ArtG4DetectorConstruction.hh

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// ArtG4DetectorConstruction

// ArtG4DetectorConstruction serves as the user-created Detector
// Construction class in the Artized Art G4 simulation.
//
// In all GEANT simulations, a DetectorConstruction class (derived
// from G4VUserDetectorConstruction) must be created and passed to the
// run manager.  Then, when the run manager is initialized, it calls
// DetectorConstruction's Construct() method, which is responsible for
// constructing the geometry of the simulation and returning the world
// physical volume.  In this highly modular simulation framework,
// however, no one class knows about the whole geometry. Rather,
// individual detectors and geometry components register with the
// DetectorHolder service, which matches each component with its
// desired mother volume and eventually constructs the whole
// simulation geometry. All that Construct() needs to do, then, is
// retrieve the DetectorHolder's world physical volume and return it.
// Thus, this simple class will work for any simulation setup, and
// does not need to be modified for the addition or modification of
// each geometry component.
//
// It is worth noting that the world volume must exist at the time of the
// ArtG4DetectorConstruction object's construction.

// Author: Tasha Arvanitis, Adam Lyon

// Date: July 2012

#ifndef artg4tk_geantInit_ArtG4DetectorConstruction_hh
#define artg4tk_geantInit_ArtG4DetectorConstruction_hh

#include "Geant4/G4VUserDetectorConstruction.hh"
class G4VPhysicalVolume;

namespace artg4tk {

  class ArtG4DetectorConstruction : public G4VUserDetectorConstruction {
  public:
    explicit ArtG4DetectorConstruction(G4VPhysicalVolume* world);

  private:
    // Construct() is called by GEANT on its own and just returns the world
    G4VPhysicalVolume* Construct() override;

    G4VPhysicalVolume* world_;
  };

}

#endif /* artg4tk_geantInit_ArtG4DetectorConstruction_hh */