G4INCLRandom.hh

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00025 //
00026 // INCL++ intra-nuclear cascade model
00027 // Pekka Kaitaniemi, CEA and Helsinki Institute of Physics
00028 // Davide Mancusi, CEA
00029 // Alain Boudard, CEA
00030 // Sylvie Leray, CEA
00031 // Joseph Cugnon, University of Liege
00032 //
00033 #define INCLXX_IN_GEANT4_MODE 1
00034 
00035 #include "globals.hh"
00036 
00037 /*
00038  * G4INCLRandom.hh
00039  *
00040  *  \date 7 June 2009
00041  * \author Pekka Kaitaniemi
00042  */
00043 
00044 #ifndef G4INCLRANDOM_HH_
00045 #define G4INCLRANDOM_HH_
00046 
00047 #include <iostream>
00048 #include <cmath>
00049 #include "G4INCLIRandomGenerator.hh"
00050 #include "G4INCLThreeVector.hh"
00051 #include "G4INCLGlobals.hh"
00052 #include "G4INCLLogger.hh"
00053 
00054 namespace G4INCL {
00055 
00056   class Random {
00057   private:
00058     Random() {}
00059     virtual ~Random() {}
00060 
00061   private:
00062     static IRandomGenerator *theGenerator;
00063 
00064   public:
00070     static void setGenerator(G4INCL::IRandomGenerator *aGenerator) {
00071       if(isInitialized()) {
00072         ERROR("INCL random number generator already initialized." << std::endl);
00073       } else {
00074         theGenerator = aGenerator;
00075       }
00076     };
00077 
00082     static void setSeeds(const SeedVector &sv) {
00083       theGenerator->setSeeds(sv);
00084     };
00085 
00090     static SeedVector getSeeds() {
00091       return theGenerator->getSeeds();
00092     };
00093 
00097     static G4double shoot() {return theGenerator->flat(); };
00098 
00102     static G4double shoot0() {
00103       G4double r;
00104       while( (r=shoot()) <= 0. )
00105         ;
00106       return r;
00107     }
00108 
00112     static G4double shoot1() {
00113       G4double r;
00114       while( (r=shoot()) >= 1. )
00115         ;
00116       return r;
00117     }
00118 
00122     static G4double gauss(G4double sigma=1.);
00123 
00127     static ThreeVector normVector(G4double norm=1.);
00128 
00133     static ThreeVector sphereVector(G4double rmax=1.) {
00134       return normVector( rmax*Math::pow13(shoot0()) );
00135     }
00136 
00142     static ThreeVector gaussVector(G4double sigma=1.) {
00143       const G4double sigmax = sigma * Math::oneOverSqrtThree;
00144       return ThreeVector(gauss(sigmax), gauss(sigmax), gauss(sigmax));
00145     }
00146 
00150     static void deleteGenerator() {
00151       delete theGenerator;
00152       theGenerator = 0;
00153     }
00154 
00158     static G4bool isInitialized() {
00159       if(theGenerator == 0) return false;
00160       return true;
00161     };
00162   };
00163 
00164 }
00165 
00166 #endif /* G4INCLRANDOM_HH_ */

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