[Paraview] plugin error: "Input for algorithm vtkPVPostFilter is of type ..., but a vtkPolyData is required"

Thu Jul 14 11:42:15 EDT 2016

It was also merged into master, so you can just update ParaView's
master branch now.

Best,
Cory

On Thu, Jul 14, 2016 at 11:34 AM, T.J. Corona <tj.corona at kitware.com> wrote:
> Hi Corinna,
>
> Would you mind trying the patch associated with this merge request:
> https://gitlab.kitware.com/paraview/paraview/merge_requests/882 ? I think it
> is a better fix to the bug you are seeing.
>
> Sincerely,
> T.J.
>
> Thomas J. Corona, Ph.D.
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4443
>
> On Jul 14, 2016, at 10:25 AM, corinna reuter <corinnareuter75 at gmail.com>
> wrote:
>
> Thank you! After recompiling Paraview with that patch, the problem seems to
> be solved.
> Will the patch be automatically merged into the development version? And in
> which future Paraview release can we expect to find it? (I don't understand
> the details of the build robot's messages)
>
> Corinna
>
> On Wed, Jul 13, 2016 at 5:25 PM, Cory Quammen <cory.quammen at kitware.com>
> wrote:
>>
>> Corinna,
>>
>> It seems that your use case is not currently supported. T.J. (CC'ed)
>> is working on a bug fix in ParaView that should enable what you are
>> doing.
>>
>> https://gitlab.kitware.com/paraview/paraview/merge_requests/404
>>
>> He can fill you in with more details if you need.
>>
>> Thanks,
>> Cory
>>
>> On Wed, Jul 13, 2016 at 2:13 AM, corinna reuter
>> <corinnareuter75 at gmail.com> wrote:
>> > Hi Cory,
>> > can you still help me to find the problem, why the custom vtkTest source
>> > cannot be produced inside paraview, but fails with a vtkPVPostFilter
>> > message
>> > (see subject)? A complete test was attached to my previous email.
>> >
>> > Why does vtkPVPostFilter expect vtkPolyData input, although both in the
>> > Servermanager xml and in FillOutputPortInformation the type is correctly
>> > given as vtkTest? Is there another place, where I need to define the
>> > output
>> > type?
>> >
>> > I also tried to make use of the vtkTableReader, but I can't seem to make
>> > it
>> > work, because it tries to read point data, cell data etc., which don't
>> > exist
>> > a priori in my use case.
>> >
>> > Corinna
>> >
>> >
>> > On Fri, Jul 8, 2016 at 10:03 AM, corinna reuter
>> > <corinnareuter75 at gmail.com>
>> > wrote:
>> >>
>> >> Hi Cory,
>> >> I attach the complete sources for compiling and testing the described
>> >> problem.
>> >> (Tested with Paraview 5.0.1 compiled from sources.)
>> >>
>> >> Corinna
>> >>
>> >> On Thu, Jul 7, 2016 at 7:31 PM, corinna reuter
>> >> <corinnareuter75 at gmail.com>
>> >> wrote:
>> >>>
>> >>> Yes, FillOutputPortInformation already looks exactly as you say.
>> >>>
>> >>> I gave the link to the complete example code in my initial question:
>> >>> http://www.vtk.org/Wiki/VTK_Examples_vtkAlgorithm_Source
>> >>> I changed a few lines to make it compile with Paraview 5.0.1 (see the
>> >>> comments in the CMakeLists.txt with my initial question). In addition,
>> >>> I can
>> >>> send to you tomorrow a small source archive ready for compilation.
>> >>>
>> >>> I'll also check vtkTable to see if it solves my problem. I thought of
>> >>> just deriving the vtkTest class from vtkDataSet and returning a fake,
>> >>> empty
>> >>> dataset while keeping the information from which the actual vtkDataSet
>> >>> will
>> >>> be processed downstream in the pipeline. Do you think that this
>> >>> workaround
>> >>> is feasible, or what other problems should I excpect?
>> >>>
>> >>> Thank you
>> >>> Corinna
>> >>>
>> >>>
>> >>> On Thu, Jul 7, 2016 at 3:03 PM, Cory Quammen
>> >>> <cory.quammen at kitware.com>
>> >>> wrote:
>> >>>>
>> >>>> Hi Corinna,
>> >>>>
>> >>>> Does vtkTestSource override the FillOutputPortInformation() member
>> >>>> function? It should look like
>> >>>>
>> >>>>
>> >>>>
>> >>>> //----------------------------------------------------------------------------
>> >>>> int vtkTestSource::FillOutputPortInformation(
>> >>>>   int vtkNotUsed(port), vtkInformation* info)
>> >>>> {
>> >>>>   // now add our info
>> >>>>   info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkTest");
>> >>>>   return 1;
>> >>>> }
>> >>>>
>> >>>> If that doesn't fix the error, let us know.
>> >>>>
>> >>>> You may run into other problems with a custom data object - you may
>> >>>> want to derive your vtkTest class from one of the vtkDataObject
>> >>>> ParaView works with, e.g., vtkTable.
>> >>>>
>> >>>> Thanks,
>> >>>> Cory
>> >>>>
>> >>>> On Thu, Jul 7, 2016 at 1:44 AM, corinna reuter
>> >>>> <corinnareuter75 at gmail.com> wrote:
>> >>>> > Doesn't anybody know, why a vtkAlgorithm which produces a custom
>> >>>> > class
>> >>>> > (vtkTest) that is not derived from vtkDataSet show the error "...
>> >>>> > but
>> >>>> > a
>> >>>> > vtkPolyData is required"?
>> >>>> >
>> >>>> > A side remark, previously I wrote that the custom class "vtkTest"
>> >>>> > is
>> >>>> > neither
>> >>>> > derived from vtkDataSet nor from vtkDataObject. Actually it is
>> >>>> > derived
>> >>>> > from
>> >>>> > vtkDataObject.
>> >>>> >
>> >>>> > If my question doesn't make sense, please let me know. Maybe it is
>> >>>> > against
>> >>>> > every paraview design, so that I'll have to find a completely
>> >>>> > different
>> >>>> > solution. But it becomes more and more urgent for me to include a
>> >>>> > data
>> >>>> > source (mySQL database) of custom classes (not vtkDataSets) in the
>> >>>> > paraview
>> >>>> > tree.
>> >>>> >
>> >>>> > Thank you
>> >>>> > Corinna
>> >>>> >
>> >>>> > On Mon, Jul 4, 2016 at 3:09 PM, corinna reuter
>> >>>> > <corinnareuter75 at gmail.com>
>> >>>> > wrote:
>> >>>> >>
>> >>>> >> To anybody experienced in plugin programming:
>> >>>> >>
>> >>>> >> I am trying to include items in the paraview tree, which are not
>> >>>> >> derived
>> >>>> >> from vtkDataSet or vtkDataObject. For example, a mySQL database
>> >>>> >> should be
>> >>>> >> allowed as a data source, which delivers data in an intermediate
>> >>>> >> format.
>> >>>> >> Next I'd implement filters which take the intermediate format and
>> >>>> >> produce
>> >>>> >> vtkDataSets as output.
>> >>>> >>
>> >>>> >> Is it possible to use such "abstract" (not vtkDataSet) objects in
>> >>>> >> the
>> >>>> >> paraview tree as a representation of the intermediate format? I
>> >>>> >> have
>> >>>> >> tried
>> >>>> >> to integrate the example for custom classes from
>> >>>> >> http://www.vtk.org/Wiki/VTK_Examples_vtkAlgorithm_Source into a
>> >>>> >> paraview
>> >>>> >> plugin (CMakeLists and servermanager xml below). When the plugin
>> >>>> >> is
>> >>>> >> loaded
>> >>>> >> and I add a source of the new type AlgorithmSourceExample, this
>> >>>> >> error
>> >>>> >> is
>> >>>> >> thrown:
>> >>>> >>
>> >>>> >> ERROR: In
>> >>>> >>
>> >>>> >>
>> >>>> >> /opt/ParaView-v5.0.1/VTK/Common/ExecutionModel/vtkDemandDrivenPipeline.cxx,
>> >>>> >> line 810
>> >>>> >> vtkPVPostFilterExecutive (0x3857810): Input for connection index 0
>> >>>> >> on
>> >>>> >> input port index 0 for algorithm vtkPVPostFilter(0x3858910) is of
>> >>>> >> type
>> >>>> >> vtkTest, but a vtkPolyData is required.
>> >>>> >>
>> >>>> >> What do I need to change such that the vtkTest objects, produced
>> >>>> >> by
>> >>>> >> AlgorithmSourceExample, can live in the paraview tree?
>> >>>> >>
>> >>>> >> Thank you
>> >>>> >> Corinna
>> >>>> >>
>> >>>> >> CMakeLists.txt:
>> >>>> >>
>> >>>> >> FIND_PACKAGE(ParaView REQUIRED)
>> >>>> >> INCLUDE(${PARAVIEW_USE_FILE})
>> >>>> >> #changes required in
>> >>>> >> http://www.vtk.org/Wiki/VTK_Examples_vtkAlgorithm_Source:
>> >>>> >> # remove vtkCxxRevisionMacro calls
>> >>>> >> # change vtkTypeRevisionMacro into vtkTypeMacro
>> >>>> >> # remove call output->SetPipelineInformation( outInfo );
>> >>>> >>  ADD_PARAVIEW_PLUGIN(
>> >>>> >>    AlgorithmSourceExample
>> >>>> >>   "1.0"
>> >>>> >>    SERVER_MANAGER_XML AlgorithmSourceExample.xml
>> >>>> >>    SERVER_MANAGER_SOURCES vtkTestSource.cxx vtkTest.cxx
>> >>>> >>  )
>> >>>> >>
>> >>>> >> AlgorithmSourceExample.xml:
>> >>>> >>
>> >>>> >> <ServerManagerConfiguration>
>> >>>> >>   <ProxyGroup name="sources">
>> >>>> >>    <SourceProxy name="AlgorithmSourceExample"
>> >>>> >> class="vtkTestSource"
>> >>>> >> label="AlgorithmSourceExample">
>> >>>> >>      <Documentation
>> >>>> >>         long_help="AlgorithmSourceExample"
>> >>>> >>         short_help="AlgorithmSourceExample">
>> >>>> >>      </Documentation>
>> >>>> >>    </SourceProxy>
>> >>>> >>  </ProxyGroup>
>> >>>> >> </ServerManagerConfiguration>
>> >>>> >
>> >>>> >
>> >>>> >
>> >>>> > _______________________________________________
>> >>>> > 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
>> >>>> >
>> >>>> > Search the list archives at: http://markmail.org/search/?q=ParaView
>> >>>> >
>> >>>> > Follow this link to subscribe/unsubscribe:
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>> >>>> >
>> >>>>
>> >>>>
>> >>>>
>> >>>> --
>> >>>> Cory Quammen
>> >>>> R&D Engineer
>> >>>> Kitware, Inc.
>> >>>
>> >>>
>> >>
>> >
>>
>>
>>
>> --
>> Cory Quammen
>> R&D Engineer
>> Kitware, Inc.
>
>
>

-- 
Cory Quammen
R&D Engineer
Kitware, Inc.