Direct vtkUnstructuredGrid object inquiry

Visualization Solutions HOOPS Envision Desktop
1

I understand that the model and state can be saved as VTU/PVD through VTKLib and VTK Plugin.
But what I want to do is obtain the vtkUnstructuredGrid object directly in memory without any physical file I/O.

2

This appears to be a duplicated of Direct vtkUnstructuredGrid object search