[Paraview] Octree Mesh

[Berk Geveci]

> I also tried looking for filters that can create quad cells, but I couldn't
> find it. I would greatly appreciate any help in finding such a filter.

I am not sure what you mean by this.

-berk

On Thu, Jan 14, 2010 at 1:40 PM, Mohammad Mirzadeh <mirzadeh at gmail.com> wrote:
> Hi all,
>
> Thanks so much for your help guys. As far as Ivo noted I tried the extract
> cells by region filter and that seems to do the work, only the cells are in
> 3D - which kinda make sense because my original data is 3D.
> As a matter of fact I have been able to import my Octree mesh and data into
> Paraview using existing datasets (right now I am using Unstructured) and
> other than the problem with slicing, everything else seems to work fine so
> right now I think I am not in urgent need of native Octree support.
> I also tried looking for filters that can create quad cells, but I couldn't
> find it. I would greatly appreciate any help in finding such a filter.
> Thanks,
> Mohammad
>
> On Thu, Jan 14, 2010 at 4:42 AM, Berk Geveci <berk.geveci at kitware.com>
> wrote:
>>
>> Hi M,
>>
>> > I am rather new to paraview and I work in the area of CSE. The typical
>> > meshes that I use to discretize my PDEs over is the 3D Octree data
>> > structure. I was just wondering if anyone is aware of a dedicated
>> > dataset in
>> > paraview to handle such meshes? I can go ahead and export my data in a
>> > way
>> > that can be loaded as an unstructured dataset, but I'd prefer to use a
>> > specific dataset for Octrees.
>>
>> We actually have native support for octree datasets - try Sources ->
>> Octree Fractal.
>> There has been very little use of this dataset and I found that the
>> reader/writer for
>> it are not enabled. If you are willing to compile ParaView from
>> source, I can make
>> the necessary changes to our development version. Let me know.
>>
>> > One more question. When I use, say, a simple structured 3D mesh and use
>> > the
>> > slice filter to generate the corresponding mesh on a surface(through
>> > wireframe) it just shows me some extra diagonal lines on each square
>> > cell,
>> > which it should not.
>>
>> This is the way the slice filter works - it creates triangles rather
>> than quads. I believe
>> that there is a filter, somewhere, that generates quads for the case
>> of (structured
>> data, planar slice). I'll ask the author of that filter its status.
>>
>> -berk
>>
>> On Tue, Jan 12, 2010 at 4:00 PM, Mohammad Mirzadeh <mirzadeh at gmail.com>
>> wrote:
>> > Dear all,
>> > I am rather new to paraview and I work in the area of CSE. The typical
>> > meshes that I use to discretize my PDEs over is the 3D Octree data
>> > structure. I was just wondering if anyone is aware of a dedicated
>> > dataset in
>> > paraview to handle such meshes? I can go ahead and export my data in a
>> > way
>> > that can be loaded as an unstructured dataset, but I'd prefer to use a
>> > specific dataset for Octrees.
>> > One more question. When I use, say, a simple structured 3D mesh and use
>> > the
>> > slice filter to generate the corresponding mesh on a surface(through
>> > wireframe) it just shows me some extra diagonal lines on each square
>> > cell,
>> > which it should not.
>> > Any help will greatly be appreciated.
>> > Best,
>> > -M
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