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#!/usr/bin/env python
# coding=utf-8
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
"""Straintens path segments (but doesn't turn them into lines)"""
import inkex
from inkex.bezier import percent_point
class SegmentStraightener(inkex.EffectExtension):
"""Make segments straiter"""
def add_arguments(self, pars):
pars.add_argument(
"-p",
"--percent",
type=float,
default=50.0,
help="move curve handles PERCENT percent closer to a straight line",
)
pars.add_argument(
"-b",
"--behavior",
type=int,
default=1,
help="straightening behavior for cubic segments",
)
def effect(self):
for node in self.svg.selection.get(inkex.PathElement):
path = node.path.to_arrays()
last = []
sub_start = []
for cmd, params in path:
if cmd == "C":
if self.options.behavior <= 1:
# shorten handles towards end points
params[:2] = percent_point(
params[:2], last[:], self.options.percent
)
params[2:4] = percent_point(
params[2:4], params[-2:], self.options.percent
)
else:
# shorten handles towards thirds of the segment
dest1 = percent_point(last[:], params[-2:], 33.3)
dest2 = percent_point(params[-2:], last[:], 33.3)
params[:2] = percent_point(
params[:2], dest1[:], self.options.percent
)
params[2:4] = percent_point(
params[2:4], dest2[:], self.options.percent
)
elif cmd == "Q":
dest = percent_point(last[:], params[-2:], 50)
params[:2] = percent_point(params[:2], dest, self.options.percent)
if cmd == "M":
sub_start = params[-2:]
if cmd == "Z":
last = sub_start[:]
else:
last = params[-2:]
node.path = path
if __name__ == "__main__":
SegmentStraightener().run()
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