conv.py

#!/usr/bin/freecadcmd
# !/Applications/FreeCAD.app/Contents/MacOS/FreeCADCmd
'''
Original:
http://jordan.husney.com/archives/2013/07/converting_cad_files_to_stl_us.php
Repaired:
J. R.I.B.-Wein, Open Source Ecology Germany
'''

# $ $(PYTHON) step_stl.py input.step output.stl  #<-- yet another problem as the PYTHON was missing! now repaired, $(PYTHON) usually is simply 'python' or '/usr/bin/python' if not on the SYSTEM PATH.

# You can even use it in a more general way, freecad is very powerful:
# $ python freecad_convert.py path/to/infile.<source_ending> path/to/outfile.<target_ending>

'''
#Original instructions stated to overwrite this Variable:
$ export DYLD_FALLBACK_LIBRARY_PATH=\
/Applications/FreeCAD.app/Contents/Frameworks/lib:\
$DYLD_FALLBACK_LIBRARY_PATH
But it failed, because the script did not use the Variable. Now it's repaired. See below:
'''

# Rewritten by OSE Germany, J.R.I.B.-Wein:
FREECAD_LIB_PATH = 'F:/FreeCAD/bin'  # path to your FreeCAD.so or FreeCAD.dll file

# Can be overwritten or added to from the command line via:
# ($ stands for 'bash', eff. command line, and has to be omitted!)

# ADD ANOTHER PATH:
# $ export FREECAD_LIB_PATH = '<path_to_lib_FreeCAD.so_or_.dll>':$FREECAD_LIB_PATH

# OVERWRITE:
# $ export FREECAD_LIB_PATH = '<path_to_lib_FreeCAD.so_or_.dll>'


# CAN ALSO BE GIVEN WHILE EXECUTING THIS SCRIPT:
# $ python <path/to/script_for_bash_conversion>.py


import sys

sys.path.append(FREECAD_LIB_PATH)  # <-- added, otherwise FreeCAD is not found
import os
import FreeCAD
import Part
import Mesh

# import Blender                 #<-- kept as a reminder for how well those two open source gems interact


# The original author wrote this script. The syntax was figured out by recording and evaluating some macros in
# FreeCAD. Thanks open source movement.


in_f, out_f = sys.argv[1], sys.argv[2]  # <-- repaired, out of bounds
in_fn, in_ext = os.path.splitext(in_f)
out_fn, out_ext = os.path.splitext(out_f)
print(in_ext, " -> ", out_ext)

mesh_formats = ['.dae', '.stl', '.obj']


def main():
    shape = Part.Shape()
    # shape_formats = ['.brp', '.igs', '.stp']
    if in_ext in mesh_formats:
        print("Opening mesh file: ", in_f)
        Mesh.open(in_f)
        o = FreeCAD.getDocument("Unnamed").findObjects()[0]
        # print("dir: ", dir(o))
        if out_ext in mesh_formats:
            print("Exporting to mesh file: ", out_f)
            Mesh.export([o], out_f)
        else:
            # TODO This is not optimizing the resulting amount of faces!
            # see http://www.freecadweb.org/wiki/index.php?title=Mesh_to_Part
            shape.makeShapeFromMesh(o.Mesh.Topology, 0.05)  # tolerance for sewing
            exportParametric(shape, out_f, out_ext)
    elif out_ext in mesh_formats:
        print("Opening parametric file: ", in_f)
        Part.open(in_f)
        o = FreeCAD.getDocument("Unnamed").findObjects()[0]
        print("Exporting to mesh file: ", out_f)
        Mesh.export([o], out_f)
    else:
        # Parametric -> Parametric
        print("Opening parametric file: ", in_f)
        shape.read(in_f)
        exportParametric(shape, out_f, out_ext)


def exportParametric(shape, out_f, out_ext):
    print("Exporting to parametric file: ", out_f)
    if out_ext == '.brp':
        shape.exportBrep(out_f)
    elif out_ext == '.igs':
        shape.exportIges(out_f)
    elif out_ext == '.stl':
        shape.exportStl(out_f)
    elif out_ext == '.stp':
        shape.exportStep(out_f)
    else:
        print("Export to '%s' not supported." % (out_ext))


main()

'''def import_fcstd(filename): try: import FreeCAD except ValueError: Blender.Draw.PupMenu('Error%t|FreeCAD library 
not found. Please check the FREECADPATH variable in the import script is correct') else: scene = 
Blender.Scene.GetCurrent() import Part doc = FreeCAD.open(filename) objects = doc.Objects for ob in objects: if 
ob.Type[:4] == 'Part': shape = ob.Shape if shape.Faces: mesh = Blender.Mesh.New() rawdata = shape.tessellate(1) for v 
in rawdata[0]: mesh.verts.append((v.x,v.y,v.z)) for f in rawdata[1]: mesh.faces.append.append(f) scene.objects.new(
mesh,ob.Name) Blender.Redraw() '''


def main():
    pass


#   Blender.Window.FileSelector(import_fcstd, 'IMPORT FCSTD',
#                       Blender.sys.makename(ext='.fcstd'))

# This lets you import the script without running it
if __name__ == '__main__':
    main()

# It's used like this:

# $(PYTHON) step_stl.py input.step output.stl  #<-- yet another problem as the PYTHON was missing! now repaired,
# $(PYTHON) usually is simply 'python' or '/usr/bin/python' if not on the SYSTEM PATH.