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Python Source  |  2010-03-12  |  2.5 KB  |  62 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("-t", "--whirl",
  25.                         action="store", type="float", 
  26.                         dest="whirl", default=1.0,
  27.                         help="amount of whirl")
  28.         self.OptionParser.add_option("-r", "--rotation",
  29.                         action="store", type="inkbool", 
  30.                         dest="rotation", default=True,
  31.                         help="direction of rotation")
  32.     def effect(self):
  33.         for id, node in self.selected.iteritems():
  34.             rotation = -1
  35.             if self.options.rotation == True:
  36.                 rotation = 1
  37.             whirl = self.options.whirl / 1000
  38.             if node.tag == inkex.addNS('path','svg'):
  39.                 d = node.get('d')
  40.                 p = cubicsuperpath.parsePath(d)
  41.                 for sub in p:
  42.                     for csp in sub:
  43.                         for point in csp:
  44.                             point[0] -= self.view_center[0]
  45.                             point[1] -= self.view_center[1]
  46.                             dist = math.sqrt((point[0] ** 2) + (point[1] ** 2))
  47.                             if dist != 0:
  48.                                 a = rotation * dist * whirl
  49.                                 theta = math.atan2(point[1], point[0]) + a
  50.                                 point[0] = (dist * math.cos(theta))
  51.                                 point[1] = (dist * math.sin(theta))
  52.                             point[0] += self.view_center[0]
  53.                             point[1] += self.view_center[1]
  54.                 node.set('d',cubicsuperpath.formatPath(p))
  55.  
  56. if __name__ == '__main__':
  57.     e = Whirl()
  58.     e.affect()
  59.  
  60.  
  61. # vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 encoding=utf-8 textwidth=99
  62.