[Paraview] Multiblock Dataset number of points

[Zhanping Liu]

Hi Renato:

   As I explained to Rafael yesterday, the current version of VTK EnSight
Reader-6 just adopts a storage mechanism complying with the format of
EnSight-6. In other words, a common set of points, in the form of a
vtkPoints object, is created that is then accessed by those constituent
blocks to construct the topology (in the form of tetrahedra, wedges, and so
forth) of the data. The information of each block (shown via ParaView panel)
refers to the number of the aforementioned common / super set of points
(instead of the exact set used to define the block topology). I consulted
our group leader and was told to currently keep this situation as is.

   To add some code to show the exact number of points making a block, I
need to discuss it with our group leader.

   Thanks for your suggestions and the dataset. BTW, your understanding of
the number of points issue is correct.

   -Zhanping
   --
Zhanping Liu, PhD
Kitware, Inc.
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x 138
http://www.zhanpingliu.org



On Mon, Jul 20, 2009 at 9:08 PM, Renato Elias <rnelias at gmail.com> wrote:

> Hi Rafael and Zhanping,
>
> I've found out what is going on. I've loaded the Rafael's dataset (we are
> co-workers at the same lab) in PV-3.6 and PV-3.4 as well. The confusion is
> due to the Ensight file format. Rafael is using Ensight 6 format (not the
> Gold one). In Ensight 6, the point coordinates for the whole grid is firstly
> inserted in the geometry file, in the "coordinates" section, and the
> following parts are defined by cells that use only some of these points.
> Note that the cell parts do not have any information regarding points. Just
> cell incidences are listed. In order to show the correct number of points
> that each part uses, ParaView should have some algorithm to count the points
> actually used.
>
> The main difference between Ensight 6 and Ensight Gold is that in Ensight
> Gold the point coordinates must be informed for each part.
>
> Here goes the data (if you're still interested)
> http://www.nacad.ufrj.br/~rnelias/paraview/Basic_Shape_1.zip
>
> Regards
>
> Renato.
>
>
> On Mon, Jul 20, 2009 at 2:35 PM, Zhanping Liu <zhanping.liu at kitware.com>wrote:
>
>> Hi Rafael:
>>
>>    I notice you are using ParaView 3.4.0, not a update-to-date version.
>> There have been many fixes since it. Any way, I would be glad to check it
>> with the latest version if you could provide the dataset.
>>
>>    -Zhanping
>>
>>   On Mon, Jul 20, 2009 at 1:31 PM, Zhanping Liu <zhanping.liu at kitware.com
>> > wrote:
>>
>>> Hi Rafael:
>>>
>>>     I cannot determine whether or not it is a bug by simply looking at
>>> the snapshot. Would you please provide me with the dataset (the CASE file
>>> and the referenced files) so that I can look into this issue?
>>>
>>>     Thanks.
>>>
>>>     -Zhanping
>>> --
>>> Zhanping Liu, PhD
>>> Kitware, Inc.
>>> 28 Corporate Drive
>>> Clifton Park, NY 12065-8662
>>> Phone: 518-371-3971 x 138
>>> http://www.zhanpingliu.org
>>>
>>>
>>>
>>>   On Mon, Jul 20, 2009 at 1:20 PM, Rafael March <rafaelmarch3 at yahoo.com>wrote:
>>>
>>>>     Hi,
>>>>
>>>> I'm experiencing something weird when opening Ensight case files with
>>>> ParaView.
>>>>
>>>> I am able to open them normally, and ParaView instantiates a Multiblock
>>>> Dataset with the parts corresponding to the ones contained in the .geo file.
>>>> But when I open the model, the "number of points" info in the "information"
>>>> tab doesn't seem to be right. It displays the same number to all the
>>>> components (which does not correspond to the reality) and this number is
>>>> quite larger than the real number of point.
>>>>
>>>> I posted an example in the link below. I opened a Multiblock and
>>>> extracted a block of it. ParaView says it has 38560 points, but it is
>>>> visually obvious that this information is wrong. Is this a bug ?
>>>> http://www.nacad.ufrj.br/~rnelias/paraview/pv-fig-num-points.jpg
>>>>
>>>>
>>>>
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>>>>
>>>
>>>
>>>
>>>
>>
>>
>> --
>> Zhanping Liu, PhD
>> Kitware, Inc.
>> 28 Corporate Drive
>> Clifton Park, NY 12065-8662
>> Phone: 518-371-3971 x 138
>> http://www.zhanpingliu.org
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the ParaView Wiki at:
>> http://paraview.org/Wiki/ParaView
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.paraview.org/mailman/listinfo/paraview
>>
>>
>
>
> --
> Renato N. Elias
> ===================================
> High Performance Computing Center (NACAD)
> Federal University of Rio de Janeiro (UFRJ)
> Rio de Janeiro, Brazil
>
> Sent from Rio de Janeiro, Brasil
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