[vtkusers] vtkAppendFilter with double precision points (UNCLASSIFIED)

[Leiter, Kenneth (Cont, ARL/CISD)]

Classification:  UNCLASSIFIED 
Caveats: NONE
 

Hello all,

I am reading an exodus II file into vtk using the vtkExodusIIReader and am
converting the resulting vtkMultiBlockDataSet to a vtkUnstructuredGrid for
further processing.  I am using a vtkAppendFilter to get from the
vtkMultiBlockDataSet to a vtkUnstructuredGrid.

However, I am losing precision for the point values after running through
the vtkAppendFilter.  I have verified that the points are double precision
before entering the filter and single precision afterwards.  I am not
surprised that I lose precision as it looks like a new vtkPoints (default =
single precision) is allocated in the vtkAppendFilter class and there
appears to be no way to change this behavior.

Does anyone have a workaround or another way to accomplish what I need to
do?  It was difficult enough to get the vtkExodusIIReader to read in double
precision points without converting them to floats!

Thanks,
Ken

---------------------------------------------------------
Kenneth Leiter
Scientific Visualization Team
Lockheed Martin / ARL DoD Supercomputing Resource Center

 
Classification:  UNCLASSIFIED 
Caveats: NONE
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