[Paraview] Reader for data file containing multiple kinds of data?

[Mike Jackson]

I can get some example code of a reader we are finishing up. We also  
store our data in HDF5 files. Some of the data is in a custom format,  
some is in a "vtkPolyData" ready state, and other is "2D Plot" type  
data.

Our Reader is a based on the vtkUnstructuredGridAlgorithm BUT we have  
5 output ports.
   Ports 0 and 1 are vtkUnstructuredGrid
   Port 2 is a vtkMultiBlockDataSet
   Ports 3,4,5 are vtkRectilinearGrid

We then created a new reader class for each of the types of data that  
is stored in the HDF5 files. In the top level reader, sub pipelines  
are setup to read each of the other types of data. At the end of all  
the reading the data is shallow copied back into the output objects  
for each port.

In ParaView, what we end up getting is a 3D plot of the  
UnstructuredGrids and 3 x 2D Plots of all the other data. It actually  
worked out pretty good.

Good Luck.
-- 
Mike Jackson   Senior Research Engineer
Innovative Management & Technology Services


On Jul 25, 2008, at 10:31 AM, John R. Cary wrote:

> I have just ordered the ParaView Guide, and the VTK
> Textbook and User's Guide, so answering by reference to
> those will be most welcome.
>
> My data files are hdf5 with a schema described by data
> attributes, so that I can pick out groups in the file
> and classify them as meshes (rectilinear, structured,
> unstructured, ...) or data, with the latter knowing what
> mesh they live on.  So the reader cannot derive from,
> e.g., vtkUnstructuredGridAlgorithm (like the example at
> http://www.paraview.org/Wiki/ParaView:Extend), as the
> data is not all on an unstructured grid.
>
> Furthermore, in the end, I suppose once I get this into
> ParaView, the result of opening a file will be the presence
> of several sources in the pipeline browser of ParaView.
>
> While I am waiting for the arrival of the above noted
> books, can someone point me to any starting point, such
> as class that does something similar to this?
>
> Thanks.....John Cary
>
> PS - we currently parse these files with pytables
> and then make 2D plots with matplotlib.
>
>
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