1494 lines
57 KiB
Python
1494 lines
57 KiB
Python
#!/usr/bin/env python3
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#
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# paths2openscad.py
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#
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# This is an Inkscape extension to output paths to extruded OpenSCAD polygons
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# The Inkscape objects must first be converted to paths (Path > Object to
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# Path). Some paths may not work well -- the paths have to be polygons. As
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# such, paths derived from text may meet with mixed results.
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# Written by Daniel C. Newman ( dan dot newman at mtbaldy dot us )
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#
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# 2020-06-18
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# Updated by Sillyfrog (https://github.com/sillyfrog) to support
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# Inkscape v1.0 (exclusively, prior versions) are no longer supported).
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# Updated to run under python3 now python2 is end of life.
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#
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# 10 June 2012
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#
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# 15 June 2012
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# Updated by Dan Newman to handle a single level of polygon nesting.
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# This is sufficient to handle most fonts.
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# If you want to nest two polygons, combine them into a single path
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# within Inkscape with "Path > Combine Path".
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#
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# 15 August 2014
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# Updated by Josef Skladanka to automatically set extruded heights
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#
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# 2017-03-11, juergen@fabmail.org
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# 0.12 parse svg width="400mm" correctly. Came out downscaled by 3...
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#
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# 2017-04-08, juergen@fabmail.org
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# 0.13 allow letter 'a' prefix on zsize values for anti-matter.
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# All anti-matter objects are subtracted from all normal objects.
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# raise: Offset along Z axis, to make cut-outs and balconies.
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# Refactored object_merge_extrusion_values() from convertPath().
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# Inheriting extrusion values from enclosing groups.
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#
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# 2017-04-10, juergen@fabmail.org
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# 0.14 Started merging V7 outline mode by Neon22.
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# (http://www.thingiverse.com/thing:1065500)
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# Toplevel object from http://www.thingiverse.com/thing:1286041
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# is already included.
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#
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# 2017-04-16, juergen@fabmail.org
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# 0.15 Fixed https://github.com/fablabnbg/inkscape-paths2openscad/
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# issues/1#issuecomment-294257592
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# Line width of V7 code became a minimum line width,
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# rendering is now based on stroke-width
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# Refactored LengthWithUnit() from getLength()
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# Finished merge with v7 code.
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# Subpath in subpath are now handled very nicely.
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# Added msg_extrude_by_hull_and_paths() outline mode with nested paths.
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#
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# 2017-06-12, juergen@fabmail.org
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# 0.16 Feature added: scale: XXX to taper the object while extruding.
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# 2017-06-15, juergen@fabmail.org
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# 0.17 scale is now centered on each path. and supports an optional second
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# value for explicit Y scaling. Renamed the autoheight command line
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# option to 'parsedesc' with default true. Renamed dict auto to
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# extrusion. Rephrased all prose to refer to extrusion syntax rather
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# than auto zsize.
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# 2017-06-18, juergen@fabmail.org
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# 0.18 pep8 relaxed. all hard 80 cols line breaks removed.
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# Refactored the commands into a separate tab in the inx.
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# Added 'View in OpenSCAD' feature with pidfile for single instance.
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#
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# 2017-08-10, juergen@fabmail.org
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# 0.19 fix style="" elements.
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#
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# 2017-11-14, juergen@fabmail.org
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# 0.20 do not traverse into objects with style="display:none"
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# some precondition checks had 'pass' but should have 'continue'.
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#
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# 2018-01-21, juergen@fabmail.org
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# 0.21 start a new openscad instance if the command has changed.
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#
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# 2018-01-27, juergen@fabmail.org
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# 0.22 command comparison fixed. do not use 0.21 !
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#
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# 2018-02-18, juergen@fabmail.org
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# 0.23 fixed rect with x=0 not rendered.
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# FIXME: should really use inksvg.py here too!
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#
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# 2018.09-09, juergen@fabmail.org
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# 0.24 merged module feature, renamed Height,Raise to Zsize,Zoffset
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#
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# 2019-01-18, juergen@fabmail.org
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# 0.25 Allow Depth,Offset instead of Zsize,Zoffset
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# Simplify the syntax description page.
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# Added parameter line_width_scale.
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# Added parameter chamfer, and module chamfer_sphere for doing minkowski
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#
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# 2020-03-12, juergen@fabmail.org
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# 0.26 DEB: relax dependency on 'openscad' to 'openscad | bash'
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#
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# 2020-04-05, juergen@fabmail.org
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# 0.27 Make pep8 happy again. Give proper error message, when file was not saved.
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#
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# CAUTION: keep the version number in sync with paths2openscad.inx about page
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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import os
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import sys
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import os.path
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import inkex
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import inkex.paths
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import inkex.bezier
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from inkex.transforms import Transform
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import re
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import time
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import string
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import tempfile
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import gettext
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VERSION = "0.27" # CAUTION: Keep in sync with all *.inx files
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DEFAULT_WIDTH = 100
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DEFAULT_HEIGHT = 100
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# Parse all these as 56.7 mm zsize:
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# "path1234_56_7_mm", "pat1234____57.7mm", "path1234_57.7__mm"
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#
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# The verbs Height and Raise are deprecated. Use Zsize and Zoffset, (or Depth and Offset) instead.
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RE_AUTO_ZSIZE_ID = re.compile(r".*?_+([aA]?\d+(?:[_\.]\d+)?)_*mm$")
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RE_AUTO_ZSIZE_DESC = re.compile(
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r"^(?:[Hh]eight|[Dd]epth|[Zz]-?size):\s*([aA]?\d+(?:\.\d+)?) ?mm$", re.MULTILINE
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)
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RE_AUTO_SCALE_DESC = re.compile(
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r"^(?:sc|[Ss]cale|[Tt]aper):\s*(\d+(?:\.\d+)?(?: ?, ?\d+(?:\.\d+)?)?) ?%$",
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re.MULTILINE,
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)
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RE_AUTO_ZOFFSET_DESC = re.compile(
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r"^(?:[Rr]aise|[Zz]-?offset|[Oo]ffset):\s*(\d+(?:\.\d+)?) ?mm$", re.MULTILINE
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)
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DESC_TAGS = ["desc", inkex.addNS("desc", "svg")]
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# CAUTION: keep these defaults in sync with paths2openscad.inx
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INX_SCADVIEW = os.getenv("INX_SCADVIEW", "openscad '{NAME}.scad'")
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INX_SCAD2STL = os.getenv("INX_SCAD2STL", "openscad '{NAME}.scad' -o '{NAME}.stl'")
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INX_STL_POSTPROCESSING = os.getenv("INX_STL_POSTPROCESSING", "cura '{NAME}.stl' &")
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def IsProcessRunning(pid):
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"""
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Windows code from https://stackoverflow.com/questions/7647167/check-if-a-process-is-running-in-python-in-linux-unix
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"""
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sys_platform = sys.platform.lower()
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if sys_platform.startswith("win"):
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import subprocess
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ps = subprocess.Popen(
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r'tasklist.exe /NH /FI "PID eq %d"' % (pid),
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shell=True,
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stdout=subprocess.PIPE,
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)
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output = ps.stdout.read()
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ps.stdout.close()
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ps.wait()
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if str(pid) in output:
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return True
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return False
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else:
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# OSX sys_platform.startswith('darwin'):
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# and Linux
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try:
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os.kill(pid, 0)
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return True
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except OSError:
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return False
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def parseLengthWithUnits(str, default_unit="px"):
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"""
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Parse an SVG value which may or may not have units attached
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This version is greatly simplified in that it only allows: no units,
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units of px, and units of %. Everything else, it returns None for.
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There is a more general routine to consider in scour.py if more
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generality is ever needed.
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With inkscape 0.91 we need other units too: e.g. svg:width="400mm"
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"""
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u = default_unit
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s = str.strip()
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if s[-2:] in ("px", "pt", "pc", "mm", "cm", "in", "ft"):
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u = s[-2:]
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s = s[:-2]
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elif s[-1:] in ("m", "%"):
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u = s[-1:]
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s = s[:-1]
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try:
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v = float(s)
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except Exception:
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return None, None
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return v, u
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def pointInBBox(pt, bbox):
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"""
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Determine if the point pt=[x, y] lies on or within the bounding
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box bbox=[xmin, xmax, ymin, ymax].
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"""
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# if ( x < xmin ) or ( x > xmax ) or ( y < ymin ) or ( y > ymax )
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if (pt[0] < bbox[0]) or (pt[0] > bbox[1]) or (pt[1] < bbox[2]) or (pt[1] > bbox[3]):
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return False
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else:
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return True
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def bboxInBBox(bbox1, bbox2):
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"""
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Determine if the bounding box bbox1 lies on or within the
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bounding box bbox2. NOTE: we do not test for strict enclosure.
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Structure of the bounding boxes is
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bbox1 = [ xmin1, xmax1, ymin1, ymax1 ]
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bbox2 = [ xmin2, xmax2, ymin2, ymax2 ]
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"""
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# if ( xmin1 < xmin2 ) or ( xmax1 > xmax2 ) or
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# ( ymin1 < ymin2 ) or ( ymax1 > ymax2 )
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if (
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(bbox1[0] < bbox2[0])
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or (bbox1[1] > bbox2[1])
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or (bbox1[2] < bbox2[2])
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or (bbox1[3] > bbox2[3])
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):
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return False
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else:
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return True
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def pointInPoly(p, poly, bbox=None):
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"""
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Use a ray casting algorithm to see if the point p = [x, y] lies within
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the polygon poly = [[x1,y1],[x2,y2],...]. Returns True if the point
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is within poly, lies on an edge of poly, or is a vertex of poly.
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"""
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if (p is None) or (poly is None):
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return False
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# Check to see if the point lies outside the polygon's bounding box
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if bbox is not None:
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if not pointInBBox(p, bbox):
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return False
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# Check to see if the point is a vertex
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if p in poly:
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return True
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# Handle a boundary case associated with the point
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# lying on a horizontal edge of the polygon
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x = p[0]
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y = p[1]
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p1 = poly[0]
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p2 = poly[1]
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for i in range(len(poly)):
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if i != 0:
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p1 = poly[i - 1]
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p2 = poly[i]
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if (
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(y == p1[1])
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and (p1[1] == p2[1])
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and (x > min(p1[0], p2[0]))
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and (x < max(p1[0], p2[0]))
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):
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return True
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n = len(poly)
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inside = False
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p1_x, p1_y = poly[0]
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for i in range(n + 1):
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p2_x, p2_y = poly[i % n]
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if y > min(p1_y, p2_y):
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if y <= max(p1_y, p2_y):
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if x <= max(p1_x, p2_x):
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if p1_y != p2_y:
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intersect = p1_x + (y - p1_y) * (p2_x - p1_x) / (p2_y - p1_y)
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if x <= intersect:
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inside = not inside
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else:
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inside = not inside
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p1_x, p1_y = p2_x, p2_y
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return inside
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def polyInPoly(poly1, bbox1, poly2, bbox2):
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"""
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Determine if polygon poly2 = [[x1,y1],[x2,y2],...]
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contains polygon poly1.
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The bounding box information, bbox=[xmin, xmax, ymin, ymax]
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is optional. When supplied it can be used to perform rejections.
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Note that one bounding box containing another is not sufficient
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to imply that one polygon contains another. It's necessary, but
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not sufficient.
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"""
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# See if poly1's bboundin box is NOT contained by poly2's bounding box
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# if it isn't, then poly1 cannot be contained by poly2.
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if (bbox1 is not None) and (bbox2 is not None):
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if not bboxInBBox(bbox1, bbox2):
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return False
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# To see if poly1 is contained by poly2, we need to ensure that each
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# vertex of poly1 lies on or within poly2
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for p in poly1:
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if not pointInPoly(p, poly2, bbox2):
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return False
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# Looks like poly1 is contained on or in Poly2
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return True
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def subdivideCubicPath(sp, flat, i=1):
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"""
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[ Lifted from eggbot.py with impunity ]
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Break up a bezier curve into smaller curves, each of which
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is approximately a straight line within a given tolerance
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(the "smoothness" defined by [flat]).
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This is a modified version of cspsubdiv.cspsubdiv(): rewritten
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because recursion-depth errors on complicated line segments
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could occur with cspsubdiv.cspsubdiv().
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"""
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while True:
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while True:
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if i >= len(sp):
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return
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p0 = sp[i - 1][1]
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p1 = sp[i - 1][2]
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p2 = sp[i][0]
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p3 = sp[i][1]
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b = (p0, p1, p2, p3)
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if inkex.bezier.maxdist(b) > flat:
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break
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i += 1
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one, two = inkex.bezier.beziersplitatt(b, 0.5)
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sp[i - 1][2] = one[1]
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sp[i][0] = two[2]
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p = [one[2], one[3], two[1]]
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sp[i:1] = [p]
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def msg_linear_extrude(id, prefix):
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msg = (
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" translate (%s_%d_center) linear_extrude(height=h, convexity=10, scale=0.01*s)\n"
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+ " translate (-%s_%d_center) polygon(%s_%d_points);\n"
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)
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return msg % (id, prefix, id, prefix, id, prefix)
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def msg_linear_extrude_by_paths(id, prefix):
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msg = (
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" translate (%s_%d_center) linear_extrude(height=h, convexity=10, scale=0.01*s)\n"
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+ " translate (-%s_%d_center) polygon(%s_%d_points, %s_%d_paths);\n"
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)
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return msg % (id, prefix, id, prefix, id, prefix, id, prefix)
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def msg_extrude_by_hull(id, prefix):
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msg = (
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" for (t = [0: len(%s_%d_points)-2]) {\n" % (id, prefix)
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+ " hull() {\n"
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+ " translate(%s_%d_points[t]) \n" % (id, prefix)
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+ " cylinder(h=h, r=w/2, $fn=res);\n"
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+ " translate(%s_%d_points[t + 1]) \n" % (id, prefix)
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+ " cylinder(h=h, r=w/2, $fn=res);\n"
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+ " }\n"
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+ " }\n"
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)
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return msg
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def msg_extrude_by_hull_and_paths(id, prefix):
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msg = (
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" for (p = [0: len(%s_%d_paths)-1]) {\n" % (id, prefix)
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+ " pp = %s_%d_paths[p];\n" % (id, prefix)
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+ " for (t = [0: len(pp)-2]) {\n"
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+ " hull() {\n"
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+ " translate(%s_%d_points[pp[t]])\n" % (id, prefix)
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+ " cylinder(h=h, r=w/2, $fn=res);\n"
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+ " translate(%s_%d_points[pp[t+1]])\n" % (id, prefix)
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+ " cylinder(h=h, r=w/2, $fn=res);\n"
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+ " }\n"
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+ " }\n"
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+ " }\n"
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)
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return msg
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class OpenSCAD(inkex.Effect):
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def __init__(self):
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inkex.localization.localize() # does not help for localizing my *.inx file
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inkex.Effect.__init__(self)
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self.arg_parser.add_argument( "--tab", default="splash", help="The active tab when Apply was pressed", )
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self.arg_parser.add_argument( "--smoothness", type=float, default=float(0.2), help="Curve smoothing (less for more)", )
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self.arg_parser.add_argument( "--chamfer", type=float, default=float(1.), help="Add a chamfer radius, displacing all object walls outwards [mm]", )
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self.arg_parser.add_argument( "--chamfer_fn", type=int, default=int(4), help="Chamfer precision ($fn when generating the minkowski sphere)", )
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self.arg_parser.add_argument( "--zsize", default="5", help="Depth (Z-size) [mm]", )
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self.arg_parser.add_argument( "--min_line_width", type=float, default=float(1), help="Line width for non closed curves [mm]", )
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self.arg_parser.add_argument( "--line_width_scale_perc", type=float, default=float(1), help="Percentage of SVG line width. Use e.g. 26.46 to compensate a px/mm confusion. Default: 100 [%]", )
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self.arg_parser.add_argument( "--line_fn", type=int, default=int(4), help="Line width precision ($fn when constructing hull)", )
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self.arg_parser.add_argument( "--force_line", type=inkex.utils.Boolean, default=False, help="Force outline mode.", )
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self.arg_parser.add_argument( "--fname", default="{NAME}.scad", help="openSCAD output file derived from the svg file name.", )
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self.arg_parser.add_argument( "--parsedesc", default="true", help="Parse zsize and other parameters from object descriptions", )
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self.arg_parser.add_argument( "--scadview", default="false", help="Open the file with openscad ( details see --scadviewcmd option )", )
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self.arg_parser.add_argument( "--scadviewcmd", default=INX_SCADVIEW, help="Command used start an openscad viewer. Use {SCAD} for the openSCAD input.", )
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self.arg_parser.add_argument( "--scad2stl", default="false", help="Also convert to STL ( details see --scad2stlcmd option )", )
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self.arg_parser.add_argument( "--scad2stlcmd", default=INX_SCAD2STL, help="Command used to convert to STL. You can use {NAME}.scad for the openSCAD file to read and "
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+ "{NAME}.stl for the STL file to write.", )
|
|
self.arg_parser.add_argument( "--stlpost", default="false", help="Start e.g. a slicer. This implies the --scad2stl option. ( see --stlpostcmd )", )
|
|
self.arg_parser.add_argument( "--stlpostcmd", default=INX_STL_POSTPROCESSING, help="Command used for post processing an STL file (typically a slicer). You can use {NAME}.stl for the STL file.", )
|
|
self.arg_parser.add_argument( "--stlmodule",default="false", help="Output configured to comment out final rendering line, to create a module file for import.", )
|
|
|
|
self.userunitsx = 1.0 # Move to pure userunits per mm for v1.0
|
|
self.userunitsy = 1.0
|
|
self.px_used = False # raw px unit depends on correct dpi.
|
|
self.cx = float(DEFAULT_WIDTH) / 2.0
|
|
self.cy = float(DEFAULT_HEIGHT) / 2.0
|
|
self.xmin, self.xmax = (1.0E70, -1.0E70)
|
|
self.ymin, self.ymax = (1.0E70, -1.0E70)
|
|
|
|
# Dictionary of paths we will construct. It's keyed by the SVG node
|
|
# it came from. Such keying isn't too useful in this specific case,
|
|
# but it can be useful in other applications when you actually want
|
|
# to go back and update the SVG document
|
|
self.paths = {}
|
|
|
|
# Output file handling
|
|
self.call_list = []
|
|
self.call_list_neg = [] # anti-matter (holes via difference)
|
|
self.pathid = int(0)
|
|
|
|
# Output file
|
|
self.f = None
|
|
|
|
# For handling an SVG viewbox attribute, we will need to know the
|
|
# values of the document's <svg> width and height attributes as well
|
|
# as establishing a transform from the viewbox to the display.
|
|
|
|
self.docWidth = float(DEFAULT_WIDTH)
|
|
self.docHeight = float(DEFAULT_HEIGHT)
|
|
self.docTransform = Transform(None)
|
|
|
|
# Dictionary of warnings issued. This to prevent from warning
|
|
# multiple times about the same problem
|
|
self.warnings = {}
|
|
|
|
def getLength(self, name, default):
|
|
|
|
"""
|
|
Get the <svg> attribute with name "name" and default value "default"
|
|
Parse the attribute into a value and associated units. Then, accept
|
|
units of cm, ft, in, m, mm, pc, or pt. Convert to pixels.
|
|
|
|
Note that SVG defines 90 px = 1 in = 25.4 mm.
|
|
Note: Since inkscape 0.92 we use the CSS standard of 96 px = 1 in.
|
|
"""
|
|
str = self.document.getroot().get(name)
|
|
if str:
|
|
return self.LengthWithUnit(str)
|
|
else:
|
|
# No width specified; assume the default value
|
|
return float(default)
|
|
|
|
def LengthWithUnit(self, strn, default_unit="px"):
|
|
v, u = parseLengthWithUnits(strn, default_unit)
|
|
if v is None:
|
|
# Couldn't parse the value
|
|
return None
|
|
elif u == "mm":
|
|
return float(v) * (self.userunitsx)
|
|
elif u == "cm":
|
|
return float(v) * (self.userunitsx * 10.0)
|
|
elif u == "m":
|
|
return float(v) * (self.userunitsx * 1000.0)
|
|
elif u == "in":
|
|
return float(v) * self.userunitsx * 25.4
|
|
elif u == "ft":
|
|
return float(v) * 12.0 * self.userunitsx * 25.4
|
|
elif u == "pt":
|
|
# Use modern "Postscript" points of 72 pt = 1 in instead
|
|
# of the traditional 72.27 pt = 1 in
|
|
return float(v) * (self.userunitsx * 25.4 / 72.0)
|
|
elif u == "pc":
|
|
return float(v) * (self.userunitsx * 25.4 / 6.0)
|
|
elif u == "px":
|
|
self.px_used = True
|
|
return float(v)
|
|
else:
|
|
# Unsupported units
|
|
return None
|
|
|
|
def getDocProps(self):
|
|
"""
|
|
Get the document's height and width attributes from the <svg> tag.
|
|
Use a default value in case the property is not present or is
|
|
expressed in units of percentages.
|
|
"""
|
|
self.inkscape_version = self.document.getroot().get(
|
|
"{http://www.inkscape.org/namespaces/inkscape}version"
|
|
)
|
|
sodipodi_docname = self.document.getroot().get(
|
|
"{http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd}docname"
|
|
)
|
|
if sodipodi_docname is None:
|
|
sodipodi_docname = "inkscape"
|
|
# the document was not saved. We can assume it is v1 inkscape
|
|
self.basename = re.sub(r"\.SVG", "", sodipodi_docname, flags=re.I)
|
|
self.docHeight = self.getLength("height", DEFAULT_HEIGHT)
|
|
self.docWidth = self.getLength("width", DEFAULT_WIDTH)
|
|
|
|
if (self.docHeight is None) or (self.docWidth is None):
|
|
return False
|
|
else:
|
|
return True
|
|
|
|
def handleViewBox(self):
|
|
"""
|
|
Set up the document-wide transform in the event that the document has
|
|
an SVG viewbox, which it should as of v1.0
|
|
For details, see https://wiki.inkscape.org/wiki/index.php/Units_In_Inkscape
|
|
"""
|
|
|
|
if self.getDocProps():
|
|
viewbox = self.document.getroot().get("viewBox")
|
|
if viewbox:
|
|
vinfo = viewbox.strip().replace(",", " ").split()
|
|
vinfo = [float(i) for i in vinfo]
|
|
unitsx = abs(vinfo[0] - vinfo[2])
|
|
# unitsy = abs(vinfo[1] - vinfo[3])
|
|
self.userunitsx = self.docWidth / unitsx
|
|
# The above wiki page suggests that x and y scaling maybe different
|
|
# however in practice they are not
|
|
self.userunitsy = self.userunitsx
|
|
self.docTransform = Transform(
|
|
"scale(%f,%f)" % (self.userunitsx, self.userunitsy)
|
|
)
|
|
|
|
def getPathVertices(self, path, node=None, transform=None):
|
|
"""
|
|
Decompose the path data from an SVG element into individual
|
|
subpaths, each subpath consisting of absolute move to and line
|
|
to coordinates. Place these coordinates into a list of polygon
|
|
vertices.
|
|
"""
|
|
if not path:
|
|
# Path must have been devoid of any real content
|
|
return None
|
|
|
|
# Get a cubic super path
|
|
p = inkex.paths.CubicSuperPath(path)
|
|
if (not p) or (len(p) == 0):
|
|
# Probably never happens, but...
|
|
return None
|
|
|
|
if transform:
|
|
p = p.transform(transform)
|
|
|
|
# Now traverse the cubic super path
|
|
subpath_list = []
|
|
subpath_vertices = []
|
|
|
|
sp_xmin = None
|
|
sp_xmax = None
|
|
sp_ymin = None
|
|
sp_ymax = None
|
|
for sp in p:
|
|
|
|
# We've started a new subpath
|
|
# See if there is a prior subpath and whether we should keep it
|
|
if len(subpath_vertices):
|
|
subpath_list.append(
|
|
[subpath_vertices, [sp_xmin, sp_xmax, sp_ymin, sp_ymax]]
|
|
)
|
|
|
|
subpath_vertices = []
|
|
subdivideCubicPath(sp, float(self.options.smoothness))
|
|
|
|
# Note the first point of the subpath
|
|
first_point = sp[0][1]
|
|
subpath_vertices.append(first_point)
|
|
sp_xmin = first_point[0]
|
|
sp_xmax = first_point[0]
|
|
sp_ymin = first_point[1]
|
|
sp_ymax = first_point[1]
|
|
|
|
n = len(sp)
|
|
|
|
# Traverse each point of the subpath
|
|
for csp in sp[1:n]:
|
|
|
|
# Append the vertex to our list of vertices
|
|
pt = csp[1]
|
|
subpath_vertices.append(pt)
|
|
|
|
# Track the bounding box of this subpath
|
|
if pt[0] < sp_xmin:
|
|
sp_xmin = pt[0]
|
|
elif pt[0] > sp_xmax:
|
|
sp_xmax = pt[0]
|
|
if pt[1] < sp_ymin:
|
|
sp_ymin = pt[1]
|
|
elif pt[1] > sp_ymax:
|
|
sp_ymax = pt[1]
|
|
|
|
# Track the bounding box of the overall drawing
|
|
# This is used for centering the polygons in OpenSCAD around the
|
|
# (x,y) origin
|
|
if sp_xmin < self.xmin:
|
|
self.xmin = sp_xmin
|
|
if sp_xmax > self.xmax:
|
|
self.xmax = sp_xmax
|
|
if sp_ymin < self.ymin:
|
|
self.ymin = sp_ymin
|
|
if sp_ymax > self.ymax:
|
|
self.ymax = sp_ymax
|
|
|
|
# Handle the final subpath
|
|
if len(subpath_vertices):
|
|
subpath_list.append(
|
|
[subpath_vertices, [sp_xmin, sp_xmax, sp_ymin, sp_ymax]]
|
|
)
|
|
|
|
if len(subpath_list) > 0:
|
|
self.paths[node] = subpath_list
|
|
|
|
def getPathStyle(self, node):
|
|
style = node.get("style", "")
|
|
# .get default is not reliable, ensure value is a string
|
|
if not style:
|
|
style = ""
|
|
ret = {}
|
|
# fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1
|
|
for elem in style.split(";"):
|
|
if len(elem):
|
|
try:
|
|
(key, val) = elem.strip().split(":")
|
|
except Exception:
|
|
inkex.errormsg(
|
|
"unparsable element '{1}' in style '{0}'".format(elem, style)
|
|
)
|
|
ret[key] = val
|
|
return ret
|
|
|
|
def convertPath(self, node):
|
|
def object_merge_extrusion_values(extrusion, node):
|
|
|
|
""" Parser for description and ID fields for extrusion parameters.
|
|
This recurse into parents, to inherit values from enclosing
|
|
groups.
|
|
"""
|
|
p = node.getparent()
|
|
if p is not None and p.tag in (inkex.addNS("g", "svg"), "g"):
|
|
object_merge_extrusion_values(extrusion, p)
|
|
|
|
# let the node override inherited values
|
|
rawid = node.get("id", "")
|
|
if rawid is not None:
|
|
zsize = RE_AUTO_ZSIZE_ID.findall(rawid)
|
|
if zsize:
|
|
extrusion["zsize"] = zsize[-1].replace("_", ".")
|
|
# let description contents override id contents.
|
|
for tagname in DESC_TAGS:
|
|
desc_node = node.find("./%s" % tagname)
|
|
if desc_node is not None:
|
|
zsize = RE_AUTO_ZSIZE_DESC.findall(desc_node.text)
|
|
if zsize:
|
|
extrusion["zsize"] = zsize[-1]
|
|
zscale = RE_AUTO_SCALE_DESC.findall(desc_node.text)
|
|
if zscale:
|
|
if "," in zscale[-1]:
|
|
extrusion["scale"] = "[" + zscale[-1] + "]"
|
|
else:
|
|
extrusion["scale"] = zscale[-1]
|
|
zoffset = RE_AUTO_ZOFFSET_DESC.findall(desc_node.text)
|
|
if zoffset:
|
|
extrusion["zoffset"] = zoffset[-1]
|
|
if extrusion["zsize"][0] in ("a", "A"):
|
|
extrusion["neg"] = True
|
|
extrusion["zsize"] = extrusion["zsize"][1:]
|
|
# END object_merge_extrusion_values
|
|
|
|
path = self.paths[node]
|
|
if (path is None) or (len(path) == 0):
|
|
return
|
|
|
|
# Determine which polys contain which
|
|
|
|
contains = [[] for i in range(len(path))]
|
|
contained_by = [[] for i in range(len(path))]
|
|
|
|
for i in range(0, len(path)):
|
|
for j in range(i + 1, len(path)):
|
|
if polyInPoly(path[j][0], path[j][1], path[i][0], path[i][1]):
|
|
# subpath i contains subpath j
|
|
contains[i].append(j)
|
|
# subpath j is contained in subpath i
|
|
contained_by[j].append(i)
|
|
elif polyInPoly(path[i][0], path[i][1], path[j][0], path[j][1]):
|
|
# subpath j contains subpath i
|
|
contains[j].append(i)
|
|
# subpath i is contained in subpath j
|
|
contained_by[i].append(j)
|
|
|
|
# Generate an OpenSCAD module for this path
|
|
rawid = node.get("id", "")
|
|
if (rawid is None) or (rawid == ""):
|
|
id = str(self.pathid) + "x"
|
|
rawid = id
|
|
self.pathid += 1
|
|
else:
|
|
id = re.sub("[^A-Za-z0-9_]+", "", rawid)
|
|
|
|
style = self.getPathStyle(node)
|
|
stroke_width = style.get("stroke-width", "1")
|
|
|
|
# FIXME: works with document units == 'mm', but otherwise untested..
|
|
stroke_width_mm = self.LengthWithUnit(stroke_width, default_unit="mm")
|
|
stroke_width_mm = str(stroke_width_mm * self.userunitsx) # px to mm
|
|
fill_color = style.get("fill", "#FFF")
|
|
if fill_color == "none":
|
|
filled = False
|
|
else:
|
|
filled = True
|
|
if filled is False and style.get("stroke", "none") == "none":
|
|
inkex.errormsg(
|
|
"WARNING: " + rawid + " has fill:none and stroke:none, object ignored."
|
|
)
|
|
return
|
|
|
|
# #### global data for msg_*() functions. ####
|
|
# fold subpaths into a single list of points and index paths.
|
|
prefix = 0
|
|
for i in range(0, len(path)):
|
|
# Skip this subpath if it is contained by another one
|
|
if len(contained_by[i]) != 0:
|
|
continue
|
|
subpath = path[i][0]
|
|
bbox = path[i][1] # [xmin, xmax, ymin, ymax]
|
|
|
|
#
|
|
polycenter = (
|
|
id
|
|
+ "_"
|
|
+ str(prefix)
|
|
+ "_center = [%f,%f]"
|
|
% (
|
|
(bbox[0] + bbox[1]) * .5 - self.cx,
|
|
(bbox[2] + bbox[3]) * .5 - self.cy,
|
|
)
|
|
)
|
|
polypoints = id + "_" + str(prefix) + "_points = ["
|
|
# polypaths = [[0,1,2], [3,4,5]] # this path is two triangle
|
|
polypaths = id + "_" + str(prefix) + "_paths = [["
|
|
if len(contains[i]) == 0:
|
|
# This subpath does not contain any subpaths
|
|
for point in subpath:
|
|
polypoints += "[%f,%f]," % (
|
|
(point[0] - self.cx),
|
|
(point[1] - self.cy),
|
|
)
|
|
polypoints = polypoints[:-1]
|
|
polypoints += "];\n"
|
|
self.f.write(polycenter + ";\n")
|
|
self.f.write(polypoints)
|
|
prefix += 1
|
|
else:
|
|
# This subpath contains other subpaths
|
|
# collect all points into polypoints
|
|
# also collect the indices into polypaths
|
|
for point in subpath:
|
|
polypoints += "[%f,%f]," % (
|
|
(point[0] - self.cx),
|
|
(point[1] - self.cy),
|
|
)
|
|
count = len(subpath)
|
|
for k in range(0, count):
|
|
polypaths += "%d," % (k)
|
|
polypaths = polypaths[:-1] + "],\n\t\t\t\t["
|
|
# The nested paths
|
|
for j in contains[i]:
|
|
for point in path[j][0]:
|
|
polypoints += "[%f,%f]," % (
|
|
(point[0] - self.cx),
|
|
(point[1] - self.cy),
|
|
)
|
|
for k in range(count, count + len(path[j][0])):
|
|
polypaths += "%d," % k
|
|
count += len(path[j][0])
|
|
polypaths = polypaths[:-1] + "],\n\t\t\t\t["
|
|
polypoints = polypoints[:-1]
|
|
polypoints += "];\n"
|
|
polypaths = polypaths[:-7] + "];\n"
|
|
# write the polys and paths
|
|
self.f.write(polycenter + ";\n")
|
|
self.f.write(polypoints)
|
|
self.f.write(polypaths)
|
|
prefix += 1
|
|
# #### end global data for msg_*() functions. ####
|
|
|
|
self.f.write("module poly_" + id + "(h, w, s, res=line_fn)\n{\n")
|
|
# Element is transformed to correct size, so scale is now just for the user to
|
|
# tweak after the fact
|
|
self.f.write(" scale([custom_scale_x, -custom_scale_y, 1]) union()\n {\n")
|
|
|
|
# And add the call to the call list
|
|
# Z-size is set by the overall module parameter
|
|
# unless an extrusion zsize is parsed from the description or ID.
|
|
extrusion = {"zsize": "h", "zoffset": "0", "scale": 100.0, "neg": False}
|
|
if self.options.parsedesc == "true":
|
|
object_merge_extrusion_values(extrusion, node)
|
|
|
|
call_item = "translate ([0,0,%s]) poly_%s(%s, min_line_mm(%s), %s);\n" % (
|
|
extrusion["zoffset"],
|
|
id,
|
|
extrusion["zsize"],
|
|
stroke_width_mm,
|
|
extrusion["scale"],
|
|
)
|
|
|
|
if extrusion["neg"]:
|
|
self.call_list_neg.append(call_item)
|
|
else:
|
|
self.call_list.append(call_item)
|
|
|
|
prefix = 0
|
|
for i in range(0, len(path)):
|
|
|
|
# Skip this subpath if it is contained by another one
|
|
if len(contained_by[i]) != 0:
|
|
continue
|
|
|
|
subpath = path[i][0]
|
|
bbox = path[i][1]
|
|
|
|
if filled and not self.options.force_line:
|
|
|
|
if len(contains[i]) == 0:
|
|
# This subpath does not contain any subpaths
|
|
poly = msg_linear_extrude(id, prefix)
|
|
else:
|
|
# This subpath contains other subpaths
|
|
poly = msg_linear_extrude_by_paths(id, prefix)
|
|
|
|
else: # filled == False -> outline mode
|
|
|
|
if len(contains[i]) == 0:
|
|
# This subpath does not contain any subpaths
|
|
poly = msg_extrude_by_hull(id, prefix)
|
|
else:
|
|
# This subpath contains other subpaths
|
|
poly = msg_extrude_by_hull_and_paths(id, prefix)
|
|
|
|
self.f.write(poly)
|
|
prefix += 1
|
|
|
|
# End the module
|
|
self.f.write(" }\n}\n")
|
|
|
|
def recursivelyTraverseSvg(
|
|
self, aNodeList, matCurrent=Transform(None), parent_visibility="visible"
|
|
):
|
|
|
|
"""
|
|
[ This too is largely lifted from eggbot.py ]
|
|
|
|
Recursively walk the SVG document, building polygon vertex lists
|
|
for each graphical element we support.
|
|
|
|
Rendered SVG elements:
|
|
<circle>, <ellipse>, <line>, <path>, <polygon>, <polyline>, <rect>
|
|
|
|
Supported SVG elements:
|
|
<group>, <use>
|
|
|
|
Ignored SVG elements:
|
|
<defs>, <eggbot>, <metadata>, <namedview>, <pattern>,
|
|
processing directives
|
|
|
|
All other SVG elements trigger an error (including <text>)
|
|
"""
|
|
|
|
for node in aNodeList:
|
|
|
|
# Ignore invisible nodes
|
|
v = node.get("visibility", parent_visibility)
|
|
if v == "inherit":
|
|
v = parent_visibility
|
|
if v == "hidden" or v == "collapse":
|
|
continue
|
|
|
|
s = node.get("style", "")
|
|
if s == "display:none":
|
|
continue
|
|
|
|
# First apply the current matrix transform to this node's transform
|
|
matNew = matCurrent * Transform(node.get("transform"))
|
|
|
|
if node.tag == inkex.addNS("g", "svg") or node.tag == "g":
|
|
|
|
self.recursivelyTraverseSvg(node, matNew, v)
|
|
|
|
elif node.tag == inkex.addNS("use", "svg") or node.tag == "use":
|
|
|
|
# A <use> element refers to another SVG element via an
|
|
# xlink:href="#blah" attribute. We will handle the element by
|
|
# doing an XPath search through the document, looking for the
|
|
# element with the matching id="blah" attribute. We then
|
|
# recursively process that element after applying any necessary
|
|
# (x,y) translation.
|
|
#
|
|
# Notes:
|
|
# 1. We ignore the height and width attributes as they do not
|
|
# apply to path-like elements, and
|
|
# 2. Even if the use element has visibility="hidden", SVG
|
|
# still calls for processing the referenced element. The
|
|
# referenced element is hidden only if its visibility is
|
|
# "inherit" or "hidden".
|
|
|
|
refid = node.get(inkex.addNS("href", "xlink"))
|
|
if not refid:
|
|
continue
|
|
|
|
# [1:] to ignore leading '#' in reference
|
|
path = '//*[@id="%s"]' % refid[1:]
|
|
refnode = node.xpath(path)
|
|
if refnode:
|
|
x = float(node.get("x", "0"))
|
|
y = float(node.get("y", "0"))
|
|
# Note: the transform has already been applied
|
|
if (x != 0) or (y != 0):
|
|
matNew2 = matNew * Transform("translate(%f,%f)" % (x, y))
|
|
else:
|
|
matNew2 = matNew
|
|
v = node.get("visibility", v)
|
|
self.recursivelyTraverseSvg(refnode, matNew2, v)
|
|
|
|
elif node.tag == inkex.addNS("path", "svg"):
|
|
|
|
path_data = node.get("d")
|
|
if path_data:
|
|
self.getPathVertices(path_data, node, matNew)
|
|
|
|
elif node.tag == inkex.addNS("rect", "svg") or node.tag == "rect":
|
|
|
|
# Manually transform
|
|
#
|
|
# <rect x="X" y="Y" width="W" height="H"/>
|
|
#
|
|
# into
|
|
#
|
|
# <path d="MX,Y lW,0 l0,H l-W,0 z"/>
|
|
#
|
|
# I.e., explicitly draw three sides of the rectangle and the
|
|
# fourth side implicitly
|
|
|
|
# Create a path with the outline of the rectangle
|
|
x = float(node.get("x"))
|
|
y = float(node.get("y"))
|
|
w = float(node.get("width", "0"))
|
|
h = float(node.get("height", "0"))
|
|
a = []
|
|
a.append(["M", [x, y]])
|
|
a.append(["l", [w, 0]])
|
|
a.append(["l", [0, h]])
|
|
a.append(["l", [-w, 0]])
|
|
a.append(["Z", []])
|
|
self.getPathVertices(a, node, matNew)
|
|
|
|
elif node.tag == inkex.addNS("line", "svg") or node.tag == "line":
|
|
|
|
# Convert
|
|
#
|
|
# <line x1="X1" y1="Y1" x2="X2" y2="Y2/>
|
|
#
|
|
# to
|
|
#
|
|
# <path d="MX1,Y1 LX2,Y2"/>
|
|
|
|
x1 = float(node.get("x1"))
|
|
y1 = float(node.get("y1"))
|
|
x2 = float(node.get("x2"))
|
|
y2 = float(node.get("y2"))
|
|
if (not x1) or (not y1) or (not x2) or (not y2):
|
|
continue
|
|
a = []
|
|
a.append(["M", [x1, y1]])
|
|
a.append(["L", [x2, y2]])
|
|
self.getPathVertices(a, node, matNew)
|
|
|
|
elif node.TAG in ["polygon", "polyline"]:
|
|
|
|
# Convert
|
|
#
|
|
# <polyline points="x1,y1 x2,y2 x3,y3 [...]"/>
|
|
#
|
|
# to
|
|
#
|
|
# <path d="Mx1,y1 Lx2,y2 Lx3,y3 [...]"/>
|
|
#
|
|
# Note: we ignore polylines with no points
|
|
|
|
pl = node.get("points", "").strip()
|
|
if not pl:
|
|
continue
|
|
|
|
pa = pl.split()
|
|
d = "".join(
|
|
[
|
|
"M " + pa[i] if i == 0 else " L " + pa[i]
|
|
for i in range(0, len(pa))
|
|
]
|
|
)
|
|
d = []
|
|
first = True
|
|
for part in pl.split():
|
|
x, y = part.split(",")
|
|
coords = [float(x), float(y)]
|
|
if first:
|
|
d.append(["M", coords])
|
|
first = False
|
|
else:
|
|
d.append(["L", coords])
|
|
if node.TAG == "polygon":
|
|
d.append(["Z", []])
|
|
self.getPathVertices(d, node, matNew)
|
|
|
|
elif (
|
|
node.tag == inkex.addNS("ellipse", "svg")
|
|
or node.tag == "ellipse"
|
|
or node.tag == inkex.addNS("circle", "svg")
|
|
or node.tag == "circle"
|
|
):
|
|
|
|
# Convert circles and ellipses to a path with two 180 degree
|
|
# arcs. In general (an ellipse), we convert
|
|
#
|
|
# <ellipse rx="RX" ry="RY" cx="X" cy="Y"/>
|
|
#
|
|
# to
|
|
#
|
|
# <path d="MX1,CY A RX,RY 0 1 0 X2,CY A RX,RY 0 1 0 X1,CY"/>
|
|
#
|
|
# where
|
|
#
|
|
# X1 = CX - RX
|
|
# X2 = CX + RX
|
|
#
|
|
# Note: ellipses or circles with a radius attribute of value 0
|
|
# are ignored
|
|
|
|
if node.tag == inkex.addNS("ellipse", "svg") or node.tag == "ellipse":
|
|
rx = float(node.get("rx", "0"))
|
|
ry = float(node.get("ry", "0"))
|
|
else:
|
|
rx = float(node.get("r", "0"))
|
|
ry = rx
|
|
if rx == 0 or ry == 0:
|
|
continue
|
|
|
|
cx = float(node.get("cx", "0"))
|
|
cy = float(node.get("cy", "0"))
|
|
x1 = cx - rx
|
|
x2 = cx + rx
|
|
d = [
|
|
["M", (x1, cy)],
|
|
["A", (rx, ry, 0, 1, 0, x2, cy)],
|
|
["A", (rx, ry, 0, 1, 0, x1, cy)],
|
|
]
|
|
self.getPathVertices(d, node, matNew)
|
|
|
|
elif node.tag == inkex.addNS("pattern", "svg") or node.tag == "pattern":
|
|
pass
|
|
|
|
elif node.tag == inkex.addNS("metadata", "svg") or node.tag == "metadata":
|
|
pass
|
|
|
|
elif node.tag == inkex.addNS("defs", "svg") or node.tag == "defs":
|
|
pass
|
|
|
|
elif node.tag == inkex.addNS("desc", "svg") or node.tag == "desc":
|
|
pass
|
|
|
|
elif (
|
|
node.tag == inkex.addNS("namedview", "sodipodi")
|
|
or node.tag == "namedview"
|
|
):
|
|
pass
|
|
|
|
elif node.tag == inkex.addNS("eggbot", "svg") or node.tag == "eggbot":
|
|
pass
|
|
|
|
elif node.tag == inkex.addNS("text", "svg") or node.tag == "text":
|
|
texts = []
|
|
plaintext = ""
|
|
for tnode in node.iterfind(".//"): # all subtree
|
|
if tnode is not None and tnode.text is not None:
|
|
texts.append(tnode.text)
|
|
if len(texts):
|
|
plaintext = "', '".join(texts).encode("latin-1")
|
|
inkex.errormsg('Warning: text "%s"' % plaintext)
|
|
inkex.errormsg(
|
|
"Warning: unable to draw text, please convert it to a path first."
|
|
)
|
|
|
|
elif node.tag == inkex.addNS("title", "svg") or node.tag == "title":
|
|
pass
|
|
|
|
elif node.tag == inkex.addNS("image", "svg") or node.tag == "image":
|
|
if "image" not in self.warnings:
|
|
inkex.errormsg(
|
|
gettext.gettext(
|
|
"Warning: unable to draw bitmap images; please convert them to line art first. "
|
|
'Consider using the "Trace bitmap..." tool of the "Path" menu. Mac users please '
|
|
"note that some X11 settings may cause cut-and-paste operations to paste in bitmap copies."
|
|
)
|
|
)
|
|
self.warnings["image"] = 1
|
|
|
|
elif node.tag == inkex.addNS("pattern", "svg") or node.tag == "pattern":
|
|
pass
|
|
|
|
elif (
|
|
node.tag == inkex.addNS("radialGradient", "svg")
|
|
or node.tag == "radialGradient"
|
|
):
|
|
# Similar to pattern
|
|
pass
|
|
|
|
elif (
|
|
node.tag == inkex.addNS("linearGradient", "svg")
|
|
or node.tag == "linearGradient"
|
|
):
|
|
# Similar in pattern
|
|
pass
|
|
|
|
elif node.tag == inkex.addNS("style", "svg") or node.tag == "style":
|
|
# This is a reference to an external style sheet and not the
|
|
# value of a style attribute to be inherited by child elements
|
|
pass
|
|
|
|
elif node.tag == inkex.addNS("cursor", "svg") or node.tag == "cursor":
|
|
pass
|
|
|
|
elif (
|
|
node.tag == inkex.addNS("color-profile", "svg")
|
|
or node.tag == "color-profile"
|
|
):
|
|
# Gamma curves, color temp, etc. are not relevant to single
|
|
# color output
|
|
pass
|
|
|
|
elif not isinstance(node.tag, (str, bytes)):
|
|
# This is likely an XML processing instruction such as an XML
|
|
# comment. lxml uses a function reference for such node tags
|
|
# and as such the node tag is likely not a printable string.
|
|
# Further, converting it to a printable string likely won't
|
|
# be very useful.
|
|
pass
|
|
|
|
else:
|
|
inkex.errormsg(
|
|
"Warning: unable to draw object <%s>, please convert it to a path first."
|
|
% node.tag
|
|
)
|
|
pass
|
|
|
|
def recursivelyGetEnclosingTransform(self, node):
|
|
|
|
"""
|
|
Determine the cumulative transform which node inherits from
|
|
its chain of ancestors.
|
|
"""
|
|
node = node.getparent()
|
|
if node is not None:
|
|
parent_transform = self.recursivelyGetEnclosingTransform(node)
|
|
node_transform = node.get("transform", None)
|
|
if node_transform is None:
|
|
return parent_transform
|
|
else:
|
|
tr = Transform(node_transform)
|
|
if parent_transform is None:
|
|
return tr
|
|
else:
|
|
return parent_transform * tr
|
|
else:
|
|
return self.docTransform
|
|
|
|
def effect(self):
|
|
# Viewbox handling
|
|
self.handleViewBox()
|
|
|
|
# First traverse the document (or selected items), reducing
|
|
# everything to line segments. If working on a selection,
|
|
# then determine the selection's bounding box in the process.
|
|
# (Actually, we just need to know its extrema on the x-axis.)
|
|
|
|
if self.options.ids:
|
|
# Traverse the selected objects
|
|
for id in self.options.ids:
|
|
transform = self.recursivelyGetEnclosingTransform(self.svg.selected[id])
|
|
self.recursivelyTraverseSvg([self.svg.selected[id]], transform)
|
|
else:
|
|
# Traverse the entire document building new, transformed paths
|
|
self.recursivelyTraverseSvg(self.document.getroot(), self.docTransform)
|
|
|
|
# Determine the center of the drawing's bounding box
|
|
self.cx = self.xmin + (self.xmax - self.xmin) / 2.0
|
|
self.cy = self.ymin + (self.ymax - self.ymin) / 2.0
|
|
|
|
# Determine which polygons lie entirely within other polygons
|
|
try:
|
|
self.options.fname = self.options.fname.format(**{"NAME": self.basename})
|
|
if os.sep not in self.options.fname and "PWD" in os.environ:
|
|
# current working directory of an extension seems to be the extension dir.
|
|
# Workaround using PWD, if available...
|
|
self.options.fname = os.environ["PWD"] + "/" + self.options.fname
|
|
scad_fname = os.path.expanduser(self.options.fname)
|
|
if "/" != os.sep:
|
|
scad_fname = scad_fname.replace("/", os.sep)
|
|
self.f = open(scad_fname, "w")
|
|
|
|
self.f.write(
|
|
"// Generated by inkscape %s + inkscape-paths2openscad %s\n"
|
|
% (self.inkscape_version, VERSION)
|
|
)
|
|
self.f.write('// %s from "%s.svg"\n' % (time.ctime(), self.basename))
|
|
|
|
# for use in options.fname basename is derived from the sodipodi_docname by
|
|
# stripping the svg extension - or if there is no sodipodi_docname basename is 'inkscape'.
|
|
# for use in scadviewcmd, scad2stlcmd and stlpostcmd basename is rederived from
|
|
# options.fname by stripping an scad extension.
|
|
self.basename = re.sub(r"\.scad", "", scad_fname, flags=re.I)
|
|
|
|
self.f.write(
|
|
"""
|
|
// Module names are of the form poly_<inkscape-path-id>(). As a result,
|
|
// you can associate a polygon in this OpenSCAD program with the corresponding
|
|
// SVG element in the Inkscape document by looking for the XML element with
|
|
// the attribute id=\"inkscape-path-id\".
|
|
|
|
// fudge value is used to ensure that subtracted solids are a tad taller
|
|
// in the z dimension than the polygon being subtracted from. This helps
|
|
// keep the resulting .stl file manifold.
|
|
fudge = 0.1;
|
|
"""
|
|
)
|
|
if self.options.chamfer < 0.001:
|
|
self.options.chamfer = None
|
|
|
|
self.f.write("user_unit_scale_x = %s;\n" % (self.userunitsx))
|
|
self.f.write("user_unit_scale_y = %s;\n" % (self.userunitsy))
|
|
self.f.write("custom_scale_x = 1;\n")
|
|
self.f.write("custom_scale_y = 1;\n")
|
|
|
|
# writeout users parameters
|
|
self.f.write("zsize = %s;\n" % (self.options.zsize))
|
|
self.f.write("line_fn = %d;\n" % (self.options.line_fn))
|
|
if self.options.chamfer:
|
|
self.f.write("chamfer = %s;\n" % (self.options.chamfer))
|
|
self.f.write("chamfer_fn = %d;\n" % (self.options.chamfer_fn))
|
|
self.f.write("min_line_width = %s;\n" % (self.options.min_line_width))
|
|
self.f.write(
|
|
"line_width_scale = %s;\n" % (self.options.line_width_scale_perc * 0.01)
|
|
)
|
|
self.f.write(
|
|
"function min_line_mm(w) = max(min_line_width, w * line_width_scale) * %g;\n\n"
|
|
% self.userunitsx
|
|
)
|
|
|
|
for key in self.paths:
|
|
self.f.write("\n")
|
|
self.convertPath(key)
|
|
|
|
if self.options.chamfer:
|
|
self.f.write(
|
|
"""
|
|
module chamfer_sphere(rad=chamfer, res=chamfer_fn)
|
|
{
|
|
if(res <= 4)
|
|
{
|
|
// octaeder: 3 sided faces = 8
|
|
polyhedron(
|
|
points = [ [.0, .0, rad], [.0, .0, -rad], [ rad, .0, .0], [-rad, .0, .0], [.0, rad, .0], [.0, -rad, .0] ],
|
|
faces = [ [4, 2, 0], [3, 4, 0], [5, 3, 0], [2, 5, 0], [5, 2, 1], [3, 5, 1], [4, 3, 1], [2 , 4, 1] ]);
|
|
}
|
|
else
|
|
{
|
|
sphere(r=rad, center=true, $fn=res);
|
|
}
|
|
}
|
|
"""
|
|
)
|
|
|
|
# Come up with a name for the module based on the file name.
|
|
name = os.path.splitext(os.path.basename(self.options.fname))[0]
|
|
# Remove all punctuation except underscore.
|
|
badchars = string.punctuation.replace("_", "") + " "
|
|
name = re.sub("[" + badchars + "]", "_", name)
|
|
|
|
self.f.write("\nmodule %s(h)\n{\n" % name)
|
|
mi = ""
|
|
if self.options.chamfer:
|
|
mi = " "
|
|
self.f.write(" minkowski()\n {\n")
|
|
|
|
# Now output the list of modules to call
|
|
self.f.write(
|
|
"%s difference()\n%s {\n%s union()\n%s {\n" % (mi, mi, mi, mi)
|
|
)
|
|
for call in self.call_list:
|
|
self.f.write("%s %s" % (mi, call))
|
|
self.f.write("%s }\n%s union()\n%s {\n" % (mi, mi, mi))
|
|
for call in self.call_list_neg:
|
|
self.f.write("%s %s" % (mi, call))
|
|
self.f.write("%s }\n%s }\n" % (mi, mi))
|
|
if self.options.chamfer:
|
|
self.f.write(" chamfer_sphere();\n }\n")
|
|
|
|
# The module that calls all the other ones.
|
|
if self.options.stlmodule == "true":
|
|
self.f.write("}\n\n//%s(zsize);\n" % (name))
|
|
else:
|
|
self.f.write("}\n\n%s(zsize);\n" % (name))
|
|
self.f.close()
|
|
|
|
except IOError as e:
|
|
inkex.errormsg("Unable to write file " + self.options.fname)
|
|
inkex.errormsg("ERROR: " + str(e))
|
|
|
|
if self.options.scadview == "true":
|
|
pidfile = os.path.join(tempfile.gettempdir(), "paths2openscad.pid")
|
|
running = False
|
|
cmd = self.options.scadviewcmd.format(
|
|
**{"SCAD": scad_fname, "NAME": self.basename}
|
|
)
|
|
try:
|
|
pfile=open(pidfile)
|
|
m = re.match(r"(\d+)\s+(.*)", pfile.read())
|
|
pfile.close()
|
|
oldpid = int(m.group(1))
|
|
oldcmd = m.group(2)
|
|
# print >> sys.stderr, "pid {1} seen in {0}".format(pidfile, oldpid)
|
|
# print >> sys.stderr, "cmd {0}, oldcmd {1}".format(cmd, oldcmd)
|
|
if cmd == oldcmd:
|
|
# we found a pidfile and the cmd in there is still identical.
|
|
# If we change the filename in the inkscape extension gui, the cmd differs, and
|
|
# the still running openscad would not pick up our changes.
|
|
# If the command is identical, we check if the pid in the pidfile is alive.
|
|
# If so, we assume, the still running openscad will pick up the changes.
|
|
#
|
|
# WARNING: too much magic here. We cannot really test, if the last assumption holds.
|
|
# Comment out the next line to always start a new instance of openscad.
|
|
running = IsProcessRunning(oldpid)
|
|
# print >> sys.stderr, "running {0}".format(running)
|
|
except Exception:
|
|
pass
|
|
if not running:
|
|
import subprocess
|
|
|
|
try:
|
|
tty = open("/dev/tty", "w")
|
|
except Exception:
|
|
tty = subprocess.PIPE
|
|
try:
|
|
proc = subprocess.Popen(
|
|
cmd, shell=True, stdin=tty, stdout=tty, stderr=tty
|
|
)
|
|
except OSError as e:
|
|
raise OSError("%s failed: errno=%d %s" % (cmd, e.errno, e.strerror))
|
|
try:
|
|
pfile = open(pidfile, "w")
|
|
pfile.write(str(proc.pid) + "\n" + cmd + "\n")
|
|
pfile.close()
|
|
|
|
except Exception:
|
|
pass
|
|
else:
|
|
# BUG alert:
|
|
# If user changes the file viewed in openscad (save with different name, re-open that name
|
|
# without closing openscad, again, the still running openscad does not
|
|
# pick up the changes. and we have no way to tell the difference if it did.
|
|
pass
|
|
|
|
if self.options.scad2stl == "true" or self.options.stlpost == "true":
|
|
stl_fname = self.basename + ".stl"
|
|
cmd = self.options.scad2stlcmd.format(
|
|
**{"SCAD": scad_fname, "STL": stl_fname, "NAME": self.basename}
|
|
)
|
|
try:
|
|
os.unlink(stl_fname)
|
|
except Exception:
|
|
pass
|
|
|
|
import subprocess
|
|
|
|
try:
|
|
proc = subprocess.Popen(
|
|
cmd,
|
|
shell=True,
|
|
stdin=subprocess.PIPE,
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE,
|
|
)
|
|
except OSError as e:
|
|
raise OSError(
|
|
"{0} failed: errno={1} {2}".format(cmd, e.errno, e.strerror)
|
|
)
|
|
stdout, stderr = proc.communicate()
|
|
|
|
len = -1
|
|
try:
|
|
len = os.path.getsize(stl_fname)
|
|
except Exception:
|
|
pass
|
|
if len < 1000:
|
|
inkex.errormsg(
|
|
"CMD: {} WARNING: {} is very small: {} bytes.".format(
|
|
cmd, stl_fname, len
|
|
)
|
|
)
|
|
inkex.errormsg("= " * 24)
|
|
inkex.errormsg("STDOUT:\n{}".format(stdout))
|
|
inkex.errormsg("= " * 24)
|
|
inkex.errormsg("STDERR:\n{}".format(stderr))
|
|
inkex.errormsg("= " * 24)
|
|
if len <= 0: # something is wrong. better stop here
|
|
self.options.stlpost = "false"
|
|
stdout.close()
|
|
stderr.close()
|
|
if self.options.stlpost == "true":
|
|
cmd = self.options.stlpostcmd.format(
|
|
**{"STL": self.basename + ".stl", "NAME": self.basename}
|
|
)
|
|
try:
|
|
tty = open("/dev/tty", "w")
|
|
except Exception:
|
|
tty = subprocess.PIPE
|
|
|
|
try:
|
|
proc = subprocess.Popen(
|
|
cmd, shell=True, stdin=tty, stdout=tty, stderr=tty
|
|
)
|
|
except OSError as e:
|
|
raise OSError("%s failed: errno=%d %s" % (cmd, e.errno, e.strerror))
|
|
|
|
stdout, stderr = proc.communicate()
|
|
if stdout or stderr:
|
|
inkex.errmsg("CMD: {}".format(cmd))
|
|
inkex.errormsg("= " * 24)
|
|
if stdout:
|
|
inkex.errmsg("STDOUT: {}".format(stdout))
|
|
inkex.errormsg("= " * 24)
|
|
if stderr:
|
|
inkex.errmsg("STDERR: {}".format(stderr))
|
|
inkex.errormsg("= " * 24)
|
|
stdout.close()
|
|
stderr.close()
|
|
|
|
OpenSCAD().run()
|