#!/usr/bin/env python
#
# img2dxf.py
# (C)BA  Neil Gershenfeld
# convert a bitmap image to a 3D DXF surface
#
DATE = "4/27/03"

from Tkinter import *
from string import *
import Image

#
# window size
#
WIDTH = 500
HEIGHT = 500
#
# machine horizontal size and units scale factor
#
SIZE = 10
SCALE = 1000
#
# default cutting force and speed
#
force = 150
vel = 40

path = []
ipath = []
xoff = 0
yoff = 0
scale = 1

def read(event):
	global path
	#
	# read in DXF file
	#
	#text = infile.get()
	#img = Image.open(text)
	#print image
	photo = PhotoImage(file="j.gif")
	#item = c.create_image(100,100,anchor=NW,image=photo)
	item = Image.create_image(100,100,anchor=NW,image=photo)
	item.pack()

def plot(event):
	#
	# scale and plot path
	#
	scale = float(sscale.get())*WIDTH/SIZE
	xoff = float(sxoff.get())*WIDTH/SIZE
	yoff = float(syoff.get())*HEIGHT/SIZE
	if (path != []):
		c.delete("path")
		for i in range(len(path)/4):
			x0 = int(path[4*i]*scale + xoff)
			y0 = HEIGHT - int(path[4*i+1]*scale + yoff)
			x1 = int(path[4*i+2]*scale + xoff)
			y1 = HEIGHT - int(path[4*i+3]*scale + yoff)
			c.create_line(x0,y0,x1,y1,tag="path")

def write(event):
	#
	# write CAMM file
	#
	text = outfile.get()
	file = open(text, 'w')
	file.write("PA;PA;!ST1;!FS"+sforce.get()+";VS"+svel.get()+";")
	x1 = y1 = -1e10
	scale = float(sscale.get())
	xoff = float(sxoff.get())
	yoff = float(syoff.get())
	for i in range(len(path)/4):
		x0 = int(SCALE*(path[4*i]*scale + xoff))
		y0 = int(SCALE*(path[4*i+1]*scale + yoff))
		if ((x0 != x1) & (y0 != y1)):
			file.write("PU"+str(x0)+","+str(y0)+";")
		x1 = int(SCALE*(path[4*i+2]*scale + xoff))
		y1 = int(SCALE*(path[4*i+3]*scale + yoff))
		file.write("PD"+str(x1)+","+str(y1)+";")
	file.write("PU0,0;")
	file.close()
	c.delete("path")

root = Tk()
root.title('img2dxf')

inframe = Frame(root)
infile = StringVar()
Label(inframe, text="input image file: ").pack(side="left")
winfile = Entry(inframe, width=20, textvariable=infile)
winfile.pack(side="left")
winfile.bind('<Return>',read)
inframe.pack()

coordframe = Frame(root)
sxoff = StringVar()
sxoff.set(str(xoff))
syoff = StringVar()
syoff.set(str(yoff))
sscale = StringVar()
sscale.set(str(scale))
Label(coordframe, text="x offset:").pack(side="left")
wxoff = Entry(coordframe, width=10, textvariable=sxoff)
wxoff.pack(side="left")
wxoff.bind('<Return>',plot)
Label(coordframe, text="y offset:").pack(side="left")
wyoff = Entry(coordframe, width=10, textvariable=syoff)
wyoff.pack(side="left")
wyoff.bind('<Return>',plot)
Label(coordframe, text="scale factor:").pack(side="left")
wscale = Entry(coordframe, width=10, textvariable=sscale)
wscale.pack(side="left")
wscale.bind('<Return>',plot)
coordframe.pack()

c = Canvas(root, width=WIDTH, height=HEIGHT, background='white')
c.pack()

outframe = Frame(root)
outfile = StringVar()
outfile.set('out.camm')
Label(outframe, text="output CAMM file: ").pack(side="left")
woutfile = Entry(outframe, width=20, textvariable=outfile)
woutfile.pack(side="left")
woutfile.bind('<Return>',write)
Label(outframe, text="force: ").pack(side="left")
sforce = StringVar()
sforce.set(str(force))
Entry(outframe, width=10, textvariable=sforce).pack(side="left")
Label(outframe, text="velocity:").pack(side="left")
svel = StringVar()
svel.set(str(vel))
Entry(outframe, width=10, textvariable=svel).pack(side="left")
outframe.pack()

botframe = Frame(root)
Button(botframe, text="quit", command='exit').pack(side="left")
Label(botframe, text="   img2dxf "+DATE).pack(side="right")
botframe.pack()

root.mainloop()