[vtkusers] Bug in vtkLoopSubdivision, was Re: Create an actual mesh from a set of "connected" triangles
David Thompson
dcthomp at sandia.gov
Mon Mar 23 17:07:03 EDT 2009
> Bah sorry, I turned on debug symbols and re-ran it:
> http://rpi.edu/~doriad/output.txt
Well, one problem is that the file you're using contains vertex cells as
well as triangles. Removing those cells (use vtkTriangleFilter with
PassVertsOff()... and PassLinesOff() wouldn't hurt either) will get the
Subdivision filter in ParaView running without crashing.
There are still problems with the vtkLoopSubdivision filter but I just
don't have the time to track it down right now. Please file a bug report
and attach the example polydata to it...
David
>
> On Sun, Mar 22, 2009 at 12:57 PM, Thompson, David C
> <dcthomp at sandia.gov> wrote:
> It helps a little bit, but unfortunately you're using ParaView
> compiled
> without debug information so I cannot tell where in the
> routines
> mentioned the problem is occurring. I'll take a look at it on
> Monday
> when I am at my development machine.
>
> David
> ________________________________________
> From: vtkusers-bounces at vtk.org [vtkusers-bounces at vtk.org] On
> Behalf Of David Doria [daviddoria at gmail.com]
>
> Sent: Sunday, March 22, 2009 05:22
> To: vtkusers at vtk.org
> Subject: Re: [vtkusers] Create an actual mesh from a set of
> "connected" triangles
>
>
> I ran it with valgrind and here is the output:
> http://rpi.edu/~doriad/output.txt
>
> Does that help anyone?
>
> Thanks,
>
> David
>
>
>
> On Sun, Mar 22, 2009 at 3:17 AM, Thompson, David C
> <dcthomp at sandia.gov<mailto:dcthomp at sandia.gov>> wrote:
> Well, ParaView should never crash so I would say you have
> found a bug. I looked at the file you put up and it didn't
> appear to have problems in the connectivity array so running
> ParaView through valgrind is the next step but I don't have
> the time to do that right now. I was able to replicate your
> crash, though.
>
> David
> ________________________________________
>
> From:
> vtkusers-bounces at vtk.org<mailto:vtkusers-bounces at vtk.org>
> [vtkusers-bounces at vtk.org<mailto:vtkusers-bounces at vtk.org>] On
> Behalf Of David Doria
> [daviddoria at gmail.com<mailto:daviddoria at gmail.com>]
> Sent: Saturday, March 21, 2009 10:50
>
> To: vtkusers at vtk.org<mailto:vtkusers at vtk.org>
> Subject: Re: [vtkusers] Create an actual mesh from a set of
> "connected" triangles
>
>
> I don't understand how the mesh can be broken? The cells
> (triangles) are a function of the points, so if the triangles
> look correct the connectivity info should implicitly be there,
> no? So there is not a way to take triangles that look like a
> mesh and make them into an actual mesh in the paraview/vtk
> framework?
>
> Thanks,
>
> David
>
>
>
> On Sat, Mar 21, 2009 at 1:47 PM, Dominik Szczerba
> <dominik at itis.ethz.ch<mailto:dominik at itis.ethz.ch><mailto:dominik at itis.ethz.ch<mailto:dominik at itis.ethz.ch>>> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> well if the mesh is arbitrarily broken then VTK will not help
> you. you
> may need a meshing application.
>
> David Doria wrote:
> > When I do "Clean to grid" and then "Extract surface", and
> then
> > "Subdivide", the subdivide filter still crashes.
> >
> > Thanks,
> >
> > David
> >
> >
> > On Sat, Mar 21, 2009 at 1:30 PM, Thompson, David C
> <dcthomp at sandia.gov<mailto:dcthomp at sandia.gov><mailto:dcthomp at sandia.gov<mailto:dcthomp at sandia.gov>>
>
> >
> <mailto:dcthomp at sandia.gov<mailto:dcthomp at sandia.gov><mailto:dcthomp at sandia.gov<mailto:dcthomp at sandia.gov>>>> wrote:
> >
> > "Clean to grid" creates an unstructured grid. If you use
> it, you
> > must convert
> > the model back to polydata with "Extract surface." Or
> you can use the
> > vtkCleanPolyData filter with PointMergingOn().
> >
> > David
> > ________________________________________
>
> > From:
> vtkusers-bounces at vtk.org<mailto:vtkusers-bounces at vtk.org><mailto:vtkusers-bounces at vtk.org<mailto:vtkusers-bounces at vtk.org>> <mailto:vtkusers-bounces at vtk.org<mailto:vtkusers-bounces at vtk.org><mailto:vtkusers-bounces at vtk.org<mailto:vtkusers-bounces at vtk.org>>>
> >
> [vtkusers-bounces at vtk.org<mailto:vtkusers-bounces at vtk.org><mailto:vtkusers-bounces at vtk.org<mailto:vtkusers-bounces at vtk.org>> <mailto:vtkusers-bounces at vtk.org<mailto:vtkusers-bounces at vtk.org><mailto:vtkusers-bounces at vtk.org<mailto:vtkusers-bounces at vtk.org>>>] On
> > Behalf Of David Doria
> [daviddoria at gmail.com<mailto:daviddoria at gmail.com><mailto:daviddoria at gmail.com<mailto:daviddoria at gmail.com>>
>
> >
> <mailto:daviddoria at gmail.com<mailto:daviddoria at gmail.com><mailto:daviddoria at gmail.com<mailto:daviddoria at gmail.com>>>]
> > Sent: Saturday, March 21, 2009 10:29
> > To: Dominik Szczerba
>
> > Cc:
> vtkusers at vtk.org<mailto:vtkusers at vtk.org><mailto:vtkusers at vtk.org<mailto:vtkusers at vtk.org>> <mailto:vtkusers at vtk.org<mailto:vtkusers at vtk.org><mailto:vtkusers at vtk.org<mailto:vtkusers at vtk.org>>>
> > Subject: Re: [vtkusers] Create an actual mesh from a set
> of
> > "connected" triangles
> >
> > Using paraview, once I do "clean to grid", none of the
> meshing
> > operations (subdivide, Loop subdivision) are available.
> >
> > Thanks,
> >
> > David
> >
> >
> > 2009/3/21 Dominik Szczerba
> <dominik at itis.ethz.ch<mailto:dominik at itis.ethz.ch><mailto:dominik at itis.ethz.ch<mailto:dominik at itis.ethz.ch>>
>
> >
> <mailto:dominik at itis.ethz.ch<mailto:dominik at itis.ethz.ch><mailto:dominik at itis.ethz.ch<mailto:dominik at itis.ethz.ch>>><mailto:dominik at itis.ethz.ch<mailto:dominik at itis.ethz.ch><mailto:dominik at itis.ethz.ch<mailto:dominik at itis.ethz.ch>>
> >
> <mailto:dominik at itis.ethz.ch<mailto:dominik at itis.ethz.ch><mailto:dominik at itis.ethz.ch<mailto:dominik at itis.ethz.ch>>>>>
> > try clean to grid
> >
> > David Doria wrote:
> >> I have a vtp file where the triangles look connected, but
> the file
> >> apparently doesn't think they are (none of the mesh
> operations work).
> >
> >> http://rpi.edu/~doriad/dolphin.vtp<http://rpi.edu/%
> 7Edoriad/dolphin.vtp><http://rpi.edu/%7Edoriad/dolphin.vtp>
> > <http://rpi.edu/%7Edoriad/dolphin.vtp><http://rpi.edu/%
> 7Edoriad/dolphin.vtp>
> >
> >> Is there a filter that will get these triangles into a
> usable mesh?
> >
> >> Thanks,
> >
> >> David
> >
> >
> >
> >
> >
> ------------------------------------------------------------------------
> >
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>
> - --
> Dominik Szczerba, PhD
> Computational Physics Group
> IT'IS Foundation for Research
>
> www.itis.ethz.ch<http://www.itis.ethz.ch><http://www.itis.ethz.ch>
>
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