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kochify_load.py

#!/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 math, tempfile, cPickle, inkex, simplepath

def findend(d):
      end = []
      subPathStart = []
      for cmd,params in d:
            if cmd == 'M':
                  subPathStart = params[-2:]
            if cmd == 'Z':
                  end = subPathStart[:]
            else:
                  end = params[-2:]
      return end

class LoadKochify(inkex.Effect):
      def effect(self):
            for id, node in self.selected.iteritems():
                  if node.tagName == 'path':
                        d = simplepath.parsePath(node.attributes.getNamedItem('d').value)
                        start = d[0][1][-2:]
                        end = findend(d)
                        while start == end and len(d):
                              d = d[:-1]
                              end = findend(d)
                        if not end: 
                              break
                        dx = end[0]-start[0]
                        dy = end[1]-start[1]
                        length = math.sqrt((dx**2) + (dy**2))
                        angle = math.atan2(dy,dx)
                        endsinz = False
                        if d[-1][0]=='Z':
                              endsinz = True
                        path = {'start': start, 'end': end, 'endsinz': endsinz,
                              'length': length, 'angle': angle, 'path': d}
                        f = open(tempfile.gettempdir() + '/kochify.bin', 'w')
                        cPickle.dump(path, f)
                        f.close()                     
                        break

e = LoadKochify()
e.affect()

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