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