#*************************************************************************** #* * #* Copyright (c) 2012 Sebastian Hoogen * #* * #* This program is free software; you can redistribute it and/or modify * #* it under the terms of the GNU Lesser General Public License (LGPL) * #* as published by the Free Software Foundation; either version 2 of * #* the License, or (at your option) any later version. * #* for detail see the LICENCE text file. * #* * #* This program is distributed in the hope that it will be useful, * #* but WITHOUT ANY WARRANTY; without even the implied warranty of * #* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * #* GNU Library General Public License for more details. * #* * #* You should have received a copy of the GNU Library General Public * #* License along with this program; if not, write to the Free Software * #* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * #* USA * #* * #*************************************************************************** __title__="FreeCAD OpenSCAD Workbench - Utility Fuctions" __author__ = "Sebastian Hoogen" __url__ = ["http://www.freecadweb.org"] ''' This Script includes various pyhton helper functions that are shared across the module ''' def translate(context,text): "convenience function for Qt translator" from PySide import QtGui return QtGui.QApplication.translate(context, text, None, \ QtGui.QApplication.UnicodeUTF8) try: import FreeCAD BaseError = FreeCAD.Base.FreeCADError except ImportError,AttributeError: BaseError = RuntimeError class OpenSCADError(BaseError): def __init__(self,value): self.value= value #def __repr__(self): # return self.msg def __str__(self): return repr(self.value) def searchforopenscadexe(): import os,sys,subprocess if sys.platform == 'win32': testpaths = [os.path.join(os.environ.get('Programfiles(x86)','C:'),\ 'OpenSCAD\\openscad.exe')] if 'ProgramW6432' in os.environ: testpaths.append(os.path.join(os.environ.get('ProgramW6432','C:')\ ,'OpenSCAD\\openscad.exe')) for testpath in testpaths: if os.path.isfile(testpath): return testpath elif sys.platform == 'darwin': ascript = ('tell application "Finder"\n' 'POSIX path of (application file id "org.openscad.OpenSCAD"' 'as alias)\n' 'end tell') p1=subprocess.Popen(['osascript','-'],stdin=subprocess.PIPE,\ stdout=subprocess.PIPE,stderr=subprocess.PIPE) stdout,stderr = p1.communicate(ascript) if p1.returncode == 0: opathl=stdout.split('\n') if len(opathl) >=1: return opathl[0]+'Contents/MacOS/OpenSCAD' #test the default path testpath="/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD" if os.path.isfile(testpath): return testpath else: #unix p1=subprocess.Popen(['which','openscad'],stdout=subprocess.PIPE) if p1.wait() == 0: opath=p1.stdout.read().split('\n')[0] return opath def workaroundforissue128needed(): '''sets the import path depending on the OpenSCAD Verion for versions <= 2012.06.23 to the current working dir for versions above to the inputfile dir see https://github.com/openscad/openscad/issues/128''' vdate=getopenscadversion().split('-')[0] vdate=vdate.split(' ')[2].split('.') year,mon=int(vdate[0]),int(vdate[1]) return (year<2012 or (year==2012 and (mon <6 or (mon == 6 and \ (len(vdate)<3 or int(vdate[2]) <=23))))) #ifdate=int(vdate[0])+(int(vdate[1])-1)/12.0 #if len(vdate)>2: # fdate+=int((vdate[2])-1)/12.0/31.0 #return fdate < 2012.4759 def getopenscadversion(osfilename=None): import os,subprocess,time if not osfilename: import FreeCAD osfilename = FreeCAD.ParamGet(\ "User parameter:BaseApp/Preferences/Mod/OpenSCAD").\ GetString('openscadexecutable') if osfilename and os.path.isfile(osfilename): p=subprocess.Popen([osfilename,'-v'],\ stdout=subprocess.PIPE,stderr=subprocess.PIPE,universal_newlines=True) p.wait() stdout=p.stdout.read().strip() stderr=p.stderr.read().strip() return (stdout or stderr) def newtempfilename(): import os,time formatstr='fc-%05d-%06d-%06d' count = 0 while True: count+=1 yield formatstr % (os.getpid(),int(time.time()*100) % 1000000,count) tempfilenamegen=newtempfilename() def callopenscad(inputfilename,outputfilename=None,outputext='csg',keepname=False): '''call the open scad binary returns the filename of the result (or None), please delete the file afterwards''' import FreeCAD,os,subprocess,tempfile,time def check_output2(*args,**kwargs): kwargs.update({'stdout':subprocess.PIPE,'stderr':subprocess.PIPE}) p=subprocess.Popen(*args,**kwargs) stdoutd,stderrd = p.communicate() if p.returncode != 0: raise OpenSCADError('%s %s\n' % (stdoutd.strip(),stderrd.strip())) #raise Exception,'stdout %s\n stderr%s' %(stdoutd,stderrd) if stderrd.strip(): FreeCAD.Console.PrintWarning(stderrd+u'\n') if stdoutd.strip(): FreeCAD.Console.PrintMessage(stdoutd+u'\n') return stdoutd osfilename = FreeCAD.ParamGet(\ "User parameter:BaseApp/Preferences/Mod/OpenSCAD").\ GetString('openscadexecutable') if osfilename and os.path.isfile(osfilename): if not outputfilename: dir1=tempfile.gettempdir() if keepname: outputfilename=os.path.join(dir1,'%s.%s' % (os.path.split(\ inputfilename)[1].rsplit('.',1)[0],outputext)) else: outputfilename=os.path.join(dir1,'%s.%s' % \ (tempfilenamegen.next(),outputext)) check_output2([osfilename,'-o',outputfilename, inputfilename]) return outputfilename else: raise OpenSCADError('OpenSCAD executeable unavailable') def callopenscadstring(scadstr,outputext='csg'): '''create a tempfile and call the open scad binary returns the filename of the result (or None), please delete the file afterwards''' import os,tempfile,time dir1=tempfile.gettempdir() inputfilename=os.path.join(dir1,'%s.scad' % tempfilenamegen.next()) inputfile = open(inputfilename,'w') inputfile.write(scadstr) inputfile.close() outputfilename = callopenscad(inputfilename,outputext=outputext,\ keepname=True) os.unlink(inputfilename) return outputfilename def reverseimporttypes(): '''allows to search for supported filetypes by module''' def getsetfromdict(dict1,index): if index in dict1: return dict1[index] else: set1=set() dict1[index]=set1 return set1 importtypes={} import FreeCAD for key,value in FreeCAD.getImportType().iteritems(): if type(value) is str: getsetfromdict(importtypes,value).add(key) else: for vitem in value: getsetfromdict(importtypes,vitem).add(key) return importtypes def fcsubmatrix(m): """Extracts the 3x3 Submatrix from a freecad Matrix Object as a list of row vectors""" return [[m.A11,m.A12,m.A13],[m.A21,m.A22,m.A23],[m.A31,m.A32,m.A33]] def multiplymat(l,r): """multiply matrices given as lists of row vectors""" rt=zip(*r) #transpose r mat=[] for y in range(len(rt)): mline=[] for x in range(len(l)): mline.append(sum([le*re for le,re in zip(l[y],rt[x])])) mat.append(mline) return mat def isorthogonal(submatrix,precision=4): """checking if 3x3 Matrix is ortogonal (M*Transp(M)==I)""" prod=multiplymat(submatrix,zip(*submatrix)) return [[round(f,precision) for f in line] \ for line in prod]==[[1,0,0],[0,1,0],[0,0,1]] def detsubmatrix(s): """get the determinant of a 3x3 Matrix given as list of row vectors""" return s[0][0]*s[1][1]*s[2][2]+s[0][1]*s[1][2]*s[2][0]+\ s[0][2]*s[1][0]*s[2][1]-s[2][0]*s[1][1]*s[0][2]-\ s[2][1]*s[1][2]*s[0][0]-s[2][2]*s[1][0]*s[0][1] def isspecialorthogonalpython(submat,precision=4): return isorthogonal(submat,precision) and round(detsubmatrix(submat),precision)==1 def isrotoinversionpython(submat,precision=4): return isorthogonal(submat,precision) and round(detsubmatrix(submat),precision)==-1 def isspecialorthogonal(mat,precision=4): return abs(mat.submatrix(3).isOrthogonal(10**(-precision))-1.0) < \ 10**(-precision) and \ abs(mat.submatrix(3).determinant()-1.0) < 10**(-precision) def decomposerotoinversion(m,precision=4): import FreeCAD rmat = [[round(f,precision) for f in line] for line in fcsubmatrix(m)] cmat = FreeCAD.Matrix() if rmat ==[[-1,0,0],[0,1,0],[0,0,1]]: cmat.scale(-1,1,1) return m*cmat,FreeCAD.Vector(1) elif rmat ==[[1,0,0],[0,-1,0],[0,0,1]]: cmat.scale(1,-1,1) return m*cmat, FreeCAD.Vector(0,1) elif rmat ==[[1,0,0],[0,1,0],[0,0,-1]]: cmat.scale(1,1,-1) return m*cmat, FreeCAD.Vector(0,0,1) else: cmat.scale(1,1,-1) return m*cmat, FreeCAD.Vector(0,0,1) def mirror2mat(nv,bv): import FreeCAD """calculate the transformation matrix of a mirror feature""" mbef=FreeCAD.Matrix() mbef.move(bv * -1) maft=FreeCAD.Matrix() maft.move(bv) return maft*vec2householder(nv)*mbef def vec2householder(nv): """calculated the householder matrix for a given normal vector""" import FreeCAD lnv=nv.dot(nv) l=2/lnv if lnv > 0 else 0 hh=FreeCAD.Matrix(nv.x*nv.x*l,nv.x*nv.y*l,nv.x*nv.z*l,0,\ nv.y*nv.x*l,nv.y*nv.y*l,nv.y*nv.z*l,0,\ nv.z*nv.x*l,nv.z*nv.y*l,nv.z*nv.z*l,0,0,0,0,0) return FreeCAD.Matrix()-hh def angneg(d): return d if (d <= 180.0) else (d-360) def shorthexfloat(f): s=f.hex() mantisse, exponent = f.hex().split('p',1) return '%sp%s' % (mantisse.rstrip('0'),exponent) def comparerotations(r1,r2): import FreeCAD '''compares two rotations a value of zero means that they are identical''' r2c=FreeCAD.Rotation(r2) r2c.invert() return r1.multiply(r2c).Angle def findbestmatchingrotation(r1): import FreeCAD vangl = \ (1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 11.25, 12.0, 13.0, 14.0, 15.0, 16.0, (180.0/11.0), 17.0, 18.0, 19.0, 20.0, 21.0, 22.0, 22.5, 23.0, 24.0, 25.0, 26.0, 27.0, 28.0, 29.0, 30.0, 31.0, 32.0, (360.0/11.0), 33.0, 33.75, 34.0, 35.0, 36.0, 37.0, 38.0, 39.0, 40.0, 41.0, 42.0, 43.0, 44.0, 45.0, 46.0, 47.0, 48.0, 49.0,(540.0/11.0), 50.0, 51.0, (360.0/7.0), 52.0, 53.0, 54.0, 55.0, 56.0, 56.25, 57.0, 58.0, 59.0, 60.0, 61.0, 62.0, 63.0, 64.0, 65.0,(720.0/11.0), 66.0, 67.0, 67.5, 68.0, 69.0, 70.0, 71.0, 72.0, 73.0, 74.0, 75.0, 76.0, 77.0, 78.0, 78.75, 79.0, 80.0, 81.0,(900.0/11.0), 82.0, 83.0, 84.0, 85.0, 86.0, 87.0, 88.0, 89.0, 90.0, 91.0, 92.0, 93.0, 94.0, 95.0, 96.0, 97.0, 98.0,(1080.0/11.0), 99.0, 100.0, 101.0, 101.25, 102.0, (720.0/7.0), 103.0, 104.0, 105.0, 106.0, 107.0, 108.0, 109.0, 110.0, 111.0, 112.0, 112.5, 113.0, 114.0, (1260.0/11), 115.0, 116.0, 117.0, 118.0, 119.0, 120.0, 121.0, 122.0, 123.0, 123.75, 124.0, 125.0, 126.0, 127.0, 128.0, 129.0, 130.0,(1440.0/11.0), 131.0, 132.0, 133.0, 134.0, 135.0, 136.0, 137.0, 138.0, 139.0, 140.0, 141.0, 142.0, 143.0, 144.0, 145.0, 146.0, 146.25, 147.0, (1620.0/11.0), 148.0, 149.0, 150.0, 151.0, 152.0, 153.0, 154.0, (1080.0/7.0), 155.0, 156.0, 157.0, 157.5, 158.0, 159.0, 160.0, 161.0, 162.0, 163.0, (1800.0/11.0), 164.0, 165.0, 166.0, 167.0, 168.0, 168.75, 169.0, 170.0, 171.0, 172.0, 173.0, 174.0, 175.0, 176.0, 177.0,178.0, 179.0,180.0, -179.0, -178.0, -177.0, -176.0, -175.0, -174.0, -173.0, -172.0, -171.0, -170.0, -169.0, -168.75, -168.0, -167.0, -166.0, -165.0, -164.0, (-1800.0/11.0), -163.0, -162.0, -161.0, -160.0, -159.0, -158.0, -157.5, -157.0, -156.0, -155.0, (-1080.0/7.0), -154.0, -153.0, -152.0, -151.0, -150.0, -149.0, -148.0, (-1620.0/11.0), -147.0, -146.25, -146.0, -145.0, -144.0, -143.0, -142.0, -141.0, -140.0, -139.0,-138.0, -137.0, -136.0, -135.0, -134.0, -133.0, -132.0, -131.0, (-1440/11.0), -130.0, -129.0, -128.0,-127.0, -126.0, -125.0, -124.0, -123.75, -123.0, -122.0, -121.0, -120.0, -119.0, -118.0, -117.0, -116.0, -115.0,(-1260.0/11.0), -114.0, -113.0, -112.5, -112.0, -111.0, -110.0, -109.0, -108.0, -107.0, -106.0, -105.0,-104.0, -103.0,(-720.0/7.0), -102.0, -101.25, -101.0, -100.0, -99.0, (-1080.0/11.0), -98.0, -97.0, -96.0, -95.0, -94.0, -93.0, -92.0, -91.0, -90.0, -89.0, -88.0, -87.0, -86.0, -85.0, -84.0, -83.0, -82.0,(-900.0/11.0), -81.0, -80.0, -79.0, -78.75, -78.0, -77.0, -76.0, -75.0, -74.0, -73.0, -72.0, -71.0, -70.0, -69.0, -68.0, -67.5, -67.0, -66.0, (-720.0/11.0), -65.0, -64.0, -63.0, -62.0, -61.0, -60.0, -59.0, -58.0, -57.0, -56.25, -56.0, -55.0, -54.0, -53.0, -52.0,(-360.0/7.0), -51.0, -50.0, (-540.0/11.0), -49.0, -48.0, -47.0, -46.0, -45.0, -44.0, -43.0, -42.0, -41.0, -40.0, -39.0, -38.0, -37.0, -36.0, -35.0, -34.0, -33.75, -33.0,(-360.0/11.0), -32.0, -31.0, -30.0, -29.0, -28.0, -27.0, -26.0, -25.0, -24.0, -23.0, -22.5, -22.0, -21.0, -20.0, -19.0, -18.0, -17.0,(-180.0/11.0), -16.0, -15.0, -14.0, -13.0, -12.0, -11.25, -11.0, -10.0, -9.0, -8.0, -7.0, -6.0, -5.0, -4.0, -3.0, -2.0, -1.0) def tup2nvect(tup): """convert a tuple to a normalized vector""" v=FreeCAD.Vector(*tup) v.normalize() return v def wkaxes(): """well known axes for rotations""" vtupl=((1,0,0),(0,1,0),(0,0,1), (1,1,0),(1,0,1),(0,1,1),(-1,1,0),(-1,0,1),(0,1,-1), (1,1,1),(1,1,-1),(1,-1,1),(-1,1,1)) return tuple(tup2nvect(tup) for tup in vtupl) bestrot=FreeCAD.Rotation() dangle = comparerotations(r1,bestrot) for axis in wkaxes(): for angle in vangl: for axissign in (1.0,-1.0): r2=FreeCAD.Rotation(axis*axissign,angle) dangletest = comparerotations(r1,r2) if dangletest < dangle: bestrot = r2 dangle = dangletest return (bestrot,dangle) def roundrotation(rot,maxangulardistance=1e-5): '''guess the rotation axis and angle for a rotation recreated from rounded floating point values (from a quaterion or transformation matrix)''' def teststandardrot(r1,maxangulardistance=1e-5): '''test a few common rotations beforehand''' import FreeCAD,itertools eulers = [] for angle in (90,-90,180,45,-45,135,-135): for euler in itertools.permutations((0,0,angle)): eulers.append(euler) for euler in itertools.product((0,45,90,135,180,-45,-90,-135),repeat=3): eulers.append(euler) for euler in eulers: r2 = FreeCAD.Rotation(*euler) if comparerotations(r1,r2) < maxangulardistance: return r2 if rot.isNull(): return rot firstguess = teststandardrot(rot,maxangulardistance) if firstguess is not None: return firstguess #brute force bestguess,angulardistance = findbestmatchingrotation(rot) if angulardistance < maxangulardistance: #use guess return bestguess else: #use original return rot def callopenscadmeshstring(scadstr): """Call OpenSCAD and return the result as a Mesh""" import Mesh,os tmpfilename=callopenscadstring(scadstr,'stl') newmesh=Mesh.Mesh() newmesh.read(tmpfilename) try: os.unlink(tmpfilename) except OSError: pass return newmesh def meshopinline(opname,iterable1): """uses OpenSCAD to combine meshes takes the name of the CGAL operation and an iterable (tuple,list) of FreeCAD Mesh objects includes all the mesh data in the SCAD file """ from exportCSG import mesh2polyhedron return callopenscadmeshstring('%s(){%s}' % (opname,' '.join(\ (mesh2polyhedron(meshobj) for meshobj in iterable1)))) def meshoptempfile(opname,iterable1): """uses OpenSCAD to combine meshes takes the name of the CGAL operation and an iterable (tuple,list) of FreeCAD Mesh objects uses stl files to supply the mesh data """ import os,tempfile dir1=tempfile.gettempdir() filenames = [] for mesh in iterable1: outputfilename=os.path.join(dir1,'%s.stl' % tempfilenamegen.next()) mesh.write(outputfilename) filenames.append(outputfilename) #absolute path causes error. We rely that the scad file will be in the dame tmpdir meshimports = ' '.join("import(file = \"%s\");" % \ #filename \ os.path.split(filename)[1] for filename in filenames) result = callopenscadmeshstring('%s(){%s}' % (opname,meshimports)) for filename in filenames: try: os.unlink(filename) except OSError: pass return result def meshoponobjs(opname,inobjs): """ takes a string (operation name) and a list of Feature Objects returns a mesh and a list of objects that were used Part Objects will be meshed """ objs=[] meshes=[] for obj in inobjs: if obj.isDerivedFrom('Mesh::Feature'): objs.append(obj) meshes.append(obj.Mesh) elif obj.isDerivedFrom('Part::Feature'): #mesh the shape import FreeCAD params = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD") objs.append(obj) if False: # disabled due to issue 1292 import MeshPart meshes.append(MeshPart.meshFromShape(obj.Shape,params.GetFloat(\ 'meshmaxlength',1.0), params.GetFloat('meshmaxarea',0.0),\ params.GetFloat('meshlocallen',0.0),\ params.GetFloat('meshdeflection',0.0))) else: import Mesh meshes.append(Mesh.Mesh(obj.Shape.tessellate(params.GetFloat(\ 'meshmaxlength',1.0)))) else: pass #neither a mesh nor a part if len(objs) > 0: return (meshoptempfile(opname,meshes),objs) else: return (None,[]) def process2D_ObjectsViaOpenSCADShape(ObjList,Operation,doc): import FreeCAD,importDXF import os,tempfile dir1=tempfile.gettempdir() filenames = [] for item in ObjList : outputfilename=os.path.join(dir1,'%s.dxf' % tempfilenamegen.next()) importDXF.export([item],outputfilename,True,True) filenames.append(outputfilename) dxfimports = ' '.join("import(file = \"%s\");" % \ #filename \ os.path.split(filename)[1] for filename in filenames) tmpfilename = callopenscadstring('%s(){%s}' % (Operation,dxfimports),'dxf') from OpenSCAD2Dgeom import importDXFface # TBD: assure the given doc is active face = importDXFface(tmpfilename,None,None) #clean up filenames.append(tmpfilename) #delete the ouptut file as well try: os.unlink(tmpfilename) except OSError: pass return face def process2D_ObjectsViaOpenSCAD(ObjList,Operation,doc=None): import FreeCAD doc = doc or FreeCAD.activeDocument() face=process2D_ObjectsViaOpenSCADShape(ObjList,Operation,doc) obj=doc.addObject('Part::Feature',Operation) obj.Shape=face # Hide Children if FreeCAD.GuiUp: for index in ObjList : index.ViewObject.hide() return(obj) def process3D_ObjectsViaOpenSCADShape(ObjList,Operation,maxmeshpoints=None): import FreeCAD,Mesh,Part params = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD") if False: # disabled due to issue 1292 import MeshPart meshes = [MeshPart.meshFromShape(obj.Shape,params.GetFloat(\ 'meshmaxlength',1.0), params.GetFloat('meshmaxarea',0.0),\ params.GetFloat('meshlocallen',0.0),\ params.GetFloat('meshdeflection',0.0)) for obj in ObjList] else: meshes = [Mesh.Mesh(obj.Shape.tessellate(params.GetFloat(\ 'meshmaxlength',1.0))) for obj in ObjList] if max(mesh.CountPoints for mesh in meshes) < \ (maxmeshpoints or params.GetInt('tempmeshmaxpoints',5000)): stlmesh = meshoptempfile(Operation,meshes) sh=Part.Shape() sh.makeShapeFromMesh(stlmesh.Topology,0.1) solid = Part.Solid(sh) solid=solid.removeSplitter() if solid.Volume < 0: solid.complement() return solid def process3D_ObjectsViaOpenSCAD(doc,ObjList,Operation): solid = process3D_ObjectsViaOpenSCADShape(ObjList,Operation) if solid is not None: obj=doc.addObject('Part::Feature',Operation) #non parametric objec obj.Shape=solid#.removeSplitter() if FreeCAD.GuiUp: for index in ObjList : index.ViewObject.hide() return(obj) def process_ObjectsViaOpenSCADShape(doc,children,name,maxmeshpoints=None): if all((not obj.Shape.isNull() and obj.Shape.Volume == 0) \ for obj in children): return process2D_ObjectsViaOpenSCADShape(children,name,doc) elif all((not obj.Shape.isNull() and obj.Shape.Volume > 0) \ for obj in children): return process3D_ObjectsViaOpenSCADShape(children,name,maxmeshpoints) else: import FreeCAD FreeCAD.Console.PrintError( unicode(translate('OpenSCAD',\ "Error all shapes must be either 2D or both must be 3D"))+u'\n') def process_ObjectsViaOpenSCAD(doc,children,name): if all((not obj.Shape.isNull() and obj.Shape.Volume == 0) \ for obj in children): return process2D_ObjectsViaOpenSCAD(children,name,doc) elif all((not obj.Shape.isNull() and obj.Shape.Volume > 0) \ for obj in children): return process3D_ObjectsViaOpenSCAD(doc,children,name) else: import FreeCAD FreeCAD.Console.PrintError( unicode(translate('OpenSCAD',\ "Error all shapes must be either 2D or both must be 3D"))+u'\n') def removesubtree(objs): def addsubobjs(obj,toremoveset): toremove.add(obj) for subobj in obj.OutList: addsubobjs(subobj,toremoveset) import FreeCAD toremove=set() for obj in objs: addsubobjs(obj,toremove) checkinlistcomplete =False while not checkinlistcomplete: for obj in toremove: if (obj not in objs) and (frozenset(obj.InList) - toremove): toremove.remove(obj) break else: checkinlistcomplete = True for obj in toremove: obj.Document.removeObject(obj.Name) def applyPlacement(shape): if shape.Placement.isNull(): return shape else: import Part if shape.ShapeType == 'Solid': return Part.Solid(shape.childShapes()[0]) elif shape.ShapeType == 'Face': return Part.Face(shape.childShapes()) elif shape.ShapeType == 'Compound': return Part.Compound(shape.childShapes()) elif shape.ShapeType == 'Wire': return Part.Wire(shape.childShapes()) elif shape.ShapeType == 'Shell': return Part.Shell(shape.childShapes()) else: return Part.Compound([shape])