home *** CD-ROM | disk | FTP | other *** search
- #!/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()