DD4hep Developers Meeting

Thursday 5 Nov 2020, 15:30 → 17:00 Europe/Zurich

2/1-034 (CERN)

Marko Petric (CERN)

Please Join DD4hep developer's meeting via Vidyo

DD4hep meeting 22/10/2020
-------------------------

A.Sailer, C.Vuosalo, F.Gaede, I.Osborne, M.Frank, M.Petric, Voelkl

1)   Pending problems:
1.1) Problems reported by Sang Hyun Ko:
   - Cannot setup Birk's constant as material property.
   - No analogy to G4PVParametrized.
   - Significant CPU overhead using colors in DDG4.
     Need to turn off vis attributes during simulation.
   - Adding many daughters to a volume is very time consuming up to non-usability.
     Actually strcmp is getting significant.
1.2  Implementation of reflections
     No success
1.3  On Hold. Unit system: Do we want to use Geant4 units?
1.4  Documentation needed for MC truth handling
1.5  Possible improvements for checking compiler flags for different compilers (gcc,clang)

2)   Closed issues:
  -- Andre fixed crashing test using DDG4 as AClick.

3) Open issues:

4) Round table
   Andre:      Tests added in the LCG stack.
   Carl:       No news.
   Frank:      Building DD4hep head is difficult due to the selected python binding.
   Ianna:      Added CMS Calorimeter to examples. Needs to go to DDCMS.
   Marko:      Fixed some of the python binding issues reported by Frank.
               LCIO has problems with some linker flags on platform (MAC and GCC).
               Help for Beginners: Marko will contact Sarah if she could not host
               her beginners document on a CERN server, since she has an account.
   Markus:     Working on the reflections with limited success.
   Valentin:   Chattyness of Geant4Converter can be steered using the objects.
               Some plans to integrate EDM4hep with DD4hep. The idea is to do the
               same as with LCIO.

5) AOB
   None


Next meeting in 2 weeks: 19/11/2020