[vtkusers] Create an actual mesh from a set of "connected" triangles

[Thompson, David C]

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 [vtkusers-bounces at vtk.org] On Behalf Of David Doria [daviddoria at gmail.com]
Sent: Saturday, March 21, 2009 10:50
To: 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>> wrote:
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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>>> 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>>
>     [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>>]
>     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>>
>     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>>>>
> 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>
>
>> Is there a filter that will get these triangles into a usable mesh?
>
>> Thanks,
>
>> David
>
>
>
>
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>
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- --
Dominik Szczerba, PhD
Computational Physics Group
IT'IS Foundation for Research
www.itis.ethz.ch<http://www.itis.ethz.ch>
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