PythonOCC
Description
PythonOCC è un progetto abbastanza giovane e dinamico che mira a unire la gamma di funzioni di OpenCascade in un modulo python. Questo è un metodo molto differente da quello di FreeCAD, che utilizza solo alcuni componenti di OpenCascade, e che risulta una struttura molto più semplice.
PythonOCC, d'altra parte, dato che fornisce l'accesso a tutte le classi e funzioni OCC, è molto complesso, ma è anche molto potente. È quindi una bella aggiunta a FreeCAD. Quando si è limitati dalle funzionalità OCC disponibili in FreeCAD per gli script python, è il momento di caricare pythonOCC.
Usage
Attualmente nel modulo Parte abbiamo i metodi: Part.__toPythonOCC__() e Part.__fromPythonOCC__() per scambiare entità TopoDS_Shape da o per pythonOCC. Questo permette di utilizzare tutta la potenza di OCC in python (con pythonocc) e poi di mettere nuovamente le forme risultanti in FreeCAD.
PythonOCC is internally used by the IFC viewer included with the IfcOpenShell libraries. IfcOpenShell is used to read and write IFC documents with FreeCAD. PythonOCC is only needed to launch IfcOpenShell's integrated viewer, otherwise it is not necessary.
Installation
PythonOCC must be compiled from source. For this you need to get the corresponding development files for OpenCASCADE Technology (OCCT) and SWIG. The older version of PythonOCC was intended to wrap around OCE 0.18, the community edition of OCCT 6.9.x, which is now unmaintained. The newest version of PythonOCC is now intended to work with the recent, official OCCT 7.4 version.
Together with OCCT 7.4, PythonOCC requires fairly recent dependencies like Python 3.7, CMake 3.12, and SWIG 3.0.11. Python 2 is no longer supported.
It is also possible to install pre-compiled PythonOCC libraries using Conda. For more information and compilation instructions, see the main project's repository, tpaviot/pythonocc-core.
Compilation
You can also self compile pythonOCC (see instructions). Below is the procedure for Debian/Ubuntu using distro-provided opencascade packages:
git clone git://github.com/tpaviot/pythonocc-core.git pythonocc cd pythonocc mkdir build cd build cmake -DOCE_INCLUDE_PATH=/usr/include/opencascade -DOCE_LIB_PATH=/usr/lib/x86_64-linux-gnu .. make
More information
- Project page: pythonocc.org
- Newer version compatible with OCCT 7.4, tpaviot/pythonocc-core.
- Older version compatible with OCE 0.18, the community edition of OCCT 6.9.x, tpaviot/pythonocc.
- IfcPlusPlus compiled on Gentoo - questions and alternatives?

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