[Paraview] use of global variables in paraview

[Felipe Bordeu]

Hi,

I finally came to a solution for this problem, some changes are needed 
in VTK and in Paraview,

http://paraview.org/Bug/view.php?id=5626
http://paraview.org/Bug/view.php?id=12778

It look correct to me, the only problem is that we cant treat point/cell 
data fields and field data with the same names. (I don't know how to 
solve this)

Also not all the filters propagate the field data, for example 
CleanToGrid and D3 (see http://paraview.org/Bug/view.php?id=10787, and 
http://paraview.org/Bug/view.php?id=12777)

note: I also did some modification for the python calculator, but the 
code in not very clean.

Felipe


On 12/10/2011 11:00, Felipe Bordeu wrote:
> Sven,
>
> Thank very much for the info. With your filters an the changes to my 
> home made paraview, I'm able to do what I want.
>
> I put some changer in the bugs report.
>
> changes to use fielddata in the pythoncalculator.
> http://www.paraview.org/Bug/view.php?id=5626.
> change to pass the fieldata
> http://www.paraview.org/Bug/view.php?id=10787.
>
> Felipe
>
> On 09/10/2011 09:11, Sven Buijssen wrote:
>> Felipe,
>>
>> The Calculator filter has no support for field data currently, see e.g.
>> http://www.paraview.org/Bug/view.php?id=5626. Neither it is the only
>> filter that does not pass field data, see e.g.
>> http://www.paraview.org/Bug/view.php?id=10787.
>>
>> For operations involving field data, like plotting field data over time
>> or some trivial calculations, I resort to the Programmable Filter.
>>
>> Here's an example pipeline that first adds a source, then adds some
>> vector point data to operate on and a single scalar value as field data
>> to eventually scale an input (point data) data array (stored in the
>> first non-multi-block leaf of a multi-block dataset) by (the first
>> component of) the first tuple of a given name data array stored as field
>> data and add the result as a new data array.
>>
>>      Sources - Wavelet - Apply
>>      Filters - Programmable Filter -
>>          Script: see add.scalarValue.as.fieldData.py - Apply
>>      Filters - Random Vectors - Apply
>>      Filters - Programmable Filter -
>>          Script: see scale.pointData.by.fieldDataValue.py - Apply
>>
>> It should get you started. Changing the script to work on cell data or
>> with a different input data array/field data tuple is straightforward.
>>
>> Sven
>>
>>
>>
>> Felipe Bordeu wrote, On 07.10.2011 19:15:
>>> Hello everybody,
>>>
>>> I have a custom reader, and I generate cells and points data correctly.
>>> Now I am trying to put global data (like material propeties) in a
>>> vtkFieldData using
>>>
>>> ouput->SetFieldData(my_vtkfielddata);
>>>
>>> This work properly and I can see the information in the information tab
>>> (variable Y).
>>>
>>>
>>> But the problem is I am unable to access this information in 
>>> paraview, I
>>> cant use the variable in the calculator, and if apply the calculator
>>> filter the global fields are not passed to the output.
>>>
>>> How can I access this kind of information in the calculator??
>>>
>>> I am using the 3.12.0-RC2 from git in linux, and a custom reader in 
>>> c++.
>>>
>>>
>>> -- 
>>>
>>> Felipe Bordeu Weldt
>>> Ingénieur de Recherche
>>> -------------------------------------
>>> Tél. : 33 (0)2 40 37 16 57
>>> Fax. : 33 (0)2 40 74 74 06
>>> Felipe.Bordeu at ec-nantes.fr
>>> Institut GeM - UMR CNRS 6183
>>> École Centrale Nantes
>>> 1 Rue de La Noë, 44321 Nantes, FRANCE
>>> -------------------------------------
>
>


-- 

Felipe Bordeu Weldt
Ingénieur de Recherche
-------------------------------------
Tél. : 33 (0)2 40 37 16 57
Fax. : 33 (0)2 40 74 74 06
Felipe.Bordeu at ec-nantes.fr
Institut GeM - UMR CNRS 6183
École Centrale Nantes
1 Rue de La Noë, 44321 Nantes, FRANCE
-------------------------------------