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27 //
28 // P. Arce, June-2014 Conversion neutron_hp to particle_hp
29 //
30 #ifndef G4ParticleHPArbitaryTab_h
31 #define G4ParticleHPArbitaryTab_h 1
32
33 #include "G4InterpolationManager.hh"
34 #include "G4ParticleHPVector.hh"
35 #include "G4VParticleHPEDis.hh"
36 #include "G4ios.hh"
37 #include "Randomize.hh"
38 #include "globals.hh"
39
40 #include <CLHEP/Units/SystemOfUnits.h>
41
42 #include <fstream>
43
44 // we will need a List of these .... one per term.
45
46 class G4ParticleHPArbitaryTab : public G4VParticleHPEDis
47 {
48 public:
49 G4ParticleHPArbitaryTab()
50 {
51 theDistFunc = nullptr;
52 nDistFunc = 0;
53 }
54 ~G4ParticleHPArbitaryTab() override { delete[] theDistFunc; }
55
56 inline void Init(std::istream& theData) override
57 {
58 std::size_t i;
59 theFractionalProb.Init(theData, CLHEP::eV);
60 theData >> nDistFunc; // = number of incoming n energy points
61 const std::size_t dsize = nDistFunc > 0 ? nDistFunc : 1;
62 theDistFunc = new G4ParticleHPVector[dsize];
63 theManager.Init(theData);
64 G4double currentEnergy;
65 for (i = 0; i < dsize; ++i) {
66 theData >> currentEnergy;
67 theDistFunc[i].SetLabel(currentEnergy * CLHEP::eV);
68 theDistFunc[i].Init(theData, CLHEP::eV);
69 theDistFunc[i].IntegrateAndNormalise();
70 //************************************************************************
71 // EMendoza:
72 // ThinOut() assumes that the data is linear-linear, what is false:
73 // theDistFunc[i].ThinOut(0.02); // @@@ optimization to be finished.
74 //************************************************************************
75 }
76
77 //************************************************************************
78 // EMendoza:
79 // Here we calculate the thresholds for the 2D sampling:
80 for (i = 0; i < dsize; ++i) {
81 G4int np = theDistFunc[i].GetVectorLength();
82 theLowThreshold[i] = theDistFunc[i].GetEnergy(0);
83 theHighThreshold[i] = theDistFunc[i].GetEnergy(np - 1);
84 for (G4int j = 0; j < np - 1; ++j) {
85 if (theDistFunc[i].GetXsec(j + 1) > 1.e-20) {
86 theLowThreshold[i] = theDistFunc[i].GetEnergy(j);
87 break;
88 }
89 }
90 for (G4int j = 1; j < np; ++j) {
91 if (theDistFunc[i].GetXsec(j - 1) > 1.e-20) {
92 theHighThreshold[i] = theDistFunc[i].GetEnergy(j);
93 }
94 }
95 }
96 //************************************************************************
97 }
98
99 inline G4double GetFractionalProbability(G4double anEnergy) override
100 {
101 return theFractionalProb.GetY(anEnergy);
102 }
103
104 G4double Sample(G4double anEnergy) override;
105
106 private:
107 G4ParticleHPVector theFractionalProb;
108 G4int nDistFunc;
109 G4InterpolationManager theManager; // knows the interpolation between stores
110 G4ParticleHPVector* theDistFunc; // one per incoming energy
111 G4ParticleHPVector theBuffer;
112 //************************************************************************
113 // EMendoza:
114 G4double theLowThreshold[1000];
115 G4double theHighThreshold[1000];
116 //************************************************************************
117 };
118
119 #endif
120