svg2gcode/svg2gcode.py

#!/usr/bin/env python
import svg, sys
from gcode import Gcode
from optparse import OptionParser

parser = OptionParser()
parser.add_option("-f", "--file", dest="filename", default=None,
                  help="Load SVG file", metavar="FILE")
parser.add_option("-s", "--scale",
                  dest="scale", type="float", default=1.0,
                  help="set scale factor (default 1.0)")
parser.add_option("-e", "",
                  dest="engrave_speed", type="float", default=20,
                  help="engrave speed mm/sec (default 20)")
parser.add_option("-t", "",
                  dest="travel_speed", type="float", default=130,
                  help="travel speed mm/sec (default 130)")


(options, args) = parser.parse_args()


if not options.filename:
    print "no filename given!"
    sys.exit(1)

gcode = Gcode(scale=options.scale, travel_speed=options.travel_speed, engrave_speed=options.engrave_speed)

im = svg.parse(options.filename)
b1, b2 = im.bbox()
width, height = b2.coord()
print "Original dimension: %.2f x %.2f" % (width, height)
width *= gcode.mm_pixel * options.scale
height *= gcode.mm_pixel * options.scale
print "Print dimension: %.2fmm x %.2fmm" % (width, height)

def normalize(coord):
    x = coord[0]
    y = coord[1]
    # flip y
    y = (b2.coord()[1] - y)
    return (x, y)

data = im.flatten()
for d in data:
    if hasattr(d, "segments"):
        for l in d.segments(1):
            x, y = normalize(l[0].coord())
            gcode.move(x, y)
            for pt in l[1:]:
                x, y = normalize(pt.coord())
                gcode.engrave(x, y)

# write gcode file
gcode.write(options.filename + ".g")