84 lines
3.1 KiB
Python
Executable file
84 lines
3.1 KiB
Python
Executable file
#!/usr/bin/env python3
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# coding=utf-8
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#
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# Copyright (C) 2005 Aaron Spike, aaron@ekips.org
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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"""Straintens path segments (but doesn't turn them into lines)"""
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import inkex
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from inkex.bezier import percent_point
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class SegmentStraightener(inkex.EffectExtension):
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"""Make segments straiter"""
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def add_arguments(self, pars):
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pars.add_argument(
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"-p",
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"--percent",
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type=float,
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default=50.0,
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help="move curve handles PERCENT percent closer to a straight line",
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)
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pars.add_argument(
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"-b",
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"--behavior",
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type=int,
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default=1,
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help="straightening behavior for cubic segments",
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)
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def effect(self):
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for node in self.svg.selection.get(inkex.PathElement):
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path = node.path.to_arrays()
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last = []
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sub_start = []
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for cmd, params in path:
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if cmd == "C":
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if self.options.behavior <= 1:
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# shorten handles towards end points
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params[:2] = percent_point(
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params[:2], last[:], self.options.percent
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)
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params[2:4] = percent_point(
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params[2:4], params[-2:], self.options.percent
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)
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else:
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# shorten handles towards thirds of the segment
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dest1 = percent_point(last[:], params[-2:], 33.3)
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dest2 = percent_point(params[-2:], last[:], 33.3)
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params[:2] = percent_point(
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params[:2], dest1[:], self.options.percent
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)
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params[2:4] = percent_point(
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params[2:4], dest2[:], self.options.percent
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)
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elif cmd == "Q":
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dest = percent_point(last[:], params[-2:], 50)
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params[:2] = percent_point(params[:2], dest, self.options.percent)
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if cmd == "M":
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sub_start = params[-2:]
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if cmd == "Z":
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last = sub_start[:]
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else:
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last = params[-2:]
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node.path = path
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if __name__ == "__main__":
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SegmentStraightener().run()
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