[vtkusers] Hide root vertex and first edges in a directed graph

[Jeff Baumes]

Nicolas,

There is no straightforward way to accomplish this in vtkGraphLayoutView.
What you could possibly do is create a color lookup tables for the vertices
and edges that is transparent at 0 and the normal color at 1, set those on
a vtkViewTheme, and apply that theme to the graph. Then you'd need to add a
0/1 array to the vertices and edges where the root vertex/edges are 0 and
everything else is 1, and color by this array. Pretty hackish, but would
probably work.

Jeff

On Thu, Jan 19, 2012 at 12:22 PM, Nicolas Rannou <nicolas.lists at gmail.com>wrote:

> Hi all,
>
> I have a vtkMutableDirectedGraph and I would like to hide the root vertex
> and the first edges, while visualizing it through a vtkGraphLayoutView.
>              ______
>         root         |
>        /   |   \  __ |  HIDE
>     d1  d2  d3
>  ....    ....   ...
>
> It is possible to do so in the vtkQtTreeView (SetShowRootNode(false)) and
> I was wondering if such a feature was available?
> Which would be the best practice to achieve this goal?
>
> Thanks,
> Nicolas
>
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