share/extensions/radiusrand.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 random, math, inkex, cubicsuperpath
  20
  21 def randomize((x, y), r):
  22         r = random.uniform(0.0,r)
  23         a = random.uniform(0.0,2*math.pi)
  24         x += math.cos(a)*r
  25         y += math.sin(a)*r
  26         return [x, y]
  27
  28 class RadiusRandomize(inkex.Effect):
  29         def __init__(self):
  30                 inkex.Effect.__init__(self)
  31                 self.OptionParser.add_option("-r", "--radius",
  32                                                 action="store", type="float",
  33                                                 dest="radius", default=10.0,
  34                                                 help="Randomly move control and end points in this radius")
  35                 self.OptionParser.add_option("-c", "--ctrl",
  36                                                 action="store", type="inkbool",
  37                                                 dest="ctrl", default=True,
  38                                                 help="Randomize control points")
  39                 self.OptionParser.add_option("-e", "--end",
  40                                                 action="store", type="inkbool",
  41                                                 dest="end", default=True,
  42                                                 help="Randomize nodes")
  43         def effect(self):
  44                 for id, node in self.selected.iteritems():
  45                         if node.tagName == 'path':
  46                                 d = node.attributes.getNamedItem('d')
  47                                 p = cubicsuperpath.parsePath(d.value)
  48                                 for subpath in p:
  49                                         for csp in subpath:
  50                                                 if self.options.end:
  51                                                         delta=randomize([0,0], self.options.radius)
  52                                                         csp[0][0]+=delta[0]
  53                                                         csp[0][1]+=delta[1]
  54                                                         csp[1][0]+=delta[0]
  55                                                         csp[1][1]+=delta[1]
  56                                                         csp[2][0]+=delta[0]
  57                                                         csp[2][1]+=delta[1]
  58                                                 if self.options.ctrl:
  59                                                         csp[0]=randomize(csp[0], self.options.radius)
  60                                                         csp[2]=randomize(csp[2], self.options.radius)
  61                                 d.value = cubicsuperpath.formatPath(p)
  62
  63 e = RadiusRandomize()
  64 e.affect()
  65