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#!/usr/bin/env python
"""
Copyright (C) 2005 Aaron Spike, aaron@ekips.org
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
"""
# standard library
import os
# local library
import cubicsuperpath
import inkex
import simplepath
import simpletransform
import voronoi2svg
from ffgeom import *
inkex.localize()
try:
from subprocess import Popen, PIPE
bsubprocess = True
except:
bsubprocess = False
class Project(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
def effect(self):
if len(self.options.ids) < 2:
inkex.errormsg(_("This extension requires two selected paths. \nThe second path must be exactly four nodes long."))
exit()
#obj is selected second
scale = self.unittouu('1px') # convert to document units
obj = self.selected[self.options.ids[0]]
trafo = self.selected[self.options.ids[1]]
if obj.get(inkex.addNS('type','sodipodi')):
inkex.errormsg(_("The first selected object is of type '%s'.\nTry using the procedure Path->Object to Path." % obj.get(inkex.addNS('type','sodipodi'))))
exit()
if obj.tag == inkex.addNS('path','svg') or obj.tag == inkex.addNS('g','svg'):
if trafo.tag == inkex.addNS('path','svg'):
#distil trafo into four node points
mat = simpletransform.composeParents(trafo, [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]])
trafo = cubicsuperpath.parsePath(trafo.get('d'))
if len(trafo[0]) < 4:
inkex.errormsg(_("This extension requires that the second selected path be four nodes long."))
exit()
simpletransform.applyTransformToPath(mat, trafo)
trafo = [[Point(csp[1][0],csp[1][1]) for csp in subs] for subs in trafo][0][:4]
#vectors pointing away from the trafo origin
self.t1 = Segment(trafo[0],trafo[1])
self.t2 = Segment(trafo[1],trafo[2])
self.t3 = Segment(trafo[3],trafo[2])
self.t4 = Segment(trafo[0],trafo[3])
#query inkscape about the bounding box of obj
self.q = {'x':0,'y':0,'width':0,'height':0}
file = self.args[-1]
id = self.options.ids[0]
for query in self.q.keys():
if bsubprocess:
p = Popen('inkscape --query-%s --query-id=%s "%s"' % (query,id,file), shell=True, stdout=PIPE, stderr=PIPE)
rc = p.wait()
self.q[query] = scale*float(p.stdout.read())
err = p.stderr.read()
else:
f,err = os.popen3('inkscape --query-%s --query-id=%s "%s"' % (query,id,file))[1:]
self.q[query] = scale*float(f.read())
f.close()
err.close()
if obj.tag == inkex.addNS("path",'svg'):
self.process_path(obj)
if obj.tag == inkex.addNS("g",'svg'):
self.process_group(obj)
else:
if trafo.tag == inkex.addNS('g','svg'):
inkex.errormsg(_("The second selected object is a group, not a path.\nTry using the procedure Object->Ungroup."))
else:
inkex.errormsg(_("The second selected object is not a path.\nTry using the procedure Path->Object to Path."))
exit()
else:
inkex.errormsg(_("The first selected object is not a path.\nTry using the procedure Path->Object to Path."))
exit()
def process_group(self,group):
for node in group:
if node.tag == inkex.addNS('path','svg'):
self.process_path(node)
if node.tag == inkex.addNS('g','svg'):
self.process_group(node)
def process_path(self,path):
mat = simpletransform.composeParents(path, [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]])
d = path.get('d')
p = cubicsuperpath.parsePath(d)
simpletransform.applyTransformToPath(mat, p)
for subs in p:
for csp in subs:
csp[0] = self.trafopoint(csp[0])
csp[1] = self.trafopoint(csp[1])
csp[2] = self.trafopoint(csp[2])
mat = voronoi2svg.Voronoi2svg().invertTransform(mat)
simpletransform.applyTransformToPath(mat, p)
path.set('d',cubicsuperpath.formatPath(p))
def trafopoint(self,(x,y)):
#Transform algorithm thanks to Jose Hevia (freon)
vector = Segment(Point(self.q['x'],self.q['y']),Point(x,y))
xratio = abs(vector.delta_x())/self.q['width']
yratio = abs(vector.delta_y())/self.q['height']
horz = Segment(self.t1.pointAtRatio(xratio),self.t3.pointAtRatio(xratio))
vert = Segment(self.t4.pointAtRatio(yratio),self.t2.pointAtRatio(yratio))
p = intersectSegments(vert,horz)
return [p['x'],p['y']]
if __name__ == '__main__':
e = Project()
e.affect()
# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
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