RES: [Paraview] Volume computation

Sat Nov 11 20:10:18 EST 2006

>>> I would verify the integration results before trusting them 100%. <<<

I see... if it helps you in anything I'm sending some "benchmark" results.

The disk has diameter 30 and height 0.5. The slot has width 5, length 25 and
height .5, thus:

V_cylinder = H x (pi*D^2)/4 = 353.429

V_slot = W x L x H = 5 x 25 x .5 = 62.5

V_disk = V_cylinder - V_slot = 290.929

I tested the integration attributed filter computing the volume from the
clip and the threshold filters. As you can see by the images

http://www.nacad.ufrj.br/~rnelias/paraview/clip.jpg

http://www.nacad.ufrj.br/~rnelias/paraview/threshold.JPG

the clip data resulted the volume 227.874 (not so good) while the threshold
produced the volume 290.919 (almost perfect!).

Can you figure out why the results were different if the datasets are quite
similar?

Regards

Renato.

p.s.: Other useful parameters:
The clip filter grouped 4033 cells, 1494 points and polygon count 4033
The Threshold filter grouped 4037 cells, 1494 points and polygon count 4037
4 tets giving a difference of 63.045?! These tets have 0.5 of height at
most.

-----Mensagem original-----
De: Berk Geveci [mailto:berk.geveci at kitware.com] 
Enviada em: sábado, 11 de novembro de 2006 15:58
Para: Renato N. Elias
Cc: paraview at paraview.org
Assunto: Re: [Paraview] Volume computation

I am glad you got it to work. A word of caution: that is a new feature. I
would verify the integration results before trusting them 100%.

-berk

On 11/11/06, Renato N. Elias <rnelias at nacad.ufrj.br> wrote:
>
> (abashed) What a shame... just for completeness: I haven't noticed 
> that the "integrate attributes" had worked in both cases with the clip 
> and the threshold filter as well.
>
> It gives you an idea of how crazy I've been. Overwork + no time = 
> insanity
> ;o)
>
> Renato.
>
> -----Mensagem original-----
> De: paraview-bounces+rnelias=nacad.ufrj.br at paraview.org
> [mailto:paraview-bounces+rnelias=nacad.ufrj.br at paraview.org] Em nome 
> de Renato N. Elias Enviada em: sábado, 11 de novembro de 2006 16:16
> Para: 'Berk Geveci'; paraview at paraview.org
> Assunto: ENC: [Paraview] Volume computation
>
>
> Berk, forget about the previous message. I found what I did wrong! I 
> was using the clip filter instead of threshold. take a look 
> http://www.nacad.ufrj.br/~rnelias/paraview/PV-screen-correct.JPG. Now 
> it works perfectly ;o)
>
> thanks for your hint.
>
> Renato.
>
>
> -----Mensagem original-----
> De: Renato N. Elias [mailto:rnelias at nacad.ufrj.br] Enviada em: sábado, 
> 11 de novembro de 2006 15:53
> Para: 'Berk Geveci'
> Cc: 'paraview at paraview.org'
> Assunto: RES: [Paraview] Volume computation
>
>
> Hi Berk,
>
> It doesn't seem to be working yet (at least to solve this specific
problem).
> I checked out the PV HEAD today (11th saturday) and compiled with 
> VS2003 (I gave up to use VS2005, but it's another history). My problem 
> is that I'd like to compare the volume preservation in a Zalesak's 
> rotation disk problem. This volume itself is not so hard to compute 
> but, actually, I'm questioning the results obtained from the routine I 
> wrote. In this way I'd like to load my data in PV, clip the data using 
> an scalar value greater a value (0.5 in my case) and compute the 
> volume of the clipped data. The following screen 
> http://www.nacad.ufrj.br/~rnelias/paraview/PV-screen.JPG
> gives you an idea of the problem.
>
> is it possible to do?! What am I missing?
>
> p.s.: I also tried with the PV3 november's snapshot. Now the Ensight 
> reader seems to be working correctly to load steady state data but the 
> clip filter in PV3 does not have all features available in 2.4.x PV
versions yet.
>
> Regards
>
> Renato.
>
> ________________________________
>
> De: Berk Geveci [mailto:berk.geveci at kitware.com] Enviada em: 
> quarta-feira, 8 de novembro de 2006 16:41
> Para: rnelias
> Cc: paraview at paraview.org
> Assunto: Re: [Paraview] Volume computation
>
>
> This is possible with the CVS version of ParaView using Integrate 
> Attributes.
>
> -berk
>
>
> On 11/8/06, rnelias < rnelias at nacad.ufrj.br 
> <mailto:rnelias at nacad.ufrj.br> >
> wrote:
>
>
>         Hi all,
>
>         Does anybody know if PV can compute the volume of datasets? I 
> have a domain
>         which after applying the clip filter gives me a portion which 
> I'd like to
>         know its volume. Is it possible to do it with PV?
>
>         Thanks for any help
>
>         Renato.
>
>         _______________________________________________
>         ParaView mailing list
>         ParaView at paraview.org
>         http://www.paraview.org/mailman/listinfo/paraview
>
>
>
>
>
> --
> Berk Geveci
> Kitware Inc.
> 28 Corporate Drive
> Clifton Park, NY, 12309
>
> _______________________________________________
> ParaView mailing list
> ParaView at paraview.org
> http://www.paraview.org/mailman/listinfo/paraview
>
> _______________________________________________
> ParaView mailing list
> ParaView at paraview.org
> http://www.paraview.org/mailman/listinfo/paraview
>

--
 Berk Geveci
 Kitware Inc.
 28 Corporate Drive
 Clifton Park, NY, 12309