Gabriele Cosmo
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
// -*- C++ -*-
|
|
//
|
|
// -----------------------------------------------------------------------
|
|
// HEP Random
|
|
// --- RandExponential ---
|
|
// inlined functions implementation file
|
|
// -----------------------------------------------------------------------
|
|
// This file is part of Geant4 (simulation toolkit for HEP).
|
|
|
|
// =======================================================================
|
|
// Gabriele Cosmo - Created: 19th August 1998
|
|
// =======================================================================
|
|
|
|
#include <cmath> // for log()
|
|
|
|
namespace CLHEP {
|
|
|
|
inline RandExponential::RandExponential(HepRandomEngine & anEngine,
|
|
double mean )
|
|
: HepRandom(), localEngine(&anEngine, do_nothing_deleter()), defaultMean(mean) {}
|
|
|
|
inline RandExponential::RandExponential(HepRandomEngine * anEngine,
|
|
double mean )
|
|
: HepRandom(), localEngine(anEngine), defaultMean(mean) {}
|
|
|
|
//-------------
|
|
|
|
inline double RandExponential::shoot(HepRandomEngine* anEngine) {
|
|
return -std::log(anEngine->flat());
|
|
}
|
|
|
|
inline double RandExponential::shoot(HepRandomEngine* anEngine,
|
|
double mean) {
|
|
return -std::log(anEngine->flat())*mean;
|
|
}
|
|
|
|
//-------------
|
|
|
|
inline double RandExponential::fire() {
|
|
return -std::log(localEngine->flat())*defaultMean;
|
|
}
|
|
|
|
inline double RandExponential::fire(double mean) {
|
|
return -std::log(localEngine->flat())*mean;
|
|
}
|
|
|
|
} // namespace CLHEP
|