[FLASH-USERS] Question about direct manipulation of Flash HDF5 data

[Randy Hudson]

Cole,

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Re (2)
If you're not tied to IDL, you have a machine on which the executable of VisIt (http://www.llnl.gov/visit/executables.html) can 
run, and you want to visualize the temp you mention in (2), I'm pretty sure visit can resample the flash amr over a regular grid. 
  See the section on the "Resample" operator on p. 115 of the VisIt manual (http://www.llnl.gov/visit/1.5/VisItUsersManual1.5.pdf).

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Re (1)
P. 222 of the VisIt manual (with the help of the previous page or so) describes how to create a new lineout curve in the same 
window for every step of a time series, so you can see a cascade of curves for a time series.  You can pass the lineout sample 
line through the location you want to monitor over time.

Probably better:  p. 214 of the same manual states that any query that can be plotted over time contains a "Time Curve" button in 
the query's control panel.  The "Pick" query contains such a button, and is used to pick values, by location, frmo the data domain.



Cole Miller wrote:
> 
> Hi all,
> 
> I'd appreciate some help in terms of processing HDF5 output
> files from FLASH3.0 beta.  I've been able to run several of
> the test problems successfully and have used the xflash3 widget
> to produce images, do 1-d readout, et cetera.  So far, so good.
> However, for serious processing I need to be able to do a number
> of other things.  For example:
> 
> 1. At a given x,y,z point in the simulation region, what is the
>    time history of the pressure?
> 
> 2. What is the temperature over a uniform grid at a given time slice,
>    resampled from a nonuniform AMR grid?
> 
> Basically, I'd like more direct control over the data.
> 
> In principle I suppose that since an IDL widget can access this
> information, there should be a way to print it out directly from
> IDL.  However, I haven't used IDL before; any suggestions?  I have
> also tried to use the h5dump feature on individual files, but I
> have no experience with the output format (DDL or XML), and it
> looks like it would be a major endeavor to extract the required
> information from the ASCII output.  I've also tried, briefly, to
> look through some of the C routines on the HDF site that are supposed
> to be able to read HDF5 files, but have yet to surmount difficulties
> related to various libraries to which I need to link (maybe this can
> be solved by setting PATH variables in some way?).
> 
> Anyway, any help would be great!
> 
> Thanks,
> Cole
> 
> 

-- 

Randy.