b94d2b9b7786b33a0f65cdd6277705a0edced162
1 #!/usr/bin/env python
2 """
3 Copyright (C) 2005 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
19 """
20 import inkex, os, re, simplepath, cubicsuperpath
21 from ffgeom import *
23 uuconv = {'in':90.0, 'pt':1.25, 'px':1, 'mm':3.5433070866, 'cm':35.433070866, 'pc':15.0}
24 def unittouu(string):
25 unit = re.compile('(%s)$' % '|'.join(uuconv.keys()))
26 param = re.compile(r'(([-+]?[0-9]+(\.[0-9]*)?|[-+]?\.[0-9]+)([eE][-+]?[0-9]+)?)')
28 p = param.match(string)
29 u = unit.search(string)
30 if p:
31 retval = float(p.string[p.start():p.end()])
32 else:
33 retval = 0.0
34 if u:
35 try:
36 return retval * uuconv[u.string[u.start():u.end()]]
37 except KeyError:
38 pass
39 return retval
41 class Project(inkex.Effect):
42 def __init__(self):
43 inkex.Effect.__init__(self)
44 def effect(self):
45 if len(self.options.ids) < 2:
46 inkex.debug("Requires two selected paths. The second must be exctly four nodes long.")
47 exit()
49 #obj is selected second
50 obj = self.selected[self.options.ids[0]]
51 trafo = self.selected[self.options.ids[1]]
52 if obj.tagName == 'path' and trafo.tagName == 'path':
53 #distil trafo into four node points
54 trafo = cubicsuperpath.parsePath(trafo.attributes.getNamedItem('d').value)
55 trafo = [[Point(csp[1][0],csp[1][1]) for csp in subs] for subs in trafo][0][:4]
57 #vectors pointing away from the trafo origin
58 self.t1 = Segment(trafo[0],trafo[1])
59 self.t2 = Segment(trafo[1],trafo[2])
60 self.t3 = Segment(trafo[3],trafo[2])
61 self.t4 = Segment(trafo[0],trafo[3])
63 #query inkscape about the bounding box of obj
64 self.q = {'x':0,'y':0,'width':0,'height':0}
65 file = self.args[-1]
66 id = self.options.ids[0]
67 for query in self.q.keys():
68 f = os.popen("inkscape --query-%s --query-id=%s %s" % (query,id,file))
69 self.q[query] = float(f.read())
70 f.close()
71 #glean document height from the SVG
72 docheight = unittouu(inkex.xml.xpath.Evaluate('/svg/@height',self.document)[0].value)
73 #Flip inkscapes transposed renderer coords
74 self.q['y'] = docheight - self.q['y'] - self.q['height']
76 #process path
77 d = obj.attributes.getNamedItem('d')
78 p = cubicsuperpath.parsePath(d.value)
79 for subs in p:
80 for csp in subs:
81 csp[0] = self.trafopoint(csp[0])
82 csp[1] = self.trafopoint(csp[1])
83 csp[2] = self.trafopoint(csp[2])
84 d.value = cubicsuperpath.formatPath(p)
86 def trafopoint(self,(x,y)):
87 #Transform algorithm thanks to Jose Hevia (freon)
88 vector = Segment(Point(self.q['x'],self.q['y']),Point(x,y))
89 xratio = abs(vector.delta_x())/self.q['width']
90 yratio = abs(vector.delta_y())/self.q['height']
92 horz = Segment(self.t1.pointAtRatio(xratio),self.t3.pointAtRatio(xratio))
93 vert = Segment(self.t4.pointAtRatio(yratio),self.t2.pointAtRatio(yratio))
95 p = intersectSegments(vert,horz)
96 return [p['x'],p['y']]
98 e = Project()
99 e.affect()