[Paraview] Block ordering

[Berend van Wachem]

Hi,

Thanks for ParaView - it seems impressive.

I have a question about writing data from a block structured code to the 
VTK-Paraview format.

I want to write multiple structured, boundary fitted blocks at a same 
time-level to a number of VTK files, and glue them with <Collection>. In 
the files for each block, I give the geometry data in the form of 
<Points> and the cell centered data in the form of <CellData>. This all 
works fine.

However, Paraview expects the numbering in the blocks always to be the 
same (I,J,K). So the I numbering matches with increase in X, J->Y, and 
K->Z. In the "VTK File Formats" manual it is stated as "Data with 
implicit topology are ordered with x increasing fastest, then y, then z".
In most block structured codes, this is however not the case. In one 
block the I direction can lie in another direction than in another 
block. This may not be so crucial when reading in the <Points>, but it 
is when reading in the <CellData>. It seems that Paraview maps the 
<CellData> to the (I,J,K) numbering instead of to the geometry given in 
<Points>.

Is there an easy way to overcome this in Paraview? So that the data 
given in <CellData> corresponds directly with the geometric data given 
in <Points>?

Thanks in advance!

Berend.