Place the L3 coil turns explicitly instead of dividing the polyhedra - #15767
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Place the L3 coil turns explicitly instead of dividing the polyhedra#15767sawenzel wants to merge 1 commit into
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This fixes a problem in navigation with multithreaded native Geant4 and leaves the material unchanged. - The 168 coil turns were made with TGeoPgon::Divide. Geant4's G4ParameterisationPolyhedraZ rebuilds the shared master solid while navigating and allocates the new sides' thread-split data on worker threads, so a multithreaded run segfaults in the G4PolyhedraSide constructor. - L3CM is the only divided polyhedra in ALICE. The other 24 divisions are box divisions in HMPID, ZDC and FIT and are not affected. https://its.cern.ch/jira/browse/O2-7153 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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This fixes a problem in navigation with multithreaded native Geant4 and leaves the material unchanged.
https://its.cern.ch/jira/browse/O2-7153