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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4NeutronHPAngularP.hh,v 1.11 2007/06/06 12:45:13 ahoward Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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29 | // |
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30 | #ifndef G4NeutronHPAngularP_h |
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31 | #define G4NeutronHPAngularP_h 1 |
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32 | |
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33 | #include "globals.hh" |
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34 | #include "G4InterpolationManager.hh" |
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35 | |
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36 | class G4NeutronHPAngularP |
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37 | { |
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38 | public: |
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39 | |
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40 | G4NeutronHPAngularP() |
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41 | { |
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42 | theCosTh = 0; |
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43 | theProb = 0; |
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44 | } |
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45 | ~G4NeutronHPAngularP() |
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46 | { |
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47 | if(theCosTh!=0) delete [] theCosTh; |
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48 | if(theProb!=0) delete [] theProb; |
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49 | } |
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50 | |
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51 | inline void Init(std::ifstream & aDataFile) |
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52 | { |
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53 | G4double eNeu, cosTheta, probDist; |
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54 | G4int nProb; |
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55 | aDataFile >> eNeu >> nProb; |
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56 | theManager.Init(aDataFile); |
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57 | eNeu *= eV; |
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58 | Init(eNeu, nProb); |
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59 | for (G4int iii=0; iii<nProb; iii++) |
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60 | { |
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61 | aDataFile >> cosTheta >> probDist; |
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62 | SetCosTh(iii, cosTheta); |
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63 | SetProb(iii,probDist); |
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64 | } |
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65 | } |
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66 | |
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67 | inline void Init(G4double e, G4int n) |
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68 | { |
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69 | theCosTh = new G4double[n]; |
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70 | theProb = new G4double[n]; |
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71 | theEnergy = e; |
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72 | nCoeff = n; |
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73 | } |
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74 | |
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75 | inline void SetEnergy(G4double energy){ theEnergy = energy; } |
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76 | inline void SetCosTh(G4int l, G4double coeff) {theCosTh[l]=coeff;} |
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77 | inline void SetProb(G4int l, G4double coeff) {theProb[l]=coeff;} |
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78 | |
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79 | inline G4double GetCosTh(G4int l) {return theCosTh[l];} |
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80 | inline G4double GetProb(G4int l) {return theProb[l];} |
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81 | inline G4double GetEnergy(){return theEnergy;} |
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82 | inline G4int GetNumberOfPoints(){ return nCoeff; } |
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83 | inline G4double GetCosTh() |
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84 | { |
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85 | G4int i; |
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86 | G4double rand = G4UniformRand(); |
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87 | G4double run=0, runo=0; |
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88 | for (i=0; i<GetNumberOfPoints(); i++) |
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89 | { |
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90 | runo=run; |
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91 | run += GetProb(i); |
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92 | if(run>rand) break; |
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93 | } |
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94 | if(i == GetNumberOfPoints()) i--; |
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95 | G4double costh = theInt.Interpolate(theManager.GetScheme(i), rand, |
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96 | runo, run, GetCosTh(i-1), GetCosTh(i)); |
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97 | return costh; |
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98 | } |
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99 | |
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100 | private: |
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101 | |
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102 | G4double theEnergy; // neutron energy |
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103 | G4NeutronHPInterpolator theInt; // knows tointerpolate |
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104 | G4int nCoeff; |
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105 | G4InterpolationManager theManager; // knows the interpolation between stores |
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106 | G4double * theCosTh; |
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107 | G4double * theProb; // probability distribution as fcn of theta |
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108 | // integral normalised to 1. |
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109 | }; |
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110 | #endif |
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