[Paraview-developers] [vtk-developers] Ghost and Blanking (Visibility) Changes

[Joachim Pouderoux]

The problem is that we cannot change the behaviour of old code (the one
available in PV <= 4.3.1) so to make them work (as they just refuse to read
files with a version > 1) we have to change the actual writer.

*Joachim Pouderoux*

*PhD, Technical Expert*
*Kitware SAS <http://www.kitware.fr>*


2015-04-14 16:06 GMT+02:00 Dan Lipsa <dan.lipsa at kitware.com>:

>
>>
>> > I use to generate PVTP/PTVU files on a project I generally link with
>> the latest VTK. I use to visualize the obtained dataset with ParaView.
>> However, since this change, I am not able to open any of those VTK XML
>> files with PV <=4.3.1. To do so I have to manually edit the files and
>> reverse the version tag from 2 to 1... My dataset have no blanking or ghost
>> cells, thus may be one could only specify version 2 in the data writer if
>> the data *really *contains information that a previous version of the
>> reader could not read?
>>
>> This is a great idea. Dan: if it is not too hard to do, please do this.
>>
>
> I'll take a look a this. Maybe we should change the readers to only issue
> a warning if the file version is newer than the reader. It should not be a
> problem for old readers to read new files at least in this case - the only
> thing that happens is that ghost levels and blanking are not read correctly
> - this may not matter in certain cases.
>
> Dan
>
>
>
>
>
>
>>
>> -berk
>>
>> On Tue, Apr 14, 2015 at 9:26 AM, Joachim Pouderoux <
>> joachim.pouderoux at kitware.com> wrote:
>>
>>> Thanks, this is good to now.
>>> Question: the new architecture does not provide information about ghost
>>> level anymore. Is this information useless in general and was never used by
>>> any vtk filter?
>>>
>>> Beside that , the change of VTK XML file version induced by this change
>>> can be a problem:
>>> I use to generate PVTP/PTVU files on a project I generally link with the
>>> latest VTK. I use to visualize the obtained dataset with ParaView. However,
>>> since this change, I am not able to open any of those VTK XML files with PV
>>> <=4.3.1. To do so I have to manually edit the files and reverse the version
>>> tag from 2 to 1... My dataset have no blanking or ghost cells, thus may be
>>> one could only specify version 2 in the data writer if the data *really
>>> *contains information that a previous version of the reader could not
>>> read?
>>>
>>> Best,
>>> Joachim
>>>
>>> *Joachim Pouderoux*
>>>
>>> *PhD, Technical Expert*
>>> *Kitware SAS <http://www.kitware.fr>*
>>>
>>>
>>> 2015-04-02 16:54 GMT+02:00 Dan Lipsa <dan.lipsa at kitware.com>:
>>>
>>>>
>>>> Dear VTK and ParaView developers,
>>>> We would like to draw your attention to the following updates to
>>>> VTK/ParaView that change the way one interfaces to Ghost and Blanking cells
>>>> and points.
>>>>
>>>> These changes have just been merged into master repositories for
>>>> VTK/ParaView.
>>>>
>>>> http://www.kitware.com/blog/home/post/856
>>>>
>>>> We welcome suggestions and/or bug reports on these changes.
>>>>
>>>> Best regards,
>>>> Dan
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>
>>
>
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