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#!/usr/bin/env python
'''
Copyright (C) 2005 Aaron Spike, aaron@ekips.org
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
'''
import math, inkex, cubicsuperpath
class Whirl(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
self.OptionParser.add_option("-x", "--centerx",
action="store", type="float",
dest="centerx", default=10.0,
help="")
self.OptionParser.add_option("-y", "--centery",
action="store", type="float",
dest="centery", default=0.0,
help="")
self.OptionParser.add_option("-t", "--whirl",
action="store", type="float",
dest="whirl", default=1.0,
help="amount of whirl")
self.OptionParser.add_option("-r", "--rotation",
action="store", type="inkbool",
dest="rotation", default=True,
help="direction of rotation")
def effect(self):
for id, node in self.selected.iteritems():
rotation = -1
if self.options.rotation == True:
rotation = 1
whirl = self.options.whirl / 1000
if node.tagName == 'path':
d = node.attributes.getNamedItem('d')
p = cubicsuperpath.parsePath(d.value)
for sub in p:
for csp in sub:
for point in csp:
point[0] -= self.options.centerx
point[1] -= self.options.centery
dist = math.sqrt((point[0] ** 2) + (point[1] ** 2))
if dist != 0:
a = rotation * dist * whirl
theta = math.atan2(point[1], point[0]) + a
point[0] = (dist * math.cos(theta))
point[1] = (dist * math.sin(theta))
point[0] += self.options.centerx
point[1] += self.options.centery
d.value = cubicsuperpath.formatPath(p)
e = Whirl()
e.affect()
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