ParaView serialization

[jourdain]

Missing serializer for:

• vtkPVLODActor
• vtkOpenGLPointGaussianMapper
• vtkPVGridAxes3DActor
• vtkPVRendererCuller
• vtkCameraPass
• vtkLabeledDataMapper
• vtkPVAxesActor
• vtkCoordinate
• vtkPVInteractorStyle

[jourdain]

FYI @jspanchu when running https://github.com/Kitware/trame-vtklocal/tree/master/examples/pv

[jspanchu]

Okay, that is quite smaller list than I expected.

[jourdain]

That is just with a cone... But indeed not too bad... Now the question is how can we handle those since they are not part of VTK.

[jspanchu]

Now the question is how can we handle those since they are not part of VTK.

For this purpose, I've added basic mechanism in vtkObjectManager::InitializeExtensionModuleHandlers( const std::vector<RegistrarType>& registrars) that is capable of loading serialization handlers from libraries external to VTK. Here RegistrarType is a function pointer. Now, the remaining task is to somehow get the extension library's registrar function pointers in Python/JS and send them to vtkObjectManager in python world and vtkWasmSceneManager in wasm world.