.step(W - 50, 5) { |x| @points << [x, 0] }
  @points.map! do |x, y|
    point x, y
    nx = noise(x / 100.0, y / 100.0, f) * 2 - 1
    ny = noise(y / 100.0, x / 100.0, 5 - f) * 10
    [x + nx, y + ny]
  end

  save_it4 220, TWO_PI * 20
end

def save_it3(min, max)
  if frame_count >= min && frame_count <= max
    save_frame "#{Dir.pwd}/filename-###.png"
    p saved: frame_count
  elsif frame_count > max
    exit
  end
end

def save_it4(start, amount)
  save_it3(start, start + amount)
end

def settings
  size W, H, JAVA2D
  smooth
end