[vtkusers] Graph visualization features in VTK

[Steffen Oeltze]

Thanks a lot for the quick and very helpful reply.

On 19.01.2011 15:53, Jeff Baumes wrote:
> On Tue, Jan 18, 2011 at 10:41 AM, Steffen Oeltze 
> <stoeltze at isg.cs.uni-magdeburg.de 
> <mailto:stoeltze at isg.cs.uni-magdeburg.de>> wrote:
>
>     DearAll,
>
>     I plan to evaluate VTK for graph visualization and I wonder
>     whether it provides the features listed below.
>     For some features, I already found information online.
>
>     - modifying the edge thickness/width according to some edge weight
>     (???)
>
>
> Not currently possible. To stress certain edges I normally use a color 
> map for edges that changes their opacity based on the weight.
>
Using the opacity is also a good idea. However, I just discovered the 
vtkGraphToPolyData class which should provide access to the edge 
geometry. Maybe, by using, e.g., vtkRibbonFilter, I will be able to 
change the edge width? I wonder how this would influence the edge 
picking in the view.

Cheers,
Steffen
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