[vtkusers] Request info about changes made to vtkRuledSurfaceFilter vtkAppendPolyData after 5.2.1

David E DeMarle dave.demarle at kitware.com
Tue Sep 9 16:44:48 EDT 2014

Try this from a git checkout at the v5.10 (before modularization) tag:
git log v5.2.0...v5.8.0 --follow Graphics/vtkAppendPolyData.cxx
git log v5.2.0...v5.8.0 --follow Graphics/vtkRuledSurfaceFilter.cxx

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909

On Tue, Sep 9, 2014 at 3:58 PM, Aaron Hickerson <
aaron.hickerson at ondiagnostics.com> wrote:

> Hello,
> I am in the process of upgrading my company OS from ubuntu10 to ubuntu14
> and so I am therefore dealing with an upgrade of vtk 5.2.1 to vtk 5.8. Our
> legacy software is heavily dependent on vtk and we are noticing some
> unexpected differences in outcomes with the newer 5.8 library. These
> differences are slight but for our regulated software we need to know why
> there are ANY differences in outcomes for this new release, no matter how
> small.
> There were changes made to the classes vtkRuledSurfaceFilter and
> vtkAppendPolyData after 5.2.1 but I cannot find any succinct explanations
> as to why these changes were made. These are the two classes that I have
> identified that our software is dependent on that behave differently in
> this new release, and provide different outcomes. I have scoured the
> internet and looked at the source code in detail but I still cannot find
> any real explanation as to WHY these two classes were modified to produce
> different outcomes than in previous versions.
> Can anyone point me to the changelog(s) for these classes that contain
> succinct explanations for the algorithmic changes?
> Thanks,
> Aaron Hickerson
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