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24 // ******************************************* 21 // ********************************************************************
25 // 22 //
26 // G4Mag_UsualEqRhs << 23 //
>> 24 // $Id: G4Mag_UsualEqRhs.hh,v 1.6 2003/10/31 14:35:52 gcosmo Exp $
>> 25 // GEANT4 tag $Name: geant4-08-00-patch-01 $
>> 26 //
>> 27 //
>> 28 // class G4Mag_UsualEqRhs
27 // 29 //
28 // Class description: 30 // Class description:
29 // 31 //
30 // This is the standard right-hand side for eq 32 // This is the standard right-hand side for equation of motion.
31 // The only case another is required is when u 33 // The only case another is required is when using a moving reference
32 // frame ... or extending the class to include 34 // frame ... or extending the class to include additional Forces,
33 // eg an electric field 35 // eg an electric field
34 36
35 // Created: J.Apostolakis, CERN - 13.01.1997 << 37 // History:
>> 38 // - Created: J. Apostolakis, January 13th 1997.
36 // ------------------------------------------- 39 // --------------------------------------------------------------------
>> 40
37 #ifndef G4MAG_USUAL_EQRHS 41 #ifndef G4MAG_USUAL_EQRHS
38 #define G4MAG_USUAL_EQRHS 42 #define G4MAG_USUAL_EQRHS
39 43
40 #include "G4Mag_EqRhs.hh" 44 #include "G4Mag_EqRhs.hh"
41 #include "G4ChargeState.hh" <<
42 45
43 class G4MagneticField; 46 class G4MagneticField;
44 47
45 class G4Mag_UsualEqRhs : public G4Mag_EqRhs 48 class G4Mag_UsualEqRhs : public G4Mag_EqRhs
46 { 49 {
47 public: << 50 public: // with description
48 51
49 G4Mag_UsualEqRhs( G4MagneticField* MagFie 52 G4Mag_UsualEqRhs( G4MagneticField* MagField );
50 ~G4Mag_UsualEqRhs() override; << 53 ~G4Mag_UsualEqRhs();
51 // Constructor and destructor. No actio 54 // Constructor and destructor. No actions.
52 55
53 void EvaluateRhsGivenB( const G4double y[ 56 void EvaluateRhsGivenB( const G4double y[],
54 const G4double B[ 57 const G4double B[3],
55 G4double dy << 58 G4double dydx[] ) const;
56 // Given the value of the magnetic fiel 59 // Given the value of the magnetic field B, this function
57 // calculates the value of the derivati 60 // calculates the value of the derivative dydx.
58 61
59 void SetChargeMomentumMass( G4ChargeState << 62 virtual void SetChargeMomentumMass( G4double particleCharge, // in e+ units
60 G4double Mome << 63 G4double MomentumXc,
61 G4double mass << 64 G4double mass);
>> 65
>> 66 private:
>> 67
>> 68 G4double fInvCurrentMomentumXc; // This extra state enables us
>> 69 // to save a square root in a
>> 70 // critical method.
62 }; 71 };
63 72
64 #endif << 73 #endif /* G4MAG_USUAL_EQRHS */
65 74