[vtkusers] Isosurfaces disappears from renderers

[Tatti Emanuele]

Tatti Emanuele wrote:
> Hi all,
> i use latest vtk from cvs, qt 4.1.1 an vtkqt from matthias koenig; 
> when i try to render the output of a vtkcontourfilter, it works 
> without problems, but after few resizes and/or refreshes, the 
> isosurface disappear from the renderer. There is no error on output 
> and there is enough free memory; i tried to debug the mapper, the 
> actor, the renderer and the renderwindow, but no errors.
>
> Here is part of the code...
>
>    filter = vtkContourFilter::New();
>    filter->SetInput(input);
>    filter->SetNumberOfContours(1);
>    filter->SetValue(0,value);
>    filter->SetArrayComponent(comp-1);
>    filter->Update();
>    vtkActor* surfActor = vtkActor::New();
>    vtkPolyDataMapper *surfMapper = vtkPolyDataMapper::New();
>    surfMapper->SetInput(filter->GetOutput());
>    surfMapper->ScalarVisibilityOff();
>    surfActor->SetMapper(surfMapper);
>    renderer->AddActor(a);
>    renderer->Render();
>    renWin->update();
>
>
>
> Ps. i tried only on ati hardware
> how can i investigate the problem?
> _______________________________________________
i found that the problem is not present with MESA rendering... the same 
thing happens on windows and linux...
someone can help me?

thanks