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Geant4/geometry/biasing/src/G4WeightWindowAlgorithm.cc

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Differences between /geometry/biasing/src/G4WeightWindowAlgorithm.cc (Version 11.3.0) and /geometry/biasing/src/G4WeightWindowAlgorithm.cc (Version 7.1)


  1 //                                                  1 //
  2 // *******************************************      2 // ********************************************************************
  3 // * License and Disclaimer                    <<   3 // * DISCLAIMER                                                       *
  4 // *                                                4 // *                                                                  *
  5 // * The  Geant4 software  is  copyright of th <<   5 // * The following disclaimer summarizes all the specific disclaimers *
  6 // * the Geant4 Collaboration.  It is provided <<   6 // * of contributors to this software. The specific disclaimers,which *
  7 // * conditions of the Geant4 Software License <<   7 // * govern, are listed with their locations in:                      *
  8 // * LICENSE and available at  http://cern.ch/ <<   8 // *   http://cern.ch/geant4/license                                  *
  9 // * include a list of copyright holders.      << 
 10 // *                                                9 // *                                                                  *
 11 // * Neither the authors of this software syst     10 // * Neither the authors of this software system, nor their employing *
 12 // * institutes,nor the agencies providing fin     11 // * institutes,nor the agencies providing financial support for this *
 13 // * work  make  any representation or  warran     12 // * work  make  any representation or  warranty, express or implied, *
 14 // * regarding  this  software system or assum     13 // * regarding  this  software system or assume any liability for its *
 15 // * use.  Please see the license in the file  <<  14 // * use.                                                             *
 16 // * for the full disclaimer and the limitatio << 
 17 // *                                               15 // *                                                                  *
 18 // * This  code  implementation is the result  <<  16 // * This  code  implementation is the  intellectual property  of the *
 19 // * technical work of the GEANT4 collaboratio <<  17 // * GEANT4 collaboration.                                            *
 20 // * By using,  copying,  modifying or  distri <<  18 // * By copying,  distributing  or modifying the Program (or any work *
 21 // * any work based  on the software)  you  ag <<  19 // * based  on  the Program)  you indicate  your  acceptance of  this *
 22 // * use  in  resulting  scientific  publicati <<  20 // * statement, and all its terms.                                    *
 23 // * acceptance of all terms of the Geant4 Sof << 
 24 // *******************************************     21 // ********************************************************************
 25 //                                                 22 //
 26 // G4WeightWindowAlgorithm implementation      << 
 27 //                                                 23 //
 28 // Author: Michael Dressel (CERN), 2003        <<  24 // $Id: G4WeightWindowAlgorithm.cc,v 1.7 2003/08/19 15:16:56 dressel Exp $
                                                   >>  25 // GEANT4 tag $Name: geant4-07-01 $
                                                   >>  26 //
                                                   >>  27 // ----------------------------------------------------------------------
                                                   >>  28 // GEANT 4 class source file
                                                   >>  29 //
                                                   >>  30 // G4WeightWindowAlgorithm.cc
                                                   >>  31 //
 29 // -------------------------------------------     32 // ----------------------------------------------------------------------
 30 #include "G4WeightWindowAlgorithm.hh"              33 #include "G4WeightWindowAlgorithm.hh"
 31 #include "Randomize.hh"                            34 #include "Randomize.hh"
 32                                                    35 
                                                   >>  36 
 33 G4WeightWindowAlgorithm::                          37 G4WeightWindowAlgorithm::
 34 G4WeightWindowAlgorithm(G4double upperLimitFac <<  38 G4WeightWindowAlgorithm(G4double upperLimitFaktor,
 35                         G4double survivalFacto <<  39       G4double survivalFaktor,
 36                         G4int maxNumberOfSplit <<  40       G4int maxNumberOfSplits) :
 37   : fUpperLimitFactor(upperLimitFactor),       <<  41   fUpperLimitFaktor(upperLimitFaktor),
 38     fSurvivalFactor(survivalFactor),           <<  42   fSurvivalFaktor(survivalFaktor),
 39     fMaxNumberOfSplits(maxNumberOfSplits)      <<  43   fMaxNumberOfSplits(maxNumberOfSplits)
 40 {                                              <<  44 {}
 41 }                                              <<  45 
                                                   >>  46 G4WeightWindowAlgorithm::~G4WeightWindowAlgorithm()
                                                   >>  47 {}
                                                   >>  48 
 42                                                    49 
 43 G4WeightWindowAlgorithm::~G4WeightWindowAlgori << 
 44                                                    50 
 45 G4Nsplit_Weight                                    51 G4Nsplit_Weight 
 46 G4WeightWindowAlgorithm::Calculate(G4double in     52 G4WeightWindowAlgorithm::Calculate(G4double init_w,
 47                                    G4double lo <<  53            G4double lowerWeightBound) const {
 48 {                                              <<  54 
 49   G4double survivalWeight = lowerWeightBound * <<  55   G4double survivalWeight = lowerWeightBound * fSurvivalFaktor;
 50   G4double upperWeight = lowerWeightBound * fU <<  56   G4double upperWeight = lowerWeightBound * fUpperLimitFaktor;
 51                                                    57 
 52   // initialize return value for case weight i     58   // initialize return value for case weight in window
 53   //                                           << 
 54   G4Nsplit_Weight nw;                              59   G4Nsplit_Weight nw;
 55   nw.fN = 1;                                       60   nw.fN = 1;
 56   nw.fW = init_w;                                  61   nw.fW = init_w;
 57                                                    62 
 58   if (init_w > upperWeight)                    <<  63   if (init_w > upperWeight) {
 59   {                                            << 
 60     // splitting                                   64     // splitting
 61     //                                         <<  65 
 62     G4double temp_wi_ws = init_w/upperWeight;  <<  66     G4double wi_ws = init_w/survivalWeight;
 63     auto  split_i = static_cast<G4int>(temp_wi <<  67     G4int int_wi_ws = static_cast<int>(wi_ws);
 64     if(split_i != temp_wi_ws)  { ++split_i; }  << 
 65     G4double wi_ws = init_w/split_i;           << 
 66                                                    68 
 67     // values in case integer mode or in csae      69     // values in case integer mode or in csae of double
 68     // mode and the lower number of splits wil     70     // mode and the lower number of splits will be diced
 69     //                                         <<  71     nw.fN = int_wi_ws;
 70     nw.fN = split_i;                           <<  72     nw.fW = survivalWeight; 
 71     nw.fW = wi_ws;                             <<  73 
 72                                                <<  74     if (wi_ws <= fMaxNumberOfSplits) {
 73 //TB     if (wi_ws <= fMaxNumberOfSplits) {    <<  75       if (wi_ws > int_wi_ws) {
 74 //TB       if (wi_ws > int_wi_ws) {            <<  76   // double mode
 75 //TB         // double mode                    <<  77   G4double p2 =  wi_ws - int_wi_ws;
 76 //TB         G4double p2 =  wi_ws - int_wi_ws; <<  78   G4double r = G4UniformRand();
 77 //TB         G4double r = G4UniformRand();     <<  79   if (r<p2) {
 78 //TB         if (r<p2) {                       <<  80     nw.fN = int_wi_ws + 1;
 79 //TB           nw.fN = int_wi_ws + 1;          <<  81   }
 80 //TB         }                                 <<  82       }
 81 //TB       }                                   <<  83     }
 82 //TB     }                                     <<  84     else {
 83 //TB     else {                                <<  85       // fMaxNumberOfSplits < wi_ws
 84 //TB       // fMaxNumberOfSplits < wi_ws       <<  86       nw.fN = fMaxNumberOfSplits;
 85 //TB       nw.fN = fMaxNumberOfSplits;         <<  87       nw.fW = init_w/fMaxNumberOfSplits;
 86 //TB       nw.fW = init_w/fMaxNumberOfSplits;  <<  88     }
 87 //TB     }                                     <<  89 
 88                                                <<  90 
 89   }                                            <<  91   } else if (init_w < lowerWeightBound) {
 90   else if (init_w < lowerWeightBound)  // Russ <<  92     // Russian roulette
 91   {                                            << 
 92     G4double wi_ws = init_w/survivalWeight;        93     G4double wi_ws = init_w/survivalWeight;
 93     G4double p = std::max(wi_ws,1./fMaxNumberO     94     G4double p = std::max(wi_ws,1./fMaxNumberOfSplits);
 94     G4double r = G4UniformRand();                  95     G4double r = G4UniformRand();
 95     if (r<p)                                   <<  96     if (r<p){
 96     {                                          << 
 97       nw.fW = init_w/p;                            97       nw.fW = init_w/p;
 98       nw.fN = 1;                                   98       nw.fN = 1;
 99     }                                          <<  99     } else {
100     else                                       << 
101     {                                          << 
102       nw.fW = 0;                                  100       nw.fW = 0;
103       nw.fN = 0;                                  101       nw.fN = 0;
104     }                                             102     }
105   }                                               103   } 
106   // else do nothing                              104   // else do nothing
107                                                << 105   
                                                   >> 106   
108   return nw;                                      107   return nw;
109 }                                                 108 }
110                                                   109 
111                                                   110