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25 // 25 //
26 // INCL++ intra-nuclear cascade model 26 // INCL++ intra-nuclear cascade model
27 // Alain Boudard, CEA-Saclay, France 27 // Alain Boudard, CEA-Saclay, France
28 // Joseph Cugnon, University of Liege, Belgium 28 // Joseph Cugnon, University of Liege, Belgium
29 // Jean-Christophe David, CEA-Saclay, France 29 // Jean-Christophe David, CEA-Saclay, France
30 // Pekka Kaitaniemi, CEA-Saclay, France, and H 30 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
31 // Sylvie Leray, CEA-Saclay, France 31 // Sylvie Leray, CEA-Saclay, France
32 // Davide Mancusi, CEA-Saclay, France 32 // Davide Mancusi, CEA-Saclay, France
33 // 33 //
34 #define INCLXX_IN_GEANT4_MODE 1 34 #define INCLXX_IN_GEANT4_MODE 1
35 35
36 #include "globals.hh" 36 #include "globals.hh"
37 37
38 /** \file G4INCLIFunction1D.cc 38 /** \file G4INCLIFunction1D.cc
39 * \brief Functor for 1-dimensional mathematic 39 * \brief Functor for 1-dimensional mathematical functions
40 * 40 *
41 * \date 16 July 2011 41 * \date 16 July 2011
42 * \author Davide Mancusi 42 * \author Davide Mancusi
43 */ 43 */
44 44
45 #include <algorithm> 45 #include <algorithm>
46 #include <cmath> 46 #include <cmath>
47 #include <cstdlib> 47 #include <cstdlib>
48 #include "G4INCLIFunction1D.hh" 48 #include "G4INCLIFunction1D.hh"
49 #include "G4INCLLogger.hh" 49 #include "G4INCLLogger.hh"
50 #include "G4INCLInvFInterpolationTable.hh" 50 #include "G4INCLInvFInterpolationTable.hh"
51 51
52 namespace G4INCL { 52 namespace G4INCL {
53 53
54 const G4double IFunction1D::integrationCoeff 54 const G4double IFunction1D::integrationCoefficients[] = {
55 2.*95.0/288.0, 55 2.*95.0/288.0,
56 317.0/240.0, 56 317.0/240.0,
57 23.0/30.0, 57 23.0/30.0,
58 793.0/720.0, 58 793.0/720.0,
59 157.0/160.0, 59 157.0/160.0,
60 157.0/160.0, 60 157.0/160.0,
61 793.0/720.0, 61 793.0/720.0,
62 23.0/30.0, 62 23.0/30.0,
63 317.0/240.0, 63 317.0/240.0,
64 }; 64 };
65 65
66 G4double IFunction1D::integrate(const G4doub 66 G4double IFunction1D::integrate(const G4double x0, const G4double x1, const G4double step) const {
67 G4double xi = std::max(x0, xMin); 67 G4double xi = std::max(x0, xMin);
68 G4double xa = std::min(x1, xMax); 68 G4double xa = std::min(x1, xMax);
69 G4double sign; 69 G4double sign;
70 70
71 if(x1 <= x0) { 71 if(x1 <= x0) {
72 sign = -1.0; 72 sign = -1.0;
73 std::swap(xi, xa); 73 std::swap(xi, xa);
74 } else 74 } else
75 sign = 1.0; 75 sign = 1.0;
76 76
77 const G4double interval = xa - xi; 77 const G4double interval = xa - xi;
78 78
79 G4int nIntervals; 79 G4int nIntervals;
80 if(step<0.) { 80 if(step<0.) {
81 nIntervals = 45; 81 nIntervals = 45;
82 } else { 82 } else {
83 nIntervals = G4int(interval/step); 83 nIntervals = G4int(interval/step);
84 84
85 // Round up nIntervals to the closest mu 85 // Round up nIntervals to the closest multiple of 9
86 G4int remainder = nIntervals % 9; 86 G4int remainder = nIntervals % 9;
87 if (remainder != 0) 87 if (remainder != 0)
88 nIntervals += 9 - remainder; 88 nIntervals += 9 - remainder;
89 89
90 nIntervals = std::max(nIntervals, 9); 90 nIntervals = std::max(nIntervals, 9);
91 } 91 }
92 92
93 const G4double dx = interval/nIntervals; 93 const G4double dx = interval/nIntervals;
94 G4double result = (operator()(xi) + operat 94 G4double result = (operator()(xi) + operator()(xa)) * integrationCoefficients[0]/2;
95 for(G4int j = 1; j<nIntervals; ++j) { 95 for(G4int j = 1; j<nIntervals; ++j) {
96 const G4double x = xi + interval*G4doubl 96 const G4double x = xi + interval*G4double(j)/G4double(nIntervals);
97 const unsigned index = j%9; 97 const unsigned index = j%9;
98 result += operator()(x) * integrationCoe 98 result += operator()(x) * integrationCoefficients[index];
99 } 99 }
100 100
101 return result*dx*sign; 101 return result*dx*sign;
102 102
103 } 103 }
104 104
105 IFunction1D *IFunction1D::primitive() const 105 IFunction1D *IFunction1D::primitive() const {
106 class Primitive : public IFunction1D { 106 class Primitive : public IFunction1D {
107 public: 107 public:
108 Primitive(IFunction1D const * const f) 108 Primitive(IFunction1D const * const f) :
109 IFunction1D(f->getXMinimum(), f->get 109 IFunction1D(f->getXMinimum(), f->getXMaximum()),
110 theFunction(f) 110 theFunction(f)
111 {} 111 {}
112 112
113 G4double operator()(const G4double x) 113 G4double operator()(const G4double x) const {
114 return theFunction->integrate(xMin,x 114 return theFunction->integrate(xMin,x);
115 } 115 }
116 private: 116 private:
117 IFunction1D const * const theFunction; 117 IFunction1D const * const theFunction;
118 } *thePrimitive = new Primitive(this); 118 } *thePrimitive = new Primitive(this);
119 119
120 return thePrimitive; 120 return thePrimitive;
121 } 121 }
122 122
123 InterpolationTable *IFunction1D::inverseCDFT 123 InterpolationTable *IFunction1D::inverseCDFTable(IFunction1D::ManipulatorFunc fWrap, const G4int nNodes) const {
124 class InverseCDF : public IFunction1D { 124 class InverseCDF : public IFunction1D {
125 public: 125 public:
126 InverseCDF(IFunction1D const * const f 126 InverseCDF(IFunction1D const * const f, ManipulatorFunc fw) :
127 IFunction1D(f->getXMinimum(), f->get 127 IFunction1D(f->getXMinimum(), f->getXMaximum()),
128 theFunction(f), 128 theFunction(f),
129 normalisation(1./theFunction->integr 129 normalisation(1./theFunction->integrate(xMin,xMax)),
130 fWrap(fw) 130 fWrap(fw)
131 {} 131 {}
132 132
133 G4double operator()(const G4double x) 133 G4double operator()(const G4double x) const {
134 if(fWrap) 134 if(fWrap)
135 return fWrap(std::min(1., normalis 135 return fWrap(std::min(1., normalisation * theFunction->integrate(xMin,x)));
136 else 136 else
137 return std::min(1., normalisation 137 return std::min(1., normalisation * theFunction->integrate(xMin,x));
138 } 138 }
139 private: 139 private:
140 IFunction1D const * const theFunction; 140 IFunction1D const * const theFunction;
141 const G4double normalisation; 141 const G4double normalisation;
142 ManipulatorFunc fWrap; 142 ManipulatorFunc fWrap;
143 } *theInverseCDF = new InverseCDF(this, fW 143 } *theInverseCDF = new InverseCDF(this, fWrap);
144 144
145 InterpolationTable *theTable = new InvFInt 145 InterpolationTable *theTable = new InvFInterpolationTable(*theInverseCDF, nNodes);
146 delete theInverseCDF; 146 delete theInverseCDF;
147 return theTable; 147 return theTable;
148 } 148 }
149 } 149 }
150 150
151 151