passheights.rb

#!/usr/bin/ruby

$bottom = { "solid" => 1.0, "grass/farm" => 0.9375, "soul/8snow/chest" => 0.875, "endframe/chorus" => 0.8125, "enchant/7snow/" => 0.75, "6snow/sideendrod" => 0.625,
  "bed" => 0.5625, "slab/5snow/cake" => 0.5, "boat" => 0.5625, "4snow/daysensor" => 0.375, "3snow" => 0.25, "trapdoor" => 0.1875, "2snow/repeater" => 0.125,
  "lillypad" => 0.09375, "carpet" => 0.0625, "minecart" => 0.7}

$top = { "solid" => 1.0, "toptrapdoor" => 0.1875 }

$heights = {}

for blocks in 2..4
  $bottom.each do |bot,bv|
    $top.each do |top,tv|
      h = blocks
      h -= bv
      h -= tv
      if !$heights.include?(h)
        $heights[h] = []
      end

      name = bot
      if blocks > 2
        name += ",#{blocks-2}air"
      end
      name += ",#{top}"

      $heights[h] << name
    end
  end
end

$dens = [16, 32, 10]

$heights.sort_by(&:first).each do |k,v|
  best_num = nil
  best_den = nil
  best_dif = 1.0/0.0

  $dens.each do |den|
    num = (k * den).round.to_i
    k2 = num.to_f / den.to_f
    dif = (k - k2).abs
    if (dif < best_dif)
      best_dif = dif
      best_den = den
      best_num = num
    end
  end

  str = sprintf("%7.5f = %3d/%2d = %d+%2d/%2d: ", k, best_num, best_den, best_num / best_den, best_num % best_den, best_den)
  len = str.length
  print(str)

  # printf("%7.5f:", k*32)
  first = true
  v.each do |i|
    print (" "*len) if !first
    puts " #{i}"
    first = false
  end
  puts
end