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G4ParticleHPEnergyDistribution.hh
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27 // P. Arce, June-2014 Conversion neutron_hp to particle_hp
28 //
29 #ifndef G4ParticleHPEnergyDistribution_h
30 #define G4ParticleHPEnergyDistribution_h 1
31 
32 #include <fstream>
33 
34 #include "globals.hh"
35 #include "G4ios.hh"
36 #include "Randomize.hh"
43 #include "G4VParticleHPEDis.hh"
44 
45 // we will need a List of these .... one per term.
46 
48 {
49  public:
51  {
52  theEnergyDistribution = 0;
53  theNumberOfPartials = 0;
54  theRepresentationType = 0;
55  }
57  {
58  if(theEnergyDistribution != 0)
59  {
60  for(G4int i=0; i<theNumberOfPartials; i++)
61  {
62  delete theEnergyDistribution[i];
63  }
64  delete [] theEnergyDistribution;
65  }
66  }
67 
68  inline void Init(std::istream & theData)
69  {
70  G4double dummy;
71  theData >> dummy >> theNumberOfPartials;
72  theEnergyDistribution = new G4VParticleHPEDis * [theNumberOfPartials];
73  for(G4int i=0; i<theNumberOfPartials; i++)
74  {
75  theData >> theRepresentationType;
76  switch(theRepresentationType)
77  {
78  case 1:
79  theEnergyDistribution[i] = new G4ParticleHPArbitaryTab;
80  break;
81  case 5:
82  theEnergyDistribution[i] = new G4ParticleHPEvapSpectrum;
83  break;
84  case 7:
85  theEnergyDistribution[i] = new G4ParticleHPFissionSpectrum;
86  break;
87  case 9:
88  theEnergyDistribution[i] = new G4ParticleHPSimpleEvapSpectrum;
89  break;
90  case 11:
91  theEnergyDistribution[i] = new G4ParticleHPWattSpectrum;
92  break;
93  case 12:
94  theEnergyDistribution[i] = new G4ParticleHPMadlandNixSpectrum;
95  break;
96  }
97  theEnergyDistribution[i]->Init(theData);
98  }
99  }
100 
101  inline G4double Sample(G4double anEnergy, G4int & it)
102  {
103  G4double result = 0;
104  it = 0;
105  if (theNumberOfPartials != 0)
106  {
107  G4double sum=0;
108  G4double * running = new G4double[theNumberOfPartials];
109  running[0] = 0;
110  G4int i;
111  for (i=0; i<theNumberOfPartials; i++)
112  {
113  if (i!=0) running[i]=running[i-1];
114  running[i]+=theEnergyDistribution[i]->GetFractionalProbability(anEnergy);
115  }
116  sum = running[theNumberOfPartials-1];
117  G4double random = G4UniformRand();
118  for(i=0; i<theNumberOfPartials; i++)
119  {
120  it = i;
121  if(running[i]/sum>random) break;
122  }
123  delete [] running;
124  if(it==theNumberOfPartials) it--;
125  result = theEnergyDistribution[it]->Sample(anEnergy);
126  }
127  return result;
128  }
129 
130  private:
131 
132  G4int theNumberOfPartials;
133  G4int theRepresentationType;
134  G4VParticleHPEDis ** theEnergyDistribution;
135 };
136 
137 #endif
G4double G4ParticleHPJENDLHEData::G4double result
int G4int
Definition: G4Types.hh:78
G4double Sample(G4double anEnergy, G4int &it)
virtual G4double GetFractionalProbability(G4double anEnergy)=0
virtual G4double Sample(G4double anEnergy)=0
#define G4UniformRand()
Definition: Randomize.hh:97
virtual void Init(std::istream &theData)=0
double G4double
Definition: G4Types.hh:76