Interoperability between a pybind11_type and its C++ equivalent

[GabrielJMS]

Hello everyone,

First of all, thank you all for all the efforts put into this project!

To provide some context for my question, I have a Python SDK, and I'm exploring the possibility of integrating a C++ SDK. In summary, this C++ SDK includes a function that reads a CAD file and ultimately returns a TopoDS_Shape object, which is part of the OpenCASCADE C++ SDK. On the Python side, I'm utilizing the OCP Python wrapper of OpenCASCADE, which employs pybind11.

In this context, I'm interested in knowing if it's feasible to establish direct interoperability between the C++ TopoDS_Shape object and the pybind11-wrapped TopoDS_Shape object. In other words, I aim to create a pybind11 binding for this C++ function to enable its invocation from Python code and automatically generate an OCP pybind11 TopoDS_Shape object.

Is it possible to achieve such a binding? If yes, how can I accomplish this? Specifically, how can I manage the seamless conversion between the C++ TopoDS_Shape object and the OCP pybind11 TopoDS_Shape object? My first thoughts are if it would be possible to use the TopoDS_Shape from the OCP Python wrapper instead of the one from the OpenCASCADE C++ SDK in the C++ function side, so when I create the binding, it would return already the pybind11_type? How are the interoperability of standard types created? It would be possible to apply some similar approach to a nonstandard type as a TopoDS_Shape

Any insights or examples on this matter would be highly appreciated!

Thank you very much for the attention