<div dir="ltr">Matt<div><br></div><div style>(You are presumably speaking of the grid structure stored in HDF5 output files, including in checkpoint files.) What do you intend to do with the grid structure you so obtain?</div>
<div style><br></div><div style>If you are interested in the exact grid structure, then yes, this is the correct way to do so. For example, when Carpet reads a grid structure e.g. for recovery, it uses this information.</div>
<div style><br></div><div style>However, if you e.g. want to visualise data, then there is an alternative. Each dataset (HDF5 component) contains attributes describing the coordinate of its upper left corner as well as the coordinate distance between grid points (grid spacing). This should suffice to correctly combine the datasets you read in, and may be much simpler than parsing the grid structure.</div>
<div style><br></div><div style>Note that the VisIt visualisation toolkit knows how to read Carpet output. You could look at its reader for details.</div><div style><br></div><div style>If you are really interested in parsing the grid structure, then it may be easier to discuss this in person. Are you available on Monday morning 11:00 EST for the Einstein Toolkit telecon? I can explain things there.</div>
<div style><br></div><div style>-erik</div><div style><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Feb 8, 2013 at 8:15 AM, Matthew Turk <span dir="ltr"><<a href="mailto:matthewturk@gmail.com" target="_blank">matthewturk@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<br>
<br>
I was wondering if someone could point me at how to parse the grid<br>
structure information in a Cactus output. I hope this is the right<br>
venue for this type of question.<br>
<br>
In the output I'm examining, under the "Parameters and Global<br>
Attributes" node at root level, there's a "Grid Structure v5" dataset,<br>
which contains "grid_superstructure" and "grid_structure". Is parsing<br>
the string affiliated with the grid_superstructure component the best<br>
way of identifying the spatial extent, dimensions and refinement level<br>
of grids in the output?<br>
<br>
Thanks very much for any pointers,<br>
<br>
Matt<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br>Erik Schnetter <<a href="mailto:schnetter@cct.lsu.edu" target="_blank">schnetter@cct.lsu.edu</a>><br><a href="http://www.perimeterinstitute.ca/personal/eschnetter/" target="_blank">http://www.perimeterinstitute.ca/personal/eschnetter/</a>
</div>