/
importIFC.py
759 lines (678 loc) · 29.2 KB
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importIFC.py
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#***************************************************************************
#* *
#* Copyright (c) 2011 *
#* Yorik van Havre <yorik@uncreated.net> *
#* *
#* 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 *
#* *
#***************************************************************************
import ifcReader, FreeCAD, Arch, Draft, os, sys, time, Part, DraftVecUtils
from DraftTools import translate
__title__="FreeCAD IFC importer"
__author__ = "Yorik van Havre"
__url__ = "http://www.freecadweb.org"
# config
subtractiveTypes = ["IfcOpeningElement"] # elements that must be subtracted from their parents
SCHEMA = "http://www.steptools.com/support/stdev_docs/express/ifc2x3/ifc2x3_tc1.exp"
# end config
if open.__module__ == '__builtin__':
pyopen = open # because we'll redefine open below
def open(filename):
"called when freecad opens a file"
docname = os.path.splitext(os.path.basename(filename))[0]
doc = FreeCAD.newDocument(docname)
doc.Label = decode(docname)
FreeCAD.ActiveDocument = doc
getConfig()
read(filename)
return doc
def insert(filename,docname):
"called when freecad wants to import a file"
try:
doc = FreeCAD.getDocument(docname)
except:
doc = FreeCAD.newDocument(docname)
FreeCAD.ActiveDocument = doc
getConfig()
read(filename)
return doc
def getConfig():
"Gets Arch IFC import preferences"
global CREATE_IFC_GROUPS, ASMESH, DEBUG, SKIP, PREFIX_NUMBERS, FORCE_PYTHON_PARSER, SEPARATE_OPENINGS
CREATE_IFC_GROUPS = False
IMPORT_IFC_FURNITURE = False
DEBUG = False
SKIP = ["IfcBuildingElementProxy","IfcFlowTerminal","IfcFurnishingElement"]
ASMESH = ["IfcFurnishingElement"]
PREFIX_NUMBERS = False
FORCE_PYTHON_PARSER = False
SEPARATE_OPENINGS = False
p = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Arch")
CREATE_IFC_GROUPS = p.GetBool("createIfcGroups")
FORCE_PYTHON_PARSER = p.GetBool("forceIfcPythonParser")
DEBUG = p.GetBool("ifcDebug")
SEPARATE_OPENINGS = p.GetBool("ifcSeparateOpenings")
PREFIX_NUMBERS = p.GetBool("ifcPrefixNumbers")
skiplist = p.GetString("ifcSkip")
if skiplist:
SKIP = skiplist.split(",")
asmeshlist = p.GetString("ifcAsMesh")
if asmeshlist:
ASMESH = asmeshlist.split(",")
def getIfcOpenShell():
"locates and imports ifcopenshell"
try:
global IfcImport
import IfcImport
except:
FreeCAD.Console.PrintMessage(str(translate("Arch","Couldn't locate IfcOpenShell\n")))
return False
else:
return True
def read(filename):
"Parses an IFC file"
# parsing the IFC file
t1 = time.time()
num_lines = sum(1 for line in pyopen(filename))
if getIfcOpenShell() and not FORCE_PYTHON_PARSER:
# use the IfcOpenShell parser
# preparing IfcOpenShell
if DEBUG: global ifcObjects,ifcParents
ifcObjects = {} # a table to relate ifc id with freecad object
ifcParents = {} # a table to relate ifc id with parent id
if hasattr(IfcImport,"DISABLE_OPENING_SUBTRACTIONS") and SEPARATE_OPENINGS:
IfcImport.Settings(IfcImport.DISABLE_OPENING_SUBTRACTIONS,True)
else:
SKIP.append("IfcOpeningElement")
useShapes = False
if hasattr(IfcImport,"USE_BREP_DATA"):
IfcImport.Settings(IfcImport.USE_BREP_DATA,True)
useShapes = True
else:
if DEBUG: print "Warning: IfcOpenShell version very old, unable to handle Brep data"
# processing geometry
if IfcImport.Init(filename):
while True:
obj = IfcImport.Get()
if DEBUG: print "["+str(int((float(obj.id)/num_lines)*100))+"%] parsing ",obj.id,": ",obj.name," of type ",obj.type
# retrieving name
n = getName(obj)
# skip types
if obj.type in SKIP:
if DEBUG: print "skipping because type is in skip list"
nobj = None
else:
# build shape
shape = None
if useShapes:
shape = getShape(obj)
# walls
if obj.type in ["IfcWallStandardCase","IfcWall"]:
nobj = makeWall(obj.id,shape,n)
# windows
elif obj.type in ["IfcWindow","IfcDoor"]:
nobj = makeWindow(obj.id,shape,n)
# structs
elif obj.type in ["IfcBeam","IfcColumn","IfcSlab","IfcFooting"]:
nobj = makeStructure(obj.id,shape,obj.type,n)
# roofs
elif obj.type in ["IfcRoof"]:
nobj = makeRoof(obj.id,shape,n)
# furniture
elif obj.type in ["IfcFurnishingElement"]:
nobj = FreeCAD.ActiveDocument.addObject("Part::Feature",n)
nobj.Shape = shape
# sites
elif obj.type in ["IfcSite"]:
nobj = makeSite(obj.id,shape,n)
# spaces
elif obj.type in ["IfcSpace"]:
nobj = makeSpace(obj.id,shape,n)
elif shape:
# treat as dumb parts
#if DEBUG: print "Fixme: Shape-containing object not handled: ",obj.id, " ", obj.type
nobj = FreeCAD.ActiveDocument.addObject("Part::Feature",n)
nobj.Shape = shape
else:
# treat as meshes
if DEBUG: print "Warning: Object without shape: ",obj.id, " ", obj.type
me,pl = getMesh(obj)
nobj = FreeCAD.ActiveDocument.addObject("Mesh::Feature",n)
nobj.Mesh = me
nobj.Placement = pl
# registering object number and parent
if obj.parent_id > 0:
ifcParents[obj.id] = [obj.parent_id,not (obj.type in subtractiveTypes)]
ifcObjects[obj.id] = nobj
if not IfcImport.Next():
break
# processing non-geometry and relationships
parents_temp = dict(ifcParents)
import ArchCommands
while parents_temp:
id, c = parents_temp.popitem()
parent_id = c[0]
additive = c[1]
if (id <= 0) or (parent_id <= 0):
# root dummy object
parent = None
elif parent_id in ifcObjects:
parent = ifcObjects[parent_id]
# check if parent is a subtraction, if yes parent to grandparent
if parent_id in ifcParents:
if ifcParents[parent_id][1] == False:
grandparent_id = ifcParents[parent_id][0]
if grandparent_id in ifcObjects:
parent = ifcObjects[grandparent_id]
else:
# creating parent if needed
parent_ifcobj = IfcImport.GetObject(parent_id)
if DEBUG: print "["+str(int((float(parent_ifcobj.id)/num_lines)*100))+"%] parsing ",parent_ifcobj.id,": ",parent_ifcobj.name," of type ",parent_ifcobj.type
n = getName(parent_ifcobj)
if parent_ifcobj.id <= 0:
parent = None
elif parent_ifcobj.type == "IfcBuildingStorey":
parent = Arch.makeFloor(name=n)
parent.Label = n
elif parent_ifcobj.type == "IfcBuilding":
parent = Arch.makeBuilding(name=n)
parent.Label = n
elif parent_ifcobj.type == "IfcSite":
parent = Arch.makeSite(name=n)
parent.Label = n
elif parent_ifcobj.type == "IfcWindow":
parent = Arch.makeWindow(name=n)
parent.Label = n
else:
if DEBUG: print "Fixme: skipping unhandled parent: ", parent_ifcobj.id, " ", parent_ifcobj.type
parent = None
# registering object number and parent
if parent_ifcobj.parent_id > 0:
ifcParents[parent_ifcobj.id] = [parent_ifcobj.parent_id,True]
parents_temp[parent_ifcobj.id] = [parent_ifcobj.parent_id,True]
if parent and (not parent_ifcobj.id in ifcObjects):
ifcObjects[parent_ifcobj.id] = parent
# attributing parent
if parent and (id in ifcObjects):
if ifcObjects[id]:
if additive:
ArchCommands.addComponents(ifcObjects[id],parent)
else:
ArchCommands.removeComponents(ifcObjects[id],parent)
IfcImport.CleanUp()
else:
# use only the internal python parser
FreeCAD.Console.PrintWarning(str(translate("Arch","IfcOpenShell not found or disabled, falling back on internal parser.\n")))
schema=getSchema()
if schema:
if DEBUG: global ifc
if DEBUG: print "opening",filename,"..."
ifc = ifcReader.IfcDocument(filename,schema=schema,debug=DEBUG)
else:
FreeCAD.Console.PrintWarning(str(translate("Arch","IFC Schema not found, IFC import disabled.\n")))
return None
t2 = time.time()
if DEBUG: print "Successfully loaded",ifc,"in %s s" % ((t2-t1))
# getting walls
for w in ifc.getEnt("IfcWallStandardCase"):
nobj = makeWall(w)
# getting windows and doors
for w in (ifc.getEnt("IfcWindow") + ifc.getEnt("IfcDoor")):
nobj = makeWindow(w)
# getting structs
for w in (ifc.getEnt("IfcSlab") + ifc.getEnt("IfcBeam") + ifc.getEnt("IfcColumn") \
+ ifc.getEnt("IfcFooting")):
nobj = makeStructure(w)
# getting floors
for f in ifc.getEnt("IfcBuildingStorey"):
group(f,ifc,"Floor")
# getting buildings
for b in ifc.getEnt("IfcBuilding"):
group(b,ifc,"Building")
# getting sites
for s in ifc.getEnt("IfcSite"):
group(s,ifc,"Site")
if DEBUG: print "done parsing. Recomputing..."
FreeCAD.ActiveDocument.recompute()
t3 = time.time()
if DEBUG: print "done processing IFC file in %s s" % ((t3-t1))
return None
def getName(ifcobj):
"Get a clean name from an ifc object"
n = ifcobj.name
if not n:
n = ifcobj.type
if PREFIX_NUMBERS:
n = "ID"+str(ifcobj.id)+" "+n
#for c in ",.!?;:":
# n = n.replace(c,"_")
return n
def makeWall(entity,shape=None,name="Wall"):
"makes a wall in the freecad document"
try:
if shape:
# use ifcopenshell
if isinstance(shape,Part.Shape):
body = FreeCAD.ActiveDocument.addObject("Part::Feature",name+"_body")
body.Shape = shape
else:
body = FreeCAD.ActiveDocument.addObject("Mesh::Feature",name+"_body")
body.Mesh = shape
wall = Arch.makeWall(body,name=name)
wall.Label = name
if DEBUG: print "made wall object ",entity,":",wall
return wall
# use internal parser
if DEBUG: print "=====> making wall",entity.id
placement = wall = wire = body = width = height = None
placement = getPlacement(entity.ObjectPlacement)
if DEBUG: print "got wall placement",entity.id,":",placement
width = entity.getProperty("Width")
height = entity.getProperty("Height")
if width and height:
if DEBUG: print "got width, height ",entity.id,":",width,"/",height
for r in entity.Representation.Representations:
if r.RepresentationIdentifier == "Axis":
wire = getWire(r.Items,placement)
wall = Arch.makeWall(wire,width,height,align="Center",name="Wall"+str(entity.id))
else:
if DEBUG: print "no height or width properties found..."
for r in entity.Representation.Representations:
if r.RepresentationIdentifier == "Body":
for b in r.Items:
if b.type == "IFCEXTRUDEDAREASOLID":
norm = getVector(b.ExtrudedDirection)
norm.normalize()
wire = getWire(b.SweptArea,placement)
wall = Arch.makeWall(wire,width=0,height=b.Depth,name="Wall"+str(entity.id))
wall.Normal = norm
if wall:
if DEBUG: print "made wall object ",entity.id,":",wall
return wall
if DEBUG: print "error: skipping wall",entity.id
return None
except:
if DEBUG: print "error: skipping wall",entity
return None
def makeWindow(entity,shape=None,name="Window"):
"makes a window in the freecad document"
try:
if shape:
# use ifcopenshell
if isinstance(shape,Part.Shape):
window = Arch.makeWindow(name=name)
window.Shape = shape
window.Label = name
if DEBUG: print "made window object ",entity,":",window
return window
# use internal parser
if DEBUG: print "=====> making window",entity.id
placement = window = wire = body = width = height = None
placement = getPlacement(entity.ObjectPlacement)
if DEBUG: print "got window placement",entity.id,":",placement
width = entity.getProperty("Width")
height = entity.getProperty("Height")
for r in entity.Representation.Representations:
if r.RepresentationIdentifier == "Body":
for b in r.Items:
if b.type == "IFCEXTRUDEDAREASOLID":
wire = getWire(b.SweptArea,placement)
window = Arch.makeWindow(wire,width=b.Depth,name=objtype+str(entity.id))
if window:
if DEBUG: print "made window object ",entity.id,":",window
return window
if DEBUG: print "error: skipping window",entity.id
return None
except:
if DEBUG: print "error: skipping window",entity
return None
def makeStructure(entity,shape=None,ifctype=None,name="Structure"):
"makes a structure in the freecad document"
try:
if shape:
# use ifcopenshell
if isinstance(shape,Part.Shape):
body = FreeCAD.ActiveDocument.addObject("Part::Feature",name+"_body")
body.Shape = shape
else:
body = FreeCAD.ActiveDocument.addObject("Mesh::Feature",name+"_body")
body.Mesh = shape
structure = Arch.makeStructure(body,name=name)
structure.Label = name
if ifctype == "IfcBeam":
structure.Role = "Beam"
elif ifctype == "IfcColumn":
structure.Role = "Column"
elif ifctype == "IfcSlab":
structure.Role = "Slab"
elif ifctype == "IfcFooting":
structure.Role = "Foundation"
if DEBUG: print "made structure object ",entity,":",structure," (type: ",ifctype,")"
return structure
# use internal parser
if DEBUG: print "=====> making struct",entity.id
placement = structure = wire = body = width = height = None
placement = getPlacement(entity.ObjectPlacement)
if DEBUG: print "got window placement",entity.id,":",placement
width = entity.getProperty("Width")
height = entity.getProperty("Height")
for r in entity.Representation.Representations:
if r.RepresentationIdentifier == "Body":
for b in r.Items:
if b.type == "IFCEXTRUDEDAREASOLID":
wire = getWire(b.SweptArea,placement)
structure = Arch.makeStructure(wire,height=b.Depth,name=objtype+str(entity.id))
if structure:
if DEBUG: print "made structure object ",entity.id,":",structure
return structure
if DEBUG: print "error: skipping structure",entity.id
return None
except:
if DEBUG: print "error: skipping structure",entity
return None
def makeSite(entity,shape=None,name="Site"):
"makes a site in the freecad document"
try:
body = None
if shape:
# use ifcopenshell
if isinstance(shape,Part.Shape):
body = FreeCAD.ActiveDocument.addObject("Part::Feature",name+"_body")
body.Shape = shape
else:
body = FreeCAD.ActiveDocument.addObject("Mesh::Feature",name+"_body")
body.Mesh = shape
site = Arch.makeSite(name=name)
site.Label = name
if body:
site.Terrain = body
if DEBUG: print "made site object ",entity,":",site
return site
except:
return None
def makeSpace(entity,shape=None,name="Space"):
"makes a space in the freecad document"
try:
if shape:
# use ifcopenshell
if isinstance(shape,Part.Shape):
space = Arch.makeSpace(name=name)
space.Label = name
body = FreeCAD.ActiveDocument.addObject("Part::Feature",name+"_body")
body.Shape = shape
space.Base = body
body.ViewObject.hide()
if DEBUG: print "made space object ",entity,":",space
return space
except:
return None
def makeRoof(entity,shape=None,name="Roof"):
"makes a roof in the freecad document"
try:
if shape:
# use ifcopenshell
if isinstance(shape,Part.Shape):
roof = Arch.makeRoof(name=name)
roof.Label = name
roof.Shape = shape
if DEBUG: print "made roof object ",entity,":",roof
return roof
except:
return None
# geometry helpers ###################################################################
def getMesh(obj):
"gets mesh and placement from an IfcOpenShell object"
import Mesh
meshdata = []
print obj.mesh.faces
print obj.mesh.verts
f = obj.mesh.faces
v = obj.mesh.verts
for i in range(0, len(f), 3):
face = []
for j in range(3):
vi = f[i+j]*3
face.append([v[vi],v[vi+1],v[vi+2]])
meshdata.append(face)
print meshdata
me = Mesh.Mesh(meshdata)
# get transformation matrix
m = obj.matrix
mat = FreeCAD.Matrix(m[0], m[3], m[6], m[9],
m[1], m[4], m[7], m[10],
m[2], m[5], m[8], m[11],
0, 0, 0, 1)
pl = FreeCAD.Placement(mat)
return me,pl
def getShape(obj):
"gets a shape from an IfcOpenShell object"
#print "retrieving shape from obj ",obj.id
import Part
sh=Part.Shape()
try:
sh.importBrepFromString(obj.mesh.brep_data)
#sh = Part.makeBox(2,2,2)
except:
print "Error: malformed shape"
return None
if not sh.Solids:
# try to extract a solid shape
if sh.Faces:
try:
if DEBUG: print "Malformed solid. Attempting to fix..."
shell = Part.makeShell(sh.Faces)
if shell:
solid = Part.makeSolid(shell)
if solid:
sh = solid
except:
if DEBUG: print "failed to retrieve solid from object ",obj.id
else:
if DEBUG: print "object ", obj.id, " doesn't contain any face"
m = obj.matrix
mat = FreeCAD.Matrix(m[0], m[3], m[6], m[9],
m[1], m[4], m[7], m[10],
m[2], m[5], m[8], m[11],
0, 0, 0, 1)
sh.Placement = FreeCAD.Placement(mat)
# if DEBUG: print "getting Shape from ",obj
#print "getting shape: ",sh,sh.Solids,sh.Volume,sh.isValid(),sh.isNull()
#for v in sh.Vertexes: print v.Point
return sh
# below is only used by the internal parser #########################################
def decode(name):
"decodes encoded strings"
try:
decodedName = (name.decode("utf8"))
except UnicodeDecodeError:
try:
decodedName = (name.decode("latin1"))
except UnicodeDecodeError:
FreeCAD.Console.PrintError(str(translate("Arch", "Error: Couldn't determine character encoding\n")))
decodedName = name
return decodedName
def getSchema():
"retrieves the express schema"
custom = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Arch").GetString("CustomIfcSchema","")
if custom:
if os.path.exists(custom):
if DEBUG: print "Using custom schema: ",custom.split(os.sep)[-1]
return custom
p = None
p = os.path.join(FreeCAD.ConfigGet("UserAppData"),SCHEMA.split(os.sep)[-1])
if os.path.exists(p):
return p
import ArchCommands
p = ArchCommands.download(SCHEMA)
if p:
return p
return None
def group(entity,ifc,mode=None):
"gathers the children of the given entity"
# only used by the internal parser
try:
if DEBUG: print "=====> making group",entity.id
placement = None
placement = getPlacement(entity.ObjectPlacement)
if DEBUG: print "got cell placement",entity.id,":",placement
subelements = ifc.find("IFCRELCONTAINEDINSPATIALSTRUCTURE","RelatingStructure",entity)
subelements.extend(ifc.find("IFCRELAGGREGATES","RelatingObject",entity))
elts = []
for s in subelements:
if hasattr(s,"RelatedElements"):
s = s.RelatedElements
if not isinstance(s,list): s = [s]
elts.extend(s)
elif hasattr(s,"RelatedObjects"):
s = s.RelatedObjects
if not isinstance(s,list): s = [s]
elts.extend(s)
elif hasattr(s,"RelatedObject"):
s = s.RelatedObject
if not isinstance(s,list): s = [s]
elts.extend(s)
print "found dependent elements: ",elts
groups = [['Wall',['IfcWallStandardCase'],[]],
['Window',['IfcWindow','IfcDoor'],[]],
['Structure',['IfcSlab','IfcFooting','IfcBeam','IfcColumn'],[]],
['Floor',['IfcBuildingStorey'],[]],
['Building',['IfcBuilding'],[]],
['Furniture',['IfcFurnishingElement'],[]]]
for e in elts:
for g in groups:
for t in g[1]:
if e.type.upper() == t.upper():
if hasattr(FreeCAD.ActiveDocument,g[0]+str(e.id)):
g[2].append(FreeCAD.ActiveDocument.getObject(g[0]+str(e.id)))
print "groups:",groups
comps = []
if CREATE_IFC_GROUPS:
if DEBUG: print "creating subgroups"
for g in groups:
if g[2]:
if g[0] in ['Building','Floor']:
comps.extend(g[2])
else:
fcg = FreeCAD.ActiveDocument.addObject("App::DocumentObjectGroup",g[0]+"s")
for o in g[2]:
fcg.addObject(o)
comps.append(fcg)
else:
for g in groups:
comps.extend(g[2])
label = entity.Name
name = mode + str(entity.id)
cell = None
if mode == "Site":
cell = Arch.makeSite(comps,name=name)
elif mode == "Floor":
cell = Arch.makeFloor(comps,name=name)
elif mode == "Building":
cell = Arch.makeBuilding(comps,name=name)
if label and cell:
cell.Label = label
except:
if DEBUG: print "error: skipping group ",entity.id
def getWire(entity,placement=None):
"returns a wire (created in the freecad document) from the given entity"
# only used by the internal parser
if DEBUG: print "making Wire from :",entity
if not entity: return None
if entity.type == "IFCPOLYLINE":
pts = []
for p in entity.Points:
pts.append(getVector(p))
return Draft.getWire(pts,placement=placement)
elif entity.type == "IFCARBITRARYCLOSEDPROFILEDEF":
pts = []
for p in entity.OuterCurve.Points:
pts.append(getVector(p))
return Draft.getWire(pts,closed=True,placement=placement)
def getPlacement(entity):
"returns a placement from the given entity"
# only used by the internal parser
if DEBUG: print "getting placement ",entity
if not entity: return None
pl = None
if entity.type == "IFCAXIS2PLACEMENT3D":
x = getVector(entity.RefDirection)
z = getVector(entity.Axis)
y = z.cross(x)
loc = getVector(entity.Location)
m = DraftVecUtils.getPlaneRotation(x,y,z)
pl = FreeCAD.Placement(m)
pl.move(loc)
elif entity.type == "IFCLOCALPLACEMENT":
pl = getPlacement(entity.PlacementRelTo)
relpl = getPlacement(entity.RelativePlacement)
if pl and relpl:
pl = relpl.multiply(pl)
elif relpl:
pl = relpl
elif entity.type == "IFCCARTESIANPOINT":
loc = getVector(entity)
pl = FreeCAD.Placement()
pl.move(loc)
if DEBUG: print "made placement for",entity.id,":",pl
return pl
def getVector(entity):
"returns a vector from the given entity"
# only used by the internal parser
if DEBUG: print "getting point from",entity
if entity.type == "IFCDIRECTION":
if len(entity.DirectionRatios) == 3:
return FreeCAD.Vector(tuple(entity.DirectionRatios))
else:
return FreeCAD.Vector(tuple(entity.DirectionRatios+[0]))
elif entity.type == "IFCCARTESIANPOINT":
if len(entity.Coordinates) == 3:
return FreeCAD.Vector(tuple(entity.Coordinates))
else:
return FreeCAD.Vector(tuple(entity.Coordinates+[0]))
return None
# EXPORT ##########################################################
def export(exportList,filename):
"called when freecad exports a file"
try:
import ifcWriter
except:
print "IFC export: ifcWriter not found or unusable"
return
import Arch,Draft
application = "FreeCAD"
ver = FreeCAD.Version()
version = ver[0]+"."+ver[1]+" build"+ver[2]
owner = FreeCAD.ActiveDocument.CreatedBy
company = FreeCAD.ActiveDocument.Company
project = FreeCAD.ActiveDocument.Name
ifc = ifcWriter.IfcDocument(filename,project,owner,company,application,version)
for obj in exportList:
otype = Draft.getType(obj)
gdata = Arch.getExtrusionData(obj)
if not data:
fdata = Arch.getBrepFacesData(obj)
if otype == "Wall":
if gdata:
ifc.addWall( ifc.addExtrudedPolyline(gdata) )
elif fdata:
ifc.addWall( ifc.addFacetedBrep(fdata) )
else:
print "IFC export: error retrieving the shape of object ", obj.Name
else:
print "object type ", otype, " is not supported yet."
ifc.write()
print "Successfully exported ",filename