Geant4PlacementParameterisation.h

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//==========================================================================
//  AIDA Detector description implementation 
//--------------------------------------------------------------------------
// Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
// All rights reserved.
//
// For the licensing terms see $DD4hepINSTALL/LICENSE.
// For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
//
// Author     : M.Frank
//
//==========================================================================
#ifndef DDG4_GEANT4PLACEMENTPARAMETERISATION_H
#define DDG4_GEANT4PLACEMENTPARAMETERISATION_H
 
#include <DD4hep/Volumes.h>
 
#include <G4Transform3D.hh>
#include <G4PVParameterised.hh>
#include <G4VPVParameterisation.hh>
 
#include <vector>
 
namespace dd4hep {
 
  namespace sim {
 
 
    class Geant4PlacementParameterisation : public G4VPVParameterisation  {
    public:
 
      struct Dimension  {
    G4Transform3D delta        {   };
    G4ThreeVector translation  {   };
    std::size_t   count        { 0 };
 
      public:
    Dimension(const G4Transform3D& d, std::size_t c)
      : delta(d), translation(d.getTranslation()), count(c) {}
    Dimension() = default;
    Dimension(Dimension&&) = default;
    Dimension(const Dimension&) = default;
    Dimension& operator=(Dimension&&) = default;
    Dimension& operator=(const Dimension&) = default;
      };
 
      using Parameters   = PlacedVolume::Object::Parameterisation;
      using Rotations    = std::vector<G4RotationMatrix>;
      using Translations = std::vector<G4ThreeVector>;
      using Dimensions   = std::vector<Dimension>;
 
      PlacedVolume         m_placement;
      const Parameters&    m_params;
      Dimension            m_start          {  };
      Dimensions           m_dimensions     {  };
 
      EAxis                m_axis           { kUndefined };
      size_t               m_num_cells      { 0UL };
      bool                 m_have_rotation  { false };
 
      mutable Rotations    m_rotations;
      mutable Translations m_translations;
 
      void operator()(const G4Transform3D& transform);
 
    public:
      Geant4PlacementParameterisation(PlacedVolume pv);
      virtual ~Geant4PlacementParameterisation() = default;
      EAxis axis()  const     {   return m_axis;  }
      std::size_t count()  const;
      virtual void ComputeTransformation(const G4int copyNo, G4VPhysicalVolume* vol) const override;
    };
  }    // End namespace sim
}      // End namespace dd4hep
#endif // DDG4_GEANT4PLACEMENTPARAMETERISATION_H