In This Package:

GtGunGenTool.h

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#ifndef GTGUNGENTOOL_H
#define GTGUNGENTOOL_H


#include "GenTools/IHepMCEventMutator.h"
#include "GaudiAlg/GaudiTool.h"
#include "GaudiKernel/RndmGenerators.h"

class IDetectorElement;

class GtGunGenTool : public GaudiTool,
                     virtual public IHepMCEventMutator
{

public:

    GtGunGenTool(const std::string& type,
                 const std::string& name,
                 const IInterface* parent);
    virtual ~GtGunGenTool();

    // GaudiTool interface
    virtual StatusCode initialize();
    virtual StatusCode finalize();

    // HepMCEventMutator interface
    virtual StatusCode mutate(HepMC::GenEvent& event);

private:

    std::string m_particleName;

    int m_particlesPerEvent;


    // What does 'momentum' value mean? Interpretation
    std::string m_momentumInterpretation;

    std::string m_momentumMode;

    //   double m_momentum;
    DoubleProperty m_momentum;

    double m_momentumSpread;

    std::string m_directionMode;

    std::vector<double> m_direction;

    double m_directionSpread;

    std::string m_polarizeMode;

    Rndm::Numbers m_uni, m_gauss;
    int m_pid;
    double m_mass;
    double generateNumber(const std::string& mode, double mean, double spread);
    StatusCode oneVertex(HepMC::GenEvent& event);
};

#endif  // GTGUNGENTOOL_H

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