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 | // $Id: G4ErrorSurfaceTrajState.cc,v 1.6 2007/06/21 15:04:08 gunter Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03 $ |
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28 | // |
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29 | // ------------------------------------------------------------ |
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30 | // GEANT 4 class implementation file |
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31 | // ------------------------------------------------------------ |
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32 | // |
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33 | |
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34 | #include "G4ErrorSurfaceTrajState.hh" |
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35 | #include "G4ErrorPropagatorData.hh" |
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36 | |
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37 | #include "G4Field.hh" |
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38 | #include "G4FieldManager.hh" |
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39 | #include "G4TransportationManager.hh" |
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40 | |
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41 | #include "G4ErrorMatrix.hh" |
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42 | |
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43 | #include <iomanip> |
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44 | |
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45 | |
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46 | //------------------------------------------------------------------------ |
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47 | G4ErrorSurfaceTrajState:: |
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48 | G4ErrorSurfaceTrajState( const G4String& partType, const G4Point3D& pos, |
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49 | const G4Vector3D& mom, const G4Vector3D& vecU, |
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50 | const G4Vector3D& vecV, const G4ErrorTrajErr& errmat) |
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51 | : G4ErrorTrajState( partType, pos, mom, errmat ) |
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52 | { |
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53 | Init(); |
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54 | fTrajParam = G4ErrorSurfaceTrajParam( pos, mom, vecU, vecV ); |
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55 | } |
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56 | |
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57 | |
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58 | //------------------------------------------------------------------------ |
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59 | G4ErrorSurfaceTrajState:: |
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60 | G4ErrorSurfaceTrajState( const G4String& partType, const G4Point3D& pos, |
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61 | const G4Vector3D& mom, const G4Plane3D& plane, |
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62 | const G4ErrorTrajErr& errmat ) |
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63 | : G4ErrorTrajState( partType, pos, mom, errmat ) |
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64 | { |
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65 | Init(); |
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66 | fTrajParam = G4ErrorSurfaceTrajParam( pos, mom, plane ); |
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67 | |
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68 | } |
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69 | |
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70 | |
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71 | //------------------------------------------------------------------------ |
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72 | G4ErrorSurfaceTrajState:: |
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73 | G4ErrorSurfaceTrajState( G4ErrorFreeTrajState& tpSC, const G4Plane3D& plane ) |
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74 | : G4ErrorTrajState( tpSC.GetParticleType(), tpSC.GetPosition(), |
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75 | tpSC.GetMomentum() ) |
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76 | { |
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77 | // fParticleType = tpSC.GetParticleType(); |
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78 | // fPosition = tpSC.GetPosition(); |
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79 | // fMomentum = tpSC.GetMomentum(); |
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80 | fTrajParam = G4ErrorSurfaceTrajParam( fPosition, fMomentum, plane ); |
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81 | Init(); |
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82 | |
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83 | //----- Get the error matrix in SC coordinates |
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84 | BuildErrorMatrix( tpSC, GetVectorV(), GetVectorW() ); |
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85 | } |
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86 | |
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87 | |
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88 | //------------------------------------------------------------------------ |
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89 | G4ErrorSurfaceTrajState:: |
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90 | G4ErrorSurfaceTrajState( G4ErrorFreeTrajState& tpSC, const G4Vector3D& vecU, |
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91 | const G4Vector3D& vecV ) |
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92 | : G4ErrorTrajState( tpSC.GetParticleType(), tpSC.GetPosition(), |
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93 | tpSC.GetMomentum() ) |
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94 | { |
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95 | fTrajParam = G4ErrorSurfaceTrajParam( fPosition, fMomentum, vecU, vecV ); |
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96 | theTSType = G4eTS_OS; |
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97 | //----- Get the error matrix in SC coordinates |
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98 | BuildErrorMatrix( tpSC, vecU, vecV ); |
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99 | } |
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100 | |
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101 | |
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102 | //------------------------------------------------------------------------ |
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103 | void G4ErrorSurfaceTrajState:: |
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104 | BuildErrorMatrix( G4ErrorFreeTrajState& tpSC, const G4Vector3D&, |
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105 | const G4Vector3D& ) |
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106 | { |
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107 | G4double sclambda = tpSC.GetParameters().GetLambda(); |
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108 | G4double scphi = tpSC.GetParameters().GetPhi(); |
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109 | if( G4ErrorPropagatorData::GetErrorPropagatorData()->GetMode() == G4ErrorMode_PropBackwards ){ |
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110 | sclambda *= -1; |
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111 | scphi += CLHEP::pi; |
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112 | } |
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113 | G4double cosLambda = std::cos( sclambda ); |
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114 | G4double sinLambda = std::sin( sclambda ); |
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115 | G4double sinPhi = std::sin( scphi ); |
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116 | G4double cosPhi = std::cos( scphi ); |
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117 | |
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118 | #ifdef G4EVERBOSE |
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119 | if( iverbose >= 4) G4cout << " PM " << fMomentum.mag() << " pLambda " << sclambda << " pPhi " << scphi << G4endl; |
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120 | #endif |
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121 | |
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122 | G4ThreeVector vTN( cosLambda*cosPhi, cosLambda*sinPhi,sinLambda ); |
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123 | G4ThreeVector vUN( -sinPhi, cosPhi, 0. ); |
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124 | G4ThreeVector vVN( -vTN.z()*vUN.y(),vTN.z()*vUN.x(), cosLambda ); |
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125 | |
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126 | #ifdef G4EVERBOSE |
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127 | if( iverbose >= 4) G4cout << " SC2SD: vTN " << vTN << " vUN " << vUN << " vVN " << vVN << G4endl; |
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128 | #endif |
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129 | G4double UJ = vUN*GetVectorV(); |
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130 | G4double UK = vUN*GetVectorW(); |
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131 | G4double VJ = vVN*GetVectorV(); |
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132 | G4double VK = vVN*GetVectorW(); |
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133 | |
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134 | |
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135 | //--- Get transformation first |
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136 | G4ErrorMatrix transfM(5, 5, 0 ); |
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137 | //--- Get magnetic field |
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138 | const G4Field* field = G4TransportationManager::GetTransportationManager()->GetFieldManager()->GetDetectorField(); |
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139 | |
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140 | G4Vector3D vectorU = GetVectorV().cross( GetVectorW() ); |
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141 | |
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142 | #ifdef G4EVERBOSE |
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143 | if( iverbose >= 4) G4cout << "vectors " << vectorU << " " << GetVectorV() << " " << GetVectorW() << G4endl; |
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144 | #endif |
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145 | G4double T1R = 1. / ( vTN * vectorU ); |
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146 | |
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147 | if( fCharge != 0 && field ) { |
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148 | G4double pos[3]; pos[0] = fPosition.x()*cm; pos[1] = fPosition.y()*cm; pos[2] = fPosition.z()*cm; |
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149 | G4double Hd[3]; |
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150 | field->GetFieldValue( pos, Hd ); |
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151 | G4ThreeVector H = G4ThreeVector( Hd[0], Hd[1], Hd[2] ) / tesla *10.; //in kilogauus |
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152 | G4double magH = H.mag(); |
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153 | G4double invP = 1./(fMomentum.mag()/GeV); |
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154 | G4double magHM = magH * invP; |
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155 | if( magH != 0. ) { |
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156 | G4double magHM2 = fCharge / magH; |
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157 | G4double Q = -magHM * c_light/ (km/ns); |
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158 | #ifdef G4EVERBOSE |
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159 | if( iverbose >= 4) G4cout << GeV << " Q " << Q << " magHM " << magHM << " c_light/(km/ns) " << c_light/(km/ns) << G4endl; |
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160 | #endif |
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161 | |
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162 | G4double sinz = -H*vUN * magHM2; |
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163 | G4double cosz = H*vVN * magHM2; |
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164 | G4double T3R = Q * std::pow(T1R,3); |
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165 | G4double UI = vUN * vectorU; |
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166 | G4double VI = vVN * vectorU; |
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167 | #ifdef G4EVERBOSE |
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168 | if( iverbose >= 4) { |
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169 | G4cout << " T1R " << T1R << " T3R " << T3R << G4endl; |
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170 | G4cout << " UI " << UI << " VI " << VI << " vectorU " << vectorU << G4endl; |
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171 | G4cout << " UJ " << UJ << " VJ " << VJ << G4endl; |
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172 | G4cout << " UK " << UK << " VK " << VK << G4endl; |
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173 | } |
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174 | #endif |
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175 | |
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176 | transfM[1][3] = -UI*( VK*cosz-UK*sinz)*T3R; |
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177 | transfM[1][4] = -VI*( VK*cosz-UK*sinz)*T3R; |
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178 | transfM[2][3] = UI*( VJ*cosz-UJ*sinz)*T3R; |
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179 | transfM[2][4] = VI*( VJ*cosz-UJ*sinz)*T3R; |
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180 | } |
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181 | } |
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182 | |
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183 | G4double T2R = T1R * T1R; |
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184 | transfM[0][0] = 1.; |
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185 | transfM[1][1] = -UK*T2R; |
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186 | transfM[1][2] = VK*cosLambda*T2R; |
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187 | transfM[2][1] = UJ*T2R; |
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188 | transfM[2][2] = -VJ*cosLambda*T2R; |
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189 | transfM[3][3] = VK*T1R; |
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190 | transfM[3][4] = -UK*T1R; |
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191 | transfM[4][3] = -VJ*T1R; |
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192 | transfM[4][4] = UJ*T1R; |
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193 | |
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194 | #ifdef G4EVERBOSE |
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195 | if( iverbose >= 4) G4cout << " SC2SD transf matrix A= " << transfM << G4endl; |
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196 | #endif |
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197 | fError = G4ErrorTrajErr( tpSC.GetError().similarity( transfM ) ); |
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198 | |
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199 | #ifdef G4EVERBOSE |
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200 | if( iverbose >= 1) G4cout << "G4EP: error matrix SC2SD " << fError << G4endl; |
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201 | if( iverbose >= 4) G4cout << "G4ErrorSurfaceTrajState from SC " << *this << G4endl; |
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202 | #endif |
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203 | |
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204 | } |
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205 | |
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206 | |
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207 | //------------------------------------------------------------------------ |
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208 | void G4ErrorSurfaceTrajState::Init() |
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209 | { |
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210 | theTSType = G4eTS_OS; |
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211 | BuildCharge(); |
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212 | } |
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213 | |
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214 | |
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215 | //------------------------------------------------------------------------ |
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216 | void G4ErrorSurfaceTrajState::Dump( std::ostream& out ) const |
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217 | { |
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218 | out << *this; |
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219 | } |
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220 | |
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221 | |
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222 | //------------------------------------------------------------------------ |
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223 | std::ostream& operator<<(std::ostream& out, const G4ErrorSurfaceTrajState& ts) |
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224 | { |
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225 | out.setf(std::ios::fixed,std::ios::floatfield); |
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226 | |
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227 | ts.DumpPosMomError( out ); |
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228 | |
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229 | out << " G4ErrorSurfaceTrajState: Params: " << ts.fTrajParam << G4endl; |
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230 | return out; |
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231 | } |
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