Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/geometry/magneticfield/src/G4Mag_UsualEqRhs.cc

Version: [ ReleaseNotes ] [ 1.0 ] [ 1.1 ] [ 2.0 ] [ 3.0 ] [ 3.1 ] [ 3.2 ] [ 4.0 ] [ 4.0.p1 ] [ 4.0.p2 ] [ 4.1 ] [ 4.1.p1 ] [ 5.0 ] [ 5.0.p1 ] [ 5.1 ] [ 5.1.p1 ] [ 5.2 ] [ 5.2.p1 ] [ 5.2.p2 ] [ 6.0 ] [ 6.0.p1 ] [ 6.1 ] [ 6.2 ] [ 6.2.p1 ] [ 6.2.p2 ] [ 7.0 ] [ 7.0.p1 ] [ 7.1 ] [ 7.1.p1 ] [ 8.0 ] [ 8.0.p1 ] [ 8.1 ] [ 8.1.p1 ] [ 8.1.p2 ] [ 8.2 ] [ 8.2.p1 ] [ 8.3 ] [ 8.3.p1 ] [ 8.3.p2 ] [ 9.0 ] [ 9.0.p1 ] [ 9.0.p2 ] [ 9.1 ] [ 9.1.p1 ] [ 9.1.p2 ] [ 9.1.p3 ] [ 9.2 ] [ 9.2.p1 ] [ 9.2.p2 ] [ 9.2.p3 ] [ 9.2.p4 ] [ 9.3 ] [ 9.3.p1 ] [ 9.3.p2 ] [ 9.4 ] [ 9.4.p1 ] [ 9.4.p2 ] [ 9.4.p3 ] [ 9.4.p4 ] [ 9.5 ] [ 9.5.p1 ] [ 9.5.p2 ] [ 9.6 ] [ 9.6.p1 ] [ 9.6.p2 ] [ 9.6.p3 ] [ 9.6.p4 ] [ 10.0 ] [ 10.0.p1 ] [ 10.0.p2 ] [ 10.0.p3 ] [ 10.0.p4 ] [ 10.1 ] [ 10.1.p1 ] [ 10.1.p2 ] [ 10.1.p3 ] [ 10.2 ] [ 10.2.p1 ] [ 10.2.p2 ] [ 10.2.p3 ] [ 10.3 ] [ 10.3.p1 ] [ 10.3.p2 ] [ 10.3.p3 ] [ 10.4 ] [ 10.4.p1 ] [ 10.4.p2 ] [ 10.4.p3 ] [ 10.5 ] [ 10.5.p1 ] [ 10.6 ] [ 10.6.p1 ] [ 10.6.p2 ] [ 10.6.p3 ] [ 10.7 ] [ 10.7.p1 ] [ 10.7.p2 ] [ 10.7.p3 ] [ 10.7.p4 ] [ 11.0 ] [ 11.0.p1 ] [ 11.0.p2 ] [ 11.0.p3, ] [ 11.0.p4 ] [ 11.1 ] [ 11.1.1 ] [ 11.1.2 ] [ 11.1.3 ] [ 11.2 ] [ 11.2.1 ] [ 11.2.2 ] [ 11.3.0 ]

Diff markup

Differences between /geometry/magneticfield/src/G4Mag_UsualEqRhs.cc (Version 11.3.0) and /geometry/magneticfield/src/G4Mag_UsualEqRhs.cc (Version 8.2.p1)


  1 //                                                  1 //
  2 // *******************************************      2 // ********************************************************************
  3 // * License and Disclaimer                         3 // * License and Disclaimer                                           *
  4 // *                                                4 // *                                                                  *
  5 // * The  Geant4 software  is  copyright of th      5 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
  6 // * the Geant4 Collaboration.  It is provided      6 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
  7 // * conditions of the Geant4 Software License      7 // * conditions of the Geant4 Software License,  included in the file *
  8 // * LICENSE and available at  http://cern.ch/      8 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
  9 // * include a list of copyright holders.           9 // * include a list of copyright holders.                             *
 10 // *                                               10 // *                                                                  *
 11 // * Neither the authors of this software syst     11 // * Neither the authors of this software system, nor their employing *
 12 // * institutes,nor the agencies providing fin     12 // * institutes,nor the agencies providing financial support for this *
 13 // * work  make  any representation or  warran     13 // * work  make  any representation or  warranty, express or implied, *
 14 // * regarding  this  software system or assum     14 // * regarding  this  software system or assume any liability for its *
 15 // * use.  Please see the license in the file      15 // * use.  Please see the license in the file  LICENSE  and URL above *
 16 // * for the full disclaimer and the limitatio     16 // * for the full disclaimer and the limitation of liability.         *
 17 // *                                               17 // *                                                                  *
 18 // * This  code  implementation is the result      18 // * This  code  implementation is the result of  the  scientific and *
 19 // * technical work of the GEANT4 collaboratio     19 // * technical work of the GEANT4 collaboration.                      *
 20 // * By using,  copying,  modifying or  distri     20 // * By using,  copying,  modifying or  distributing the software (or *
 21 // * any work based  on the software)  you  ag     21 // * any work based  on the software)  you  agree  to acknowledge its *
 22 // * use  in  resulting  scientific  publicati     22 // * use  in  resulting  scientific  publications,  and indicate your *
 23 // * acceptance of all terms of the Geant4 Sof     23 // * acceptance of all terms of the Geant4 Software license.          *
 24 // *******************************************     24 // ********************************************************************
 25 //                                                 25 //
 26 // G4Mag_UsualEqRhs implementation             << 
 27 //                                                 26 //
 28 // Created: J.Apostolakis, CERN - 13.01.1997   <<  27 // $Id: G4Mag_UsualEqRhs.cc,v 1.12 2006/06/29 18:24:42 gunter Exp $
                                                   >>  28 // GEANT4 tag $Name: geant4-08-01-patch-01 $
                                                   >>  29 //
                                                   >>  30 //
                                                   >>  31 //  This is the 'standard' right-hand side for the equation of motion
                                                   >>  32 //  of a charged particle in a magnetic field.
                                                   >>  33 //
                                                   >>  34 //  Initial version: J. Apostolakis, January 13th, 1997
                                                   >>  35 //
 29 // -------------------------------------------     36 // --------------------------------------------------------------------
 30                                                    37 
 31 #include "G4Mag_UsualEqRhs.hh"                     38 #include "G4Mag_UsualEqRhs.hh"
 32 #include "G4MagneticField.hh"                      39 #include "G4MagneticField.hh"
 33                                                    40 
 34 #include "globals.hh"                          << 
 35                                                << 
 36 G4Mag_UsualEqRhs::G4Mag_UsualEqRhs( G4Magnetic     41 G4Mag_UsualEqRhs::G4Mag_UsualEqRhs( G4MagneticField* MagField )
 37   : G4Mag_EqRhs( MagField )                    <<  42   : G4Mag_EqRhs( MagField ) {}
 38 {                                              << 
 39 }                                              << 
 40                                                    43 
 41 G4Mag_UsualEqRhs::~G4Mag_UsualEqRhs() = defaul <<  44 G4Mag_UsualEqRhs::~G4Mag_UsualEqRhs() {}
 42                                                    45 
 43 void                                               46 void
 44 G4Mag_UsualEqRhs::EvaluateRhsGivenB( const G4d     47 G4Mag_UsualEqRhs::EvaluateRhsGivenB( const G4double y[],
 45                                      const G4d <<  48                    const G4double B[3],
 46                                            G4d <<  49                    G4double dydx[] ) const
 47 {                                                  50 {
 48    G4double momentum_mag_square = y[3]*y[3] +      51    G4double momentum_mag_square = y[3]*y[3] + y[4]*y[4] + y[5]*y[5];
 49    G4double inv_momentum_magnitude = 1.0 / std     52    G4double inv_momentum_magnitude = 1.0 / std::sqrt( momentum_mag_square );
 50                                                    53 
 51    G4double cof = FCof()*inv_momentum_magnitud     54    G4double cof = FCof()*inv_momentum_magnitude;
 52                                                    55 
 53    dydx[0] = y[3]*inv_momentum_magnitude;          56    dydx[0] = y[3]*inv_momentum_magnitude;       //  (d/ds)x = Vx/V
 54    dydx[1] = y[4]*inv_momentum_magnitude;          57    dydx[1] = y[4]*inv_momentum_magnitude;       //  (d/ds)y = Vy/V
 55    dydx[2] = y[5]*inv_momentum_magnitude;          58    dydx[2] = y[5]*inv_momentum_magnitude;       //  (d/ds)z = Vz/V
 56                                                    59 
 57    dydx[3] = cof*(y[4]*B[2] - y[5]*B[1]) ;   /     60    dydx[3] = cof*(y[4]*B[2] - y[5]*B[1]) ;   // Ax = a*(Vy*Bz - Vz*By)
 58    dydx[4] = cof*(y[5]*B[0] - y[3]*B[2]) ;   /     61    dydx[4] = cof*(y[5]*B[0] - y[3]*B[2]) ;   // Ay = a*(Vz*Bx - Vx*Bz)
 59    dydx[5] = cof*(y[3]*B[1] - y[4]*B[0]) ;   /     62    dydx[5] = cof*(y[3]*B[1] - y[4]*B[0]) ;   // Az = a*(Vx*By - Vy*Bx)
 60                                                    63 
 61    return;                                     <<  64    return ;
 62 }                                                  65 }
 63                                                    66 
 64 void                                               67 void
 65 G4Mag_UsualEqRhs::SetChargeMomentumMass( G4Cha <<  68 G4Mag_UsualEqRhs::
 66                                          G4dou <<  69  SetChargeMomentumMass( G4double particleCharge, // in e+ units
 67                                          G4dou <<  70                        G4double MomentumXc,
                                                   >>  71                        G4double mass)
 68                                                    72 
 69 {                                                  73 {
                                                   >>  74    fInvCurrentMomentumXc= 1.0 / MomentumXc;
 70    G4Mag_EqRhs::SetChargeMomentumMass( particl     75    G4Mag_EqRhs::SetChargeMomentumMass( particleCharge, MomentumXc, mass);
 71 }                                                  76 }
 72                                                    77