Added "Purge Duplicate Path Nodes"
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extensions/fablabchemnitz/removeDuplicateNodes.inx
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extensions/fablabchemnitz/removeDuplicateNodes.inx
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<?xml version="1.0" encoding="UTF-8"?>
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<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
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<name>Purge Duplicate Path Nodes</name>
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<id>fablabchemnitz.de.purge_duplicate_path_nodes</id>
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<param name="help" type="description">Remove duplicate nodes from selected paths.</param>
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<param name="minUse" type="boolean" gui-text="Also remove segments with length less than specified length">false</param>
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<param name="minlength" indent="6" type="float" precision="1" min="0" max="9999" gui-text="Minimum segment length">0.01</param>
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<param name="joinEnd" type="boolean" gui-text="Join end nodes of each subpath if distance less or equal to">false</param>
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<param name="maxdist" indent="6" type="float" precision="1" min="0" max="9999" gui-text="Max opening">0.01</param>
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<param name="unitinfo" type="description">Unit as defined in document (File->Document Properties).</param>
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<effect>
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<object-type>path</object-type>
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<effects-menu>
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<submenu name="FabLab Chemnitz">
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<submenu name="Nesting/Cut Optimization"/>
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</submenu>
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</effects-menu>
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</effect>
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<script>
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<command location="inx" interpreter="python">removeDuplicateNodes.py</command>
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</script>
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</inkscape-extension>
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extensions/fablabchemnitz/removeDuplicateNodes.py
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extensions/fablabchemnitz/removeDuplicateNodes.py
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#!/usr/bin/env python
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# coding=utf-8
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#
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# Copyright (C) 2020 Ellen Wasboe, ellen@wasbo.net
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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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Remove duplicate nodes or join nodes with distance less than specified.
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Optionally join start node with end node of each subpath if distance less than specified.
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"""
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import inkex
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from inkex import bezier, PathElement, CubicSuperPath
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class removeDuplicateNodes(inkex.EffectExtension):
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def add_arguments(self, pars):
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pars.add_argument("--minlength", default="0")
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pars.add_argument("--minUse", type=inkex.Boolean, default=False)
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pars.add_argument("--maxdist", default="0")
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pars.add_argument("--joinEnd", type=inkex.Boolean, default=False)
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"""Remove duplicate nodes"""
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def effect(self):
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for id, elem in self.svg.selected.items():
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minlength=float(self.options.minlength)
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maxdist=float(self.options.maxdist)
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if self.options.minUse == False:
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minlength=0
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if self.options.joinEnd == False:
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maxdist=-1
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#register which subpaths are closed
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dList=str(elem.path).upper().split(' M')
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closed=[""]
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l=0
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for sub in dList:
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if dList[l].find("Z") > -1:
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closed.append(" Z ")
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else:
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closed.append("")
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l+=1
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closed.pop(0)
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new = []
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s=0
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for sub in elem.path.to_superpath():
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new.append([sub[0]])
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i = 1
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while i <= len(sub) - 1:
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length = bezier.cspseglength(new[-1][-1], sub[i]) #curve length
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if length >= minlength:
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new[-1].append(sub[i])
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else:
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#average last node xy with this node xy and set this further node to last
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new[-1][-1][1][0]= 0.5*(new[-1][-1][1][0]+sub[i][1][0])
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new[-1][-1][1][1]= 0.5*(new[-1][-1][1][1]+sub[i][1][1])
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new[-1][-1][-1]=sub[i][-1]
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i += 1
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if maxdist > -1:
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#calculate distance between first and last node
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#if <= maxdist set closed[i] to "Z "
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last=new[-1][-1]
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length = bezier.cspseglength(new[-1][-1], sub[0])
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if length <= maxdist:
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newStartEnd=[0.5*(new[-1][-1][-1][0]+new[0][0][0][0]),0.5*(new[-1][-1][-1][1]+new[0][0][0][1])]
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new[0][0][0]=newStartEnd
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new[0][0][1]=newStartEnd
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new[-1][-1][1]=newStartEnd
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new[-1][-1][2]=newStartEnd
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closed[s]=" Z "
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s+=1
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elem.path = CubicSuperPath(new).to_path(curves_only=True)
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#reset z to the originally closed paths (z lost in cubicsuperpath)
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temppath=str(elem.path.to_absolute()).split('M ')
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temppath.pop(0)
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newPath=''
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l=0
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for sub in temppath:
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newPath=newPath+'M '+temppath[l]+closed[l]
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l+=1
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elem.path=newPath
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if __name__ == '__main__':
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removeDuplicateNodes().run()
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