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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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 | |
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27 | // |
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28 | // $Id: G4VDiscreteProcess.hh,v 1.9 2007/11/15 04:10:18 kurasige Exp $ |
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29 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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30 | // |
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31 | // |
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32 | // ------------------------------------------------------------ |
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33 | // GEANT 4 class header file |
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34 | // |
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35 | // History: first implementation, based on object model of |
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36 | // 2nd December 1995, G.Cosmo |
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37 | // add G4VDiscreteProcess(const G4String&) 24 Jul 1996, Hisaya kurashige |
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38 | // |
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39 | // Class Description |
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40 | // Abstract class which defines the public behavior of |
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41 | // discrete physics interactions. |
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42 | // |
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43 | // ------------------------------------------------------------ |
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44 | // New Physics scheme 18 Dec. 1996 H.Kurahige |
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45 | // ------------------------------------------------------------ |
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46 | // modified for new ParticleChange 12 Mar. 1998 H.Kurashige |
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47 | // Fixed a bug in PostStepGetPhysicalInteractionLength |
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48 | // 15 Apr. 2002 H.Kurashige |
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49 | // |
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50 | |
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51 | #ifndef G4VDiscreteProcess_h |
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52 | #define G4VDiscreteProcess_h 1 |
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53 | |
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54 | #include "globals.hh" |
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55 | #include "G4ios.hh" |
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56 | |
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57 | #include "G4VProcess.hh" |
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58 | |
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59 | class G4VDiscreteProcess : public G4VProcess |
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60 | { |
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61 | // Abstract class which defines the public behavior of |
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62 | // discrete physics interactions. |
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63 | public: |
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64 | |
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65 | G4VDiscreteProcess(const G4String& , |
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66 | G4ProcessType aType = fNotDefined ); |
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67 | G4VDiscreteProcess(G4VDiscreteProcess &); |
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68 | |
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69 | virtual ~G4VDiscreteProcess(); |
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70 | |
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71 | public :// with description |
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72 | virtual G4double PostStepGetPhysicalInteractionLength( |
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73 | const G4Track& track, |
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74 | G4double previousStepSize, |
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75 | G4ForceCondition* condition |
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76 | ); |
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77 | |
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78 | virtual G4VParticleChange* PostStepDoIt( |
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79 | const G4Track& , |
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80 | const G4Step& |
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81 | ); |
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82 | |
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83 | // no operation in AtRestDoIt and AlongStepDoIt |
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84 | virtual G4double AlongStepGetPhysicalInteractionLength( |
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85 | const G4Track&, |
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86 | G4double , |
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87 | G4double , |
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88 | G4double& , |
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89 | G4GPILSelection* |
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90 | ){ return -1.0; }; |
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91 | |
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92 | virtual G4double AtRestGetPhysicalInteractionLength( |
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93 | const G4Track& , |
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94 | G4ForceCondition* |
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95 | ) { return -1.0; }; |
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96 | |
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97 | // no operation in AtRestDoIt and AlongStepDoIt |
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98 | virtual G4VParticleChange* AtRestDoIt( |
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99 | const G4Track& , |
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100 | const G4Step& |
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101 | ) {return 0;}; |
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102 | |
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103 | virtual G4VParticleChange* AlongStepDoIt( |
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104 | const G4Track& , |
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105 | const G4Step& |
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106 | ) {return 0;}; |
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107 | |
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108 | protected:// with description |
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109 | virtual G4double GetMeanFreePath(const G4Track& aTrack, |
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110 | G4double previousStepSize, |
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111 | G4ForceCondition* condition |
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112 | )=0; |
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113 | // Calculates from the macroscopic cross section a mean |
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114 | // free path, the value is returned in units of distance. |
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115 | |
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116 | private: |
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117 | // hide default constructor and assignment operator as private |
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118 | G4VDiscreteProcess(); |
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119 | G4VDiscreteProcess & operator=(const G4VDiscreteProcess &right); |
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120 | |
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121 | }; |
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122 | |
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123 | // ----------------------------------------- |
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124 | // inlined function members implementation |
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125 | // ----------------------------------------- |
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126 | #include "G4Step.hh" |
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127 | #include "G4Track.hh" |
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128 | #include "G4MaterialTable.hh" |
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129 | #include "G4VParticleChange.hh" |
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130 | |
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131 | inline G4double G4VDiscreteProcess::PostStepGetPhysicalInteractionLength( |
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132 | const G4Track& track, |
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133 | G4double previousStepSize, |
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134 | G4ForceCondition* condition |
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135 | ) |
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136 | { |
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137 | if ( (previousStepSize < 0.0) || (theNumberOfInteractionLengthLeft<=0.0)) { |
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138 | // beggining of tracking (or just after DoIt of this process) |
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139 | ResetNumberOfInteractionLengthLeft(); |
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140 | } else if ( previousStepSize > 0.0) { |
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141 | // subtract NumberOfInteractionLengthLeft |
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142 | SubtractNumberOfInteractionLengthLeft(previousStepSize); |
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143 | } else { |
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144 | // zero step |
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145 | // DO NOTHING |
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146 | } |
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147 | |
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148 | // condition is set to "Not Forced" |
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149 | *condition = NotForced; |
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150 | |
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151 | // get mean free path |
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152 | currentInteractionLength = GetMeanFreePath(track, previousStepSize, condition); |
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153 | |
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154 | G4double value; |
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155 | if (currentInteractionLength <DBL_MAX) { |
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156 | value = theNumberOfInteractionLengthLeft * currentInteractionLength; |
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157 | } else { |
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158 | value = DBL_MAX; |
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159 | } |
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160 | #ifdef G4VERBOSE |
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161 | if (verboseLevel>1){ |
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162 | G4cout << "G4VDiscreteProcess::PostStepGetPhysicalInteractionLength "; |
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163 | G4cout << "[ " << GetProcessName() << "]" <<G4endl; |
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164 | track.GetDynamicParticle()->DumpInfo(); |
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165 | G4cout << " in Material " << track.GetMaterial()->GetName() <<G4endl; |
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166 | G4cout << "InteractionLength= " << value/cm <<"[cm] " <<G4endl; |
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167 | } |
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168 | #endif |
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169 | return value; |
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170 | } |
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171 | |
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172 | inline G4VParticleChange* G4VDiscreteProcess::PostStepDoIt( |
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173 | const G4Track& , |
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174 | const G4Step& |
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175 | ) |
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176 | { |
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177 | // clear NumberOfInteractionLengthLeft |
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178 | ClearNumberOfInteractionLengthLeft(); |
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179 | |
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180 | return pParticleChange; |
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181 | } |
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182 | |
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183 | |
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184 | #endif |
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185 | |
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186 | |
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187 | |
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