1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // neutron_hp -- source file |
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27 | // J.P. Wellisch, Nov-1996 |
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28 | // A prototype of the low energy neutron transport model. |
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29 | // |
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30 | // 070523 bug fix for G4FPE_DEBUG on by A. Howard ( and T. Koi) |
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31 | // 080808 bug fix in Sample() and GetXsec() by T. Koi |
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32 | // |
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33 | #include "G4NeutronHPVector.hh" |
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34 | |
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35 | // if the ranges do not match, constant extrapolation is used. |
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36 | G4NeutronHPVector & operator + (G4NeutronHPVector & left, G4NeutronHPVector & right) |
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37 | { |
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38 | G4NeutronHPVector * result = new G4NeutronHPVector; |
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39 | G4int j=0; |
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40 | G4double x; |
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41 | G4double y; |
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42 | G4int running = 0; |
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43 | for(G4int i=0; i<left.GetVectorLength(); i++) |
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44 | { |
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45 | while(j<right.GetVectorLength()) |
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46 | { |
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47 | if(right.GetX(j)<left.GetX(i)*1.001) |
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48 | { |
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49 | x = right.GetX(j); |
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50 | y = right.GetY(j)+left.GetY(x); |
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51 | result->SetData(running++, x, y); |
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52 | j++; |
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53 | } |
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54 | //else if(std::abs((right.GetX(j)-left.GetX(i))/(left.GetX(i)+right.GetX(j)))>0.001) |
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55 | else if( left.GetX(i)+right.GetX(j) == 0 |
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56 | || std::abs((right.GetX(j)-left.GetX(i))/(left.GetX(i)+right.GetX(j))) > 0.001 ) |
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57 | { |
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58 | x = left.GetX(i); |
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59 | y = left.GetY(i)+right.GetY(x); |
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60 | result->SetData(running++, x, y); |
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61 | break; |
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62 | } |
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63 | else |
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64 | { |
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65 | break; |
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66 | } |
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67 | } |
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68 | if(j==right.GetVectorLength()) |
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69 | { |
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70 | x = left.GetX(i); |
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71 | y = left.GetY(i)+right.GetY(x); |
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72 | result->SetData(running++, x, y); |
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73 | } |
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74 | } |
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75 | result->ThinOut(0.02); |
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76 | return *result; |
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77 | } |
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78 | |
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79 | G4NeutronHPVector::G4NeutronHPVector() |
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80 | { |
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81 | theData = new G4NeutronHPDataPoint[20]; |
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82 | nPoints=20; |
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83 | nEntries=0; |
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84 | Verbose=0; |
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85 | theIntegral=0; |
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86 | totalIntegral=-1; |
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87 | isFreed = 0; |
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88 | maxValue = -DBL_MAX; |
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89 | the15percentBorderCash = -DBL_MAX; |
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90 | the50percentBorderCash = -DBL_MAX; |
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91 | label = -DBL_MAX; |
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92 | |
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93 | } |
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94 | |
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95 | G4NeutronHPVector::G4NeutronHPVector(G4int n) |
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96 | { |
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97 | nPoints=std::max(n, 20); |
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98 | theData = new G4NeutronHPDataPoint[nPoints]; |
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99 | nEntries=0; |
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100 | Verbose=0; |
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101 | theIntegral=0; |
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102 | totalIntegral=-1; |
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103 | isFreed = 0; |
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104 | maxValue = -DBL_MAX; |
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105 | the15percentBorderCash = -DBL_MAX; |
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106 | the50percentBorderCash = -DBL_MAX; |
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107 | } |
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108 | |
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109 | G4NeutronHPVector::~G4NeutronHPVector() |
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110 | { |
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111 | // if(Verbose==1)G4cout <<"G4NeutronHPVector::~G4NeutronHPVector"<<G4endl; |
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112 | delete [] theData; |
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113 | // if(Verbose==1)G4cout <<"Vector: delete theData"<<G4endl; |
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114 | delete [] theIntegral; |
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115 | // if(Verbose==1)G4cout <<"Vector: delete theIntegral"<<G4endl; |
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116 | isFreed = 1; |
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117 | } |
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118 | |
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119 | G4NeutronHPVector & G4NeutronHPVector:: |
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120 | operator = (const G4NeutronHPVector & right) |
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121 | { |
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122 | if(&right == this) return *this; |
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123 | |
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124 | G4int i; |
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125 | |
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126 | totalIntegral = right.totalIntegral; |
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127 | if(right.theIntegral!=0) theIntegral = new G4double[right.nEntries]; |
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128 | for(i=0; i<right.nEntries; i++) |
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129 | { |
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130 | SetPoint(i, right.GetPoint(i)); // copy theData |
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131 | if(right.theIntegral!=0) theIntegral[i] = right.theIntegral[i]; |
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132 | } |
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133 | theManager = right.theManager; |
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134 | label = right.label; |
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135 | |
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136 | Verbose = right.Verbose; |
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137 | the15percentBorderCash = right.the15percentBorderCash; |
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138 | the50percentBorderCash = right.the50percentBorderCash; |
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139 | theHash = right.theHash; |
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140 | return *this; |
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141 | } |
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142 | |
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143 | |
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144 | G4double G4NeutronHPVector::GetXsec(G4double e) |
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145 | { |
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146 | if(nEntries == 0) return 0; |
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147 | if(!theHash.Prepared()) Hash(); |
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148 | G4int min = theHash.GetMinIndex(e); |
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149 | G4int i; |
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150 | for(i=min ; i<nEntries; i++) |
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151 | { |
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152 | //if(theData[i].GetX()>e) break; |
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153 | if(theData[i].GetX() >= e) break; |
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154 | } |
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155 | G4int low = i-1; |
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156 | G4int high = i; |
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157 | if(i==0) |
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158 | { |
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159 | low = 0; |
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160 | high = 1; |
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161 | } |
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162 | else if(i==nEntries) |
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163 | { |
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164 | low = nEntries-2; |
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165 | high = nEntries-1; |
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166 | } |
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167 | G4double y; |
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168 | if(e<theData[nEntries-1].GetX()) |
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169 | { |
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170 | // Protect against doubled-up x values |
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171 | //if( (theData[high].GetX()-theData[low].GetX())/theData[high].GetX() < 0.000001) |
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172 | if ( theData[high].GetX() !=0 |
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173 | //080808 TKDB |
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174 | //&&( theData[high].GetX()-theData[low].GetX())/theData[high].GetX() < 0.000001) |
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175 | &&( std::abs( (theData[high].GetX()-theData[low].GetX())/theData[high].GetX() ) < 0.000001 ) ) |
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176 | { |
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177 | y = theData[low].GetY(); |
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178 | } |
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179 | else |
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180 | { |
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181 | y = theInt.Interpolate(theManager.GetScheme(high), e, |
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182 | theData[low].GetX(), theData[high].GetX(), |
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183 | theData[low].GetY(), theData[high].GetY()); |
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184 | } |
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185 | } |
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186 | else |
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187 | { |
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188 | y=theData[nEntries-1].GetY(); |
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189 | } |
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190 | return y; |
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191 | } |
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192 | |
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193 | void G4NeutronHPVector::Dump() |
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194 | { |
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195 | G4cout << nEntries<<G4endl; |
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196 | for(G4int i=0; i<nEntries; i++) |
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197 | { |
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198 | G4cout << theData[i].GetX()<<" "; |
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199 | G4cout << theData[i].GetY()<<" "; |
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200 | // if (i!=1&&i==5*(i/5)) G4cout << G4endl; |
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201 | G4cout << G4endl; |
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202 | } |
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203 | G4cout << G4endl; |
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204 | } |
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205 | |
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206 | void G4NeutronHPVector::Check(G4int i) |
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207 | { |
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208 | if(i>nEntries) throw G4HadronicException(__FILE__, __LINE__, "Skipped some index numbers in G4NeutronHPVector"); |
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209 | if(i==nPoints) |
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210 | { |
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211 | nPoints = static_cast<G4int>(1.2*nPoints); |
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212 | G4NeutronHPDataPoint * buff = new G4NeutronHPDataPoint[nPoints]; |
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213 | for (G4int j=0; j<nEntries; j++) buff[j] = theData[j]; |
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214 | delete [] theData; |
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215 | theData = buff; |
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216 | } |
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217 | if(i==nEntries) nEntries=i+1; |
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218 | } |
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219 | |
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220 | void G4NeutronHPVector:: |
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221 | Merge(G4InterpolationScheme aScheme, G4double aValue, |
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222 | G4NeutronHPVector * active, G4NeutronHPVector * passive) |
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223 | { |
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224 | // interpolate between labels according to aScheme, cut at aValue, |
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225 | // continue in unknown areas by substraction of the last difference. |
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226 | |
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227 | CleanUp(); |
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228 | G4int s = 0, n=0, m=0; |
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229 | G4NeutronHPVector * tmp; |
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230 | G4int a = s, p = n, t; |
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231 | while ( a<active->GetVectorLength() ) |
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232 | { |
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233 | if(active->GetEnergy(a) <= passive->GetEnergy(p)) |
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234 | { |
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235 | G4double xa = active->GetEnergy(a); |
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236 | G4double yy = theInt.Interpolate(aScheme, aValue, active->GetLabel(), passive->GetLabel(), |
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237 | active->GetXsec(a), passive->GetXsec(xa)); |
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238 | SetData(m, xa, yy); |
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239 | theManager.AppendScheme(m, active->GetScheme(a)); |
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240 | m++; |
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241 | a++; |
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242 | G4double xp = passive->GetEnergy(p); |
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243 | //if( std::abs(std::abs(xp-xa)/xa)<0.0000001&&a<active->GetVectorLength() ) |
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244 | if ( xa != 0 |
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245 | && std::abs(std::abs(xp-xa)/xa) < 0.0000001 |
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246 | && a < active->GetVectorLength() ) |
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247 | { |
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248 | p++; |
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249 | tmp = active; t=a; |
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250 | active = passive; a=p; |
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251 | passive = tmp; p=t; |
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252 | } |
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253 | } else { |
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254 | tmp = active; t=a; |
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255 | active = passive; a=p; |
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256 | passive = tmp; p=t; |
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257 | } |
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258 | } |
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259 | |
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260 | G4double deltaX = passive->GetXsec(GetEnergy(m-1)) - GetXsec(m-1); |
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261 | while (p!=passive->GetVectorLength()&&passive->GetEnergy(p)<=aValue) |
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262 | { |
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263 | G4double anX; |
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264 | anX = passive->GetXsec(p)-deltaX; |
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265 | if(anX>0) |
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266 | { |
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267 | //if(std::abs(GetEnergy(m-1)-passive->GetEnergy(p))/passive->GetEnergy(p)>0.0000001) |
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268 | if ( passive->GetEnergy(p) == 0 |
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269 | || std::abs(GetEnergy(m-1)-passive->GetEnergy(p))/passive->GetEnergy(p) > 0.0000001 ) |
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270 | { |
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271 | SetData(m, passive->GetEnergy(p), anX); |
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272 | theManager.AppendScheme(m++, passive->GetScheme(p)); |
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273 | } |
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274 | } |
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275 | p++; |
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276 | } |
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277 | // Rebuild the Hash; |
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278 | if(theHash.Prepared()) |
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279 | { |
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280 | ReHash(); |
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281 | } |
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282 | } |
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283 | |
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284 | void G4NeutronHPVector::ThinOut(G4double precision) |
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285 | { |
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286 | // anything in there? |
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287 | if(GetVectorLength()==0) return; |
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288 | // make the new vector |
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289 | G4NeutronHPDataPoint * aBuff = new G4NeutronHPDataPoint[nPoints]; |
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290 | G4double x, x1, x2, y, y1, y2; |
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291 | G4int count = 0, current = 2, start = 1; |
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292 | |
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293 | // First element always goes and is never tested. |
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294 | aBuff[0] = theData[0]; |
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295 | |
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296 | // Find the rest |
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297 | while(current < GetVectorLength()) |
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298 | { |
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299 | x1=aBuff[count].GetX(); |
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300 | y1=aBuff[count].GetY(); |
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301 | x2=theData[current].GetX(); |
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302 | y2=theData[current].GetY(); |
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303 | for(G4int j=start; j<current; j++) |
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304 | { |
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305 | x = theData[j].GetX(); |
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306 | if(x1-x2 == 0) y = (y2+y1)/2.; |
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307 | else y = theInt.Lin(x, x1, x2, y1, y2); |
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308 | if (std::abs(y-theData[j].GetY())>precision*y) |
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309 | { |
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310 | aBuff[++count] = theData[current-1]; // for this one, everything was fine |
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311 | start = current; // the next candidate |
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312 | break; |
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313 | } |
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314 | } |
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315 | current++ ; |
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316 | } |
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317 | // The last one also always goes, and is never tested. |
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318 | aBuff[++count] = theData[GetVectorLength()-1]; |
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319 | delete [] theData; |
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320 | theData = aBuff; |
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321 | nEntries = count+1; |
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322 | |
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323 | // Rebuild the Hash; |
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324 | if(theHash.Prepared()) |
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325 | { |
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326 | ReHash(); |
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327 | } |
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328 | } |
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329 | |
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330 | G4bool G4NeutronHPVector::IsBlocked(G4double aX) |
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331 | { |
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332 | G4bool result = false; |
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333 | std::vector<G4double>::iterator i; |
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334 | for(i=theBlocked.begin(); i!=theBlocked.end(); i++) |
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335 | { |
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336 | G4double aBlock = *i; |
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337 | if(std::abs(aX-aBlock) < 0.1*MeV) |
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338 | { |
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339 | result = true; |
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340 | theBlocked.erase(i); |
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341 | break; |
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342 | } |
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343 | } |
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344 | return result; |
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345 | } |
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346 | |
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347 | G4double G4NeutronHPVector::Sample() // Samples X according to distribution Y |
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348 | { |
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349 | G4double result; |
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350 | G4int j; |
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351 | for(j=0; j<GetVectorLength(); j++) |
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352 | { |
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353 | if(GetY(j)<0) SetY(j, 0); |
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354 | } |
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355 | |
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356 | if(theBuffered.size() !=0 && G4UniformRand()<0.5) |
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357 | { |
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358 | result = theBuffered[0]; |
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359 | theBuffered.erase(theBuffered.begin()); |
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360 | if(result < GetX(GetVectorLength()-1) ) return result; |
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361 | } |
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362 | if(GetVectorLength()==1) |
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363 | { |
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364 | result = theData[0].GetX(); |
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365 | } |
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366 | else |
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367 | { |
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368 | if(theIntegral==0) { IntegrateAndNormalise(); } |
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369 | do |
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370 | { |
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371 | //080808 |
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372 | /* |
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373 | G4double rand; |
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374 | G4double value, test, baseline; |
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375 | baseline = theData[GetVectorLength()-1].GetX()-theData[0].GetX(); |
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376 | do |
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377 | { |
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378 | value = baseline*G4UniformRand(); |
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379 | value += theData[0].GetX(); |
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380 | test = GetY(value)/maxValue; |
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381 | rand = G4UniformRand(); |
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382 | } |
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383 | //while(test<rand); |
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384 | while( test < rand && test > 0 ); |
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385 | result = value; |
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386 | */ |
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387 | G4double rand; |
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388 | G4double value, test; |
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389 | do |
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390 | { |
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391 | rand = G4UniformRand(); |
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392 | G4int ibin = -1; |
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393 | for ( G4int i = 0 ; i < GetVectorLength() ; i++ ) |
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394 | { |
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395 | if ( rand < theIntegral[i] ) |
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396 | { |
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397 | ibin = i; |
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398 | break; |
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399 | } |
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400 | } |
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401 | if ( ibin < 0 ) G4cout << "TKDB 080807 " << rand << G4endl; |
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402 | // result |
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403 | rand = G4UniformRand(); |
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404 | G4double x1, x2; |
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405 | if ( ibin == 0 ) |
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406 | { |
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407 | x1 = theData[ ibin ].GetX(); |
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408 | value = x1; |
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409 | break; |
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410 | } |
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411 | else |
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412 | { |
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413 | x1 = theData[ ibin-1 ].GetX(); |
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414 | } |
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415 | |
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416 | x2 = theData[ ibin ].GetX(); |
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417 | value = rand * ( x2 - x1 ) + x1; |
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418 | test = GetY ( value ) / std::max ( GetY( ibin-1 ) , GetY ( ibin ) ); |
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419 | } |
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420 | while ( G4UniformRand() > test ); |
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421 | result = value; |
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422 | //080807 |
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423 | } |
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424 | while(IsBlocked(result)); |
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425 | } |
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426 | return result; |
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427 | } |
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428 | |
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429 | G4double G4NeutronHPVector::Get15percentBorder() |
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430 | { |
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431 | if(the15percentBorderCash>-DBL_MAX/2.) return the15percentBorderCash; |
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432 | G4double result; |
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433 | if(GetVectorLength()==1) |
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434 | { |
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435 | result = theData[0].GetX(); |
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436 | the15percentBorderCash = result; |
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437 | } |
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438 | else |
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439 | { |
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440 | if(theIntegral==0) { IntegrateAndNormalise(); } |
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441 | G4int i; |
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442 | result = theData[GetVectorLength()-1].GetX(); |
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443 | for(i=0;i<GetVectorLength();i++) |
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444 | { |
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445 | if(theIntegral[i]/theIntegral[GetVectorLength()-1]>0.15) |
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446 | { |
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447 | result = theData[std::min(i+1, GetVectorLength()-1)].GetX(); |
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448 | the15percentBorderCash = result; |
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449 | break; |
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450 | } |
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451 | } |
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452 | the15percentBorderCash = result; |
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453 | } |
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454 | return result; |
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455 | } |
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456 | |
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457 | G4double G4NeutronHPVector::Get50percentBorder() |
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458 | { |
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459 | if(the50percentBorderCash>-DBL_MAX/2.) return the50percentBorderCash; |
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460 | G4double result; |
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461 | if(GetVectorLength()==1) |
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462 | { |
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463 | result = theData[0].GetX(); |
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464 | the50percentBorderCash = result; |
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465 | } |
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466 | else |
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467 | { |
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468 | if(theIntegral==0) { IntegrateAndNormalise(); } |
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469 | G4int i; |
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470 | G4double x = 0.5; |
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471 | result = theData[GetVectorLength()-1].GetX(); |
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472 | for(i=0;i<GetVectorLength();i++) |
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473 | { |
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474 | if(theIntegral[i]/theIntegral[GetVectorLength()-1]>x) |
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475 | { |
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476 | G4int it; |
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477 | it = i; |
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478 | if(it == GetVectorLength()-1) |
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479 | { |
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480 | result = theData[GetVectorLength()-1].GetX(); |
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481 | } |
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482 | else |
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483 | { |
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484 | G4double x1, x2, y1, y2; |
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485 | x1 = theIntegral[i-1]/theIntegral[GetVectorLength()-1]; |
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486 | x2 = theIntegral[i]/theIntegral[GetVectorLength()-1]; |
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487 | y1 = theData[i-1].GetX(); |
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488 | y2 = theData[i].GetX(); |
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489 | result = theLin.Lin(x, x1, x2, y1, y2); |
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490 | } |
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491 | the50percentBorderCash = result; |
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492 | break; |
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493 | } |
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494 | } |
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495 | the50percentBorderCash = result; |
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496 | } |
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497 | return result; |
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498 | } |
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