[Paraview] vtkCellLocator: Python

Mon May 31 13:23:23 EDT 2010

Thanks Utkarsh,

the required information is in MetaData:

print iter.GetCurrentMetaData()

vtkInformation (0x3808f00)
Debug: Off
Modified Time: 269417
Reference Count: 2
Registered Events: (none)
DONT_PRUNE: 1
NAME: my_given_name

Now I want to work with the NAME-Attribute (my_given_name) but I don't
know how to get this into a variable? I can't find a GetName()-Method...

print dir(iter.GetCurrentMetaData())

['AddObserver', 'Append', 'AppendUnique', 'BreakOnError', 'Clear',
'Copy', 'CopyEntries', 'CopyEntry', 'DebugOff', 'DebugOn', 'FastDelete',
'Get', 'GetAddressAsString', 'GetClassName', 'GetDebug',
'GetGlobalWarningDisplay', 'GetKey', 'GetMTime', 'GetNumberOfKeys',
'GetReferenceCount', 'GetRequest', 'GlobalWarningDisplayOff',
'GlobalWarningDisplayOn', 'Has', 'HasObserver', 'InvokeEvent', 'IsA',
'IsTypeOf', 'Length', 'Modified', 'NewInstance', 'PrintRevisions',
'Register', 'Remove', 'RemoveAllObservers', 'RemoveObserver',
'RemoveObservers', 'SafeDownCast', 'Set', 'SetDebug',
'SetGlobalWarningDisplay', 'SetReferenceCount', 'SetRequest', 'UnRegister']

Thanks for help.

Regards Bastian

Am 30.05.2010 16:58, schrieb 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
>>>>>> _______________________________________________
>>>>>> Powered by www.kitware.com
>>>>>>
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>>>>>>             
>>>>>
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>>>>>           
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>>>>         
>>>
>>>       
>>
>>
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>>     
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