DD4hep Developers Meeting

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Andre Sailer (CERN), Markus Frank (CERN)
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Please Join DD4hep developer's meeting via Zoom

DD4hep Developers Meeting
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68917133930
Host
Andre Sailer
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DD4hep Meeting October 16th, 2025

Present:     Andre, Markus

Apologies: Juan, Peter, Thomas


Link to minutes of previous meeting

Merged PRs

  • PR1499:  Add the pass-through of generator event information for EDM4hep (Thomas)

  • PR1500:  Add a [[maybe_unused]] to prevent a warning in ConditionExampleObjects.cpp (Juan)

  • PR1507:  Use CMAKE_INSTALL_LIBDIR (Juan)
  • PR1508:  Fix two compiler warnings about an unqualified move and an unused var (Juan)
  • PR1510:  Geant4VolumeManager: set message about bad paths that are insensitive… (Andre)
  • PR1512:  Add an option for increasing the number of nodes in GeoWebDisplay and a warning (Juan)

Closed PRs, closed issues and fixed problems

  • PR1511:  Layered calorimeter data update
  • PR1513:  Add the correct lib install dir to the plugin load path
  • ISSUE1502: genStatus, reason and status question
  • ISSUE1504: Link assignation of hits to status 2 particle
  • ISSUE1505: Add warning message when exceeding Maximum Number Of Nodes in geoWebDisplay? (closed by alexandertuna)
  • ISSUE1506: A lot of new output for TPC in k4geo

  • ISSUE1509: Overriding magnetic field definition specified in example in steering file (closed by Andre)

Pending Problems

  • ISSUE1297:  Possible to dump all available readout elements?
                          ==> Possibly a copy of unsolved ISSUE580 from Valentin about enumerating all sensitive cells.
  • ISSUE1320:  Replacing a Handle<Segmentation> which contains a MultiSegmentation with the underlying Segmentation
                          ==> Unclear what he really means.
  • ISSUE1335:   Uniform random picking of points on detector surfaces for noise studies
                           This problem is linked to #1297 and #580.
  • PR1240:        Add multithreading support to ddsim
  • PR1314:        Cylinder segment surface (Armin Ilg)
  • ISSUE1373:  Add GeneratorInfo to EDM4hepReader (Andre)
  • ISSUE1443:  Make user particle handler extensible
                           ---> Maybe we should take advantage and re-collect requirements.
  • ISSUE1458: XML file vs TGeoStored geometry in GenFit
  • ISSUE1487: The test t_DDDigi_sim_test_weighted_deposit_overlay can fail (Juan)
      ---> Unstable test 
  • ISSUE1489:  using SkinSurfacequestion
  • ISSUE1492:  Readout segmentation for multiple cylinders with offset axes question
                          ----> Unclear code in CylindricalGridPhiZ.cpp line 80
                          ----> Try special case where axis is identical to beam axis.
  • ISSUE1501: Bug/Feature: Condense duplicated particle contributions in calorimeter question

    New:


  • Pending:

  • PR1498:  Modernize code related to Surfaces and the SurfaceManager (Juan)
  • PR1503:  [WIP] Add flag for fast simulation to MCParticle

Round Table

Andre:     New tag coming up soon. With new version of podio and edm4hep.
Markus:  NTR.

AOB

Next meeting:   October 30th, 2025

There are minutes attached to this event. Show them.