[vtkusers] Picking objects coordinates

[Olivier Coulon]

Dear all,

I have a set of ellipses on a 3D regular grid (structured points). All
these ellipses are described by a single actor.
I want to be able to pick the coordinates of any of these ellipses by
just clicking on it with the mouse.
I made a pathetic attempt using a cell picker but it does not work. I
defined a binding of the mouse right-click on the vtkTkRenderWidget and
that does not work, that seems to be the main problem.
Anybody has a clue about how to do all that ? Am I in the right
direction ?

Thanks in advance.

- olivier


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