Geant4 Cross Reference

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Geant4/examples/extended/field/BlineTracer/src/G4BlineEquation.cc

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 26 /// \file field/BlineTracer/src/G4BlineEquation.cc
 27 /// \brief Implementation of the G4BlineEquation class
 28 //
 29 //
 30 //
 31 //
 32 // --------------------------------------------------------------------
 33 //
 34 // G4BlineEquation implementation
 35 //
 36 // --------------------------------------------------------------------
 37 // Author: Laurent Desorgher (desorgher@phim.unibe.ch)
 38 //         Created - 2003-10-06
 39 // --------------------------------------------------------------------
 40 
 41 #include "G4BlineEquation.hh"
 42 
 43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 44 
 45 G4BlineEquation::G4BlineEquation(G4MagneticField* magField) : G4Mag_EqRhs(magField) {}
 46 
 47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 48 
 49 void G4BlineEquation::EvaluateRhsGivenB(const G4double y[], const G4double B[3],
 50                                         G4double dydx[]) const
 51 {
 52   G4double Bmag = fDirection * std::sqrt(B[0] * B[0] + B[1] * B[1] + B[2] * B[2]);
 53   dydx[0] = B[0] / Bmag;
 54   dydx[1] = B[1] / Bmag;
 55   dydx[2] = B[2] / Bmag;
 56 
 57   dydx[3] = 0. * y[0];  // y[0] is used to remove warning
 58   dydx[4] = 0.;
 59   dydx[5] = 0.;
 60 }
 61 
 62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 63 
 64 void G4BlineEquation::SetBackwardDirectionOfIntegration(G4bool abool)
 65 {
 66   fBackward_direction = abool;
 67   fDirection = 1.;
 68   if (fBackward_direction) fDirection = -1.;
 69 }
 70