[vtkusers] vtkPolyLine - Add new points dynamically?

[Eric E. Monson]

Hey Markus,

I don't know if this will quite work for your application, but in case you didn't know about it, there is the vtkTemporalPathLineFilter:

http://www.vtk.org/doc/nightly/html/classvtkTemporalPathLineFilter.html

I haven't looked through the code, but it may help with your methods. I use it in ParaView all the time to trace out particle paths in time-dependent data sets.

-Eric

------------------------------------------------------
Eric E Monson
Duke Visualization Technology Group


On Jul 26, 2010, at 10:15 AM, Markus Ott wrote:

> Hi vtkusers.
> 
> What i want to do is some kind of real time position tracing. An object
> moves through 3d space and I want to trace this movement with a line.
> 
> I read the polyline example
> (http://vtk.org/Wiki/VTK/Examples/GeometricObjects/Display/PolyLine)
> 
> I need to dynamically add new points to the line in real time and show
> the changes immediately.
> 
> In the example the positions are already known before creating the line.
> How can i update this polyline, add new points and show the changes as
> the line updates?
> 
> Another thing: If I add more and more points the line will have too much
> points eventually. Can i filter out not needed points to keep the
> polydata simple?
> 
> Regards,
> Markus
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