GB01BOptrChangeCrossSection.hh

Go to the documentation of this file.

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
// $Id: $
//---------------------------------------------------------------
//
// GB01BOptrChangeCrossSection
//
// Class Description:
//        A G4VBiasingOperator concrete implementation example to
//    illustrate how to bias physics processes cross-section for
//    one particle type.
//        The G4VBiasingOperation G4BOptnChangeCrossSection is
//    selected by this operator, and is sent to each process
//    calling the operator.
//        A simple constant bias to the cross-section is applied,
//    but more sophisticated changes can be applied.
//
//---------------------------------------------------------------
//

#ifndef GB01BOptrChangeCrossSection_hh
#define GB01BOptrChangeCrossSection_hh 1

#include "G4VBiasingOperator.hh"
class G4BOptnChangeCrossSection;
class G4ParticleDefinition;
class G4VProcess;
#include <map>


class GB01BOptrChangeCrossSection : public G4VBiasingOperator {
public:
  // ------------------------------------------------------------
  // -- Constructor: takes the name of the particle type to bias:
  // ------------------------------------------------------------
  GB01BOptrChangeCrossSection(G4String particleToBias, G4String name = "ChangeXS");
  virtual ~GB01BOptrChangeCrossSection();
  
  
private:
  // -----------------------------
  // -- Mandatory from base class:
  // -----------------------------
  // -- This method returns the biasing operation that will bias the physics process occurence.
  virtual G4VBiasingOperation*
  ProposeOccurenceBiasingOperation(const G4Track*                            track,
                                   const G4BiasingProcessInterface* callingProcess);
  // -- Methods not used:
  virtual G4VBiasingOperation*
  ProposeFinalStateBiasingOperation(const G4Track*, const G4BiasingProcessInterface*)
  {return 0;}
  virtual G4VBiasingOperation*
  ProposeNonPhysicsBiasingOperation(const G4Track*, const G4BiasingProcessInterface*)
  {return 0;}

private:
  // -- ("using" is avoid compiler complaining against (false) method shadowing.)
  using G4VBiasingOperator::OperationApplied;

  // -- Optionnal base class method implementation.
  // -- This method is called to inform the operator that a proposed operation has been applied.
  // -- In the present case, it means that a physical interaction occured (interaction at
  // -- PostStepDoIt level):
  virtual void OperationApplied( const G4BiasingProcessInterface*                callingProcess,
                                 G4BiasingAppliedCase                               biasingCase,
                                 G4VBiasingOperation*                 occurenceOperationApplied,
                                 G4double                         weightForOccurenceInteraction,
                                 G4VBiasingOperation*                finalStateOperationApplied, 
                                 const G4VParticleChange*                particleChangeProduced );
  
private:
  // -- List of associations between processes and biasing operations:
  std::map< const G4BiasingProcessInterface*, 
            G4BOptnChangeCrossSection*       > fChangeCrossSectionOperations;
  const G4VProcess *fFirstProcess, *fLastProcess;
  G4bool                                  fSetup;
  const G4ParticleDefinition*    fParticleToBias;

};

#endif