[vtkusers] Given a node, emphasize the incident edges

[Steffen Oeltze]

Hi,

in my graph visualization, I would like to visually emphasize all edges 
which are connected to a user-selected node. Is
there an implementation which I can use for that purpose? Otherwise, I 
would try the following strategy: (1) get the
selected node, (2) find incident edges using vtkAdjacentVertexIterator, 
and (3) emphasize these edges.

Best Regards,
Steffen