[Paraview] Data set comparison

Wed Mar 31 06:19:54 EDT 2010

paraview-bounces at paraview.org wrote on 03/30/2010 07:12:48 PM:
> 
> Unfortunately, you have to copy the array with something like:
> 
> copy_array = original_array.NewInstance()
> copy_array.DeepCopy(original_array)
> copy_array.SetName("foo")
> copy_array.UnRegister(None)
> 
> Having said that there might be a better way of doing this. Are you
> planning to use the calculator to compare these arrays later in the
> pipeline?
> 

Dear Berk,
Yes, I'd like to get the difference of the two arrays. 
Maybe I should try to do it directly in the programmable filter and simply 
return the result array...

Any suggestion is welcome...

Thank you very much for your help,
Luca

> -berk
> 
> On Mon, Mar 29, 2010 at 11:34 AM,  <Luca.Clementi at tororosso.com> wrote:
> > Dear Berk,
> >
> > this really helped me a lot, thanks!
> >
> >
> > But now Im stuck with another problem.
> >
> > The scalar value that I'm trying to compare from the two data sets 
have the
> > same names.
> >
> >
> > meanTotalPressure
> >
> >
> > So when I do the AddArray() in my script the second array simply 
overrides
> > the first one.
> >
> > http://www.vtk.org/doc/nightly/html/
> classvtkFieldData.html#a22259e3c071ac8ff7a62ac49e9f1a92e
> >
> >
> > I tried to change the name with SetName() method, but it changes the 
Array
> > name globally, and the second time I run the filter the GetArray 
returns
> > NoneType object.
> >
> >
> > Do I have to copy the object to rename it?
> >
> >
> > Sincerely,
> >
> > Luca
> >
> > -----------------------------------
> >
> > i0 = self.GetInputDataObject(0,0)
> > i1 = self.GetInputDataObject(0,1)
> > o = self.GetOutputDataObject(0)
> > print "the class is: " +
> > str(i0.GetPointData().GetArray("meanTotalPressureMonitor").__class__)
> > array0 = i0.GetPointData().GetArray("meanTotalPressureMonitor")
> > array0.SetName("meanTotalPressure0")
> > o.GetPointData().AddArray(array0)
> > array1 = i1.GetPointData().GetArray("meanTotalPressureMonitor")
> > array1.SetName("meanTotalPressure1")
> > o.GetPointData().AddArray(array1)
> > -----------------------------------
> >
> >
> > Berk Geveci <berk.geveci at kitware.com> wrote on 03/23/2010 08:57:52 PM:
> >>
> >> This is because the EnSight reader produces a multi-block dataset. 
Try
> >> applying Merge Blocks filter first.
> >>
> >> -berk
> >>
> >> On Mon, Mar 22, 2010 at 1:12 PM,  <Luca.Clementi at tororosso.com> 
wrote:
> >> > Hi all,
> >> > Im trying to compare two data sets in Ensight .case format.
> >> >
> >> > I found only this thread referring to data set comparison:
> >> > http://www.cmake.org/pipermail/paraview/2008-November/010034.html
> >> >
> >> > But I could not get it to work. I tried resamply directly the two
> >> > Ensight
> >> > data reader. Then I also tried to filter the two Ensight data 
readers
> >> > through a CellDatatoPointData reader and also through a CellCenter 
(with
> >> > vertex cells active), but I always get:
> >> > ERROR: In
> >> > /home/kitware/ParaView3/Utilities/BuildScripts/ParaView-3.6/
> >> ParaView3/VTK/Filtering/vtkDataSet.cxx,
> >> > line 406
> >> > vtkUnstructuredGrid (0x3a46da0): Point array vtkValidPointMask with 
1
> >> > components, only has 3726 tuples but there are 407364 pointsERROR: 
In
> >> > /home/kitware/ParaView3/Utilities/BuildScripts/ParaView-3.6/
> >> ParaView3/VTK/Filtering/vtkDataSet.cxx,
> >> > line 406
> >> > vtkUnstructuredGrid (0x67183e0): Point array vtkValidPointMask with 
1
> >> > components, only has 3726 tuples but there are 407364 points
> >> >
> >> >
> >> > ERROR: In
> >> > /home/kitware/ParaView3/Utilities/BuildScripts/ParaView-3.6/
> >> ParaView3/VTK/Filtering/vtkExecutive.cxx,
> >> > line 757
> >> > vtkCompositeDataPipeline (0x65c0b20): Algorithm
> >> > vtkPVGeometryFilter(0x65bdb80) returned failure for request:
> >> > vtkInformation (0x67155a0)
> >> >  Debug: Off
> >> >  Modified Time: 13672858
> >> >  Reference Count: 1
> >> >  Registered Events: (none)
> >> >  Request: REQUEST_DATA
> >> >  FROM_OUTPUT_PORT: 0
> >> >  ALGORITHM_AFTER_FORWARD: 1
> >> >  FORWARD_DIRECTION: 0
> >> >
> >> >
> >> > I also tried the programmable filter suggested in the previous 
email,
> >> > (using two input file with the same geometry), but in that case I 
always
> >> > get:
> >> >
> >> > paraview version 3.6.2, Date: 2009-05-18
> >> >
> >> > Traceback (most recent call last):
> >> >  File "<string>", line 25, in <module>
> >> >  File "<string>", line 5, in RequestData
> >> > AttributeError: GetPointData
> >> >
> >> >
> >> > That's the filter Im trying to use:
> >> > i0 = self.GetInputDataObject(0,0)
> >> > i1 = self.GetInputDataObject(0,1)
> >> > o = self.GetOutputDataObject(0)
> >> > o.GetPointData().AddArray(i0.GetPointData().GetArray
> >> ("meanTotalPressureMonitor"))
> >> > o.GetPointData().AddArray(i1.GetPointData().GetArray
> >> ("meanTotalPressureMonitor"))
> >> >
> >> >
> >> > Thank you very much for your help!
> >> >
> >> > Sincerely,
> >> > Luca
> >> >
> >> >
> >> >
> >
> > 
> 
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per la consegna del messaggio al destinatario designato, si informa che ogni disseminazione, distribuzione o copiatura di questa comunicazione è 
strettamente proibita anche ai sensi del decreto legislativo 196/03 . Se avete ricevuto questo messaggio per errore, vi preghiamo di notificarcelo
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