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 | // |
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27 | // $Id: G4FieldTrack.hh,v 1.21 2006/11/13 18:24:35 gcosmo Exp $ |
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28 | // GEANT4 tag $Name: $ |
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29 | // |
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30 | // |
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31 | // class G4FieldTrack |
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32 | // |
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33 | // Class description: |
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34 | // |
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35 | // Data structure bringing together a magnetic track's state. |
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36 | // (position, momentum direction & modulus, energy, spin, ... ) |
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37 | // Uses/abilities: |
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38 | // - does not maintain any relationship between its data (eg energy/momentum). |
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39 | // - for use in Runge-Kutta solver (in passing it the values right now). |
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40 | |
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41 | // History |
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42 | // - First version: Oct 14, 1996 John Apostolakis |
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43 | // - Modified: Oct 24, 1996 JA: Added dist_on_curve, deleted constructor |
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44 | // Nov 5, 1998 JA: Added energy, momentum, TOF, spin & |
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45 | // several constructor, access, set methods |
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46 | // May 10, 2006 JA: Added charge, "default" constructor |
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47 | // ------------------------------------------------------------------- |
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48 | |
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49 | #ifndef G4FieldTrack_HH |
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50 | #define G4FieldTrack_HH |
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51 | |
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52 | #include "G4ThreeVector.hh" |
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53 | |
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54 | class G4FieldTrack |
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55 | { |
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56 | public: // with description |
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57 | |
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58 | G4FieldTrack( const G4ThreeVector& pPosition, |
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59 | G4double LaboratoryTimeOfFlight, |
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60 | const G4ThreeVector& pMomentumDirection, |
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61 | G4double kineticEnergy, |
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62 | G4double restMass_c2, |
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63 | G4double charge, |
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64 | const G4ThreeVector& pSpin, |
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65 | G4double magnetic_dipole_moment= 0.0, |
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66 | G4double curve_length= 0.0 |
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67 | ); |
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68 | G4FieldTrack( const G4FieldTrack& pFieldTrack ); |
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69 | G4FieldTrack( char ); // Almost default constructor |
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70 | |
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71 | ~G4FieldTrack(); |
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72 | // End of preferred Constructors / Destructor |
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73 | |
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74 | inline void |
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75 | UpdateState( const G4ThreeVector& pPosition, |
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76 | G4double LaboratoryTimeOfFlight, |
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77 | const G4ThreeVector& pMomentumDirection, |
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78 | G4double kineticEnergy); |
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79 | // Update four-vectors for space/time and momentum/energy |
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80 | // Also resets curve length. |
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81 | inline |
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82 | void UpdateFourMomentum( G4double kineticEnergy, |
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83 | const G4ThreeVector& momentumDirection ); |
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84 | // Update momentum (and direction), and kinetic energy |
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85 | |
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86 | void SetChargeAndMoments(G4double charge, |
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87 | G4double magnetic_dipole_moment= DBL_MAX, |
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88 | G4double electric_dipole_moment= DBL_MAX, |
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89 | G4double magnetic_charge=DBL_MAX ); |
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90 | // Sets all charges and moments |
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91 | |
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92 | G4FieldTrack( const G4ThreeVector& pPosition, |
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93 | const G4ThreeVector& pMomentumDirection, |
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94 | G4double curve_length, |
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95 | G4double kineticEnergy, |
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96 | const G4double restMass_c2, |
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97 | G4double velocity, |
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98 | G4double LaboratoryTimeOfFlight=0.0, |
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99 | G4double ProperTimeOfFlight=0.0, |
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100 | const G4ThreeVector* pSpin=0); |
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101 | // Older constructor |
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102 | // ---> Misses charge !!! |
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103 | |
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104 | inline G4FieldTrack& operator = ( const G4FieldTrack & rStVec ); |
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105 | // Assignment operator |
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106 | |
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107 | inline G4ThreeVector GetMomentum() const; |
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108 | inline G4ThreeVector GetPosition() const; |
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109 | inline const G4ThreeVector& GetMomentumDir() const; |
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110 | inline G4ThreeVector GetMomentumDirection() const; |
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111 | inline G4double GetCurveLength() const; |
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112 | // Distance along curve of point. |
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113 | |
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114 | inline G4ThreeVector GetSpin() const; |
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115 | inline G4double GetLabTimeOfFlight() const; |
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116 | inline G4double GetProperTimeOfFlight() const; |
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117 | inline G4double GetKineticEnergy() const; |
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118 | inline G4double GetCharge() const; |
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119 | // Accessors. |
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120 | |
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121 | inline void SetPosition(G4ThreeVector nPos); |
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122 | inline void SetMomentum(G4ThreeVector nMomDir); |
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123 | // Does change mom-dir too. |
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124 | |
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125 | inline void SetMomentumDir(G4ThreeVector nMomDir); |
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126 | // Does NOT change Momentum or Velocity Vector. |
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127 | |
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128 | inline void SetCurveLength(G4double nCurve_s); |
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129 | // Distance along curve. |
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130 | inline void SetKineticEnergy(G4double nEnergy); |
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131 | // Does not modify momentum. |
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132 | |
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133 | inline void SetSpin(G4ThreeVector nSpin); |
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134 | inline void SetLabTimeOfFlight(G4double nTOF); |
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135 | inline void SetProperTimeOfFlight(G4double nTOF); |
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136 | // Modifiers |
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137 | |
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138 | public: // without description |
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139 | |
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140 | inline G4FieldTrack& SetCurvePnt(const G4ThreeVector& pPosition, |
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141 | const G4ThreeVector& pMomentum, |
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142 | G4double s_curve ); |
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143 | inline void InitialiseSpin( const G4ThreeVector& Spin ); |
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144 | // Used to update / initialise the state |
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145 | |
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146 | enum { ncompSVEC = 12 }; |
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147 | // Needed and should be used only for RK integration driver |
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148 | |
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149 | inline void DumpToArray(G4double valArr[ncompSVEC]) const; |
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150 | inline void LoadFromArray(const G4double valArr[ncompSVEC], |
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151 | G4int noVarsIntegrated); |
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152 | friend std::ostream& |
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153 | operator<<( std::ostream& os, const G4FieldTrack& SixVec); |
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154 | |
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155 | private: |
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156 | |
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157 | G4double SixVector[6]; |
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158 | G4double fDistanceAlongCurve; // distance along curve of point |
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159 | G4double fKineticEnergy; |
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160 | G4double fRestMass_c2; |
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161 | G4double fLabTimeOfFlight; |
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162 | G4double fProperTimeOfFlight; |
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163 | G4ThreeVector fSpin; |
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164 | G4ThreeVector fMomentumDir; |
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165 | |
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166 | private: // Implementation detail -- daughter class |
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167 | |
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168 | class G4ChargeState // Charge & moments |
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169 | { |
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170 | public: // without description |
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171 | |
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172 | inline G4ChargeState(G4double charge, |
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173 | G4double magnetic_dipole_moment= 0.0, |
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174 | G4double electric_dipole_moment= 0.0, |
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175 | G4double magnetic_charge= 0.0); |
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176 | inline G4ChargeState( const G4ChargeState& right ); |
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177 | |
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178 | inline void SetCharge(G4double charge){ fCharge= charge; } |
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179 | |
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180 | // Revise the charge (in units of the positron charge) |
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181 | // do not change moments |
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182 | |
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183 | void SetChargeAndMoments(G4double charge, |
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184 | G4double magnetic_dipole_moment= DBL_MAX, |
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185 | G4double electric_dipole_moment= DBL_MAX, |
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186 | G4double magnetic_charge=DBL_MAX ); |
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187 | // Revise the charge and all moments |
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188 | |
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189 | G4double GetCharge() const { return fCharge; } |
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190 | G4double GetMagneticDipoleMoment() const { return fMagn_dipole; } |
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191 | G4double ElectricDipoleMoment() const { return fElec_dipole; } |
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192 | G4double MagneticCharge() const { return fMagneticCharge; } |
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193 | |
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194 | private: |
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195 | |
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196 | G4double fCharge; |
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197 | G4double fMagn_dipole; |
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198 | G4double fElec_dipole; |
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199 | G4double fMagneticCharge; // for magnetic monopole |
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200 | }; |
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201 | |
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202 | G4ChargeState fChargeState; |
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203 | |
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204 | public: // Access |
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205 | |
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206 | const G4ChargeState* GetChargeState() const { return &fChargeState; } |
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207 | }; |
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208 | |
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209 | #include "G4FieldTrack.icc" |
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210 | |
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211 | #endif /* End of ifndef G4FieldTrack_HH */ |
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