Wireworld

wireworld.rb

#!/usr/bin/env ruby
a=[
'                        ',
'  ......-+              ',
' .        ......        ',
'  ...+-...      .       ',
'               ....     ',
'               .  ..... ',
'               ....     ',
'  -+......      .       ',
' .        ......        ',
'  ...+-...              ',
'                        '
].map{|e|e.chars.to_a}

H,T,W,N='+','-','.',' '

def load_png(file)
  require 'chunky_png'
  i=ChunkyPNG::Image.from_file(file)
  a=Array.new(i.height){''}
  i.height.times{|y|i.width.times{|x|
    a[y] << case i[x,y]
            when ChunkyPNG::Color.rgb(0xFF,0xFF,0xFF) then W
            when ChunkyPNG::Color.rgb(0xFF,0x00,0x00) then H
            when ChunkyPNG::Color.rgb(0x00,0x00,0xFF) then T
            else N
            end
  }}
  a.map{|e|e.chars.to_a}
end

#a = load_png('7segw.png')

s=a[0].size
w={}.tap{|w|a.each_with_index{|r,y|r.each_with_index{|c,x|w[y*s+x]=c if c!=N}}}
while 1
  x=w.dup
  w.each{|k,c|x[k]=c==H ? T : c==T ? W : (n=[k-s-1,k-s,k-s+1,k-1,k+1,k+s-1,k+s,k+s+1].count{|e|w[e]==H}) && n>0 && n<3 ? H : c}
  w=x
  o=''
  a.size.times{|i|s.times{|j|o<<(w[i*s+j]||N)};o<<"\n"}
  system 'clear'
  print o
  sleep 0.05
end