BDSBunchGaussian.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 BDSBUNCHGAUSSIAN_H
#define BDSBUNCHGAUSSIAN_H 
 
#include "BDSBunch.hh"
 
#include "globals.hh"
#include "G4Transform3D.hh"
 
#include "CLHEP/Matrix/SymMatrix.h"
#include "CLHEP/Matrix/Vector.h"
 
#include <vector>
 
namespace CLHEP
{
  class HepRandomEngine;
  class RandMultiGauss;
}
 
namespace GMAD
{
  class Beam;
}
 
class BDSBunchGaussian: public BDSBunch
{
public:
  BDSBunchGaussian() = delete;
  explicit BDSBunchGaussian(const G4String& nameIn);
  virtual ~BDSBunchGaussian();
  
  virtual void SetOptions(const BDSParticleDefinition* beamParticle,
                          const GMAD::Beam& beam,
                          const BDSBunchType& distrType,
                          G4Transform3D beamlineTransformIn = G4Transform3D::Identity,
                          const G4double beamlineS = 0);
 
  virtual void BeginOfRunAction(G4int numberOfEvents,
                                G4bool batchMode);
 
  virtual BDSParticleCoordsFull GetNextParticleLocal();
  
protected:
  CLHEP::RandMultiGauss* CreateMultiGauss(CLHEP::HepRandomEngine& anEngine,
                                          const CLHEP::HepVector& mu,
                                          CLHEP::HepSymMatrix&    sigma);
  
  void PreGenerateEvents(G4int nGenerate);
 
  virtual BDSParticleCoordsFull GetNextParticleLocalCoords();
 
  CLHEP::HepVector    meansGM;
  CLHEP::HepSymMatrix sigmaGM;
 
  CLHEP::RandMultiGauss* gaussMultiGen;
  
  G4bool offsetSampleMean; 
 
  std::vector<G4double> x0_v, xp_v, y0_v, yp_v, z0_v, zp_v,E_v,t_v,weight_v;
  G4int iPartIteration; 
 
  std::vector<std::vector<G4double>* > coordinates;
};
 
#endif