[vtkusers] vtkPLYReader and endianness for Linux (Intel)

[Pieper, Chris]

Vtk list:

I am trying to work with the new vtkPLYReader.  I will admit immediately
that I barely know what I'm talking about regarding endianness, so forgive
any misuse of terminology, I hope I can convey my point...

I have some binary PLY files that were created on a machine of (apparently)
opposite endianness from that of the Intel processor I'm running Linux (RH
7.1) on.  I believe I have found through a lot of trial and error that I
need to check the endianness of my machine to determine whether or not byte
swapping is necessary.  Even though the endianness is included in the header
of the PLY file, I think the additional check (to check the hardware reading
the file) is still required.

The symptom that I see when I read and immediately write out a PLY file is
that the vertex coordinates are bogus (like 1.0 e-47 for example) -- this is
the same symptom that led me to play with byteswapping in the past (before
the vtkPLYReader).

Has anyone else experienced this?  I would appreciate any help you could
offer.

Thanks,

Chris Pieper

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