Gabriele Cosmo
123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
// -*- C++ -*-
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//
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// -----------------------------------------------------------------------
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// HEP Random
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// --- RandGaussQ ---
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// class header file
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// -----------------------------------------------------------------------
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// Class defining methods RandGaussQ, which is derived from RandGauss.
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// The user interface is identical; but RandGaussQ is faster and a bit less
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// accurate.
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// =======================================================================
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// M. Fischler - Created: 24th Jan 2000
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// M Fischler - put and get to/from streams 12/10/04
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//
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// =======================================================================
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#ifndef RandGaussQ_h
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#define RandGaussQ_h 1
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#include "CLHEP/Random/RandGauss.h"
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namespace CLHEP {
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/**
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* @author
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* @ingroup random
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*/
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class RandGaussQ : public RandGauss {
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public:
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inline RandGaussQ ( HepRandomEngine& anEngine, double mean=0.0,
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double stdDev=1.0 );
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inline RandGaussQ ( HepRandomEngine* anEngine, double mean=0.0,
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double stdDev=1.0 );
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// These constructors should be used to instantiate a RandGaussQ
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// distribution object defining a local engine for it.
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// The static generator will be skipped using the non-static methods
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// defined below.
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// If the engine is passed by pointer the corresponding engine object
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// will be deleted by the RandGaussQ destructor.
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// If the engine is passed by reference the corresponding engine object
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// will not be deleted by the RandGaussQ destructor.
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// Destructor
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virtual ~RandGaussQ();
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//
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// Methods to generate Gaussian-distributed random deviates:
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//
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// If a fast good engine takes 1 usec, RandGauss::fire() adds 1 usec while
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// RandGaussQ::fire() adds only .4 usec.
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//
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// Static methods to shoot random values using the static generator
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static inline double shoot();
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static inline double shoot( double mean, double stdDev );
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static void shootArray ( const int size, double* vect,
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double mean=0.0, double stdDev=1.0 );
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// Static methods to shoot random values using a given engine
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// by-passing the static generator.
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static inline double shoot( HepRandomEngine* anotherEngine );
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static inline double shoot( HepRandomEngine* anotherEngine,
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double mean, double stdDev );
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static void shootArray ( HepRandomEngine* anotherEngine,
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const int size,
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double* vect, double mean=0.0,
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double stdDev=1.0 );
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// Instance methods using the localEngine to instead of the static
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// generator, and the default mean and stdDev established at construction
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inline double fire();
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inline double fire ( double mean, double stdDev );
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void fireArray ( const int size, double* vect);
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void fireArray ( const int size, double* vect,
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double mean, double stdDev );
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virtual double operator()();
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virtual double operator()( double mean, double stdDev );
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// Save and restore to/from streams
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std::ostream & put ( std::ostream & os ) const;
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std::istream & get ( std::istream & is );
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std::string name() const;
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HepRandomEngine & engine();
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static std::string distributionName() {return "RandGaussQ";}
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// Provides the name of this distribution class
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protected:
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static double transformQuick (double r);
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static double transformSmall (double r);
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private:
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// All the engine info, and the default mean and sigma, are in the RandGauss
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// base class.
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};
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} // namespace CLHEP
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#include "CLHEP/Random/RandGaussQ.icc"
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#endif
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