[vtkusers] What means "connection" in SetInputArrayToProcess ?

[Aurélien Marsan]

Dear vtk users,

Now I'm trying to use the filters of vtk more efficiently.... and to take
advantage of the pipeline capabilities.
But if I understand what idx, port, fieldassociation and fieldattribute
mean, I can't find any explanation about what "int connection" refers to...

I found that it is equal to 0 in most fo cases..... but why ... ?!

Best regards,

A.Marsan
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