KiCad eeschema sine wave symbol generator

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#!/usr/bin/ruby
# Generates a 'sine wave' KiCad schematic symbol, for annotation

print("Amplitude (mils)? ")
amp = gets.to_i

print("Period (mils)? ")
per = gets.to_i

print("Number of cycles? ")
cycles = gets.to_i

print("Number of segments? ")
segs = gets.to_i

print("Component name? ")
name = gets.strip

puts (%(#
# #{name}
#
DEF ~#{name} #SYM 0 40 Y Y 1 F N
F0 "#SYM" 0 0 60 H I C CNN
F1 "#{name}" 0 0 60 H I C CNN
F2 "" 0 0 60 H V C CNN
F3 "" 0 0 60 H V C CNN
DRAW))

start_x = -per * (cycles / 2)
seg_delta = (per * cycles) / segs

(0..segs).each do |nseg|
  seg_x_start = start_x + (seg_delta * nseg)
  seg_x_end = seg_x_start + seg_delta

  seg_y_start = amp * Math::sin(seg_x_start * 2.0 * Math::PI / per)
  seg_y_end = amp * Math::sin(seg_x_end * 2.0 * Math::PI / per)

  puts "P 2 0 1 10  #{seg_x_start.to_i} #{seg_y_start.to_i}  #{seg_x_end.to_i} #{seg_y_end.to_i}"
end

puts("ENDDRAW\nENDDEF")