BDSNavigatorPlacements.hh

/* 
Beam Delivery Simulation (BDSIM) Copyright (C) Royal Holloway, 
University of London 2001 - 2023.
 
This file is part of BDSIM.
 
BDSIM is free software: you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published 
by the Free Software Foundation version 3 of the License.
 
BDSIM is distributed in the hope that it will be useful, but 
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with BDSIM.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef BDSNAVIGATORPLACEMENTS_H
#define BDSNAVIGATORPLACEMENTS_H
 
#include "G4AffineTransform.hh"
#include "G4Navigator.hh"
#include "G4ThreeVector.hh"
#include "G4Types.hh"
 
#include <utility>
 
class G4VPhysicalVolume;
 
class BDSNavigatorPlacements
{
public:
  BDSNavigatorPlacements();
  ~BDSNavigatorPlacements();
 
  static void AttachWorldVolumeToNavigator(G4VPhysicalVolume* worldPVIn)
  {navigator->SetWorldVolume(worldPVIn); worldPV = worldPVIn;}
 
  static void ResetNavigatorStates();
  
  G4ThreeVector ConvertToLocal(const G4ThreeVector& globalPosition,
                               G4bool& foundAPlacementVolume) const;
 
  G4ThreeVector ConvertToLocalNoSetup(const G4ThreeVector& globalPosition) const;
 
  G4ThreeVector ConvertAxisToGlobal(const G4ThreeVector& localAxis) const;
  
  std::pair<G4ThreeVector, G4ThreeVector> ConvertAxisToGlobal(const std::pair<G4ThreeVector, G4ThreeVector>& localAxis) const;
 
protected:
  mutable G4AffineTransform globalToLocal;
  mutable G4AffineTransform localToGlobal;
  
  static G4Navigator* navigator;
 
private:
  inline const G4AffineTransform& GlobalToLocal() const {return globalToLocal;}
  inline const G4AffineTransform& LocalToGlobal() const {return localToGlobal;}
  
  G4bool InitialiseTransform(const G4ThreeVector& globalPosition) const;
  
  static G4int numberOfInstances;
  
  static G4VPhysicalVolume* worldPV;
};
 
 
#endif