Open source (LGPL) software library for working with the IFC (IFC2x3 TC1 and IFC4) file format.
http://ifcopenshell.org
http://academy.ifcopenshell.org
- Git, CMake (2.6 or newer), Visual Studio 2008 or newer with C++ toolset (Windows), or GCC (*nix, Clang untested).
- 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 build IfcOpenShell using the CMake file provided in the cmake/ folder.
The preferred way to fetch and build this project's dependencies is to use the build scripts in win/ folder. See win/readme.md for more information. Instructions in a nutshell (assuming Visual Studio 2015 x64 environment variables set):
> git clone https://github.com/IfcOpenShell/IfcOpenShell.git
> cd IfcOpenShell\win
> build-deps.cmd
> run-cmake.bat
You can now open and build the solution file in Visual Studio:
> ..\build-vs2015-x64\IfcOpenShell.sln
As the scripts default to using the RelWithDebInfo configuration, and a freshly created solution by CMake defaults
to Debug, make sure to switch the used build configuration. Build the INSTALL project (right-click -> Project
Only) to deploy the headers and binaries into a single location if wanted/needed.
Alternatively, one can use the utility batch files to build and install the project easily from the command-line:
> build-ifcopenshell.cmd
> install-ifcopenshell.cmd
Alternatively, the old Visual Studio solution and project files requiring manual work can be found from the win/sln folder.
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. See the examples below.
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
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")