GlueX Offline Meeting, March 9, 2010
Minutes

   JLab: Craig Bookwalter, Eugene Chudakov, Mark Ito (chair), David
   Lawrence, Sascha Somov, Eliott Wolin, Beni Zihlmann

Reviewing minutes from last meeting

   We skimmed ???last week's minutes:
     * Truth and Hits: David implemented our new policy to allow
       simultaneous existence in the data model of truth information and
       smeared hit information. This required the introduction of new
       structures for truth information for the CDC wires, FDC cathodes,
       and FDC anodes. Mcsmear reads in the truth information into the new
       structure and outputs smeared values in the (pre-existing)
       corresponding ones.
     * Noise Hits in mcsmear: David changed the default behaviour to have
       no noise generation. The -N switch was introduced to turn on noise
       generation. The -n switch implements the default behaviour, for
       backward compatibility.


MacOS build work

   David brought us up-to-date. He has been working on building the GlueX
   software on a recently acquired Mac-Mini running MacOS 10.6. Has been
   having problems with CERNLIB and with ROOT, both will compile, but
   programs using them crash. We all agreed that this should not be taking
   a huge amount of David's time; it will now be a background project for
   him.

Building a roof over src

   Mark presented a proposal to make change in the top-level structure of
   our simulation and reconstruction code, in essence give it name
   ("sim-recon") less generic than the current one ("src"). See
   his ???wiki page for details.

   There was general agreement on the idea and the name sim-recon was
   endorsed. Details to follow in the coming days.

ded, a new GlueX event display

   Elliott gave a report on ded<code>, a new event display program written
   by Dave Heddle. A complete presentation will be given at the next
   Online Meeting but some features are:
     * works under Dave's bcnu framework
     * total code base roughly 40,000 lines of code
     * 2,700 lines of coded needed to implement the
       GlueX-detector-specific geometry and event format
     * 100% Pure Java
     * CLAS12 implementation called <code>ced


Improvements in full event reconstruction

   David presented recent changes in reconstruction and the current event
   display (hdview2) mainly having to do with calorimeter clusters and the
   resulting photon objects. See ???his slides for details. He has
   implemented an algorithm that combines adjacent clusters into photons.
   He has also added features to be able to display the photons as well as
   the projected intersection of charged tracks with the calorimeters.

Time for a new build?

   Mark asked the question. David answered it (yes) in light of the
   changes in the previous discussion.

Generating FADC data

   Beni is thinking about how we might want to generate raw FADC data
   (digital scope traces) in the smearing step of Monte Carlo generation.
   He is collecting ideas.

Offline Software and the 12 GeV Project Plan

   See the [37]Offline Software and the 12 GeV Project Plan wiki page.

New Action Items

    1. Make a new tagged release. -> Mark
    2. PWA scope study -> Craig

   Retrieved from
   "http://www.jlab.org/Hall-D/software/wiki/index.php/GlueX_Offline_Meeting%2C_March_9%2C_2010"

References

  37. http://www.jlab.org/Hall-D/software/wiki/index.php/Private:Offline_Software_and_the_12_GeV_Project_Plan