FabLab_Chemnitz/mightyscape-1.1-deprecated
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added vpype linesort extension (experimental right now)

This commit is contained in:
Mario Voigt 2021-04-02 10:20:08 +02:00
parent 89c6b4ec27
commit 16779bb3af
2 changed files with 225 additions and 0 deletions
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extensions/fablabchemnitz/vpype_tools/vpype_linesort.inx Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
<name>Optimize Sequence: Line Sorting (vpype)</name>
<id>fablabchemnitz.de.vpype_linesorting</id>
<label appearance="header">Line Sorting</label>
<label>Sort lines to minimize travel distances.</label>
<param name="linesort_no_flip" type="bool" gui-text="Disable flipping" gui-description="Disable reversing stroke direction for optimization '--no-flip'">false</param>
<spacer/>
<label appearance="header">General Settings</label>
<param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
<param name="output_show" type="bool" gui-text="Show debug output" gui-description="This will open a new matplotlib window showing modified SVG data">false</param>
<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths will be removed">false</param>
<label appearance="header">About</label>
<separator/>
<label appearance="url">https://fablabchemnitz.de</label>
<label>License: GNU GPL v3</label>
<effect needs-live-preview="true">
<effects-menu>
<submenu name="FabLab Chemnitz">
<submenu name="Nesting/Cut Optimization"/>
</submenu>
</effects-menu>
</effect>
<script>
<command location="inx" interpreter="python">vpypetools.py</command>
</script>
</inkscape-extension>

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extensions/fablabchemnitz/vpype_tools/vpypetools.py Normal file
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#!/usr/bin/env python3
# suppress some nasty warnings we don't want. Note that this is really generic. For developing purposes re-enable this
import logging
for key in logging.Logger.manager.loggerDict:
print(key)
logging.getLogger().setLevel(logging.CRITICAL)
import sys
import os
from lxml import etree
import inkex
from inkex import transforms
from inkex.paths import CubicSuperPath
from inkex.command import inkscape
import vpype
import vpype_viewer
from vpype_viewer import ViewMode
from vpype_cli import execute
from shapely.geometry import LineString, Point
"""
Extension for InkScape 1.X
Author: Mario Voigt / FabLab Chemnitz
Mail: mario.voigt@stadtfabrikanten.org
Date: 01.04.2021
Last patch: 01.04.2021
License: GNU GPL v3
Used version of vpype: commit id https://github.com/abey79/vpype/commit/0b0dc8dd7e32998dbef639f9db578c3bff02690b
CLI / API docs:
- https://vpype.readthedocs.io/en/stable/api/vpype_cli.html#module-vpype_cli
- https://vpype.readthedocs.io/en/stable/api/vpype.html#module-vpype
vpype commands could be performed differently:
- 1. Work with current selection (line-wise): we could get the selected nodes/groups and check if those nodes are paths. If yes we could convert them to polylines and put it into vpype using doc.add(LineCollection, Layer)
- 2. We could execute vpype on the complete document only (svg file handling, possible as one layer or multiple layers)
working line of code (example:) doc = vpype.read_multilayer_svg(self.options.input_file, quantization=0.1, crop=False, simplify=False, parallel=False)
Todo's
- show_pen_up does not work. does not get written to svg file properly > https://github.com/abey79/vpype/issues/242
- https://github.com/abey79/vpype/issues/243
"""
class vpypetools (inkex.EffectExtension):
def __init__(self):
inkex.Effect.__init__(self)
self.arg_parser.add_argument("--linesort_no_flip", type=inkex.Boolean, default=False, help="Disable reversing stroke direction for optimization")
self.arg_parser.add_argument("--apply_transformations", type=inkex.Boolean, default=False, help="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting")
self.arg_parser.add_argument("--output_show", type=inkex.Boolean, default=False, help="This will open a new matplotlib window showing modified SVG data")
self.arg_parser.add_argument("--output_stats", type=inkex.Boolean, default=False, help="Show output statistics before/after conversion")
self.arg_parser.add_argument("--output_trajectories", type=inkex.Boolean, default=False, help="Add paths for the travel trajectories")
self.arg_parser.add_argument("--keep_selection", type=inkex.Boolean, default=True, help="If false, selected paths will be removed")
def effect(self):
lc = vpype.LineCollection() # create a new array of LineStrings consisting of Points. We convert selected paths to polylines and grab their points
nodesToConvert = [] # we make an array of all collected nodes to get the boundingbox of that array. We need it to place the vpype converted stuff to the correct XY coordinates
applyTransformAvailable = False
# at first we apply external extension
try:
sys.path.append("..") # add parent directory to path to allow importing applytransform (vpype extension is encapsulated in sub directory)
import applytransform
applyTransformAvailable = True
except Exception as e:
# inkex.utils.debug(e)
inkex.utils.debug("Calling 'Apply Transformations' extension failed. Maybe the extension is not installed. You can download it from official InkScape Gallery. Skipping this step")
def convertPath(node):
if node.tag == inkex.addNS('path','svg'):
nodesToConvert.append(node)
d = node.get('d')
p = CubicSuperPath(d)
points = []
for subpath in p:
for csp in subpath:
points.append(Point(csp[1][0], csp[1][1]))
lc.append(LineString(points))
children = node.getchildren()
if children is not None:
for child in children:
convertPath(child)
# inkex.utils.debug(str(applyTransformAvailable)) #check if ApplyTransform Extension is available. If yes we use it
if self.options.apply_transformations is True and applyTransformAvailable is True:
applytransform.ApplyTransform().recursiveFuseTransform(self.document.getroot())
# getting the bounding box of the current selection. We use to calculate the offset XY from top-left corner of the canvas. This helps us placing back the elements
bbox = None
if len(self.svg.selected) == 0:
convertPath(self.document.getroot())
for element in nodesToConvert:
bbox += element.bounding_box()
else:
for id, item in self.svg.selected.items():
convertPath(item)
bbox = inkex.elements._selected.ElementList.bounding_box(self.svg.selected) # get BoundingBox for selection
# inkex.utils.debug(bbox)
#l c.as_mls() #cast LineString array to MultiLineString
if len(lc) == 0:
inkex.errormsg('Selection does not contain any paths. Try to cast your objects to paths using CTRL + SHIFT + C or strokes to paths using CTRL + ALT+ C')
return
doc = vpype.Document() #create new vpype document
# we add the lineCollection (converted selection) to the vpype document
doc.add(lc, layer_id=None)
if self.options.output_stats is True:
tooling_length_before = doc.length()
traveling_length_before = doc.pen_up_length()
# build and execute the conversion command
command = "linesort "
if self.options.linesort_no_flip:
command += " --no-flip"
# inkex.utils.debug(command)
doc = execute(command, doc)
# show the vpype document visually
# there are missing options to set pen_width and pen_opacity. This is anchored in "Engine" class
if self.options.output_show:
vpype_viewer.show(doc, view_mode=ViewMode.PREVIEW, show_pen_up=self.options.output_trajectories, show_points=False, argv=None) # https://vpype.readthedocs.io/en/stable/api/vpype_viewer.ViewMode.html
if self.options.output_stats is True:
tooling_length_after = doc.length()
traveling_length_after = doc.pen_up_length()
if tooling_length_before > 0:
tooling_length_saving = (1.0 - tooling_length_after / tooling_length_before) * 100.0
else:
tooling_length_saving = 0.0
if traveling_length_before > 0:
traveling_length_saving = (1.0 - traveling_length_after / traveling_length_before) * 100.0
else:
traveling_length_saving = 0.0
inkex.utils.debug('Total tooling length before vpype conversion: ' + str('{:0.2f}'.format(tooling_length_before)) + ' mm')
inkex.utils.debug('Total traveling length before vpype conversion: ' + str('{:0.2f}'.format(traveling_length_before)) + ' mm')
inkex.utils.debug('Total tooling length after vpype conversion: ' + str('{:0.2f}'.format(tooling_length_after)) + ' mm')
inkex.utils.debug('Total traveling length after vpype conversion: ' + str('{:0.2f}'.format(traveling_length_after)) + ' mm')
inkex.utils.debug('Total tooling length optimized: ' + str('{:0.2f}'.format(tooling_length_saving)) + ' %')
inkex.utils.debug('Total traveling length optimized: ' + str('{:0.2f}'.format(traveling_length_saving)) + ' %')
# save the vpype document to new svg file and close it afterwards
output_file = self.options.input_file + ".vpype.svg"
output_fileIO = open(output_file, "w", encoding="utf-8")
vpype.write_svg(output_fileIO, doc, page_size=None, center=False, source_string='', layer_label_format='%d', show_pen_up=self.options.output_trajectories, color_mode='layer')
output_fileIO.close()
# convert vpype polylines/lines/polygons to regular paths again. We need to use "--with-gui" to respond to "WARNING: ignoring verb FileSave - GUI required for this verb."
cli_output = inkscape(output_file, "--with-gui", actions="EditSelectAllInAllLayers;EditUnlinkClone;ObjectToPath;FileSave;FileQuit")
if len(cli_output) > 0:
self.debug(_("Inkscape returned the following output when trying to run the vpype object to path back-conversion:"))
self.debug(cli_output)
# new parse the SVG file and insert it as new group into the current document tree
# converted = etree.parse(output_file).getroot()
converted = etree.parse(output_file).getroot().xpath("//svg:g[@inkscape:label='1']",namespaces=inkex.NSS) # the label id is the number of layer_id=None (will start with 1)
newGroup = self.document.getroot().add(inkex.Group())
newGroup.set('style', 'stroke:#000000;stroke-width:1px;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;fill:none')
for child in converted[0].getchildren():
newGroup.append(child)
newGroup.attrib['transform'] = 'translate(' + str(bbox.left) + ',' + str(bbox.top) + ')'
newGroupId = self.svg.get_unique_id('vpypetools-')
newGroup.set('id', newGroupId)
# inkex.utils.debug(self.svg.selection.first()) # get the first selected element. Chould be None
self.svg.selection.set(newGroupId)
#inkex.utils.debug(self.svg.selection.first()) # get the first selected element again to check if changing selection has worked
# we apply transformations also for new group to remove the "translate()" again
if self.options.apply_transformations and applyTransformAvailable:
for node in self.svg.selection:
applytransform.ApplyTransform().recursiveFuseTransform(node)
# Delete the temporary file again because we do not need it anymore
if os.path.exists(output_file):
os.remove(output_file)
# Remove selection objects to do a real replace with new objects from vpype document
if self.options.keep_selection is False:
for node in nodesToConvert:
node.getparent().remove(node)
if __name__ == '__main__':
vpypetools().run()