# Called as
# $ ruby image_generator.rb _width_ [_height_ [_num_zeroes_ [_max_num_]]]
# height defaults to width
# max_num defaults to 9

require 'optparse'

w = ARGV[0].to_i
h = w
max = 999999
zeroes = 1
if ARGV.length > 1
  h = ARGV[1].to_i
  if ARGV.length > 2
    zeroes = ARGV[2].to_i
    if ARGV.length > 3
      max = ARGV[3].to_i
    end
  end
end


def dist(a,b)
  #a.zip(b).map {|l| (l[0]-l[1]).abs}.max
  a.zip(b).map {|l| (l[0]-l[1]).abs}.reduce &:+
end

prng = Random.new

img = []

z_pos = []

zeroes.times do |i|
  z_pos.push [prng.rand(w), prng.rand(h)]
end

h.times do |y|
  img.push([])
  w.times do |x|
    img[y][x] = z_pos.map {|z| [max,(dist z,[x,y])].min}.min
  end
  line = img[y].map(&:to_s).join ' '
  puts line
end