98 lines
3.6 KiB
Python
98 lines
3.6 KiB
Python
#***************************************************************************
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#* (c) Yorik van Havre (yorik@uncreated.net) 2015 *
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#* *
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#* This file is part of the FreeCAD CAx development system. *
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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 Lesser General Public License (LGPL) *
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#* as published by the Free Software Foundation; either version 2 of *
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#* the License, or (at your option) any later version. *
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#* for detail see the LICENCE text file. *
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#* *
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#* FreeCAD 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 Lesser General Public License for more details. *
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#* *
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#* You should have received a copy of the GNU Library General Public *
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#* License along with FreeCAD; if not, write to the Free Software *
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#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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#* USA *
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#* *
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#***************************************************************************/
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'''
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This is an preprocessor to read gcode files produced from slic3r.
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'''
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import os, Path
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import FreeCAD
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# to distinguish python built-in open function from the one declared below
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if open.__module__ == '__builtin__':
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pythonopen = open
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def open(filename):
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"called when freecad opens a file."
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docname = os.path.splitext(os.path.basename(filename))[0]
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doc = FreeCAD.newDocument(docname)
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insert(filename,doc.Name)
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def insert(filename,docname):
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"called when freecad imports a file"
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gfile = pythonopen(filename)
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gcode = gfile.read()
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gfile.close()
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gcode = parse(gcode)
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doc = FreeCAD.getDocument(docname)
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obj = doc.addObject("Path::Feature","Path")
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path = Path.Path(gcode)
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obj.Path = path
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def parse(inputstring):
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"parse(inputstring): returns a parsed output string"
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print "preprocessing..."
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# split the input by line
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lines = inputstring.split("\n")
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output = ""
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lastcommand = None
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for l in lines:
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# remove any leftover trailing and preceding spaces
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l = l.strip()
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if not l:
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# discard empty lines
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continue
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if l[0].upper() in ["N"]:
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# remove line numbers
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l = l.split(" ",1)[1]
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if ";" in l:
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# replace ; comments with ()
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l = l.replace(";","(")
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l = l+")"
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if l[0].upper() in ["G","M","("]:
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# found a G or M command: we store it
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output += l + "\n"
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last = l[0].upper()
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for c in l[1:]:
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if not c.isdigit():
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break
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else:
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last += c
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lastcommand = last
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elif lastcommand:
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# no G or M command: we repeat the last one
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output += lastcommand + " " + l + "\n"
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print "done preprocessing."
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return output
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print __name__ + " gcode preprocessor loaded."
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