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25 // 25 //
26 // G4ImportanceAlgorithm implementation <<
27 // 26 //
28 // Author: Michael Dressel (CERN), 2002 << 27 // $Id: G4ImportanceAlgorithm.cc,v 1.14 2006/06/29 18:17:20 gunter Exp $
>> 28 // GEANT4 tag $Name: geant4-08-02 $
>> 29 //
>> 30 // ----------------------------------------------------------------------
>> 31 // GEANT 4 class source file
>> 32 //
>> 33 // G4ImportanceAlgorithm.cc
>> 34 //
29 // ------------------------------------------- 35 // ----------------------------------------------------------------------
30 36
31 #include "G4Types.hh" 37 #include "G4Types.hh"
>> 38 #include <sstream>
32 #include "Randomize.hh" 39 #include "Randomize.hh"
33 #include "G4Threading.hh" <<
34 #include "G4AutoLock.hh" <<
35 40
36 #include "G4ImportanceAlgorithm.hh" 41 #include "G4ImportanceAlgorithm.hh"
37 42
38 #include <sstream> << 43 G4ImportanceAlgorithm::G4ImportanceAlgorithm(): fWorned(false)
>> 44 {}
39 45
40 namespace << 46 G4ImportanceAlgorithm::~G4ImportanceAlgorithm()
41 { 47 {
42 G4Mutex ImportanceMutex = G4MUTEX_INITIALIZE << 48 if(fWorned) {
>> 49 G4cout << G4endl;
>> 50 Warning("~G4ImportanceAlgorithm: ipre_over_ipost ! in [0.25, 4] seen");
>> 51 G4cout << G4endl;
>> 52 }
43 } 53 }
44 54
45 G4ImportanceAlgorithm::G4ImportanceAlgorithm() <<
46 <<
47 G4ImportanceAlgorithm::~G4ImportanceAlgorithm( <<
48 <<
49 G4Nsplit_Weight 55 G4Nsplit_Weight
50 G4ImportanceAlgorithm::Calculate(G4double ipre 56 G4ImportanceAlgorithm::Calculate(G4double ipre,
51 G4double ipos << 57 G4double ipost,
52 G4double init 58 G4double init_w) const
53 { 59 {
54 G4AutoLock l(&ImportanceMutex); << 60 G4Nsplit_Weight nw = {0,0};
55 G4Nsplit_Weight nw; << 61 if (ipost>0.){
56 if (ipost>0.) << 62 if (!(ipre>0.)){
57 { << 63 Error("G4ImportanceAlgorithm::Calculate() - ipre==0.");
58 if (!(ipre>0.)) <<
59 { <<
60 Error("Calculate() - ipre==0."); <<
61 } 64 }
62 G4double ipre_over_ipost = ipre/ipost; 65 G4double ipre_over_ipost = ipre/ipost;
63 if ((ipre_over_ipost<0.25 || ipre_over_ipo << 66 if ((ipre_over_ipost<0.25 || ipre_over_ipost> 4) && !fWorned) {
64 { <<
65 std::ostringstream os; 67 std::ostringstream os;
66 os << "Calculate() - ipre_over_ipost ! i << 68 os << "Calculate: ipre_over_ipost ! in [0.25, 4]: ipre_over_ipost = "
67 << "ipre_over_ipost = " << ipre_over_ << 69 << ipre_over_ipost << '\0' << G4endl;
68 Warning(os.str()); 70 Warning(os.str());
69 fWarned = true; << 71 fWorned = true;
70 if (ipre_over_ipost<=0) << 72 if (ipre_over_ipost<=0) {
71 { << 73 Error("G4ImportanceAlgorithm::Calculate() - ipre_over_ipost<=0");
72 Error("Calculate() - ipre_over_ipost<= <<
73 } 74 }
74 } 75 }
75 if (init_w<=0.) << 76 if (init_w<=0.) {
76 { << 77 Error("G4ImportanceAlgorithm::Calculate() - iniitweight<= 0. found");
77 Error("Calculate() - iniitweight<= 0. fo <<
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 if ( static_cast<G4double>(nw.fN) != inv) {
90 if ( static_cast<G4double>(nw.fN) != inv << 90 // double mode
91 { << 91 // probability p for splitting into n+1 tracks
92 // double mode << 92 G4double p = inv - nw.fN;
93 // probability p for splitting into n+ << 93 // get a random number out of [0,1)
94 G4double p = inv - nw.fN; << 94 G4double r = G4UniformRand();
95 // get a random number out of [0,1) << 95 if (r<p) {
96 G4double r = G4UniformRand(); << 96 nw.fN++;
97 if (r<p) << 97 }
98 { <<
99 ++nw.fN; <<
100 } <<
101 } 98 }
102 } 99 }
103 else if (ipre_over_ipost>1) // russian r << 100 // ipre_over_ipost > 1
104 { << 101 // russian roulett
>> 102 else if (ipre_over_ipost>1) {
105 // probabiity for killing track 103 // probabiity for killing track
106 G4double p = 1-inv; 104 G4double p = 1-inv;
107 // get a random number out of [0,1) 105 // get a random number out of [0,1)
108 G4double r = G4UniformRand(); 106 G4double r = G4UniformRand();
109 if (r<p) << 107 if (r<p) {
110 { << 108 // kill track
111 // kill track << 109 nw.fN = 0;
112 nw.fN = 0; << 110 nw.fW = 0;
113 nw.fW = 0; <<
114 } 111 }
115 else << 112 else {
116 { << 113 nw.fN = 1;
117 nw.fN = 1; <<
118 } 114 }
119 } 115 }
120 } 116 }
121 l.unlock(); <<
122 <<
123 return nw; 117 return nw;
124 } 118 }
125 119
126 void G4ImportanceAlgorithm::Error(const G4Stri << 120 void G4ImportanceAlgorithm::Error(const G4String &m) const
127 { 121 {
>> 122 G4cerr << "ERROR - G4ImportanceAlgorithm: " << m << G4endl;
128 G4Exception("G4ImportanceAlgorithm::Error()" 123 G4Exception("G4ImportanceAlgorithm::Error()",
129 "GeomBias0002", FatalException, << 124 "FatalException", FatalException, m);
130 } 125 }
131 126
132 void G4ImportanceAlgorithm::Warning(const G4St << 127 void G4ImportanceAlgorithm::Warning(const G4String &m) const
133 { 128 {
134 G4Exception("G4ImportanceAlgorithm::Warning( 129 G4Exception("G4ImportanceAlgorithm::Warning()",
135 "GeomBias1001", JustWarning, msg << 130 "Notification", JustWarning, m);
136 } 131 }
137 132