#*************************************************************************** #* 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 * #* * #*************************************************************************** """ This Script includes various python helper functions that are shared across the module.""" import io import itertools import os import shutil import sys import subprocess import tempfile import time from exportCSG import mesh2polyhedron import FreeCAD import Part import Mesh import MeshPart import importDXF __title__ = "FreeCAD OpenSCAD Workbench - Utility Functions" __author__ = "Sebastian Hoogen" __url__ = ["https://www.freecad.org"] translate = FreeCAD.Qt.translate try: 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 getopenscadexe(osfilename=None): if not osfilename: osfilename = FreeCAD.ParamGet(\ "User parameter:BaseApp/Preferences/Mod/OpenSCAD").\ GetString('openscadexecutable') if osfilename and os.path.isfile(osfilename): return osfilename return searchforopenscadexe() def searchforopenscadexe(): """Try to use Python's built-in executable-finder. If that fails, fall back to the old code.""" py3_find = shutil.which("openscad") if py3_find: return py3_find FreeCAD.Console.PrintError( "shutil.which('openscad') did not return a result. Using fallback.\n" ) # The code that follows is from the original OpenSCAD WB code, kept around until we # can verify that all of our expected systems work with the shutil call. -CH 2/23 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 = (b'tell application "Finder"\n' b'POSIX path of (application file id "org.openscad.OpenSCAD"' b'as alias)\n' b'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.decode().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: output = p1.stdout.read() output = output.decode("utf-8") opath = output.split('\n')[0] return opath def getopenscadversion(osfilename=None): if not osfilename: osfilename = FreeCAD.ParamGet(\ "User parameter:BaseApp/Preferences/Mod/OpenSCAD").\ GetString('openscadexecutable') if osfilename and os.path.isfile(osfilename): with subprocess.Popen([osfilename, '-v'],\ stdout = subprocess.PIPE,stderr=subprocess.PIPE, universal_newlines=True) as p: p.wait() stdout = p.stdout.read().strip() stderr = p.stderr.read().strip() return (stdout or stderr) def newtempfilename(): 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''' def check_output2(*args, **kwargs): kwargs.update({'stdout':subprocess.PIPE,'stderr':subprocess.PIPE}) p = subprocess.Popen(*args, **kwargs) stdoutd, stderrd = p.communicate() stdoutd = stdoutd.decode("utf8") stderrd = stderrd.decode("utf8") 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 + '\n') if stdoutd.strip(): FreeCAD.Console.PrintMessage(stdoutd + '\n') return stdoutd preferences = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD") osfilename = preferences.GetString('openscadexecutable') transferMechanism = preferences.GetInt('transfermechanism',0) if transferMechanism == 0: # Use the Python temp-directory creation function transferDirectory = tempfile.gettempdir() elif transferMechanism == 1: # Use a user-specified directory for the transfer transferDirectory = preferences.GetString('transferdirectory') elif transferMechanism == 2: # Use pipes instead of tempfiles return call_openscad_with_pipes(inputfilename, outputfilename, outputext, keepname) else: raise OpenSCADError("Invalid transfer mechanism specified") if osfilename and os.path.isfile(osfilename): if not outputfilename: dir1 = transferDirectory 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' % \ (next(tempfilenamegen),outputext)) check_output2([osfilename, '-o', outputfilename, inputfilename]) return outputfilename else: raise OpenSCADError('OpenSCAD executable unavailable') def call_openscad_with_pipes(input_filename, output_filename, output_extension, keep_name): ''' Call OpenSCAD by sending input data to stdin, and read the output from stdout. Returns the tempfile the output is stored in on success, or None on failure. NOTE: This feature was added to OpenSCAD in 2021.01''' # For testing purposes continue using temp files, but now OpenSCAD does not need # read or write access to the files, only the FreeCAD process does. In the future # this could be changed to keep everything in memory, if desired. transfer_directory = tempfile.gettempdir() # Load the data back in from our tempfile: with open(input_filename) as datafile: openscad_data = datafile.read() # On the command line this looks like: # $ cat myfile.scad | openscad --export-format csg -o - - preferences = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD") openscad_executable = preferences.GetString('openscadexecutable') p = subprocess.Popen([openscad_executable,"--export-format","csg", "-o", "-", "-"], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdoutd,stderrd = p.communicate (input = openscad_data.encode('utf8'), timeout=15) stdoutd = stdoutd.decode("utf8") stderrd = stderrd.decode("utf8") if p.returncode != 0: raise OpenSCADError('%s %s\n' % (stdoutd.strip(),stderrd.strip())) if not output_filename: dir1 = transfer_directory if keep_name: output_filename=os.path.join(dir1,'%s.%s' % (os.path.split(\ input_filename)[1].rsplit('.',1)[0],output_extension)) else: output_filename=os.path.join(dir1,'%s.%s' % \ (next(tempfilenamegen),output_extension)) with open(output_filename,"w") as outfile: outfile.write(stdoutd) return output_filename 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''' dir1 = tempfile.gettempdir() inputfilename = os.path.join(dir1,'%s.scad' % next(tempfilenamegen)) inputfile = io.open(inputfilename,'w', encoding="utf8") 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 = {} for key,value in FreeCAD.getImportType().items(): 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 rt = list(rt) 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 orthogonal (M*Transp(M)==I)""" prod = multiplymat(submatrix,list(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): 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): """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""" 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 mirrormesh(msh, vec): """mirrormesh(mesh,vector) where mesh is a mesh object and vector is a Base.Vector""" poly = mesh2polyhedron(msh) vec_string = '['+str(vec.x)+','+str(vec.y)+','+str(vec.z)+']' param = 'mirror('+vec_string+')' mi = callopenscadmeshstring('%s{%s}' % (param,''.join(poly))) mi.flipNormals() return mi def scalemesh(msh, vec): """scalemesh(mesh,vector) where mesh is a mesh object and vector is a Base.Vector""" poly = mesh2polyhedron(msh) vec_string = '['+str(vec.x)+','+str(vec.y)+','+str(vec.z)+']' param = 'scale('+vec_string+')' mi = callopenscadmeshstring('%s{%s}' % (param,''.join(poly))) mi.flipNormals() return mi def resizemesh(msh, vec): """resizemesh(mesh,vector) where mesh is a mesh object and vector is a Base.Vector""" poly = mesh2polyhedron(msh) vec_string = '['+str(vec.x)+','+str(vec.y)+','+str(vec.z)+']' param = 'resize('+vec_string+')' mi = callopenscadmeshstring('%s{%s}' % (param,''.join(poly))) mi.flipNormals() return mi def angneg(d): return d if (d <= 180.0) else (d-360) def shorthexfloat(f): mantisse, exponent = f.hex().split('p',1) return '%sp%s' % (mantisse.rstrip('0'),exponent) def comparerotations(r1,r2): '''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): 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''' 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""" 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 """ 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 """ dir1 = tempfile.gettempdir() filenames = [] for mesh in iterable1: outputfilename = os.path.join(dir1, '%s.stl' % next(tempfilenamegen)) 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 params = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD") objs.append(obj) if False: # disabled due to issue 1292 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: 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): # https://www.freecad.org/tracker/view.php?id=3419 params = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD") fn = params.GetInt('fnForImport',32) fnStr = ",$fn=" + str(fn) # dir1 = tempfile.gettempdir() filenames = [] for item in ObjList : outputfilename=os.path.join(dir1,'%s.dxf' % next(tempfilenamegen)) importDXF.export([item],outputfilename, True, True) filenames.append(outputfilename) # https://www.freecad.org/tracker/view.php?id=3419 dxfimports = ' '.join("import(file = \"%s\" %s);" % \ #filename \ (os.path.split(filename)[1], fnStr) 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 output file as well try: os.unlink(tmpfilename) except OSError: pass return face def process2D_ObjectsViaOpenSCAD(ObjList, Operation, doc=None): 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): params = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD") if False: # disabled due to issue 1292 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 object 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: FreeCAD.Console.PrintError( translate('OpenSCAD',\ "OpenSCAD file contains both 2D and 3D shapes. That is not supported in this importer, all shapes must have the same dimensionality.")+'\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: FreeCAD.Console.PrintError( translate('OpenSCAD',\ "Error: either all shapes must be 2D or all shapes must be 3D") + '\n') def removesubtree(objs): def addsubobjs(obj, toremoveset): toremove.add(obj) for subobj in obj.OutList: addsubobjs(subobj, toremoveset) 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: 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])