[Paraview] Method to Clip Sources & View Closed Volumes?

[Cory Quammen]

Joel,

Alas, there is nothing built in to ParaView to do this. It's possible that
Computational Model Builder (http://www.computationalmodelbuilder.org/),
which is based on ParaView, better supports your use case, but I'm not
familiar enough with it to say so for sure.

Best regards,
Cory

On Sat, Jun 3, 2017 at 7:34 PM, Joel Kulesza <jkulesza at umich.edu> wrote:

> Cory,
>
> Thanks for the reply.  Indeed, that's what I suspected was the case and
> it's all reasonable.  I was just hoping there might be a way to set a
> preference (or another mechanism) so that when a user applied "clip" it
> would perform the manipulations necessary to "see" the interior as a solid
> region.
>
> I tried applying the Deluanay3D filter to my sphere (80 theta & 80 phi
> segments) and got a broken triangularization.  For more complicated shapes,
> I'm concerned I'll have a similar result.
>
> Perhaps asking my question another way: is there a recommended approach to
> converting constructive solid geometry (CSG, which is effectively only
> concerned with boundaries) to something that could be viewed in ParaView
> with filters like "clip" meaningfully applied to see the interior regions
> (because the end-user may be interested in that internal structure).  For
> example, if I had several nested spherical shells defined with CSG, I'd
> like to clip them and see those shells and not just the surfaces between
> them.
>
> Thanks,
> Joel
>
> On Sat, Jun 3, 2017 at 1:56 PM, Cory Quammen <cory.quammen at kitware.com>
> wrote:
>
>> Joel,
>>
>> What you are seeing with the clipped sphere is indeed the clipped
>> polygonal data from the sphere source. The sphere source does not
>> produce volumetric cells inside the surface that you see, so there are
>> no internal cells that would be clipped and produce the filled
>> appearance you are after.
>>
>> I'm betting the VTK dataset you viewed has volumetric cells. In that
>> case, you will see the surface of the clipped volumetric cells.
>>
>> You would need to fill the interior of polygonal datasets with
>> volumetric cells through some kind of meshing procedure. In ParaView,
>> that is pretty much limited to the Delaunay 3D filter, and it works
>> fine if your polygonal dataset defines a convex volume. But there is
>> no option to set that will do this automatically.
>>
>> - Cory
>>
>> On Sat, Jun 3, 2017 at 9:08 AM, Joel Kulesza <jkulesza at umich.edu> wrote:
>> > Colleagues,
>> >
>> > Is there an option I'm not finding that would allow me to continually
>> render
>> > sources as solid volumes rather than shells?
>> >
>> > For example, if I plot a VTK data set and "clip" it, I see all internal
>> > structure (because there is some).
>> >
>> > However, if I plot a Sphere and "clip" it, I see a spherical shell (see
>> > attached).  I understand why this is, but I'd prefer to have the shell
>> > capped so I have what appears to be a solid hemisphere.
>> >
>> > Any thoughts you can provide are appreciated!
>> >
>> > Thank you,
>> > Joel
>> >
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>>
>>
>> --
>> Cory Quammen
>> Staff R&D Engineer
>> Kitware, Inc.
>>
>
>


-- 
Cory Quammen
Staff R&D Engineer
Kitware, Inc.
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