open source (LGPL) software library for working with the IFC file format
http://ifcopenshell.org
http://academy.ifcopenshell.org
- Boost
- Open Cascade optional, but required for building IfcGeom)
Official or community edition
For converting IFC representation items into BRep solids and tesselated meshes - ICU optional
For handling code pages and Unicode in the parser - OpenCOLLADA optional
For IfcConvert to be able to write tessellated Collada (.dae) files - SWIG, Python libraries optional
For building the IfcOpenShell Python interface and the Blender add-on - 3ds max SDK optional
For building the 3ds max plug-in
Users are advised to use the Visual Studio .sln file in the win/ folder. For Windows users a prebuilt Open CASCADE version is available from the http://opencascade.org website. Download and install this version and provide the paths to the Open CASCADE header and library files to MS Visual Studio C++.
For building the Autodesk 3ds Max plugin, the 3ds Max SDK needs to be installed as well as 3ds Max itself. Please provide the include and library paths to Visual Studio.
For building the IfcPython wrapper, SWIG needs to be installed. Please download the latest swigwin version from http://www.swig.org/download.html. After extracting the .zip file, please add the extracted folder to the PATH environment variable. Python needs to be installed, please provide the include and library paths to Visual Studio.
Users are advised to build IfcOpenShell using the cmake file provided in the cmake/ folder. There might be an Open CASCADE package in your operating system's software repository. If not, you will need to compile Open CASCADE yourself. See http://opencascade.org.
For building the IfcPython wrapper, SWIG and Python development are required.
Additionally, on Ubuntu (and possibly other linux flavors) the following steps install some of the prerequisites:
$ sudo apt-get install git swig cmake gcc g++ libftgl-dev libtbb2 libtbb-dev libboost-all-dev libgl1-mesa-dev libfreetype6-dev
$ git clone https://github.com/tpaviot/oce.git
$ cd oce
$ mkdir build && cd build
$ cmake ..
$ make
$ sudo make install
To build IfcOpenShell please take the following steps:
$ cd /path/to/IfcOpenShell/cmake
$ mkdir build
$ cd build
Optionally:
$ OCC_INCLUDE_PATH="/path/to/OpenCASCADE/include"
$ OCC_LIBRARY_PATH="/path/to/OpenCASCADE/lib"
$ export OCC_INCLUDE_PATH
$ export OCC_LIBRARY_PATH
$ cmake ../
$ make
If all worked out correctly you can now use IfcOpenShell. For example:
Invoking IfcConvert from the command line
$ wget ftp://ftp.dds.no/pub/ifc/Munkerud/Munkerud_hus6_BE.zip
$ unzip Munkerud_hus6_BE.zip
$ ./IfcConvert Munkerud_hus6_BE.ifc
$ less Munkerud_hus6_BE.obj
Or:
Using the IfcOpenShell Python interface
$ wget -O duplex.zip http://projects.buildingsmartalliance.org/files/?artifact_id=4278
$ unzip duplex.zip
$ python
>>> import ifcopenshell
>>> f = ifcopenshell.open("Duplex_A_20110907_optimized.ifc")
>>>
>>> # Accessing entity instances by type:
>>> f.by_type("ifcwall")[:2]
[#91=IfcWallStandardCase('2O2Fr$t4X7Zf8NOew3FL9r',#1,'Basic Wall:Interior - Partition (92mm Stud):144586',$,'Basic Wall:Interior - Partition (92mm Stud):128360',#5198,#18806,'144586'), #92=IfcWallStandardCase('2O2Fr$t4X7Zf8NOew3FLIE',#1,'Basic Wall:Interior - Partition (92mm Stud):143921',$,'Basic Wall:Interior - Partition (92mm Stud):128360',#5206,#18805,'143921')]
>>> wall = _[0]
>>> len(wall) # number of EXPRESS attributes
8
>>>
>>> # Accessing EXPRESS attributes by name:
>>> wall.GlobalId
'2O2Fr$t4X7Zf8NOew3FL9r'
>>> wall.Name = "My wall"
>>> wall.NonExistingAttr
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File ".\ifcopenshell.py", line 14, in __getattr__
except: raise AttributeError("entity instance of type '%s' has no attribute'%s'"%(self.wrapped_data.is_a(), name)) from None
AttributeError: entity instance of type 'IfcWallStandardCase' has no attribute 'NonExistingAttr'
>>> wall.GlobalId = 3
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File ".\ifcopenshell.py", line 26, in __setattr__
self[self.wrapped_data.get_argument_index(key)] = value
File ".\ifcopenshell.py", line 30, in __setitem__
self.wrapped_data.set_argument(idx, entity_instance.map_value(value))
File ".\ifc_wrapper.py", line 118, in <lambda>
set_argument = lambda self,x,y: self._set_argument(x) if y is None else self
._set_argument(x,y)
File ".\ifc_wrapper.py", line 114, in _set_argument
def _set_argument(self, *args): return _ifc_wrapper.entity_instance__set_argument(self, *args)
RuntimeError: INT is not a valid type for 'GlobalId'
>>> # Creating new entity instances
>>> f.createIfcCartesianPoint(Coordinates=(1.0,1.5,2.0))
#27530=IfcCartesianPoint((1.,1.5,2.))
>>>
>>> # Working with GlobalId attributes:
>>> import uuid
>>> ifcopenshell.guid.compress(uuid.uuid1().hex)
'3x4C8Q_6qHuv$P$FYkANRX'
>>> new_guid = _
>>> owner_hist = f.by_type("IfcOwnerHistory")[0]
>>> new_wall = f.createIfcWallStandardCase(new_guid, owner_hist, None, None, Tag='my_tag')
>>> new_wall.ObjectType = ''
>>> new_wall.ObjectPlacement = new_wall.Representation = None
>>>
>>> # Accessing entity instances by instance id or GlobalId:
>>> f[92]
#92=IfcWallStandardCase('2O2Fr$t4X7Zf8NOew3FLIE',#1,'Basic Wall:Interior - Partition (92mm Stud):143921',$,'Basic Wall:Interior - Partition (92mm Stud):128360',#5206,#18805,'143921')
>>> f['2O2Fr$t4X7Zf8NOew3FLIE']
#92=IfcWallStandardCase('2O2Fr$t4X7Zf8NOew3FLIE',#1,'Basic Wall:Interior - Partition (92mm Stud):143921',$,'Basic Wall:Interior - Partition (92mm Stud):128360',#5206,#18805,'143921')
>>>
>>> # Writing IFC-SPF files to disk:
>>> f.write("out.ifc")