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#!/usr/bin/env python
# coding=utf-8
#
# Copyright (C) 2005, 2007 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.
"""
This extension either adds nodes to a path so that
No segment is longer than a maximum value OR that each segment is divided
into a given number of equal segments.
"""
import math
import inkex
from inkex import bezier, PathElement, CubicSuperPath
class AddNodes(inkex.EffectExtension):
"""Extension to split a path by adding nodes to it"""
def add_arguments(self, pars):
pars.add_argument(
"--segments",
type=int,
default=2,
help="Number of segments to divide the path into",
)
pars.add_argument(
"--max",
type=float,
default=10.0,
help="Number of segments to divide the path into",
)
pars.add_argument(
"--method", default="bymax", help="The kind of division to perform"
)
pars.add_argument(
"--unit", default="px", help="Unit for maximum segment length"
)
def effect(self):
for node in self.svg.selection.filter(PathElement):
new = []
for sub in node.path.to_superpath():
new.append([sub[0][:]])
i = 1
while i <= len(sub) - 1:
length = bezier.cspseglength(new[-1][-1], sub[i])
if self.options.method == "bynum":
splits = self.options.segments
else:
maxlen = self.svg.viewport_to_unit(
f"{self.options.max}{self.options.unit}"
)
splits = math.ceil(length / maxlen)
for sel in range(int(splits), 1, -1):
result = bezier.cspbezsplitatlength(
new[-1][-1], sub[i], 1.0 / sel
)
better_result = [
[list(el) for el in elements] for elements in result
]
new[-1][-1], nxt, sub[i] = better_result
new[-1].append(nxt[:])
new[-1].append(sub[i])
i += 1
node.path = CubicSuperPath(new).to_path(curves_only=False)
if __name__ == "__main__":
AddNodes().run()
|
