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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 April 2nd, 2026

Present:     Andre, Markus, Thomas

Apologies: Peter, Juan


Link to minutes of previous meeting

Merged PRs

  • PR1603:     Remove unused template function calling non existing function. (Arthur Hennequin)
                ===> Unused constructor of TwistedTube shape

  • PR1600:     Remove LCDD data conversion.  (Markus)
    ISSUE1597:  Remove LCDD data conversion.

  • PR1599:     Fix a few typos and remove unused includes (Juan)

  • PR1598:     fix: randomize non-zero polarization in optical photon gun (Wouter)

  • PR1592:     Geant4ParticleHandler: Keep particles back-scattered from calorimeter...  (Markus)
                ===> Updates only

  • PR1582:     Set the fast simulation flag and adjust step length for contributions created by fast simulation (Thomas)

     

Closed PRs, closed issues and fixed problems

  • ISSUE1514:  How to convert Geant4TrackID into MCParticle Parent ID (Aditya Agarwa)
                ===> Issue closed, update by Andre
  • ISSUE1594:  Test failures for tessellated volumes (Andre)
                ===> Support for quad-facets implemented by ROOT team.
  • ISSUE1601:  Allocated and deallocated size mismatch when destroying DetElementObject (Harry Liang)
                ===> Declined. Code on purpose

Pending Problems

  • ISSUE1297:  Possible to dump all available readout elements?
                          ==> Possibly a copy of unsolved ISSUE580 from Valentin about enumerating all sensitive cells.
  • ISSUE1335:   Uniform random picking of points on detector surfaces for noise studies
                           This problem is linked to #1297 and #580.
  • ISSUE1458: XML file vs TGeoStored geometry in GenFit
  • ISSUE1501: Bug/Feature: Condense duplicated particle contributions in calorimeter question
  • ISSUE1535: How to add new output variables in Hitsquestion (matclim -> DD4SHip)
                          ===> Debugging ongoing


     Pending PR:

  • PR1602:     feat: add Halton sequences support to isotrope generator (Wouter)

Round Table

Andre:            New top tag: v1r36
Markus:         NTR
Thomas:        NTR

AOB

Next meeting:   April 16th, 2026

There are minutes attached to this event. Show them.
    • 15:30 → 15:50
      Around the table 20m