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25 // 25 //
26 // G4ImportanceAlgorithm implementation 26 // G4ImportanceAlgorithm implementation
27 // 27 //
28 // Author: Michael Dressel (CERN), 2002 28 // Author: Michael Dressel (CERN), 2002
29 // ------------------------------------------- 29 // ----------------------------------------------------------------------
30 30
31 #include "G4Types.hh" 31 #include "G4Types.hh"
32 #include "Randomize.hh" 32 #include "Randomize.hh"
33 #include "G4Threading.hh" 33 #include "G4Threading.hh"
34 #include "G4AutoLock.hh" 34 #include "G4AutoLock.hh"
35 35
36 #include "G4ImportanceAlgorithm.hh" 36 #include "G4ImportanceAlgorithm.hh"
37 37
38 #include <sstream> 38 #include <sstream>
39 39
40 namespace 40 namespace
41 { 41 {
42 G4Mutex ImportanceMutex = G4MUTEX_INITIALIZE 42 G4Mutex ImportanceMutex = G4MUTEX_INITIALIZER;
43 } 43 }
44 44
45 G4ImportanceAlgorithm::G4ImportanceAlgorithm() 45 G4ImportanceAlgorithm::G4ImportanceAlgorithm() = default;
46 46
47 G4ImportanceAlgorithm::~G4ImportanceAlgorithm( 47 G4ImportanceAlgorithm::~G4ImportanceAlgorithm() = default;
48 48
49 G4Nsplit_Weight 49 G4Nsplit_Weight
50 G4ImportanceAlgorithm::Calculate(G4double ipre 50 G4ImportanceAlgorithm::Calculate(G4double ipre,
51 G4double ipos 51 G4double ipost,
52 G4double init 52 G4double init_w) const
53 { 53 {
54 G4AutoLock l(&ImportanceMutex); 54 G4AutoLock l(&ImportanceMutex);
55 G4Nsplit_Weight nw; 55 G4Nsplit_Weight nw;
56 if (ipost>0.) 56 if (ipost>0.)
57 { 57 {
58 if (!(ipre>0.)) 58 if (!(ipre>0.))
59 { 59 {
60 Error("Calculate() - ipre==0."); 60 Error("Calculate() - ipre==0.");
61 } 61 }
62 G4double ipre_over_ipost = ipre/ipost; 62 G4double ipre_over_ipost = ipre/ipost;
63 if ((ipre_over_ipost<0.25 || ipre_over_ipo 63 if ((ipre_over_ipost<0.25 || ipre_over_ipost> 4) && !fWarned)
64 { 64 {
65 std::ostringstream os; 65 std::ostringstream os;
66 os << "Calculate() - ipre_over_ipost ! i 66 os << "Calculate() - ipre_over_ipost ! in [0.25, 4]." << G4endl
67 << "ipre_over_ipost = " << ipre_over_ 67 << "ipre_over_ipost = " << ipre_over_ipost << ".";
68 Warning(os.str()); 68 Warning(os.str());
69 fWarned = true; 69 fWarned = true;
70 if (ipre_over_ipost<=0) 70 if (ipre_over_ipost<=0)
71 { 71 {
72 Error("Calculate() - ipre_over_ipost<= 72 Error("Calculate() - ipre_over_ipost<=0.");
73 } 73 }
74 } 74 }
75 if (init_w<=0.) 75 if (init_w<=0.)
76 { 76 {
77 Error("Calculate() - iniitweight<= 0. fo 77 Error("Calculate() - iniitweight<= 0. found!");
78 } 78 }
79 79
80 // default geometrical splitting 80 // default geometrical splitting
81 // in integer mode 81 // in integer mode
82 // for ipre_over_ipost <= 1 82 // for ipre_over_ipost <= 1
83 G4double inv = 1./ipre_over_ipost; 83 G4double inv = 1./ipre_over_ipost;
84 nw.fN = static_cast<G4int>(inv); 84 nw.fN = static_cast<G4int>(inv);
85 nw.fW = init_w * ipre_over_ipost; 85 nw.fW = init_w * ipre_over_ipost;
86 86
87 // geometrical splitting for double mode 87 // geometrical splitting for double mode
88 if (ipre_over_ipost<1) 88 if (ipre_over_ipost<1)
89 { 89 {
90 if ( static_cast<G4double>(nw.fN) != inv 90 if ( static_cast<G4double>(nw.fN) != inv)
91 { 91 {
92 // double mode 92 // double mode
93 // probability p for splitting into n+ 93 // probability p for splitting into n+1 tracks
94 G4double p = inv - nw.fN; 94 G4double p = inv - nw.fN;
95 // get a random number out of [0,1) 95 // get a random number out of [0,1)
96 G4double r = G4UniformRand(); 96 G4double r = G4UniformRand();
97 if (r<p) 97 if (r<p)
98 { 98 {
99 ++nw.fN; 99 ++nw.fN;
100 } 100 }
101 } 101 }
102 } 102 }
103 else if (ipre_over_ipost>1) // russian r 103 else if (ipre_over_ipost>1) // russian roulette
104 { 104 {
105 // probabiity for killing track 105 // probabiity for killing track
106 G4double p = 1-inv; 106 G4double p = 1-inv;
107 // get a random number out of [0,1) 107 // get a random number out of [0,1)
108 G4double r = G4UniformRand(); 108 G4double r = G4UniformRand();
109 if (r<p) 109 if (r<p)
110 { 110 {
111 // kill track 111 // kill track
112 nw.fN = 0; 112 nw.fN = 0;
113 nw.fW = 0; 113 nw.fW = 0;
114 } 114 }
115 else 115 else
116 { 116 {
117 nw.fN = 1; 117 nw.fN = 1;
118 } 118 }
119 } 119 }
120 } 120 }
121 l.unlock(); 121 l.unlock();
122 122
123 return nw; 123 return nw;
124 } 124 }
125 125
126 void G4ImportanceAlgorithm::Error(const G4Stri 126 void G4ImportanceAlgorithm::Error(const G4String& msg) const
127 { 127 {
128 G4Exception("G4ImportanceAlgorithm::Error()" 128 G4Exception("G4ImportanceAlgorithm::Error()",
129 "GeomBias0002", FatalException, 129 "GeomBias0002", FatalException, msg);
130 } 130 }
131 131
132 void G4ImportanceAlgorithm::Warning(const G4St 132 void G4ImportanceAlgorithm::Warning(const G4String& msg) const
133 { 133 {
134 G4Exception("G4ImportanceAlgorithm::Warning( 134 G4Exception("G4ImportanceAlgorithm::Warning()",
135 "GeomBias1001", JustWarning, msg 135 "GeomBias1001", JustWarning, msg);
136 } 136 }
137 137