[vtkusers] datareader/writer problem (writting multiple scalars using a vtkDataWriter)

[Jose Paulo Moitinho de Almeida]

On Tuesday 19 March 2002 13:02, Simon Faust wrote:
> Hi
> I'm trying to read a rectilineargrid vtk file in order to write it to
> binary format. Problems result from the fact that there are a few
> scalarfields in the original, but allways just one in the file writen by
> the writer. How could i handle the different scalarfields.
> When I write ascii files with my writer there is the same problem. here
> some code fragments:
>
> vtkRectilinearGridReader reader
>      reader SetFileName "multipleScalarsFields.vtk"
>
> vtkRectilinearGridWriter writer
>      writer SetInput [reader GetOutput]
>      writer SetFileName  "OutmultipleScalarsFields.vtk"
>      writer SetFileType 1
>      writer Write
>
> the scalar fields are named scalar0, scalar1 etc., many thanks for any
> hints

I managed to solve a similar problem by reopening  the output file and 
writing the other point scalars on my own. 

I looked at the info and tried to use the WriteHeader, WritePoints, 
WriteCells, etc, functions, but could not make my program (in python) work 
that way.

I think that another alternative may be to use FIELD data. The examples in 
Graphics/Testing/Tcl may help.... Understanding field data will certainly 
help.


Regards

Ze Paulo