1 #!/usr/bin/env python
2 '''
3 Copyright (C) 2005,2007 Aaron Spike, aaron@ekips.org
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 '''
19 import inkex, simplepath, cubicsuperpath
21 class MyEffect(inkex.Effect):
22 def __init__(self):
23 inkex.Effect.__init__(self)
24 self.dxf = ''
25 def output(self):
26 print self.dxf
27 def dxf_add(self, str):
28 self.dxf += str
29 def dxf_line(self,csp):
30 line = "\n0\nLINE\n8\n2\n62\n4\n10\n%f\n20\n%f\n30\n0\n11\n%f\n21\n%f\n31\n0" % (csp[0][0],csp[0][1],csp[1][0],csp[1][1])
31 self.dxf_add(line)
32 def dxf_spline(self,csp):
33 knots = 8
34 ctrls = 4
35 self.dxf_add("\n 0\nSPLINE\n 5\n43\n 8\n0\n 62\n256\n370\n-1\n 6\nByLayer")
36 self.dxf_add("\n100\nAcDbEntity\n100\nAcDbSpline\n 70\n8\n 71\n3\n 72\n%d\n 73\n%d\n 74\n0" % (knots, ctrls))
37 for i in range(2):
38 for j in range(4):
39 self.dxf_add("\n 40\n%d" % i)
40 for i in csp:
41 self.dxf_add("\n 10\n%f\n 20\n%f\n 30\n0" % (i[0],i[1]))
42 def effect(self):
43 #References: Minimum Requirements for Creating a DXF File of a 3D Model By Paul Bourke
44 # NURB Curves: A Guide for the Uninitiated By Philip J. Schneider
45 self.dxf_add("999\nDXF created by Inkscape\n0\nSECTION\n2\nENTITIES")\r
46 \r
47 scale = 25.4/90.0
48 h = inkex.unittouu(self.document.getroot().xpath('@height', namespaces=inkex.NSS)[0])\r
50 path = '//svg:path'
51 for node in self.document.getroot().xpath(path, namespaces=inkex.NSS):\r
52 d = node.get('d')\r
53 sim = simplepath.parsePath(d)\r
54 simplepath.scalePath(sim,scale,-scale)\r
55 simplepath.translatePath(sim,0,h*scale)
56 p = cubicsuperpath.CubicSuperPath(sim)
57 for sub in p:
58 for i in range(len(sub)-1):
59 s = sub[i]
60 e = sub[i+1]
61 if s[1] == s[2] and e[0] == e[1]:
62 self.dxf_line([s[1],e[1]])
63 else:
64 self.dxf_spline([s[1],s[2],e[0],e[1]])
65 self.dxf_add("\n0\nENDSEC\n0\nEOF\n")
68 e = MyEffect()
69 e.affect()