[Halld-offline] Fwd: r10030 - in trunk/sim-recon/src/programs/Utilities: . hd_geom_query

Fri Nov 30 11:57:21 EST 2012

David,

My tool also accepts plain old 3-vectors that you type in at the command line.

-Richard J.

On 11/28/2012 11:05 PM, David Lawrence wrote:
>
> Hi Richard,
>
>   Yes, I'm aware of that functionality. I believe this command-line tool compliments that by providing something that can be used quickly when the 3-D coordinates of interest are already known. It is *much* simpler than figuring out how to plot the right cutaway and then click on the 3-D point of interest on a 2-D screen. While the resulting information may be the same, the path to it is different making this a useful addition to our toolbox.
>
> Regards,
> -David
>
> On 11/28/12 6:44 PM, Richard Jones wrote:
>> Hello,
>>
>> A tool for this already existed in hdgeant.  My tool allows you to click on a drawing of the detector that is cut through any arbitrary plane (origin, orientation selected with numbers or a mouse) and see the entire volume hierarchy plus the local value of the magnetic field.  Of course there is nothing wrong with having another tool that does the same thing.
>>
>> -Richard J.
>>
>>
>>
>>
>> On 11/28/2012 4:37 PM, David Lawrence wrote:
>>>
>>> Hi All,
>>>
>>>   As I mentioned at the Offline Software meeting today, I have written a new
>>> utility for examining the geometry. Specifically, if one gives it an X,Y,Z coordinate
>>> in the lab frame, it will print the volume and material properties for the
>>> volume at that point. It will also list the entire volume hierarchy of that volume
>>> outwards to the outermost Mother volume. Here is an example querying the center
>>> of the target.
>>>
>>> >hd_geom_query 0 0 65
>>>
>>>    Location: (X, Y, Z) = (0, 0, 65)
>>> ===============================================
>>>      Volume: LIH2
>>>    material: LiqHydrogen
>>>     density: 0.0708 g/cm^3
>>> rad. length: 816.933 cm
>>>           A: 1.00797
>>>           Z: 1
>>>   ancestory: LIH2 -> TGTV -> TARG -> HALL -> SITE
>>>
>>> One can also have it generate the geometry from the XML at run-time
>>> using external HDDS tools similar to what was recently done with hdgeant.
>>>
>>> If the program is run with no arguments, a Usage statement is printed:
>>>
>>> >hd_geom_query
>>>
>>> Usage:
>>>     hd_geom_query [options] X Y Z
>>>
>>> Print the material properties for the specified point in lab
>>>  coordinates. Units of X,Y, and Z are cm.
>>>
>>> By default, this uses the geometry built into the file libHDGEOMETRY.a
>>> that was used to link this executable. The -xml switch may be used
>>> to dynamically compile and link code generated from the XML at run
>>> time. If an equals sign "=" follows the -xml switch then the
>>> main_HDDS.xml file is taken from the remainder of that argument.
>>>
>>> If the -xml switch is specified, then a file named "tmp_hddsroot.so"
>>> is searched for in the current directory. If found, it is opened and
>>> the geometry checksum is read from it and compared to that of the XML
>>> specified (which may be the default of $HDDS_HOME/main_HDDS.xml).
>>> If the two match, then that shared object is used, bypassing the
>>> (expensive) compilation phase. If the file is not present, is unreadable,
>>> or the checksums don't match, then the shared object is automatically
>>> (re)generated.
>>>
>>>  options:
>>>     -h or --help          Print this usage statement
>>>     -xml[=main_HDDS.xml]  Dynamically generate geometry
>>>     -checksum             Print the MD5 checksum of the
>>>                           geometry and exit
>>>
>>> If the -xml option is given and no file is specified,
>>> then a value of: $HDDS_HOME/main_HDDS.xml
>>> is used.
>>>
>>> The source for this is now in the sim-recon tree and can be found here:
>>>
>>> https://halldsvn.jlab.org/repos/trunk/sim-recon/src/programs/Utilities/hd_geom_query
>>>
>>>
>>> Regards,
>>> -David
>>>
>>>
>>> -------- Original Message --------
>>> Subject: 	r10030 - in trunk/sim-recon/src/programs/Utilities: . hd_geom_query
>>> Date: 	Wed, 28 Nov 2012 10:37:40 -0500
>>> From: 	Hall-D.SVN.Repository at jlab.org <mailto:Hall-D.SVN.Repository at jlab.org>
>>> To: 	davidl at jlab.org <mailto:davidl at jlab.org>, brash at pcs.cnu.edu <mailto:brash at pcs.cnu.edu>, wolin at jlab.org <mailto:wolin at jlab.org>, zisis at uregina.ca <mailto:zisis at uregina.ca>, mashephe at indiana.edu <mailto:mashephe at indiana.edu>, remitche at indiana.edu <mailto:remitche at indiana.edu>, zihlmann at jlab.org <mailto:zihlmann at jlab.org>, somov at jlab.org <mailto:somov at jlab.org>, staylor at jlab.org <mailto:staylor at jlab.org>, kmoriya at indiana.edu <mailto:kmoriya at indiana.edu>, pmatt at jlab.org <mailto:pmatt at jlab.org>, leckey at jlab.org <mailto:leckey at jlab.org>
>>>
>>>
>>>
>>> Author: davidl
>>> Date: 2012-11-28 10:37:40 -0500 (Wed, 28 Nov 2012)
>>> New Revision: 10030
>>>
>>> Added:
>>>     trunk/sim-recon/src/programs/Utilities/hd_geom_query/
>>>     trunk/sim-recon/src/programs/Utilities/hd_geom_query/Makefile
>>>     trunk/sim-recon/src/programs/Utilities/hd_geom_query/hd_geom_query.cc
>>> Log:
>>> A new utility to get info on the volume located at a
>>> specific location in lab coordinates. This uses the
>>> ROOT TGeo facility. The hddsroot.h file generated by
>>> HDDS is compiled in and used by default. An option
>>> exists to regenerate this file and compile and link
>>> it dynamically similar to what is now done in hdgeant.
>>>
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
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>>> Halld-offline at jlab.org  <mailto:Halld-offline at jlab.org>
>>> https://mailman.jlab.org/mailman/listinfo/halld-offline
>>
>>
>>
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