Gabriele Cosmo
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4ClassicalRK4.hh,v 1.1.10.1 1999/12/07 20:47:58 gunter Exp $
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// GEANT4 tag $Name: geant4-01-00 $
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//
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//
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// J.Apostolakis, V.Grichine 30.1.97
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// changed: W.Wander <wwc@mit.edu> 12/09/97: Moved into MagErrorStepper
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#include "G4MagErrorStepper.hh"
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#include "G4ThreeVector.hh"
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class G4ClassicalRK4 : public G4MagErrorStepper
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{
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public:
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G4ClassicalRK4(G4Mag_EqRhs *EqRhs, G4int numberOfVariables = 6) ;
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~G4ClassicalRK4() ;
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void StepWithEst( const G4double yIn[],
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const G4double dydx[],
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const G4double h,
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G4double yOut[],
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G4double& alpha2,
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G4double& beta2,
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const G4double B1[],
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G4double B2[] ) ;
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G4int IntegratorOrder() { return 4; };
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// A stepper that does not know about errors.
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// It is used by the MagErrorStepper stepper.
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void DumbStepper( const G4double yIn[],
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const G4double dydx[],
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const G4double h,
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G4double yOut[]) ;
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// Could make above G4SixPoint to keep tangents too ...?
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private:
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G4int fNumberOfVariables ; // is set default to 6 in constructor
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G4double *dydxm, *dydxt, *yt; // scratch space - not state
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};
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