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  • Three levels of API?
    • Low level (equivalent to Geant4 geometry objects)
      • Initially dumb objects, sufficient to create Geant4 geometry
    • Medium level (similar to GEAR::Vertex::API)
    • High level (allows finding which detectors exist)
  • have collection of driver classes
    • one subdetector level
    • gcj comliant Java ( to be called from C++/Marlin)
    • read in 'free format' from parameters from xml elements
      • should probably be similar to compact/gear
  • low level implemetation:
    • create "queue" of geometry instructions
      • logical volumes
      • physical volumes
      • placements
      • material
      • etc
    • have converters that go through queue of instructions and create
      • G4Detector
      • HepRep
      • GDML / LCDD
  • medium and high level: GEAR++ interface(API)

points to cover

  • GEAR++ interface deifinition (medium and high level)
    • tracking (and clustering PFA)

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