BDSROOTSamplerReader.hh

/* 
Beam Delivery Simulation (BDSIM) Copyright (C) Royal Holloway, 
University of London 2001 - 2022.
 
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 BDSROOTSAMPLERREADER_H
#define BDSROOTSAMPLERREADER_H
 
#include "globals.hh"
#include "G4RotationMatrix.hh"
#include "G4ThreeVector.hh"
#include "G4VPrimaryGenerator.hh"
 
#include <vector>
 
class BDSBunchEventGenerator;
class BDSOutputLoaderSampler;
class G4Event;
class G4PrimaryParticle;
class G4PrimaryVertex;
class G4VSolid;
 
class BDSROOTSamplerReader: public G4VPrimaryGenerator
{
public:
  BDSROOTSamplerReader() = delete;
  BDSROOTSamplerReader(const G4String& distrType,
                       const G4String& fileNameIn,
                       BDSBunchEventGenerator* bunchIn,
                       G4bool removeUnstableWithoutDecayIn = true,
                       G4bool warnAboutSkippedParticlesIn = true);
  virtual ~BDSROOTSamplerReader();
 
  virtual void GeneratePrimaryVertex(G4Event* anEvent);
 
  virtual void RecreateAdvanceToEvent(G4int eventOffset);
 
  struct DisplacedVertex
  {
    G4ThreeVector xyz;
    G4PrimaryParticle* vertex;
  };
  
protected:
  void ReadSingleEvent(G4long index);
 
  //void HepMC2G4(const HepMC3::GenEvent* hepmcevt, G4Event* g4event);
  
  // We  have to take care for the position of primaries because
  // primary vertices outside the world volume would give rise to a G4Exception.
  virtual G4bool VertexInsideWorld(const G4ThreeVector& pos) const;
  
  void ReadPrimaryParticlesFloat(G4long index);
  void ReadPrimaryParticlesDouble(G4long index);
 
private:
  G4long                    currentFileEventIndex;
  G4long                    nEventsInFile;
  BDSOutputLoaderSampler*   reader;
  G4String                  fileName;
  G4String                  samplerName;
  BDSBunchEventGenerator*   bunch;
  G4bool                    removeUnstableWithoutDecay;
  G4bool                    warnAboutSkippedParticles;
  G4RotationMatrix          referenceBeamMomentumOffset;
  mutable G4VSolid*         worldSolid;
  
  G4bool anyParticlesFoundAtAll;
  
  std::vector<DisplacedVertex> vertices;
  
  std::vector<G4PrimaryVertex*> currentVertices;
};
 
#endif