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24 // ******************************************* 21 // ********************************************************************
25 // 22 //
26 // G4ImportanceAlgorithm implementation <<
27 // 23 //
28 // Author: Michael Dressel (CERN), 2002 << 24 // $Id: G4ImportanceAlgorithm.cc,v 1.9 2002/11/04 10:43:07 dressel Exp $
>> 25 // GEANT4 tag $Name: geant4-05-00 $
>> 26 //
>> 27 // ----------------------------------------------------------------------
>> 28 // GEANT 4 class source file
>> 29 //
>> 30 // G4ImportanceAlgorithm.cc
>> 31 //
29 // ------------------------------------------- 32 // ----------------------------------------------------------------------
30 33
31 #include "G4Types.hh" << 34 #include "g4std/strstream"
32 #include "Randomize.hh" 35 #include "Randomize.hh"
33 #include "G4Threading.hh" <<
34 #include "G4AutoLock.hh" <<
35 36
36 #include "G4ImportanceAlgorithm.hh" 37 #include "G4ImportanceAlgorithm.hh"
37 38
38 #include <sstream> << 39 G4ImportanceAlgorithm::G4ImportanceAlgorithm(): fWorned(false)
>> 40 {}
39 41
40 namespace << 42 G4ImportanceAlgorithm::~G4ImportanceAlgorithm()
41 { 43 {
42 G4Mutex ImportanceMutex = G4MUTEX_INITIALIZE << 44 if(fWorned) {
>> 45 G4cout << G4endl;
>> 46 Warning("~G4ImportanceAlgorithm: ipre_over_ipost ! in [0.25, 4] seen");
>> 47 G4cout << G4endl;
>> 48 }
43 } 49 }
44 50
45 G4ImportanceAlgorithm::G4ImportanceAlgorithm() <<
46 <<
47 G4ImportanceAlgorithm::~G4ImportanceAlgorithm( <<
48 <<
49 G4Nsplit_Weight 51 G4Nsplit_Weight
50 G4ImportanceAlgorithm::Calculate(G4double ipre 52 G4ImportanceAlgorithm::Calculate(G4double ipre,
51 G4double ipos << 53 G4double ipost,
52 G4double init 54 G4double init_w) const
53 { 55 {
54 G4AutoLock l(&ImportanceMutex); << 56 G4Nsplit_Weight nw = {0,0};
55 G4Nsplit_Weight nw; << 57 if (ipost>0.){
56 if (ipost>0.) << 58 if (!(ipre>0.)){
57 { << 59 G4Exception("Error: G4ImportanceAlgorithm::Calculate: ipre==0.");
58 if (!(ipre>0.)) <<
59 { <<
60 Error("Calculate() - ipre==0."); <<
61 } 60 }
62 G4double ipre_over_ipost = ipre/ipost; 61 G4double ipre_over_ipost = ipre/ipost;
63 if ((ipre_over_ipost<0.25 || ipre_over_ipo << 62 if ((ipre_over_ipost<0.25 || ipre_over_ipost> 4) && !fWorned) {
64 { << 63 G4std::ostrstream os;
65 std::ostringstream os; << 64 os << "Calculate: ipre_over_ipost ! in [0.25, 4]: ipre_over_ipost = "
66 os << "Calculate() - ipre_over_ipost ! i << 65 << ipre_over_ipost << '\0' << G4endl;
67 << "ipre_over_ipost = " << ipre_over_ <<
68 Warning(os.str()); 66 Warning(os.str());
69 fWarned = true; << 67 fWorned = true;
70 if (ipre_over_ipost<=0) << 68 if (ipre_over_ipost<=0) {
71 { << 69 Error("Calculate: ipre_over_ipost<=0");
72 Error("Calculate() - ipre_over_ipost<= <<
73 } 70 }
74 } 71 }
75 if (init_w<=0.) << 72 if (init_w<=0.) {
76 { << 73 Error("Calculate: iniitweight<= 0. found");
77 Error("Calculate() - iniitweight<= 0. fo <<
78 } 74 }
79 75
80 // default geometrical splitting 76 // default geometrical splitting
81 // in integer mode 77 // in integer mode
82 // for ipre_over_ipost <= 1 78 // for ipre_over_ipost <= 1
83 G4double inv = 1./ipre_over_ipost; 79 G4double inv = 1./ipre_over_ipost;
84 nw.fN = static_cast<G4int>(inv); 80 nw.fN = static_cast<G4int>(inv);
85 nw.fW = init_w * ipre_over_ipost; 81 nw.fW = init_w * ipre_over_ipost;
86 82
87 // geometrical splitting for double mode 83 // geometrical splitting for double mode
88 if (ipre_over_ipost<1) << 84 if (ipre_over_ipost<1) {
89 { << 85 if ( static_cast<G4double>(nw.fN) != inv) {
90 if ( static_cast<G4double>(nw.fN) != inv << 86 // double mode
91 { << 87 // probability p for splitting into n+1 tracks
92 // double mode << 88 G4double p = inv - nw.fN;
93 // probability p for splitting into n+ << 89 // get a random number out of [0,1)
94 G4double p = inv - nw.fN; << 90 G4double r = G4UniformRand();
95 // get a random number out of [0,1) << 91 if (r<p) {
96 G4double r = G4UniformRand(); << 92 nw.fN++;
97 if (r<p) << 93 }
98 { <<
99 ++nw.fN; <<
100 } <<
101 } 94 }
102 } 95 }
103 else if (ipre_over_ipost>1) // russian r << 96 // ipre_over_ipost > 1
104 { << 97 // russian roulett
>> 98 else if (ipre_over_ipost>1) {
105 // probabiity for killing track 99 // probabiity for killing track
106 G4double p = 1-inv; 100 G4double p = 1-inv;
107 // get a random number out of [0,1) 101 // get a random number out of [0,1)
108 G4double r = G4UniformRand(); 102 G4double r = G4UniformRand();
109 if (r<p) << 103 if (r<p) {
110 { << 104 // kill track
111 // kill track << 105 nw.fN = 0;
112 nw.fN = 0; << 106 nw.fW = 0;
113 nw.fW = 0; <<
114 } 107 }
115 else << 108 else {
116 { << 109 nw.fN = 1;
117 nw.fN = 1; <<
118 } 110 }
119 } 111 }
120 } 112 }
121 l.unlock(); <<
122 <<
123 return nw; 113 return nw;
124 } 114 }
125 115
126 void G4ImportanceAlgorithm::Error(const G4Stri << 116 void G4ImportanceAlgorithm::Error(const G4String &m) const
127 { 117 {
128 G4Exception("G4ImportanceAlgorithm::Error()" << 118 G4cout << "ERROR - G4ImportanceAlgorithm::" << m << G4endl;
129 "GeomBias0002", FatalException, << 119 G4Exception("Program aborted.");
130 } 120 }
131 121
132 void G4ImportanceAlgorithm::Warning(const G4St << 122 void G4ImportanceAlgorithm::Warning(const G4String &m) const
133 { 123 {
134 G4Exception("G4ImportanceAlgorithm::Warning( << 124 G4cout << "WARNING - G4ImportanceAlgorithm::" << m << G4endl;
135 "GeomBias1001", JustWarning, msg <<
136 } 125 }
137 126