A script to parse polhemus liberty motion data output. The script separates a single file containing data from 2 stations into separate files.

input.txt

1    20.465  -16.439   -4.668   65.601   -6.760 -144.382 1853586 0x75d90b  0 
2    21.251  -26.413   -5.341  172.982   25.081 -151.184 1853586 0x75d90b  0 

parser.rb

#!/usr/bin/env ruby
 
require 'rubygems'
 
class String
  def convert_base(from, to)
    self.to_i(from).to_s(to)
  end
end
 
orig = ARGV[0]
 
# station 1 Left
file_left = File.new("#{orig}_left", 'w+')
 
# station 2 Right
file_right = File.new("#{orig}_right", 'w+')
 
if orig.nil?
  exit
end
 
File.open(orig).each do |line|
  items = line.split(' ')
 
  if items.length > 1
    items[-2] = items[-2].convert_base(16,10)
 
    if items[0].to_i == 1
      items[0] = "0#{items[0]}"
      file_left.write(items.join(' '))
      file_left.write("\n")
    elsif items[0].to_i == 2
      items[0] = "01" 
      file_right.write(items.join(' '))
      file_right.write("\n")
    end
  end
end