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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 <sstream>
32 #include "Randomize.hh" 33 #include "Randomize.hh"
33 #include "G4Threading.hh" 34 #include "G4Threading.hh"
34 #include "G4AutoLock.hh" <<
35 35
36 #include "G4ImportanceAlgorithm.hh" 36 #include "G4ImportanceAlgorithm.hh"
37 37
38 #include <sstream> << 38 #ifdef G4MULTITHREADED
>> 39 G4Mutex G4ImportanceAlgorithm::ImportanceMutex = G4MUTEX_INITIALIZER;
>> 40 #endif
39 41
40 namespace << 42 G4ImportanceAlgorithm::G4ImportanceAlgorithm()
41 { 43 {
42 G4Mutex ImportanceMutex = G4MUTEX_INITIALIZE <<
43 } 44 }
44 45
45 G4ImportanceAlgorithm::G4ImportanceAlgorithm() << 46 G4ImportanceAlgorithm::~G4ImportanceAlgorithm()
46 << 47 {
47 G4ImportanceAlgorithm::~G4ImportanceAlgorithm( << 48 }
48 49
49 G4Nsplit_Weight 50 G4Nsplit_Weight
50 G4ImportanceAlgorithm::Calculate(G4double ipre 51 G4ImportanceAlgorithm::Calculate(G4double ipre,
51 G4double ipos 52 G4double ipost,
52 G4double init 53 G4double init_w) const
53 { 54 {
54 G4AutoLock l(&ImportanceMutex); << 55
>> 56 #ifdef G4MULTITHREADED
>> 57 G4MUTEXLOCK(&G4ImportanceAlgorithm::ImportanceMutex);
>> 58 #endif
>> 59
55 G4Nsplit_Weight nw; 60 G4Nsplit_Weight nw;
56 if (ipost>0.) 61 if (ipost>0.)
57 { 62 {
58 if (!(ipre>0.)) 63 if (!(ipre>0.))
59 { 64 {
60 Error("Calculate() - ipre==0."); 65 Error("Calculate() - ipre==0.");
61 } 66 }
62 G4double ipre_over_ipost = ipre/ipost; 67 G4double ipre_over_ipost = ipre/ipost;
63 if ((ipre_over_ipost<0.25 || ipre_over_ipo 68 if ((ipre_over_ipost<0.25 || ipre_over_ipost> 4) && !fWarned)
64 { 69 {
65 std::ostringstream os; 70 std::ostringstream os;
66 os << "Calculate() - ipre_over_ipost ! i 71 os << "Calculate() - ipre_over_ipost ! in [0.25, 4]." << G4endl
67 << "ipre_over_ipost = " << ipre_over_ 72 << "ipre_over_ipost = " << ipre_over_ipost << ".";
68 Warning(os.str()); 73 Warning(os.str());
69 fWarned = true; 74 fWarned = true;
70 if (ipre_over_ipost<=0) 75 if (ipre_over_ipost<=0)
71 { 76 {
72 Error("Calculate() - ipre_over_ipost<= 77 Error("Calculate() - ipre_over_ipost<=0.");
73 } 78 }
74 } 79 }
75 if (init_w<=0.) 80 if (init_w<=0.)
76 { 81 {
77 Error("Calculate() - iniitweight<= 0. fo 82 Error("Calculate() - iniitweight<= 0. found!");
78 } 83 }
79 84
80 // default geometrical splitting 85 // default geometrical splitting
81 // in integer mode 86 // in integer mode
82 // for ipre_over_ipost <= 1 87 // for ipre_over_ipost <= 1
83 G4double inv = 1./ipre_over_ipost; 88 G4double inv = 1./ipre_over_ipost;
84 nw.fN = static_cast<G4int>(inv); 89 nw.fN = static_cast<G4int>(inv);
85 nw.fW = init_w * ipre_over_ipost; 90 nw.fW = init_w * ipre_over_ipost;
86 91
87 // geometrical splitting for double mode 92 // geometrical splitting for double mode
88 if (ipre_over_ipost<1) 93 if (ipre_over_ipost<1)
89 { 94 {
90 if ( static_cast<G4double>(nw.fN) != inv 95 if ( static_cast<G4double>(nw.fN) != inv)
91 { 96 {
92 // double mode 97 // double mode
93 // probability p for splitting into n+ 98 // probability p for splitting into n+1 tracks
94 G4double p = inv - nw.fN; 99 G4double p = inv - nw.fN;
95 // get a random number out of [0,1) 100 // get a random number out of [0,1)
96 G4double r = G4UniformRand(); 101 G4double r = G4UniformRand();
97 if (r<p) 102 if (r<p)
98 { 103 {
99 ++nw.fN; 104 ++nw.fN;
100 } 105 }
101 } 106 }
102 } 107 }
103 else if (ipre_over_ipost>1) // russian r 108 else if (ipre_over_ipost>1) // russian roulette
104 { 109 {
105 // probabiity for killing track 110 // probabiity for killing track
106 G4double p = 1-inv; 111 G4double p = 1-inv;
107 // get a random number out of [0,1) 112 // get a random number out of [0,1)
108 G4double r = G4UniformRand(); 113 G4double r = G4UniformRand();
109 if (r<p) 114 if (r<p)
110 { 115 {
111 // kill track 116 // kill track
112 nw.fN = 0; 117 nw.fN = 0;
113 nw.fW = 0; 118 nw.fW = 0;
114 } 119 }
115 else 120 else
116 { 121 {
117 nw.fN = 1; 122 nw.fN = 1;
118 } 123 }
119 } 124 }
120 } 125 }
121 l.unlock(); << 126 #ifdef G4MULTITHREADED
122 << 127 G4MUTEXUNLOCK(&G4ImportanceAlgorithm::ImportanceMutex);
>> 128 #endif
123 return nw; 129 return nw;
124 } 130 }
125 131
126 void G4ImportanceAlgorithm::Error(const G4Stri 132 void G4ImportanceAlgorithm::Error(const G4String& msg) const
127 { 133 {
128 G4Exception("G4ImportanceAlgorithm::Error()" 134 G4Exception("G4ImportanceAlgorithm::Error()",
129 "GeomBias0002", FatalException, 135 "GeomBias0002", FatalException, msg);
130 } 136 }
131 137
132 void G4ImportanceAlgorithm::Warning(const G4St 138 void G4ImportanceAlgorithm::Warning(const G4String& msg) const
133 { 139 {
134 G4Exception("G4ImportanceAlgorithm::Warning( 140 G4Exception("G4ImportanceAlgorithm::Warning()",
135 "GeomBias1001", JustWarning, msg 141 "GeomBias1001", JustWarning, msg);
136 } 142 }
137 143