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

[David Lawrence]

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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