[Paraview] vtkCellLocator: Python
Utkarsh Ayachit
utkarsh.ayachit at kitware.com
Tue Jun 1 16:40:12 EDT 2010
Try the following:
print iter.GetCurrentMetaData().Get(vtk.vtkCompositeDataSet.NAME())
Utkarsh
On Tue, Jun 1, 2010 at 3:12 PM, Bastil2001 at yahoo.de <Bastil2001 at yahoo.de>wrote:
> Thanks Eric, all,
>
> but this does not seem to work at all. My loop looks something like this:
>
> input = self.GetInputDataObject(0, 0)
> output = self.GetOutputDataObject(0)
> if input.IsA("vtkMultiBlockDataSet"):
> iter = input.NewIterator()
> iter.UnRegister(None)
> iter.InitTraversal()
> i=1
> while not iter.IsDoneWithTraversal():
> curInput = iter.GetCurrentDataObject()
> curInformation = curInput.GetInformation()
> print i
> print iter.GetCurrentMetaData()
> # This is where I want to query for the current name, line does not
> work....
> print iter.GetCurrentMetaData().Get(iter.GetCurrentMetaData.NAME)
> i=i+1
> iter.GoToNextItem();
>
> The output of print iter.GetCurrentMetaData() looks like this:
>
>
> vtkInformation (0x3808f00)
> Debug: Off
> Modified Time: 269417
> Reference Count: 2
> Registered Events: (none)
> DONT_PRUNE: 1
> NAME: my_given_name
>
> I want to work wit the "NAME" attribute ('my_given_name in this case) but
> I don't know how...?
>
> Bastil2001 at yahoo.de wrote:
>
>
>
> -------- Original-Nachricht -------- Betreff: Re: [Paraview]
> vtkCellLocator: Python Datum: Mon, 31 May 2010 15:15:54 -0400 Von: Eric
> E. Monson <emonson at cs.duke.edu> <emonson at cs.duke.edu> An:
> Bastil2001 at yahoo.de CC: Utkarsh Ayachit <utkarsh.ayachit at kitware.com><utkarsh.ayachit at kitware.com>,
> "'ParaView'" <paraview at paraview.org> <paraview at paraview.org>
>
>
> Hey Bastian,
>
> I think you should be able to just use the Get() method to pull out that
> information key. When I want to find current time step information on some
> pipeline data (with a programmable filter), which has information that looks
> like this:
>
> vtkInformation (0x11dd723d0)
> Debug: Off
> Modified Time: 70754
> Reference Count: 2
> Registered Events: (none)
> DATA_NUMBER_OF_GHOST_LEVELS: 0
> DATA_TIME_STEPS: 0
> DATA_PIECE_NUMBER: 0
> DATA_EXTENT_TYPE: 0
> DATA_NUMBER_OF_PIECES: 1
>
> I can do it with these commands:
>
> pdi = self.GetInputDataObject(0,0)
> current_time = pdi.GetInformation().Get(pdi.DATA_TIME_STEPS(),0)
>
> So you might be able to just put NAME() in where I put DATA_TIME_STEPS().
>
> Talk to you later,
> -Eric
>
> ------------------------------------------------------
> Eric E Monson
> Duke Visualization Technology Group
>
>
> On May 31, 2010, at 1:23 PM, Bastil2001 at yahoo.de wrote:
>
> 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> <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> <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> <pat.marion at kitware.com>
> An: Utkarsh Ayachit <utkarsh.ayachit at kitware.com> <utkarsh.ayachit at kitware.com>
> CC: Andy Bauer <andy.bauer at kitware.com> <andy.bauer at kitware.com>; "Bastil2001 at yahoo.de" <Bastil2001 at yahoo.de><Bastil2001 at yahoo.de> <Bastil2001 at yahoo.de>; ParaView <paraview at paraview.org> <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> <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> <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> <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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