Re: [Jmol-users] HDF5 compression for Cube files?

[Robert Hanson]

Henry,

Good to hear from you!

Could be interesting. From my reading, HDF5 just uses standard ZLIB
compression  (ZIP, GZ) [
https://support.hdfgroup.org/HDF5/faq/compression.html]. I suppose there
might be some difference with that and its alternative SZIP, but I don't
find any comparisons for that with a quick search.

>From the blog comment, it looks to me he is talking specifically about
volume rendering, which is not what JVXL is for, and which Jmol is not set
up to do. JVXL is specifically for surface rendering, where it reduces a 3D
data problem to a 1D problem, thus the huge 300+:1 efficiencies relate to
cube files.

Bob




On Thu, Jun 8, 2017 at 12:28 AM, Rzepa, Henry S 
wrote:

> I have used the excellent  JVXL for reducing cube files to a selected
> isosurface.  Brian Skinner
>
> ( http://www.ch.imperial.ac.uk/rzepa/blog/?p=18365#comment-243964 ) has
> indicated work he is doing o the  HDF5 format for reducing cube files,
> where he can obtain up to 530 fold reduction in file sizes.
>
> Does anyone know if  HDF5 has been investigated for  JSmol support?
>
>
> Henry Rzepa, http://orcid.org/-0002-8635-8390
>
>
>
>
>
> 
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-- 
Robert M. Hanson
Professor of Chemistry
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr


If nature does not answer first what we want,
it is better to take what answer we get.

-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
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[Jmol-users] HDF5 compression for Cube files?

[Rzepa, Henry S]

I have used the excellent  JVXL for reducing cube files to a selected 
isosurface.  Brian Skinner 

( http://www.ch.imperial.ac.uk/rzepa/blog/?p=18365#comment-243964 
 ) has 
indicated work he is doing o the  HDF5 format for reducing cube files, where he 
can obtain up to 530 fold reduction in file sizes.

Does anyone know if  HDF5 has been investigated for  JSmol support?


Henry Rzepa, http://orcid.org/-0002-8635-8390






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