[vtkusers] How to visualize an evolving curve in VTK?

[David Doria]

On Thu, Apr 25, 2013 at 12:54 PM, Devran Uğurlu <devran.ugurlu at gmail.com> wrote:
> Hello all,
>
> I have a segmentation algorithm written in ITK and I want to visualize the
> curve as it evolves with VTK. I can show the curve superposed on the
> background image on certain iterations by creating new render windows but I
> couldn't figure out how to do it on one render window like an animation.
> Basically, I want to open a render window that initially shows the initial
> curve superposed on the background and I want to update the curve as it
> evolves while keeping the same render window open. (Background image is
> stationary. Only the curve will be updated)
>
> I am guessing I need to use some sort of event loop but I am new to VTK and
> I am not sure what I'm supposed to do for this problem. I have looked at
> some animation examples but they only change the position of an actor as a
> timer ticks. I want to update my actor as my segmentation code
> iterates(maybe limited by a maximum frame rate). Could you guys point me to
> an example that does something similar please?
>
> Thank you.
>
> Devran


This example shows how to do something like this, but from inside a VTK filter:

http://www.vtk.org/Wiki/VTK/Examples/Cxx/Utilities/VisualDebugging

Perhaps it will point you in the right direction.

David