mightyscape-1.2/extensions/fablabchemnitz/ifs_fractals/ifs_fractals.py

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#!/usr/bin/env python3
# coding=utf-8
#
# Copyright (C) 2020 Dylan Simon, dylan@dylex.net
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
"""
Perform fixed-depth IFS repeated duplicate-and-transform.
"""
import inkex
class IFSFractals(inkex.EffectExtension):
NXFORM = 5
XFORM_PARAMS = list("ABCDEF")
def add_arguments(self, pars):
pars.add_argument("--tab")
pars.add_argument("--iter", type=int, default=3, help="number of iterations")
for i in range(self.NXFORM):
pars.add_argument("--xform%d"%i, type=inkex.Boolean, default=False, help="enable transformation %d"%i)
for p in self.XFORM_PARAMS:
pars.add_argument("--%s%d"%(p,i), type=float, help="transformation matrix %d %s"%(i,p))
def effect(self):
xforms = []
for i in range(self.NXFORM):
if getattr(self.options,'xform%d'%i):
t = [getattr(self.options,"%s%d"%(p,i)) for p in self.XFORM_PARAMS]
xforms.append(inkex.Transform(t))
if not xforms:
inkex.errormsg(_('There are no transforms to apply'))
return False
if not self.svg.selected:
inkex.errormsg(_('There is no selection to duplicate'))
return False
nodes = self.svg.selected.values()
grp = inkex.Group('IFS')
layer = self.svg.get_current_layer().add(grp)
for i in range(self.options.iter):
n = []
for node in nodes:
for x in xforms:
d = node.copy()
d.transform = x @ d.transform
n.append(d)
g = inkex.Group('IFS iter %d'%i)
g.add(*n)
grp.add(g)
nodes = n
return True
if __name__ == '__main__':
IFSFractals().run()