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Python Source  |  2005-05-24  |  2.5 KB  |  70 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, simplepath, sys
  20.  
  21. def pointAtPercent((x1, y1), (x2, y2), percent):
  22.     percent /= 100.0
  23.     x = x1 + (percent * (x2 - x1))
  24.     y = y1 + (percent * (y2 - y1))
  25.     return [x,y]
  26.  
  27. class SegmentStraightener(inkex.Effect):
  28.     def __init__(self):
  29.         inkex.Effect.__init__(self)
  30.         self.OptionParser.add_option("-p", "--percent",
  31.                         action="store", type="float", 
  32.                         dest="percent", default=10.0,
  33.                         help="move curve handles PERCENT percent closer to a straight line")
  34.         self.OptionParser.add_option("-b", "--behavior",
  35.                         action="store", type="int", 
  36.                         dest="behave", default=1,
  37.                         help="straightening behavior for cubic segments")
  38.     def effect(self):
  39.         for id, node in self.selected.iteritems():
  40.             if node.tagName == 'path':
  41.                 d = node.attributes.getNamedItem('d')
  42.                 p = simplepath.parsePath(d.value)
  43.                 last = []
  44.                 subPathStart = []
  45.                 for cmd,params in p:
  46.                     if cmd == 'C':
  47.                         if self.options.behave <= 1:
  48.                             #shorten handles towards end points
  49.                             params[:2] = pointAtPercent(params[:2],last[:],self.options.percent)    
  50.                             params[2:4] = pointAtPercent(params[2:4],params[-2:],self.options.percent)
  51.                         else:
  52.                             #shorten handles towards thirds of the segment                            
  53.                             dest1 = pointAtPercent(last[:],params[-2:],33.3)
  54.                             dest2 = pointAtPercent(params[-2:],last[:],33.3)
  55.                             params[:2] = pointAtPercent(params[:2],dest1[:],self.options.percent)    
  56.                             params[2:4] = pointAtPercent(params[2:4],dest2[:],self.options.percent)
  57.                     elif cmd == 'Q':
  58.                         dest = pointAtPercent(last[:],params[-2:],50)
  59.                         params[:2] = pointAtPercent(params[:2],dest,self.options.percent)
  60.                     if cmd == 'M':
  61.                         subPathStart = params[-2:]
  62.                     if cmd == 'Z':
  63.                         last = subPathStart[:]
  64.                     else:
  65.                         last = params[-2:]
  66.                 d.value = simplepath.formatPath(p)
  67.  
  68. e = SegmentStraightener()
  69. e.affect()
  70.