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Python Source  |  2006-09-06  |  2.8 KB  |  66 lines
  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, inkex, cubicsuperpath
  20.  
  21. class Whirl(inkex.Effect):
  22.     def __init__(self):
  23.         inkex.Effect.__init__(self)
  24.         self.OptionParser.add_option("-x", "--centerx",
  25.                         action="store", type="float", 
  26.                         dest="centerx", default=10.0,
  27.                         help="")
  28.         self.OptionParser.add_option("-y", "--centery",
  29.                         action="store", type="float", 
  30.                         dest="centery", default=0.0,
  31.                         help="")
  32.         self.OptionParser.add_option("-t", "--whirl",
  33.                         action="store", type="float", 
  34.                         dest="whirl", default=1.0,
  35.                         help="amount of whirl")
  36.         self.OptionParser.add_option("-r", "--rotation",
  37.                         action="store", type="inkbool", 
  38.                         dest="rotation", default=True,
  39.                         help="direction of rotation")
  40.     def effect(self):
  41.         for id, node in self.selected.iteritems():
  42.             rotation = -1
  43.             if self.options.rotation == True:
  44.                 rotation = 1
  45.             whirl = self.options.whirl / 1000
  46.             if node.tagName == 'path':
  47.                 d = node.attributes.getNamedItem('d')
  48.                 p = cubicsuperpath.parsePath(d.value)
  49.                 for sub in p:
  50.                     for csp in sub:
  51.                         for point in csp:
  52.                             point[0] -= self.options.centerx
  53.                             point[1] -= self.options.centery
  54.                             dist = math.sqrt((point[0] ** 2) + (point[1] ** 2))
  55.                             if dist != 0:
  56.                                 a = rotation * dist * whirl
  57.                                 theta = math.atan2(point[1], point[0]) + a
  58.                                 point[0] = (dist * math.cos(theta))
  59.                                 point[1] = (dist * math.sin(theta))
  60.                             point[0] += self.options.centerx
  61.                             point[1] += self.options.centery
  62.                 d.value = cubicsuperpath.formatPath(p)
  63.  
  64. e = Whirl()
  65. e.affect()
  66.