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Diffstat (limited to 'share/extensions/jitternodes.py')
| -rwxr-xr-x | share/extensions/jitternodes.py | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/share/extensions/jitternodes.py b/share/extensions/jitternodes.py new file mode 100755 index 000000000..d6f5ce36d --- /dev/null +++ b/share/extensions/jitternodes.py @@ -0,0 +1,109 @@ +#!/usr/bin/env python +''' +Copyright (C) 2012 Juan Pablo Carbajal ajuanpi-dev@gmail.com +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 3 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +''' +import random, math, inkex, cubicsuperpath + +def randomize((x, y), rx, ry, dist): + + if dist == "Gaussian": + r1 = random.gauss(0.0,rx) + r2 = random.gauss(0.0,ry) + elif dist == "Pareto": + ''' + sign is used ot fake a double sided pareto distribution. + for parameter value between 1 and 2 the distribution has infinite variance + I truncate the distribution to a high value and then normalize it. + The idea is to get spiky distributions, any distribution with long-tails is + good (ideal would be Levy distribution). + ''' + sign = random.uniform(-1.0,1.0) + + r1 = min(random.paretovariate(1.0), 20.0)/20.0 + r2 = min(random.paretovariate(1.0), 20.0)/20.0 + + r1 = rx * math.copysign(r1, sign) + r2 = ry * math.copysign(r2, sign) + elif dist == "Lognorm": + sign = random.uniform(-1.0,1.0) + r1 = rx * math.copysign(random.lognormvariate(0.0,1.0)/3.5,sign) + r2 = ry * math.copysign(random.lognormvariate(0.0,1.0)/3.5,sign) + elif dist == "Uniform": + r1 = random.uniform(-rx,rx) + r2 = random.uniform(-ry,ry) + + x += r1 + y += r2 + + return [x, y] + +class JitterNodes(inkex.Effect): + def __init__(self): + inkex.Effect.__init__(self) + self.OptionParser.add_option("--title") + self.OptionParser.add_option("-x", "--radiusx", + action="store", type="float", + dest="radiusx", default=10.0, + help="Randomly move nodes and handles within this radius, X") + self.OptionParser.add_option("-y", "--radiusy", + action="store", type="float", + dest="radiusy", default=10.0, + help="Randomly move nodes and handles within this radius, Y") + self.OptionParser.add_option("-c", "--ctrl", + action="store", type="inkbool", + dest="ctrl", default=True, + help="Randomize control points") + self.OptionParser.add_option("-e", "--end", + action="store", type="inkbool", + dest="end", default=True, + help="Randomize nodes") + self.OptionParser.add_option("-d", "--dist", + action="store", type="string", + dest="dist", default="Uniform", + help="Choose the distribution of the displacements") + self.OptionParser.add_option("--tab", + action="store", type="string", + dest="tab", + help="The selected UI-tab when OK was pressed") + + def effect(self): + for id, node in self.selected.iteritems(): + if node.tag == inkex.addNS('path','svg'): + d = node.get('d') + p = cubicsuperpath.parsePath(d) + for subpath in p: + for csp in subpath: + if self.options.end: + delta=randomize([0,0], self.options.radiusx, self.options.radiusy, self.options.dist) + csp[0][0]+=delta[0] + csp[0][1]+=delta[1] + csp[1][0]+=delta[0] + csp[1][1]+=delta[1] + csp[2][0]+=delta[0] + csp[2][1]+=delta[1] + if self.options.ctrl: + csp[0]=randomize(csp[0], self.options.radiusx, self.options.radiusy, self.options.dist) + csp[2]=randomize(csp[2], self.options.radiusx, self.options.radiusy, self.options.dist) + node.set('d',cubicsuperpath.formatPath(p)) + +if __name__ == '__main__': + e = JitterNodes() + e.affect() + + +# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99 |