[vtkusers] vtkSurfaceReconstructionFilter

[Tim Hutton]

Jonathan,

Just use vtkTriangleFilter on the output of powercrust.

Tim

On 10/25/05, bailleul jonathan <bailleul at greyc.ensicaen.fr> wrote:
> Dear Tim,
>
> I've tried your VTK port of powercurst with success, but I noticed that
> the resulting surface was made of polygons.
>
> Could you orient me to a method more suited to triangle generation?
>
>
> Best regards,
>
>
> Tim Hutton wrote:
> > You'll need to rebuild VTK with the powercrust class included. This
> > isn't too hard: just add the .cxx and .h files to the Hybrid
> > directory, and add a line saying
> > vtkPowerCrustSurfaceReconstruction.cxx to the CMakeLists.txt file that
> > is there. Then re-run CMake (with the python bindings) and rebuild
> > VTK.
> >
> > (Unless things have changed recently, that is.)
> >
> > Tim
> >
> > On 10/25/05, Rohan Hughes <frostillicusetcetera at hotmail.com> wrote:
> >
> >>Do you know how I get that to work with python? I am unfamiliar with adding
> >>new files to vtk
> >>
> >>Rohan
> >>----- Original Message -----
> >>From: "Tim Hutton" <tim.hutton at gmail.com>
> >>To: "Rohan Hughes" <frostillicusetcetera at hotmail.com>
> >>Cc: <vtkusers at vtk.org>
> >>Sent: Wednesday, October 26, 2005 2:56 AM
> >>Subject: Re: [vtkusers] vtkSurfaceReconstructionFilter
> >>
> >>
> >>Hi Rohan
> >>
> >>Yes, this often happens with vtkSurfaceReconstructionFilter, due to
> >>its requirement that the surface be densely sampled at all points - it
> >>can't cope with open surfaces or with outliers.
> >>
> >>The standard response is to try the powercrust algorithm instead:
> >>vtkPowerCrustSurfaceReconstruction, at:
> >>http://www.sq3.org.uk/powercrust/
> >>
> >>Tim
> >>
> >>On 10/25/05, Rohan Hughes <frostillicusetcetera at hotmail.com> wrote:
> >>
> >>>I have a set of of points that i wish to construct a surface from.
> >>>I firstly just displayed it as a bunch of points (using vtkPolyVertex) and
> >>>it looked like it should.
> >>>I then tried to use vtkSurfaceReconstructionFilter to make a surface. Some
> >>>of the surface turns out ok, but the rest seems to flare out into parts
> >>>where there are no points. I'm quite confused as to why it does that. I
> >>
> >>can
> >>
> >>>only really explain this with a picture
> >>>I also tried to use vtkDelaunay3D but after fiddleling with the SetAlpha()
> >>>and I was able to create a reasonably nice surface. it wasn't as nice as
> >>
> >>the
> >>
> >>>surfaceReconstructionFilter one, and it joined some points that shouldn't
> >>
> >>be
> >>
> >>>joined
> >>>
> >>>I am unsure what I should do next. images are attached if they help
> >>
> >>explain
> >>
> >>>it better
> >>>
> >>>Thank you in advance
> >>>
> >>>Rohan
> >>>_______________________________________________
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> >>>
> >>>
> >>>
> >>>
> >>
> >>
> >>--
> >>Tim Hutton  -  http://www.sq3.org.uk
> >>
> >
> >
> >
> > --
> > Tim Hutton  -  http://www.sq3.org.uk
> > _______________________________________________
> > This is the private VTK discussion list.
> > Please keep messages on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
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> >
>
>
> --
> ---------------------------------------
> Jonathan BAILLEUL, Doctorant
> GREYC Image - Université de Caen / ENSICAEN
> http://www.greyc.ensicaen.fr/~bailleul/
>


--
Tim Hutton  -  http://www.sq3.org.uk