[vtkusers] VTK pipeline execution

[R M]

Hello,

I have yet developped several vtk plugins that I only use in Paraview.
Now, I have to develop an application in C++ with QT and using VTK. 
Maybe it is easy, but I would like to know how to manage the VTK Pipeline in my 
application.

Do I have to develop the vtk pipeline like in the examples  
(http://www.vtk.org/Wiki/VTK/Examples/Cxx) , or do I have to use the request 
mechanism(for example, create a vtkInformationStringKey and using 
ProcessRequest) ?

For example, if I want to add a new filter C between 2 existing filters (A, B), 
can  I disconnect the connection between A & B and connect the ouput of  A in 
the input of C and the output of C in the input of B ? Then to update the 
pipeline, Do I have to call update on A (and all the pipeline will be updated) 
or is it better to use the ProcessRequest for doing the update ?

Thank you.
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