img2gcode.rb

require 'pathname'
require 'rubygems'
require "RMagick"
include Magick 

EXTENSION = '.DNC' #出力ファイルの拡張子
CANVAS_WIDTH = 297000 #板の横幅
CANVAS_HEIGHT = 210000 #板の縦幅
GROUND_ZERO = -200 #基準の高さ(板の表面のZ)
MAX_DEPTH = 500 #基準の高さから掘る最大の深さ
CEILING_HEIGHT = 1500 #板からドリルを離すときの基準の高さからの距離
DRILL_RADIUS = 1000 #ドリルの半径
MAX_BRIGHTNESS = 65535
#PPM = 0.005 #pixcel per micro mater 1micro materあたりのピクセル数
PPM = 0.0065 #pixcel per micro mater 1micro materあたりのピクセル数
PIXCEL_WIDTH = (1 / PPM).to_i
NULL_DEPTH = 9999

def milli2micro(mil)
  return mil * 1000
end
def micro2milli(micro)
  return (mil / 1000).to_i
end
def getBrightness(pixel)
  return [pixel.red, pixel.green, pixel.blue].max
end
def getDepth(brightness)
  return (GROUND_ZERO - MAX_DEPTH.to_f * (brightness.to_f / MAX_BRIGHTNESS.to_f)).to_i
end
def printZ(depth)
  puts "Z" + depth.to_s + "\r\n"
end
def printMaxSpeed()
  puts "G01 Z1000 F10000000" + "\r\n"
end
def printNormalSpeed()
  puts "G01 Z1000 F100000" + "\r\n"
end
def printXY(x,y)
  puts "X" + x.to_s + " Y" + y.to_s + "\r\n"
end
def printHeader
  puts "G90" + "\r\n"
  puts "G28" + "\r\n"
  puts "G01 Z1000 F100000" + "\r\n"
  puts "M03" + "\r\n"
  puts "M00" + "\r\n"
end
def printFooter
  puts "Z1000 F999" + "\r\n"
  puts "M05" + "\r\n"
  puts "G28" + "\r\n"
  puts "M30" + "\r\n"
end
def printCR
  printZ(CEILING_HEIGHT)
end
def printDnc(curDepth, prevDepth, prev_x, prev_y, cur_x, cur_y)
  if curDepth < prevDepth then
    printXY(cur_x, cur_y)
    printZ(curDepth)
  elsif curDepth == prevDepth then
  else
    printXY(prev_x, prev_y)
    printZ(curDepth)
    printXY(cur_x, cur_y)
  end
end

filename = ARGV[0] #inputファイル名
#outputfilename = Pathname(filename).sub_ext(EXTENSION).to_s
img = ImageList.new(filename)

printHeader()
depthMap = Array.new
for y in 0...img.rows
  depthRow = Array.new
  for x in 0...img.columns
    pixel = img.pixel_color(x, y)
    depth = getDepth(getBrightness(pixel))
    depthRow << depth
    #if depth < -1000 then
      #print "0"
    #else
      #print "1"
    #end
  end
  #p ";"
  depthMap << depthRow
end

curpos_x = -PIXCEL_WIDTH
curpos_y = 0
prevDepth = NULL_DEPTH 
depthMap.each{|row|
  row.each{|depth|
    printDnc(depth, prevDepth, curpos_x - PIXCEL_WIDTH, curpos_y, curpos_x, curpos_y)
    prevDepth = depth
    curpos_x += PIXCEL_WIDTH
  }
  printXY(curpos_x,curpos_y)
  curpos_x = -PIXCEL_WIDTH
  curpos_y += PIXCEL_WIDTH
  prevDepth = NULL_DEPTH
  printCR()
  printMaxSpeed()
  printXY(curpos_x,curpos_y)
  printNormalSpeed()
}

printFooter()