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, norm):
  22     if norm:
  23         r = abs(random.normalvariate(0.0,0.5*r))
  24     else:
  25         r = random.uniform(0.0,r)
  26     a = random.uniform(0.0,2*math.pi)
  27     x += math.cos(a)*r
  28     y += math.sin(a)*r
  29     return [x, y]
  30
  31 class RadiusRandomize(inkex.Effect):
  32     def __init__(self):
  33         inkex.Effect.__init__(self)
  34         self.OptionParser.add_option("-r", "--radius",
  35                         action="store", type="float",
  36                         dest="radius", default=10.0,
  37                         help="Randomly move control and end points in this radius")
  38         self.OptionParser.add_option("-c", "--ctrl",
  39                         action="store", type="inkbool",
  40                         dest="ctrl", default=True,
  41                         help="Randomize control points")
  42         self.OptionParser.add_option("-e", "--end",
  43                         action="store", type="inkbool",
  44                         dest="end", default=True,
  45                         help="Randomize nodes")
  46         self.OptionParser.add_option("-n", "--norm",
  47                         action="store", type="inkbool",
  48                         dest="norm", default=True,
  49                         help="Use normal distribution")
  50     def effect(self):
  51         for id, node in self.selected.iteritems():
  52             if node.tagName == 'path':
  53                 d = node.attributes.getNamedItem('d')
  54                 p = cubicsuperpath.parsePath(d.value)
  55                 for subpath in p:
  56                     for csp in subpath:
  57                         if self.options.end:
  58                             delta=randomize([0,0], self.options.radius, self.options.norm)
  59                             csp[0][0]+=delta[0]
  60                             csp[0][1]+=delta[1]
  61                             csp[1][0]+=delta[0]
  62                             csp[1][1]+=delta[1]
  63                             csp[2][0]+=delta[0]
  64                             csp[2][1]+=delta[1]
  65                         if self.options.ctrl:
  66                             csp[0]=randomize(csp[0], self.options.radius, self.options.norm)
  67                             csp[2]=randomize(csp[2], self.options.radius, self.options.norm)
  68                 d.value = cubicsuperpath.formatPath(p)
  69
  70 e = RadiusRandomize()
  71 e.affect()
  72