text to colo

color_hash.rb

require 'digest/md5'

# def color_hash(str, opts={})
#   ranges = opts[:ranges] || [(64..190),(64..190),(64..190)]
#   factors = opts[:factors] || [1.0] * ranges.size
#   factors = [factors.to_f] * ranges.size unless factors.is_a?(Array)
#   str.bytes.reduce(ranges.each_with_index.map{|e,i| e.size/(i+1)}){ |s,e|
#     s.each_with_index.map{|x,i|(x*e)%ranges[i].size+ranges[i].first}
#   }.each_with_index.map{|e,i|
#     x = (e*factors[i]).to_i
#     "%02x" % [[x, 0].max, 255].min
#   }.join
# end

$vals = Hash.new(0)
def color_hash(s, opts={})
  edge_size = (opts[:edge_percent] || 0.4)
  bin_size = 255 * (opts[:bin_size_percent] || 0.033)
  p bin_size
  colors = opts[:colors] || 3
  Digest::MD5.digest(s).bytes[0...colors].map{|e|
    i = (((e / bin_size).to_i * bin_size.to_i) * (1.0 - edge_size * 2) + (255 * edge_size)).to_i
    $vals[i] += 1
    "%02x" % i
  }.join
end

x = 3001.times.map{|i| "<div style='background:##{color_hash(i.to_s)};'></div>"}.join
File.write('colors.html',"<style>div{width:25px;height:25px;display:inline-block;}</style>#{x}")
p Hash[$vals.sort_by{|k,v| k}]