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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
import inkex, os, re, simplepath, cubicsuperpath
from ffgeom import *
uuconv = {'in':90.0, 'pt':1.25, 'px':1, 'mm':3.5433070866, 'cm':35.433070866, 'pc':15.0}
def unittouu(string):
unit = re.compile('(%s)$' % '|'.join(uuconv.keys()))
param = re.compile(r'(([-+]?[0-9]+(\.[0-9]*)?|[-+]?\.[0-9]+)([eE][-+]?[0-9]+)?)')
p = param.match(string)
u = unit.search(string)
if p:
retval = float(p.string[p.start():p.end()])
else:
retval = 0.0
if u:
try:
return retval * uuconv[u.string[u.start():u.end()]]
except KeyError:
pass
return retval
class Project(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
def effect(self):
if len(self.options.ids) < 2:
inkex.debug("Requires two selected paths. The second must be exctly four nodes long.")
exit()
#obj is selected second
obj = self.selected[self.options.ids[0]]
trafo = self.selected[self.options.ids[1]]
if obj.tagName == 'path' and trafo.tagName == 'path':
#distil trafo into four node points
trafo = cubicsuperpath.parsePath(trafo.attributes.getNamedItem('d').value)
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():
f = os.popen("inkscape --query-%s --query-id=%s %s" % (query,id,file))
self.q[query] = float(f.read())
f.close()
#glean document height from the SVG
docheight = unittouu(inkex.xml.xpath.Evaluate('/svg/@height',self.document)[0].value)
#Flip inkscapes transposed renderer coords
self.q['y'] = docheight - self.q['y'] - self.q['height']
#process path
d = obj.attributes.getNamedItem('d')
p = cubicsuperpath.parsePath(d.value)
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])
d.value = 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']]
e = Project()
e.affect()
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