/usr/include/CLHEP/Random/RandPoissonT.h is in libclhep-dev 2.1.4.1+dfsg-1.
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// -*- C++ -*-
//
// -----------------------------------------------------------------------
// HEP Random
// --- RandPoissonT ---
// class header file
// -----------------------------------------------------------------------
// Class defining methods for shooting numbers according to the Poisson
// distribution, given a mean. RandPoissonT is derived from RandPoisson
// and shares the identical user interface. RandPoissonT is always
// perfectly accurate for any value of mu.
// For mu > 100 the algorithm used is taken from the base class RandPoisson
// (Algorithm from "W.H.Press et al., Numerical Recipes in C, Second Edition".)
//
// For mu < 100, algorithm used is a table lookup based on [mu/K] for some
// smallish K, followed by an explicit series-drived poisson for the small
// remaining part of mu. This method is exact, and is substantially faster
// than the method used by the base class. The implementation of this method
// is in the RandPoissonQ class.
// =======================================================================
// M. Fischler - Created 26 Jan 2000
// M Fischler - put and get to/from streams 12/10/04
// =======================================================================
#ifndef RandPoissonT_h
#define RandPoissonT_h 1
#include "CLHEP/Random/defs.h"
#include "CLHEP/Random/RandPoisson.h"
namespace CLHEP {
/**
* @author
* @ingroup random
*/
class RandPoissonT : public RandPoisson {
public:
RandPoissonT ( HepRandomEngine& anEngine, double m=1.0 );
RandPoissonT ( HepRandomEngine* anEngine, double m=1.0 );
// These constructors should be used to instantiate a RandPoissonT
// distribution object defining a local engine for it.
// The static generator will be skipped using the non-static methods
// defined below.
// If the engine is passed by pointer the corresponding engine object
// will be deleted by the RandPoissonT destructor.
// If the engine is passed by reference the corresponding engine object
// will not be deleted by the RandPoissonT destructor.
virtual ~RandPoissonT();
// Destructor
// Save and restore to/from streams
std::ostream & put ( std::ostream & os ) const;
std::istream & get ( std::istream & is );
// Static methods to shoot random values using the static generator
static long shoot( double m=1.0 );
static void shootArray ( const int size, long* vect, double m=1.0 );
// Static methods to shoot random values using a given engine
// by-passing the static generator.
static long shoot( HepRandomEngine* anEngine, double m=1.0 );
static void shootArray ( HepRandomEngine* anEngine,
const int size, long* vect, double m=1.0 );
// Methods using the localEngine to shoot random values, by-passing
// the static generator.
long fire();
long fire( double m );
void fireArray ( const int size, long* vect );
void fireArray ( const int size, long* vect, double m);
double operator()();
double operator()( double m );
std::string name() const;
HepRandomEngine & engine();
static std::string distributionName() {return "RandPoissonT";}
// Provides the name of this distribution class
private:
};
} // namespace CLHEP
#ifdef ENABLE_BACKWARDS_COMPATIBILITY
// backwards compatibility will be enabled ONLY in CLHEP 1.9
using namespace CLHEP;
#endif
#include "CLHEP/Random/RandPoissonT.icc"
#endif
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