KKMCRandom.cxx

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//--------------------------------------------------------------------------
//
// Environment:
//      This software is part of the EvtGen package developed jointly
//      for the BaBar and CLEO collaborations.  If you use all or part
//      of it, please give an appropriate acknowledgement.
//
// Copyright Information: See EvtGen/COPYRIGHT
//      Copyright (C) 1998      Caltech, UCSB
//
// Module: EvtRandom.cc
//
// Description: routines to get random numbers from 
//              random number generator.
//
// Modification history:
//
//    DJL/RYD   September 25, 1996           Module created
//
//------------------------------------------------------------------------
//
 
#include "KKMC/KKMCRandom.h"
 
#include "CLHEP/Random/RanluxEngine.h"
#include <iostream>
using namespace std;
using namespace CLHEP;
 
HepRandomEngine* KKMCRandom::_randomEngine=0;
 
void KKMCRandom::setRandomEngine(CLHEP::HepRandomEngine* randomEngine){
  _randomEngine=randomEngine;
}
 
 
double KKMCRandom::random(){
 
  if (_randomEngine==0){
    cerr <<"No random engine available in "
               <<"KKMCRandom::random()."<<endl;
  }
 
    return _randomEngine->flat();
  }
 
 
 
double KKMCRandom::Flat( double min, double max){
 
  if ( min > max ) {
    cerr<< "min>max in KKMCRandom::Flat(" << min << "," << max << ")" <<endl;
  }
 
  return KKMCRandom::random()*( max - min )+min;
 
} 
 
double KKMCRandom::Flat(double max){
 
  return max*KKMCRandom::random();
 
} 
 
double KKMCRandom::Flat(){
 
  return KKMCRandom::random();
 
 } 
 
void KKMCRandom::FlatArray(double* vect, const int size){
  if(_randomEngine == 0) cout<<"Can not get randomEngine pointer in KKMCRandom::FlatArray"<<endl;
  else _randomEngine->flatArray(size,vect);
}