G4Tubs Center Of mass

Geometry, Fields and Transportation
1

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_Geant4 Version:_V11.2.1
_Operating System:_Linux Fedora 40
_Compiler/Version:_gcc 14.2.1
_CMake Version:_3.28.2

In geant4-v11.2.1 G4Tubs GetCenterOfMass() always gives G4ThreeVector(0, 0, 0). This is clearly only true for DeltaPhi = 360 deg. That is not the case for DeltaPhi != 360. Other solids (such as G4Sphere) give the correct center fo mass. Was this corrected in v11.2.2, or is it still missing?

2

Where is this function defined? I couldn’t find GetCenterOfMass() in the Geant4 sources.

3

Oh dear! My mistake! I had actually started implementing a GetCenterOfMass function for G4VSolid several months ago and implemented it for several solids , but not all of them and forgot that I did that! I generated my own DOxygen documentation for my sources and it showed G4VSolid having GetCenterOfMass and forgot completely that I inserted that.

Thanks for checking!