Geant4 Cross Reference |
1 // -*- C++ -*- 1 2 // 3 // ------------------------------------------- 4 // HEP Random 5 // --- RandExponential 6 // class header file 7 // ------------------------------------------- 8 // This file is part of Geant4 (simulation too 9 // 10 // Class defining methods for shooting exponen 11 // values, given a mean (default mean = 1). 12 // Default mean is used for operator()(). 13 14 // =========================================== 15 // Gabriele Cosmo - Created: 5th September 199 16 // - Added methods to shoot arr 17 // J.Marraffino - Added default mean as attr 18 // operator() with mean: 16th 19 // M Fischler - put and get to/from strea 20 // =========================================== 21 22 #ifndef RandExponential_h 23 #define RandExponential_h 1 24 25 #include "CLHEP/Random/Random.h" 26 #include "CLHEP/Utility/memory.h" 27 28 namespace CLHEP { 29 30 /** 31 * @author <Gabriele.Cosmo@cern.ch> 32 * @ingroup random 33 */ 34 class RandExponential : public HepRandom { 35 36 public: 37 38 inline RandExponential ( HepRandomEngine& an 39 inline RandExponential ( HepRandomEngine* an 40 // These constructors should be used to inst 41 // distribution object defining a local engi 42 // The static generator will be skipped usin 43 // defined below. 44 // If the engine is passed by pointer the co 45 // will be deleted by the RandExponential de 46 // If the engine is passed by reference the 47 // will not be deleted by the RandExponentia 48 49 virtual ~RandExponential(); 50 // Destructor 51 52 // Static methods to shoot random values usi 53 54 static double shoot(); 55 56 static double shoot( double mean ); 57 58 static void shootArray ( const int size, do 59 double mean=1.0 ); 60 61 // Static methods to shoot random values us 62 // by-passing the static generator. 63 64 static inline double shoot( HepRandomEngine 65 66 static inline double shoot( HepRandomEngine 67 68 static void shootArray ( HepRandomEngine* a 69 double* vect, doub 70 71 // Methods using the localEngine to shoot r 72 // the static generator. 73 74 inline double fire(); 75 76 inline double fire( double mean ); 77 78 void fireArray ( const int size, double* vec 79 void fireArray ( const int size, double* vec 80 81 double operator()(); 82 double operator()( double mean ); 83 84 // Save and restore to/from streams 85 86 std::ostream & put ( std::ostream & os ) con 87 std::istream & get ( std::istream & is ); 88 89 std::string name() const; 90 HepRandomEngine & engine(); 91 92 static std::string distributionName() {retur 93 // Provides the name of this distribution cl 94 95 private: 96 97 std::shared_ptr<HepRandomEngine> localEngine 98 double defaultMean; 99 100 }; 101 102 } // namespace CLHEP 103 104 #include "CLHEP/Random/RandExponential.icc" 105 106 #endif 107