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G4ParticleHPAngularP.hh
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28 // P. Arce, June-2014 Conversion neutron_hp to particle_hp
29 //
30 #ifndef G4ParticleHPAngularP_h
31 #define G4ParticleHPAngularP_h 1
32 
34 
35 #include "globals.hh"
37 
39 {
40  public:
41 
43  {
44  theCosTh = NULL;
45  theProb = NULL;
46  theEnergy = 0.;
47  nCoeff = 0;
48  }
50  {
51  if(theCosTh!=0) delete [] theCosTh;
52  if(theProb!=0) delete [] theProb;
53  }
54 
55  inline void Init(std::istream & aDataFile)
56  {
57  G4double eNeu, cosTheta, probDist;
58  G4int nProb;
59  aDataFile >> eNeu >> nProb;
60  theManager.Init(aDataFile);
61  eNeu *= CLHEP::eV;
62  Init(eNeu, nProb);
63  for (G4int iii=0; iii<nProb; iii++)
64  {
65  aDataFile >> cosTheta >> probDist;
66  SetCosTh(iii, cosTheta);
67  SetProb(iii,probDist);
68  }
69  }
70 
71  inline void Init(G4double e, G4int n)
72  {
73  theCosTh = new G4double[n];
74  theProb = new G4double[n];
75  theEnergy = e;
76  nCoeff = n;
77  }
78 
79  inline void SetEnergy(G4double energy){ theEnergy = energy; }
80  inline void SetCosTh(G4int l, G4double coeff) {theCosTh[l]=coeff;}
81  inline void SetProb(G4int l, G4double coeff) {theProb[l]=coeff;}
82 
83  inline G4double GetCosTh(G4int l) {return theCosTh[l];}
84  inline G4double GetProb(G4int l) {return theProb[l];}
85  inline G4double GetEnergy(){return theEnergy;}
86  inline G4int GetNumberOfPoints(){ return nCoeff; }
87  inline G4double GetCosTh()
88  {
89  G4int i;
90  G4double rand = G4UniformRand();
91  G4double run=0, runo=0;
92  for (i=0; i<GetNumberOfPoints(); i++)
93  {
94  runo=run;
95  run += GetProb(i);
96  if(run>rand) break;
97  }
98  if(i == GetNumberOfPoints()) i--;
99  G4double costh = theInt.Interpolate(theManager.GetScheme(i), rand,
100  runo, run, GetCosTh(i-1), GetCosTh(i));
101  return costh;
102  }
103 
104  private:
105 
106  G4double theEnergy; // neutron energy
107  G4ParticleHPInterpolator theInt; // knows tointerpolate
108  G4int nCoeff;
109  G4InterpolationManager theManager; // knows the interpolation between stores
110  G4double * theCosTh;
111  G4double * theProb; // probability distribution as fcn of theta
112  // integral normalised to 1.
113 };
114 #endif
void Init(std::istream &aDataFile)
void Init(G4int aScheme, G4int aRange)
void SetEnergy(G4double energy)
G4double GetCosTh(G4int l)
int G4int
Definition: G4Types.hh:78
void Init(G4double e, G4int n)
#define G4UniformRand()
Definition: Randomize.hh:97
G4InterpolationScheme GetScheme(G4int index) const
const G4int n
void SetCosTh(G4int l, G4double coeff)
G4double Interpolate(G4InterpolationScheme aScheme, G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const
static constexpr double eV
G4double energy(const ThreeVector &p, const G4double m)
double G4double
Definition: G4Types.hh:76
G4double GetProb(G4int l)
void SetProb(G4int l, G4double coeff)