Geant4_10
G4NeutronHPAngularP.hh
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28 #ifndef G4NeutronHPAngularP_h
29 #define G4NeutronHPAngularP_h 1
30 
32 
33 #include "globals.hh"
35 
37 {
38  public:
39 
41  {
42  theCosTh = 0;
43  theProb = 0;
44  }
46  {
47  if(theCosTh!=0) delete [] theCosTh;
48  if(theProb!=0) delete [] theProb;
49  }
50 
51  inline void Init(std::istream & aDataFile)
52  {
53  G4double eNeu, cosTheta, probDist;
54  G4int nProb;
55  aDataFile >> eNeu >> nProb;
56  theManager.Init(aDataFile);
57  eNeu *= CLHEP::eV;
58  Init(eNeu, nProb);
59  for (G4int iii=0; iii<nProb; iii++)
60  {
61  aDataFile >> cosTheta >> probDist;
62  SetCosTh(iii, cosTheta);
63  SetProb(iii,probDist);
64  }
65  }
66 
67  inline void Init(G4double e, G4int n)
68  {
69  theCosTh = new G4double[n];
70  theProb = new G4double[n];
71  theEnergy = e;
72  nCoeff = n;
73  }
74 
75  inline void SetEnergy(G4double energy){ theEnergy = energy; }
76  inline void SetCosTh(G4int l, G4double coeff) {theCosTh[l]=coeff;}
77  inline void SetProb(G4int l, G4double coeff) {theProb[l]=coeff;}
78 
79  inline G4double GetCosTh(G4int l) {return theCosTh[l];}
80  inline G4double GetProb(G4int l) {return theProb[l];}
81  inline G4double GetEnergy(){return theEnergy;}
82  inline G4int GetNumberOfPoints(){ return nCoeff; }
83  inline G4double GetCosTh()
84  {
85  G4int i;
86  G4double rand = G4UniformRand();
87  G4double run=0, runo=0;
88  for (i=0; i<GetNumberOfPoints(); i++)
89  {
90  runo=run;
91  run += GetProb(i);
92  if(run>rand) break;
93  }
94  if(i == GetNumberOfPoints()) i--;
95  G4double costh = theInt.Interpolate(theManager.GetScheme(i), rand,
96  runo, run, GetCosTh(i-1), GetCosTh(i));
97  return costh;
98  }
99 
100  private:
101 
102  G4double theEnergy; // neutron energy
103  G4NeutronHPInterpolator theInt; // knows tointerpolate
104  G4int nCoeff;
105  G4InterpolationManager theManager; // knows the interpolation between stores
106  G4double * theCosTh;
107  G4double * theProb; // probability distribution as fcn of theta
108  // integral normalised to 1.
109 };
110 #endif
G4double GetProb(G4int l)
void Init(G4int aScheme, G4int aRange)
void SetProb(G4int l, G4double coeff)
G4double GetCosTh(G4int l)
int G4int
Definition: G4Types.hh:78
G4double Interpolate(G4InterpolationScheme aScheme, G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const
Char_t n[5]
#define G4UniformRand()
Definition: Randomize.hh:87
double energy
Definition: plottest35.C:25
void Init(std::istream &aDataFile)
G4InterpolationScheme GetScheme(G4int index) const
void SetCosTh(G4int l, G4double coeff)
void SetEnergy(G4double energy)
void Init(G4double e, G4int n)
double G4double
Definition: G4Types.hh:76