1c05c7a467
+ now treats windows, doors, slabs, beams and columns + now groups everything into sites, buildings and storeys
432 lines
17 KiB
Python
432 lines
17 KiB
Python
#***************************************************************************
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#* *
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#* Copyright (c) 2011 *
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#* Yorik van Havre <yorik@uncreated.net> *
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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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#* This program 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 Library 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 this program; 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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import ifcReader, FreeCAD, Arch, Draft, os, sys, time, tempfile, Part
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from draftlibs import fcvec
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__title__="FreeCAD IFC importer"
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__author__ = "Yorik van Havre"
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__url__ = "http://free-cad.sourceforge.net"
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DEBUG = True
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SCHEMA = "http://www.steptools.com/support/stdev_docs/express/ifc2x3/ifc2x3_tc1.exp"
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SKIP = ["IfcOpeningElement"]
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if open.__module__ == '__builtin__':
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pyopen = open # because we'll redefine open below
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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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doc.Label = decode(docname)
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FreeCAD.ActiveDocument = doc
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p = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Arch")
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op = p.GetBool("useIfcOpenShell")
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ip = p.GetBool("useIfcParser")
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if op:
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readOpenShell(filename,useParser=ip)
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else:
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readInternal(filename)
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return doc
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def decode(name):
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"decodes encoded strings"
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try:
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decodedName = (name.decode("utf8"))
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except UnicodeDecodeError:
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try:
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decodedName = (name.decode("latin1"))
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except UnicodeDecodeError:
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print "ifc: error: couldn't determine character encoding"
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decodedName = name
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return decodedName
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def getSchema():
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"retrieves the express schema"
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p = None
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p = os.path.join(FreeCAD.ConfigGet("UserAppData"),SCHEMA.split('/')[-1])
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if os.path.exists(p):
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return p
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import ArchCommands
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p = ArchCommands.download(SCHEMA)
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if p:
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return p
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return None
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def getIfcOpenShell():
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"locates and imports ifcopenshell"
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try:
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global IfcImport
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import IfcImport
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except:
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print "Couldn't import IfcOpenShell"
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return False
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else:
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return True
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def readOpenShell(filename,useParser=False):
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"Parses an IFC file with IfcOpenShell"
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altifc = None
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if useParser:
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altifc = parseFile(filename)
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if getIfcOpenShell():
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USESHAPES = False
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if hasattr(IfcImport,"USE_BREP_DATA"):
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IfcImport.Settings(IfcImport.USE_BREP_DATA,True)
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USESHAPES = True
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if IfcImport.Init(filename):
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while True:
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obj = IfcImport.Get()
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if DEBUG: print "parsing ",obj.id,": ",obj.name," of type ",obj.type
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meshdata = []
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n = obj.name
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if not n: n = "Unnamed"
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if obj.type in SKIP:
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pass
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# walls
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elif altifc and (obj.type == "IfcWallStandardCase"):
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makeWall(altifc.Entities[obj.id],shape = getShape(obj) if USESHAPES else None)
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# windows
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elif altifc and (obj.type in ["IfcWindow","IfcDoor"]):
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makeWindow(altifc.Entities[obj.id],shape = getShape(obj) if USESHAPES else None)
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# structs
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elif altifc and (obj.type in ["IfcBeam","IfcColumn","IfcSlab"]):
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makeStructure(altifc.Entities[obj.id],shape = getShape(obj) if USESHAPES else None)
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elif USESHAPES:
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# treat as Parts
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sh = getShape(obj)
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nobj = FreeCAD.ActiveDocument.addObject("Part::Feature",n)
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nobj.Shape = sh
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else:
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# treat as meshes
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me,pl = getMesh(obj)
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nobj = FreeCAD.ActiveDocument.addObject("Mesh::Feature",n)
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nobj.Mesh = me
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nobj.Placement = pl
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if not IfcImport.Next():
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break
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if altifc:
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order(altifc)
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IfcImport.CleanUp()
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return None
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def readInternal(filename):
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"processes an ifc file and add its objects to the given document"
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t1 = time.time()
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ifc = parseFile(filename)
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t2 = time.time()
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if DEBUG: print "Successfully loaded",ifc,"in %s s" % ((t2-t1))
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# getting walls
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for w in ifc.getEnt("IFCWALLSTANDARDCASE"):
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makeWall(w)
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# getting windows and doors
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for w in (ifc.getEnt("IFCWINDOW") + ifc.getEnt("IFCDOOR")):
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makeWindow(w)
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# getting structs
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for w in (ifc.getEnt("IFCSLAB") + ifc.getEnt("IFCBEAM") + ifc.getEnt("IFCCOLUMN")):
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makeWindow(w)
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order(ifc)
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FreeCAD.ActiveDocument.recompute()
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t3 = time.time()
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if DEBUG: print "done processing",ifc,"in %s s" % ((t3-t1))
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def order(ifc):
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"orders the already generated elements by building and by floor"
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# getting floors
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for f in ifc.getEnt("IFCBUILDINGSTOREY"):
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makeCell(f,"Floor")
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# getting buildings
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for b in ifc.getEnt("IFCBUILDING"):
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makeCell(b,"Building")
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# getting sites
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for s in ifc.getEnt("IFCSITE"):
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makeCell(s,"Site")
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def parseFile(filename):
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"parses an IFC file"
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schema=getSchema()
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if schema:
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if DEBUG: global ifc
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if DEBUG: print "opening",filename,"..."
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ifc = ifcReader.IfcDocument(filename,schema=schema,debug=DEBUG)
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return ifc
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else:
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FreeCAD.Console.PrintWarning("IFC Schema not found, IFC import disabled.\n")
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return None
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def makeCell(entity,mode="Cell"):
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"makes a cell in the freecad document"
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try:
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if DEBUG: print "=====> making cell",entity.id
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placement = None
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placement = getPlacement(entity.ObjectPlacement)
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if DEBUG: print "got cell placement",entity.id,":",placement
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subelements = ifc.find("IFCRELCONTAINEDINSPATIALSTRUCTURE","RelatingStructure",entity)
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subelements.extend(ifc.find("IFCRELAGGREGATES","RelatingObject",entity))
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elts = []
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for s in subelements:
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if hasattr(s,"RelatedElements"):
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s = s.RelatedElements
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if not isinstance(s,list): s = [s]
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elts.extend(s)
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elif hasattr(s,"RelatedObjects"):
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s = s.RelatedObjects
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if not isinstance(s,list): s = [s]
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elts.extend(s)
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elif hasattr(s,"RelatedObject"):
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s = s.RelatedObject
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if not isinstance(s,list): s = [s]
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elts.extend(s)
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print "found dependent elements: ",elts
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fcelts = []
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for e in elts:
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if e.type == "IFCWALLSTANDARDCASE":
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o = FreeCAD.ActiveDocument.getObject("Wall"+str(e.id))
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elif e.type == "IFCWINDOW":
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o = FreeCAD.ActiveDocument.getObject("Window"+str(e.id))
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elif e.type == "IFCDOOR":
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o = FreeCAD.ActiveDocument.getObject("Door"+str(e.id))
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elif e.type == "IFCSLAB":
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o = FreeCAD.ActiveDocument.getObject("Slab"+str(e.id))
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elif e.type == "IFCBEAM":
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o = FreeCAD.ActiveDocument.getObject("Beam"+str(e.id))
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elif e.type == "IFCCOLUMN":
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o = FreeCAD.ActiveDocument.getObject("Column"+str(e.id))
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elif e.type == "IFCBUILDINGSTOREY":
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o = FreeCAD.ActiveDocument.getObject("Floor"+str(e.id))
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elif e.type == "IFCBUILDING":
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o = FreeCAD.ActiveDocument.getObject("Building"+str(e.id))
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if o:
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fcelts.append(o)
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name = mode+str(entity.id)
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if mode == "Site":
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cell = Arch.makeSite(fcelts,name=name)
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elif mode == "Floor":
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cell = Arch.makeFloor(fcelts,join=False,name=name)
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elif mode == "Building":
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cell = Arch.makeBuilding(fcelts,name=name)
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else:
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cell = Arch.makeCell(fcelts,join=False,name=name)
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except:
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if DEBUG: print "error: skipping cell",entity.id
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def makeWall(entity,shape=None):
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"makes a wall in the freecad document"
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try:
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if DEBUG: print "=====> making wall",entity.id
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if shape:
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sh = FreeCAD.ActiveDocument.addObject("Part::Feature","WallBody")
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sh.Shape = shape
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wall = Arch.makeWall(sh,name="Wall"+str(entity.id))
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if DEBUG: print "made wall object ",entity.id,":",wall
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return
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placement = wall = wire = body = width = height = None
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placement = getPlacement(entity.ObjectPlacement)
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if DEBUG: print "got wall placement",entity.id,":",placement
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width = entity.getProperty("Width")
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height = entity.getProperty("Height")
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if width and height:
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if DEBUG: print "got width, height ",entity.id,":",width,"/",height
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for r in entity.Representation.Representations:
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if r.RepresentationIdentifier == "Axis":
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wire = getWire(r.Items,placement)
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wall = Arch.makeWall(wire,width,height,align="Center",name="Wall"+str(entity.id))
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else:
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if DEBUG: print "no height or width properties found..."
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for r in entity.Representation.Representations:
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if r.RepresentationIdentifier == "Body":
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for b in r.Items:
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if b.type == "IFCEXTRUDEDAREASOLID":
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norm = getVector(b.ExtrudedDirection)
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norm.normalize()
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wire = getWire(b.SweptArea,placement)
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wall = Arch.makeWall(wire,width=0,height=b.Depth,name="Wall"+str(entity.id))
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wall.Normal = norm
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if wall:
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if DEBUG: print "made wall object ",entity.id,":",wall
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except:
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if DEBUG: print "error: skipping wall",entity.id
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def makeWindow(entity,shape=None):
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"makes a window in the freecad document"
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try:
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typ = "Window" if entity.type == "IFCWINDOW" else "Door"
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if DEBUG: print "=====> making window",entity.id
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if shape:
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window = Arch.makeWindow(name=typ+str(entity.id))
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window.Shape = shape
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if DEBUG: print "made window object ",entity.id,":",window
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return
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placement = window = wire = body = width = height = None
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placement = getPlacement(entity.ObjectPlacement)
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if DEBUG: print "got window placement",entity.id,":",placement
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width = entity.getProperty("Width")
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height = entity.getProperty("Height")
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for r in entity.Representation.Representations:
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if r.RepresentationIdentifier == "Body":
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for b in r.Items:
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if b.type == "IFCEXTRUDEDAREASOLID":
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wire = getWire(b.SweptArea,placement)
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window = Arch.makeWindow(wire,width=b.Depth,name=typ+str(entity.id))
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if window:
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if DEBUG: print "made window object ",entity.id,":",window
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except:
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if DEBUG: print "error: skipping window",entity.id
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def makeStructure(entity,shape=None):
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"makes a structure in the freecad document"
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try:
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if entity.type == "IFCSLAB":
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typ = "Slab"
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elif entity.type == "IFCBEAM":
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typ = "Beam"
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else:
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typ = "Column"
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if DEBUG: print "=====> making struct",entity.id
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if shape:
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sh = FreeCAD.ActiveDocument.addObject("Part::Feature","StructureBody")
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sh.Shape = shape
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structure = Arch.makeStructure(sh,name=typ+str(entity.id))
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if DEBUG: print "made structure object ",entity.id,":",structure
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return
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placement = structure = wire = body = width = height = None
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placement = getPlacement(entity.ObjectPlacement)
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if DEBUG: print "got window placement",entity.id,":",placement
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width = entity.getProperty("Width")
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height = entity.getProperty("Height")
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for r in entity.Representation.Representations:
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if r.RepresentationIdentifier == "Body":
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for b in r.Items:
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if b.type == "IFCEXTRUDEDAREASOLID":
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wire = getWire(b.SweptArea,placement)
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structure = Arch.makeStructure(wire,height=b.Depth,name=typ+str(entity.id))
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if structure:
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if DEBUG: print "made structure object ",entity.id,":",structure
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except:
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if DEBUG: print "error: skipping structure",entity.id
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# geometry helpers ###################################################################
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def getMesh(obj):
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"gets mesh and placement from an IfcOpenShell object"
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import Mesh
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f = obj.mesh.faces
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v = obj.mesh.verts
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for i in range(0, len(f), 3):
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face = []
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for j in range(3):
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vi = f[i+j]*3
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face.append([v[vi],v[vi+1],v[vi+2]])
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meshdata.append(face)
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me = Mesh.Mesh(meshdata)
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# get transformation matrix
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m = obj.matrix
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mat = FreeCAD.Matrix(m[0], m[3], m[6], m[9],
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m[1], m[4], m[7], m[10],
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m[2], m[5], m[8], m[11],
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0, 0, 0, 1)
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pl = FreeCAD.Placement(mat)
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return me,pl
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def getShape(obj):
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"gets a shape from an IfcOpenShell object"
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import StringIO
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sh=Part.Shape()
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sh.importBrep(StringIO.StringIO(obj.mesh.brep_data))
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m = obj.matrix
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mat = FreeCAD.Matrix(m[0], m[3], m[6], m[9],
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m[1], m[4], m[7], m[10],
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m[2], m[5], m[8], m[11],
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0, 0, 0, 1)
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sh.Placement = FreeCAD.Placement(mat)
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return sh
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def getWire(entity,placement=None):
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"returns a wire (created in the freecad document) from the given entity"
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if DEBUG: print "making Wire from :",entity
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if not entity: return None
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if entity.type == "IFCPOLYLINE":
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pts = []
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for p in entity.Points:
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pts.append(getVector(p))
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return Draft.getWire(pts,placement=placement)
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elif entity.type == "IFCARBITRARYCLOSEDPROFILEDEF":
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pts = []
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for p in entity.OuterCurve.Points:
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pts.append(getVector(p))
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return Draft.getWire(pts,closed=True,placement=placement)
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def getPlacement(entity):
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"returns a placement from the given entity"
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if DEBUG: print "getting placement ",entity
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if not entity: return None
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pl = None
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if entity.type == "IFCAXIS2PLACEMENT3D":
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x = getVector(entity.RefDirection)
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z = getVector(entity.Axis)
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y = z.cross(x)
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loc = getVector(entity.Location)
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m = fcvec.getPlaneRotation(x,y,z)
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pl = FreeCAD.Placement(m)
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pl.move(loc)
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elif entity.type == "IFCLOCALPLACEMENT":
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pl = getPlacement(entity.PlacementRelTo)
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relpl = getPlacement(entity.RelativePlacement)
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if pl and relpl:
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pl = relpl.multiply(pl)
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elif relpl:
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pl = relpl
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elif entity.type == "IFCCARTESIANPOINT":
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loc = getVector(entity)
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pl = FreeCAD.Placement()
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pl.move(loc)
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if DEBUG: print "made placement for",entity.id,":",pl
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return pl
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def getVector(entity):
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"returns a vector from the given entity"
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if DEBUG: print "getting point from",entity
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if entity.type == "IFCDIRECTION":
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if len(entity.DirectionRatios) == 3:
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return FreeCAD.Vector(tuple(entity.DirectionRatios))
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else:
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return FreeCAD.Vector(tuple(entity.DirectionRatios+[0]))
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elif entity.type == "IFCCARTESIANPOINT":
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if len(entity.Coordinates) == 3:
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return FreeCAD.Vector(tuple(entity.Coordinates))
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else:
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return FreeCAD.Vector(tuple(entity.Coordinates+[0]))
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return None
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