[Paraview] Using streamtracer/gradient filters on "multi-block" data set

Wed Mar 2 06:40:44 EST 2011

I looks like you to apply cell data to point data.

On Tue, Mar 1, 2011 at 9:06 PM, Sohail Shafii <sohailshafii at yahoo.com>wrote:

> Hi,
>
> Let me correct myself; the block contained inside is a vtkStructuredGrid.
> I did a printout what is in the pipeline (self.GetInput()):
>
> vtkMultiBlockDataSet (0x3a7c1d0)
>
> Debug: Off
>
> Modified Time: 164250
>
> Reference Count: 2
>
> Registered Events: (none)
>
> Source: (none)
>
> Information: 0x3a7c230
>
> Data Released: False
>
> Global Release Data: Off
>
> UpdateTime: 164282
>
> Release Data: Off
>
> UpdateExtent: Initialized
>
> Update Number Of Pieces: 1
>
> Update Piece: 0
>
> Update Ghost Level: 0
>
> MaximumNumberOfPieces: -1
>
> ExtentTranslator: (0x3a7df30)
>
> RequestExactExtent: Off
>
> Field Data:
>
> Debug: Off
>
> Modified Time: 155460
>
> Reference Count: 1
>
> Registered Events: (none)
>
> Number Of Arrays: 0
>
> Number Of Components: 0
>
> Number Of Tuples: 0
>
> Number Of Children: 1
>
> Child 0: vtkUnstructuredGrid
>
> Debug: Off
>
> Modified Time: 164208
>
> Reference Count: 3
>
> Registered Events: (none)
>
> Source: (none)
>
> Information: 0x4920790
>
> Data Released: False
>
> Global Release Data: Off
>
> UpdateTime: 0
>
> Release Data: Off
>
> UpdateExtent: Not Initialized
>
> MaximumNumberOfPieces: 1
>
> RequestExactExtent: Off
>
> Field Data:
>
> Debug: Off
>
> Modified Time: 164167
>
> Reference Count: 1
>
> Registered Events: (none)
>
> Number Of Arrays: 0
>
> Number Of Components: 0
>
> Number Of Tuples: 0
>
> Number Of Points: 34943
>
> Number Of Cells: 31488
>
> Cell Data:
>
> Debug: Off
>
> Modified Time: 164206
>
> Reference Count: 1
>
> Registered Events: (none)
>
> Number Of Arrays: 24
>
> Array 0 name = PRESSURE
>
> Array 1 name = X_VELOCITY
>
> Array 2 name = X_VELOCITY_M1
>
> Array 3 name = X_VELOCITY_M2
>
> Array 4 name = Y_VELOCITY
>
> Array 5 name = Y_VELOCITY_M1
>
> Array 6 name = Y_VELOCITY_M2
>
> Array 7 name = Z_VELOCITY
>
> Array 8 name = Z_VELOCITY_M1
>
> Array 9 name = Z_VELOCITY_M2
>
> Array 10 name = TEMPERATURE
>
> Array 11 name = ENTHALPY
>
> Array 12 name = ENERGY_M1
>
> Array 13 name = ENERGY_M2
>
> Array 14 name = NUT
>
> Array 15 name = NUT_M1
>
> Array 16 name = NUT_M2
>
> Array 17 name = DENSITY
>
> Array 18 name = DENSITY_M1
>
> Array 19 name = DENSITY_M2
>
> Array 20 name = MU_LAM
>
> Array 21 name = MU_TURB
>
> Array 22 name = WALL_DIST
>
> Array 23 name = BODY_FORCES
>
> Number Of Components: 26
>
> Number Of Tuples: 31488
>
> Copy Tuple Flags: ( 1 1 1 1 1 0 1 )
>
> Interpolate Flags: ( 1 1 1 1 1 0 0 )
>
> Pass Through Flags: ( 1 1 1 1 1 1 1 )
>
> Scalars: (none)
>
> Vectors: (none)
>
> Normals: (none)
>
> TCoords: (none)
>
> Tensors: (none)
>
> GlobalIds: (none)
>
> PedigreeIds: (none)
>
> Point Data:
>
> Debug: Off
>
> Modified Time: 164208
>
> Reference Count: 1
>
> Registered Events: (none)
>
> Number Of Arrays: 0
>
> Number Of Components: 0
>
> Number Of Tuples: 0
>
> Copy Tuple Flags: ( 1 1 1 1 1 0 1 )
>
> Interpolate Flags: ( 1 1 1 1 1 0 0 )
>
> Pass Through Flags: ( 1 1 1 1 1 1 1 )
>
> Scalars: (none)
>
> Vectors: (none)
>
> Normals: (none)
>
> TCoords: (none)
>
> Tensors: (none)
>
> GlobalIds: (none)
>
> PedigreeIds: (none)
>
> Bounds:
>
> Xmin,Xmax: (-0.1, 0.3)
>
> Ymin,Ymax: (-0.100002, 2.60209e-18)
>
> Zmin,Zmax: (-0.100002, 2.60209e-18)
>
> Compute Time: 379083
>
> Number Of Points: 34943
>
> Point Coordinates: 0x4aa82b0
>
> Locator: 0
>
> Number Of Pieces: 1
>
> Piece: -1
>
> Ghost Level: 0
> Maybe it's because the point data fields, like the scalars and vectors you
> mentioned, are empty? I could probably fill in the gaps.
>
> Sohail
>
> --- On *Tue, 3/1/11, Berk Geveci <berk.geveci at kitware.com>* wrote:
>
>
> From: Berk Geveci <berk.geveci at kitware.com>
> Subject: Re: [Paraview] Using streamtracer/gradient filters on
> "multi-block" data set
> To: "Sohail Shafii" <sohailshafii at yahoo.com>
> Cc: paraview at paraview.org
> Date: Tuesday, March 1, 2011, 5:07 PM
>
>
> By any chance, does this multi-block dataset contain a block that does not
> have arrays (scalars and/or vectors)? That's probably why those filters are
> disabled. You can always use Extract Blocks to extract the block you are
> interested in and then apply the filter. As for the Programmable Filter, if
> you set the output type to vtkUnstructuredGrid, you should be able to do:
>
> self.GetOutput().ShallowCopy(self.GetInput().GetBlock(0))
>
> assuming that block 0 is a uns. grid.
>
> -berk
>
> On Tue, Mar 1, 2011 at 5:29 PM, Sohail Shafii <sohailshafii at yahoo.com<http://mc/compose?to=sohailshafii@yahoo.com>
> > wrote:
>
>
> Hi,
>
> I've read in a CAS file, which Paraview read in a Multi-block dataset,
> which contains within it a unstructured grid.
>
> Initially I had a problem where all of the data items were one-tuple
> arrays.  So I created a UVW (3-tuple velocity) array and added it to the
> pipeline this way using a Python programmable filter:
>
> input   = self.GetInput()
> output = self.GetOutput()
>
> output.ShallowCopy(input)
>
> ****create array here***
> output.GetBlock(0).GetCellData().AddArray(UVWArray)
>
> Note that "GetBlock(0)" gives me access to the grid object.  For some
> reason the gradients and streamtracer filters were greyed out and
> unavailable.  So I decided to make the output variable a vtkUnstructuredGrid
> instead and transferred the UVW array to it this way:
>
> output.GetPointData().AddArray(UVWArray)
>
> Nope...didn't work.  Any thoughts how I can modify the pipeline so that the
> streamtracer and gradients of unstructured data sets array can become
> usable? I'm guessing there is something in those classes which tells
> Paraview that they require certain input types. I've seen references to
> stuff like FillInputPortInformation.
>
> Thanks,
> Sohail
>
>
>
>
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