[Paraview] Reading C-ordered data from hdf5

[Dominik Szczerba]

Depends what format you are talking about. Converting to legacy VTK, 
yes, this is inefficient in every regard. If you are knowledgable to 
program in hdf5 you may consider writing a plugin that will import your 
data without file conversions. However, you will probably have to 
convert rank-2 arrays anyway:

	// FIXME can it be done smarter
	for(int j=0; j<array->GetNumberOfTuples(); j++)
	{
		for(int i=0; i<array->GetNumberOfComponents(); i++)
		{
			array->SetComponent(j,i,data(j+1,i+1));
		}
	}

where data is a fortran style array. I wonder too if SetData would work 
here.

-- Dominik


John R. Cary wrote:
> I have arrays written out from C into HDF5 using the HDF5 C
> API, and so in the file the arrays are in C ordering.  I now
> need to read them into VTK.  AFAICT, VTK is Fortran ordering,
> even though it is written in C++.  So that means I need to
> reverse the ordering.  Of course, I can write a loop to do
> this, but is there some standard way that VTK folks do this?
> I don't want to reinvent the wheel.
> 
> Sorry for what is likely an elementary question, but I could
> not find it on the FAQ or after googling quite a bit.
> 
> Thanks so much......John Cary
> 
> 

-- 
Dominik Szczerba, Ph.D.
Foundation for Research
on Information Technologies in Society
http://www.itis.ethz.ch