[Paraview] use of vtkSynchronizedTemplates

[Natalie Happenhofer]

Hi!

Update() doesn´t work either, I still get the segmentation fault. (I hate segmentation faults, you never know what´s causing them). At least  I´d need to call the vtkContourFilter from my filter, surely there is a possibility? How could I achieve that? Or maybe there are any filters in paraview which are already calling other filters? 

thx,
Natalie

> Date: Mon, 23 Feb 2009 20:51:42 -0500
> Subject: Re: [Paraview] use of vtkSynchronizedTemplates
> From: berk.geveci at kitware.com
> To: nataliehapp at hotmail.com
> CC: paraview at paraview.org
> 
> Did you try calling Update() on SynchronizedTemplated3D instead of
> ThreadedExecute()? ThreadedExecute() is really meant to be used
> internally.
> 
> -berk
> 
> On Mon, Feb 23, 2009 at 7:48 AM, Natalie Happenhofer
> <nataliehapp at hotmail.com> wrote:
> > Hi!
> > I want to display isosurfaces of values I compute in my filter, so looking
> > at vtkContourFilter, I got the idea to use the vtkSynchronizedTemplates3D
> > (as my filter is going to handle 3D ImageData).
> > I have a vtkSynchronizedTemplate3D as an instance of my filter, in the
> > constructor it´s initialized and then I do the following:
> >
> >
> > this -> SynchronizedTemplates3D -> SetInput(TauSet);
> > this -> SynchronizedTemplates3D -> ComputeNormalsOff();
> > this -> SynchronizedTemplates3D -> ComputeGradientsOff();
> > this -> SynchronizedTemplates3D -> SetComputeScalars(1);
> > this -> SynchronizedTemplates3D -> SetNumberOfContours(1);
> > this -> SynchronizedTemplates3D -> SetValue(0, TauValue);
> >
> > int ext[6];
> > inInfo -> Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(), ext);
> > this -> SynchronizedTemplates3D ->
> > ThreadedExecute(TauSet,inInfo,outInfo,ext, TauValues);
> >
> >
> > It does compile, but running I get an segmentation fault, debugging and
> > backtracing I get:
> >
> > #0  0x00007f42ffc5eb10 in ContourImage<double> () from
> > /home/happenhofer/Paraview/build-svn/bin/libvtkGraphics.so.pv3.4
> > #1  0x00007f42ffc5a308 in vtkSynchronizedTemplates3D::ThreadedExecute ()
> > from /home/happenhofer/Paraview/build-svn/bin/libvtkGraphics.so.pv3.4
> > #2  0x00007f4309195f06 in vtkTauFilter::RequestData () from
> > /home/happenhofer/Paraview/build-svn/bin/libvtkPVFilters.so
> >
> > vtkTauFilter would be my filter, so the error occurs in
> > ContourImage<double>.
> >
> > Does anyone have an idea even how to find the problem? That would be a great
> > help..
> >
> > and just in general - calling ThreadedExecute would execute the
> > SynchronizedTemplate filter and return a grid with the isosurface computed,
> > does it not? or do I have to specifiy the output somehow?
> >
> > thx a lot,
> > Natalie Happenhofer
> >
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