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

[David Doria]

This is very odd - if I triangulate and then decimate, the subdivision stuff
starts to work correctly. It seems like if decimate works, subdivide should
work too?? But if I triangulate and then subdivide, paraview crashes.

Thanks,

David


On Sat, Mar 21, 2009 at 1:50 PM, David Doria <daviddoria at gmail.com> wrote:

> 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>wrote:
>
>> -----BEGIN PGP SIGNED MESSAGE-----
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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>> 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>
>> >     [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 10:29
>> >     To: Dominik Szczerba
>> >     Cc: 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>>>
>> > 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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>> >
>>
>> - --
>> Dominik Szczerba, PhD
>> Computational Physics Group
>> IT'IS Foundation for Research
>> www.itis.ethz.ch
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>
>
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