[vtkusers] Implementing a EdgePicker ...

[Sebastien Auclair]

Greeding !

We'd like to be able to pick our objects only by their edge (lines).

We though of implementing a specific picker but we're a bit lost amount all
the different funtions that we can use to achieve our goal.
We don't want to re-invent the weel and someone must have had the same need
...

Any suggestions would be appriciated !!

Thanks in advance !

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Seb