share/extensions/kochify_load.py

   1 #!/usr/bin/env python
   2 '''
   3 Copyright (C) 2005 Aaron Spike, aaron@ekips.org
   4
   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.
   9
  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.
  14
  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
  18 '''
  19 import math, tempfile, cPickle, inkex, simplepath
  20
  21 def findend(d):
  22         end = []
  23         subPathStart = []
  24         for cmd,params in d:
  25                 if cmd == 'M':
  26                         subPathStart = params[-2:]
  27                 if cmd == 'Z':
  28                         end = subPathStart[:]
  29                 else:
  30                         end = params[-2:]
  31         return end
  32
  33 class LoadKochify(inkex.Effect):
  34         def effect(self):
  35                 for id, node in self.selected.iteritems():
  36                         if node.tagName == 'path':
  37                                 d = simplepath.parsePath(node.attributes.getNamedItem('d').value)
  38                                 start = d[0][1][-2:]
  39                                 end = findend(d)
  40                                 while start == end and len(d):
  41                                         d = d[:-1]
  42                                         end = findend(d)
  43                                 if not end:
  44                                         break
  45                                 dx = end[0]-start[0]
  46                                 dy = end[1]-start[1]
  47                                 length = math.sqrt((dx**2) + (dy**2))
  48                                 angle = math.atan2(dy,dx)
  49                                 endsinz = False
  50                                 if d[-1][0]=='Z':
  51                                         endsinz = True
  52                                 path = {'start': start, 'end': end, 'endsinz': endsinz,
  53                                         'length': length, 'angle': angle, 'path': d}
  54                                 f = open(tempfile.gettempdir() + '/kochify.bin', 'w')
  55                                 cPickle.dump(path, f)
  56                                 f.close()
  57                                 break
  58
  59 e = LoadKochify()
  60 e.affect()