G4SPSRandomGenerator.hh

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//
//
// MODULE:        G4SPSRandomGenerator.hh
//
// Version:      1.0
// Date:         5/02/04
// Author:       Fan Lei 
// Organisation: QinetiQ ltd.
// Customer:     ESA/ESTEC
//
//
// CHANGE HISTORY
// --------------
//
// 26/10/2004 F Lei
//    Created separated the theta, phi generators for position distributions.
//
// Version 1.0, 05/02/2004, Fan Lei, Created.
//    Based on the G4GeneralParticleSource class in Geant4 v6.0
//
//
// Class Description:
//
// Special random number generator used by G4GeneralParticleSource to allow 
// biasing applied at the lowest level for all distributions.
//
//
// MEMBER FUNCTIONS
// ----------------
//
// G4SPSRandomGenerator ()
//    Constructor: Initializes variables
//
// ~G4SPSRandomGenerator ()
//    Destructor: 
//
// void SetXBias(G4ThreeVector)
//    Allows the user to re-distribute the random
//    numbers used to generate x co-ordinates.
//
// void SetYBias(G4ThreeVector)
//    Allows the user to re-distribute the random
//    numbers used to generate y co-ordinates.
//
// void SetZBias(G4ThreeVector)
//    Allows the user to re-distribute the random
//    numbers used to generate z co-ordinates.
//
// void SetThetaBias(G4ThreeVector)
//    Allows the user to re-distribute the random
//    numbers used to generate values of theta.
//
// void SetPhiBias(G4ThreeVector)
//    Allows the user to re-distribute the random
//    numbers used to generate values of phi.
//
// void SetPosThetaBias(G4ThreeVector)
//    Allows the user to re-distribute the random
//    numbers used to generate values of theta for position distribution.
//
// void SetPosPhiBias(G4ThreeVector)
//    Allows the user to re-distribute the random
//    numbers used to generate values of phi for position distribution.
//
// void SetEnergyBias(G4ThreeVector)
//    Allows the user to re-distribute the random
//    numbers used to generate the energies.
//
// G4double GenRandX()
//    Generates the random number for x, with or without biasing.
//
// G4double GenRandY()
//    Generates the random number for y, with or without biasing.
//
// G4double GenRandZ()
//    Generates the random number for z, with or without biasing.
//
// G4double GenRandTheta()
//    Generates the random number for theta, with or without biasing.
//
// G4double GenRandPhi()
//    Generates the random number for phi, with or without biasing.
//
// G4double GenRandEnergy()
//    Generates the random number for energy, with or without biasing.
//
// G4double GenRandPosTheta()
//    Generates the random number for theta, with or without biasing for position distribution.
//
// G4double GenRandPosPhi()
//    Generates the random number for phi, with or without biasing for position distribution.
//
//  inline G4double GetBiasWeight()
//    Returns the weight change after biasing
// 
//  void ReSetHist(G4String);
//    Re-sets the histogram for user defined distribution
//
// void SetVerbosity(G4int)
//    Sets the verbosity level.
//
//
#ifndef G4SPSRandomGenerator_h
#define G4SPSRandomGenerator_h 1

#include "G4PhysicsOrderedFreeVector.hh"
#include "G4DataInterpolation.hh"

class G4SPSRandomGenerator {
public:
    G4SPSRandomGenerator();
    ~G4SPSRandomGenerator();

    //  static G4SPSRandomGenerator* getInstance ();

    // Biasing Methods
    void SetXBias(G4ThreeVector);
    void SetYBias(G4ThreeVector);
    void SetZBias(G4ThreeVector);
    void SetThetaBias(G4ThreeVector);
    void SetPhiBias(G4ThreeVector);
    void SetEnergyBias(G4ThreeVector);
    void SetPosThetaBias(G4ThreeVector);
    void SetPosPhiBias(G4ThreeVector);
    G4double GenRandX();
    G4double GenRandY();
    G4double GenRandZ();
    G4double GenRandTheta();
    G4double GenRandPhi();
    G4double GenRandEnergy();
    G4double GenRandPosTheta();
    G4double GenRandPosPhi();

    inline void SetIntensityWeight(G4double weight) {
        bweights[8] = weight;
    }
    ;

    inline G4double GetBiasWeight() {
        return bweights[0] * bweights[1] * bweights[2] * bweights[3]
                * bweights[4] * bweights[5] * bweights[6] * bweights[7]
                * bweights[8];
    }
    ;

    // method to re-set the histograms
    void ReSetHist(G4String);

    // Set the verbosity level.
    void SetVerbosity(G4int a) {
        verbosityLevel = a;
    }
    ;

private:

    //  static G4SPSRandomGenerator  *instance;

    G4bool XBias, IPDFXBias;
    G4PhysicsOrderedFreeVector XBiasH;
    G4PhysicsOrderedFreeVector IPDFXBiasH;
    G4bool YBias, IPDFYBias;
    G4PhysicsOrderedFreeVector YBiasH;
    G4PhysicsOrderedFreeVector IPDFYBiasH;
    G4bool ZBias, IPDFZBias;
    G4PhysicsOrderedFreeVector ZBiasH;
    G4PhysicsOrderedFreeVector IPDFZBiasH;
    G4bool ThetaBias, IPDFThetaBias;
    G4PhysicsOrderedFreeVector ThetaBiasH;
    G4PhysicsOrderedFreeVector IPDFThetaBiasH;
    G4bool PhiBias, IPDFPhiBias;
    G4PhysicsOrderedFreeVector PhiBiasH;
    G4PhysicsOrderedFreeVector IPDFPhiBiasH;
    G4bool EnergyBias, IPDFEnergyBias;
    G4PhysicsOrderedFreeVector EnergyBiasH;
    G4PhysicsOrderedFreeVector IPDFEnergyBiasH;
    G4bool PosThetaBias, IPDFPosThetaBias;
    G4PhysicsOrderedFreeVector PosThetaBiasH;
    G4PhysicsOrderedFreeVector IPDFPosThetaBiasH;
    G4bool PosPhiBias, IPDFPosPhiBias;
    G4PhysicsOrderedFreeVector PosPhiBiasH;
    G4PhysicsOrderedFreeVector IPDFPosPhiBiasH;

    //G4double alpha;   // for biasing energy

    G4double bweights[9]; //record x,y,z,theta,phi,energy,posThet,posPhi,intensity weights

    // Verbosity
    G4int verbosityLevel;

    G4PhysicsOrderedFreeVector ZeroPhysVector; // for re-set only

};

#endif