[Paraview] vtkCellLocator: Python

[Utkarsh Ayachit]

The following example shows how to create an iterator to iterate over
all blocks in a composite dataset. The iterator
(http://www.vtk.org/doc/nightly/html/classvtkCompositeDataIterator.html)
has methods like HasCurrentMetaData(), GetCurrentMetaData() that you
can use to get the meta-data for the current block. Note that by
default the iterator skips over non-leaf nodes. If you want to access
those, use VisitOnlyLeavesOff() on the iterator.

http://www.itk.org/Wiki/Python_Programmable_Filter#Dealing_with_Composite_Datasets

Utkarsh

On Sat, May 29, 2010 at 1:15 PM, BastiL2001 <bastil2001 at yahoo.de> wrote:
> Thanks Andi,
>
> I don't know since the ensight reader does this for me. I want to work with
> the input he produces.
>
> Is it in any way possible to link GetMetaData to the current block? Afaik I
> can not query each blocks meta-Data, can I?
>
> Are you naming the block in the meta-data?  In vtkCompositeDataSet there is
> a method called GetMetaData
> (http://www.vtk.org/doc/nightly/html/classvtkCompositeDataSet.html#abcf79d23fc3a67138da3336e4cda2afe)
> that may be what you're looking for.
>
> Andy
>
> On Fri, May 28, 2010 at 3:58 PM, BastiL2001 <bastil2001 at yahoo.de> wrote:
>>
>> Thanks Andi,
>>
>> I will do this. What I am planning to do is to create a scalr field with
>> some distance information as an output.
>>
>> Another issue: I want to loop oder a multi-block dataset with an iterator
>> in a programmable filter (works) and find out the name of the currently
>> visited block. Is that possible? Thanks.
>>
>> Regards Bastian
>>
>> ________________________________
>> Von: pat marion <pat.marion at kitware.com>
>> An: Utkarsh Ayachit <utkarsh.ayachit at kitware.com>
>> CC: Andy Bauer <andy.bauer at kitware.com>; "Bastil2001 at yahoo.de"
>> <Bastil2001 at yahoo.de>; ParaView <paraview at paraview.org>
>> Gesendet: Freitag, den 28. Mai 2010, 16:59:07 Uhr
>> Betreff: Re: [Paraview] vtkCellLocator: Python
>>
>> Unfortunately some of the locator api is pass by reference and therefore
>> not wrapped by python.  Bastian, let us know if you run into missing methods
>> when trying to use the cell locator in python.
>>
>> Pat
>>
>> On Fri, May 28, 2010 at 10:31 AM, Utkarsh Ayachit
>> <utkarsh.ayachit at kitware.com> wrote:
>>>
>>> Andy,
>>>
>>> Bastian wants to use the cell locator in a python programmable --
>>> which won't involve any fetching.
>>>
>>> Bastian,
>>> You can create a cell locator in your programmable filter simply by:
>>>
>>> locator = vtk.vtkCellLocator()
>>>
>>>
>>> Utkarsh
>>>
>>>
>>>
>>>
>>> On Fri, May 28, 2010 at 10:22 AM, Andy Bauer <andy.bauer at kitware.com>
>>> wrote:
>>> > My guess is that you'll want to use a filter to get access to the cell
>>> > locator.  What's the desired output for this?
>>> >
>>> > You could also fetch the data set to the client and then use the vtk
>>> > wrapped
>>> > classes in paraview.vtk to use the cell locator if the class has been
>>> > wrapped but the fetch operation should be used with caution.
>>> >
>>> > Andy
>>> >
>>> > On Thu, May 27, 2010 at 5:55 PM, Bastil2001 at yahoo.de
>>> > <Bastil2001 at yahoo.de>
>>> > wrote:
>>> >>
>>> >> Dear all,
>>> >>
>>> >> can I use vtkCellLocator from within Pyhon oder the Python
>>> >> programmable
>>> >> filter? If yes, how? Or do I need to write my own filter in c++?
>>> >> Thanks.
>>> >>
>>> >> Regards Bastian
>>> >> _______________________________________________
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>>> >
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>>
>>
>
>
>
> _______________________________________________
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>
> Visit other Kitware open-source projects at
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> Please keep messages on-topic and check the ParaView Wiki at:
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>
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>