G4INCLRandom.hh

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//
// INCL++ intra-nuclear cascade model
// Pekka Kaitaniemi, CEA and Helsinki Institute of Physics
// Davide Mancusi, CEA
// Alain Boudard, CEA
// Sylvie Leray, CEA
// Joseph Cugnon, University of Liege
//
#define INCLXX_IN_GEANT4_MODE 1

#include "globals.hh"

/*
 * G4INCLRandom.hh
 *
 *  \date 7 June 2009
 * \author Pekka Kaitaniemi
 */

#ifndef G4INCLRANDOM_HH_
#define G4INCLRANDOM_HH_

#include <iostream>
#include <cmath>
#include <utility>
#include "G4INCLIRandomGenerator.hh"
#include "G4INCLThreeVector.hh"
#include "G4INCLGlobals.hh"
#include "G4INCLLogger.hh"

namespace G4INCL {

  namespace Random {
    /**
     * Set the random number generator implementation to be used globally by INCL.
     *
     * @see G4INCL::IRandomGenerator
     */
    void setGenerator(G4INCL::IRandomGenerator *aGenerator);

    /**
     * Set the seeds of the current generator.
     *
     */
    void setSeeds(const SeedVector &sv);

    /**
     * Get the seeds of the current generator.
     *
     */
    SeedVector getSeeds();

    /**
     * Generate flat distribution of random numbers.
     */
    G4double shoot();

    /**
     * Return a random number in the ]0,1] interval
     */
    G4double shoot0();

    /**
     * Return a random number in the [0,1[ interval
     */
    G4double shoot1();

    /**
     * Return a random integer in the [0,n[ interval
     */
    template<typename T> T shootInteger(T n);

    /**
     * Generate random numbers using gaussian distribution.
     */
    G4double gauss(G4double sigma=1.);

    /**
     * Generate isotropically-distributed ThreeVectors of given norm.
     */
    ThreeVector normVector(G4double norm=1.);

    /**
     * Generate ThreeVectors that are uniformly distributed in a sphere of
     * radius rmax.
     */
    ThreeVector sphereVector(G4double rmax=1.);

    /** \brief Generate Gaussianly-distributed ThreeVectors
     *
     * Generate ThreeVectors that are distributed as a three-dimensional
     * Gaussian of the given sigma.
     */
    ThreeVector gaussVector(G4double sigma=1.);

    /// \brief Generate pairs of correlated Gaussian random numbers
    std::pair<G4double,G4double> correlatedGaussian(const G4double corrCoeff, const G4double x0=0., const G4double sigma=1.);

    /// \brief Generate pairs of correlated uniform random numbers
    std::pair<G4double,G4double> correlatedUniform(const G4double corrCoeff);

    /**
     * Delete the generator
     */
    void deleteGenerator();

    /**
     * Check if the generator is initialized.
     */
    G4bool isInitialized();

  }

}

#endif /* G4INCLRANDOM_HH_ */