[vtkusers] Displaying vtkPolyData while writing on it within Qt objects (QVTKWidget)

[Clinton Stimpson]

On Friday, June 18, 2010 09:22:42 am Barth, Sebastian wrote:
> Hello vtkusers,
> 
> my application uses the QVTKWidget with Qt 4.6.2 and VTK 5.6.0 as a part of
> it's window.
> 
> I have a 3D visualisation of a cluster of points stored in a vtkPolyData.
> On my Qt window I can start a QTimer whose timeout() signal is connected
> to a slot which manipulates the points in the vtkPolyData and updates the
> visualisation pipeline with QVTKWidget::update().
> 
> My vtkRendererWindow uses the default interactor style (trackball camera).
> 
> While moving the camera (mouse interaction) the QVTKWindow gets updated,
> but the vtkPolyData does not. This of course, is a Qt problem, but I want
> to know if I have to do anything special if I want to write on the
> vtkPolyData object from out another thread (QThread) while I'm moving the
> camera and displaying the current written Data. Maybe there is a simplier
> solution, I don't know!
> 
> It's the first time I work with VTK, QT and even threads and I appreciate
> every help!
> 

Are you calling Modifed() on the vtkPolyData after modifying its points?

Clint