[vtkusers] can't update contourFilter unless i do contourFilter->SetValue(, )

[Liam Kurmos]

Hi All,

I was disappinted to get no responses. Was my question unclear? please
let me know.

i want to know:

How can i force the update of my vtkContourFilter output after i
modify the vtkImageData,( other than by calling
vtkContourFilter->SetValue() and changing the isovalue)?

thanks,

Liam



On Thu, Jun 10, 2010 at 4:16 PM, Liam Kurmos
<quantum.leaf at googlemail.com> wrote:
> I'm trying to create an interactive tool to help me get isosurfaces
> from gaussian data.
>
> Ive created an interactorStyle and have no problem getting interaction
> from the user.
>
> From the interactor i can change the data in my vtkImageData which was
> previously set as input for the vtkContourFilter, however the changes
> are not passed through to the render window.
>
> I've called update() on the everything i can think of:
> vtkImageData->Update(), vtkContourFilter->Update() the mapper etc.
> but nothing seems to propagate the changes in the imageData through to
> the renderWindow.
>
> UNLESS i call contourFilter->SetValue(a,b) and change the current
> isovalue in which case the contours update reflecting the changes i
> immediately without needing to call update on anything.
>
> So my question is, How can i get this effect without changing the iso value?
>
> Liam
>