[Paraview] Connecting glyph filter with data

[Utkarsh Ayachit]

Michael,

In vtkPeaksReader::RequestData, instead of
"glyphFilter->SetSourceData(sphere->GetOutput())", do

EITHER
   glyphFilter->SetSourceConnection(sphere->GetOutputPort())
OR
  sphere->Update()
  glyphFilter->SetSourceData(sphere->GetOutput())

Unlike the old SetInput()/SetSource() methods,
SetInputData()/SetSourceData() don't set the pipeline connections
between the produces and consumers. So when you called
SetSourceData(sphere->GetOutput()), the current state of the output of
vtkSphereSource was passed on to the glyph filter. Since the
SphereSource hadn't executed yet, it was empty. So we can fix the
problem by either setting up a true pipeline connection (using
SetSourceConnection) or by ensuring that the SphereSource has produced
valid data by calling sphere->Update()

Utkarsh


On Wed, Jan 2, 2013 at 10:50 AM, Michael Reuter <reuterma at ornl.gov> wrote:
> Hi,
>
>     I have a plugin which I'm trying to get working in ParaView 3.98. The
> source code for the plugin can be found here:
> http://github.com/mantidproject/mantid/blob/6315_build_pv_398/Code/Mantid/Vates/ParaviewPlugins/ParaViewReaders/PeaksReader/vtkPeaksReader.cxx.
> After fixing function calls on the vtkPVGlyphFilter to get it to compile
> (lines 96 and 97), the plugin crashes at the vtkGlyphFilter::Update() call
> on vtkPoints::GetNumberOfPoints(). I checked the structuredMesh (it's
> actually a vtkUnstructuredGrid) object used in the
> vtkGlyphFilter::SetInputData() call and found that it does contain data
> points (40 for the particular file I'm looking at).
>     I did some digging about the vtkGlyphFilter::SetInputData() and found
> that it no longer sets up a pipeline connection. I think this might be the
> cause of the glyph filter not finding any data, but I'm unsure. However, I'm
> having trouble figuring out how to use vtkGlyphFilter::SetInputConnection()
> and the structuredMesh object. Is there anyway to make this work using the
> structuredMesh object or is the best thing to make another plugin to create
> the structuredMesh and then do
> vtkGlyphFilter::SetInputConnection(newPlugin->GetOutputPort()) and remove
> the vtkGlyphFilter::SetInputData() call?
>
> Thanks,
> M
>
> --
> Dr. Michael Reuter
> Data Analaysis and Visualization Group
> Neutron Data Analysis and Visualization Division
> Oak Ridge National Laboratory
>
> Office: 1-865-241-7216
> Fax: 1-865-574-6080
> Email: reuterma at ornl.gov
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://www.paraview.org/mailman/listinfo/paraview
>