92 lines
3.1 KiB
Python
Executable file
92 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, 2007 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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This extension either adds nodes to a path so that
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No segment is longer than a maximum value OR that each segment is divided
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into a given number of equal segments.
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"""
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import math
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from typing import cast
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import inkex
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from inkex import PathElement
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class AddNodes(inkex.EffectExtension):
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"""Extension to split a path by adding nodes to it"""
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def add_arguments(self, pars):
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pars.add_argument(
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"--segments",
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type=int,
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default=2,
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help="Number of segments to divide the path into",
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)
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pars.add_argument(
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"--max",
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type=float,
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default=10.0,
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help="Number of segments to divide the path into",
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)
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pars.add_argument(
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"--method", default="bymax", help="The kind of division to perform"
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)
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pars.add_argument(
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"--unit", default="px", help="Unit for maximum segment length"
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)
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def effect(self):
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maxlen = self.svg.viewport_to_unit(f"{self.options.max}{self.options.unit}")
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for node in self.svg.selection.filter(PathElement):
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new = inkex.Path()
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path = cast(inkex.Path, node.path)
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for sub in path.proxy_iterator():
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if sub.letter in "mM":
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# Add unchanged.
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new.append(sub.command)
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continue
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length = sub.length()
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if length < 1e-12:
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# Zero-length subpaths
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new.append(sub.command)
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continue
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# compute number of splits
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if self.options.method == "bynum":
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splits = self.options.segments
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else:
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splits = math.ceil(length / maxlen)
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to_split = sub
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# We first split the command at len * 1/splits.
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# The first part is appended, the second part is split
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# again at then len * 1/splits and so on.
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for _ in range(splits - 1):
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result = to_split.split(to_split.ilength(length / splits))
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new.append(result[0].command)
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to_split = result[1]
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new.append(to_split.command)
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node.path = new
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if __name__ == "__main__":
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AddNodes().run()
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