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This replaces the phi division of the space-frame mother BBMO by 18 explicit placements of the sector volume BBCE, so that the sector contents survive the conversion to Geant4. - Geant4 divides a polyhedra in phi by its number of sides and ignores the requested width and offset, and its cell frame sits at the start of a sector where TGeo's sits at the centre. - Both conversion routes, ROOT's GDML writer and VGM, are affected, so the 18 FTOS service boxes placed in BBCE were absent from the Geant4 geometry. - The TGeo geometry is unchanged: same node count, same BBCE shape and content, same global placements, no new overlaps. - With this, the ray-by-ray mass thickness of the two Geant4 geometries agrees with TGeo to 9e-8 relative, against 5e-5 before. https://its.cern.ch/jira/browse/O2-7153
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This replaces the phi division of the space-frame mother BBMO by 18 explicit placements of the sector volume BBCE, so that the sector contents survive the conversion to Geant4.
https://its.cern.ch/jira/browse/O2-7153