Import Geant4 0.0.0 source tree

2016-06-01 15:25:35 +02:00
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+// This code implementation is the intellectual property of
+// the RD44 GEANT4 collaboration.
+//
+// By copying, distributing or modifying the Program (or any work
+// based on the Program) you indicate your acceptance of this statement,
+// and all its terms.
+//
+// $Id: G4ClassicalRK4.hh,v 2.3 1998/11/17 18:20:08 japost Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+//
+// J.Apostolakis, V.Grichine 30.1.97
+// changed: W.Wander <wwc@mit.edu> 12/09/97: Moved into MagErrorStepper
+
+#include "G4MagErrorStepper.hh"
+#include "G4ThreeVector.hh"
+
+class G4ClassicalRK4 : public G4MagErrorStepper 
+{
+  public:
+
+    G4ClassicalRK4(G4Mag_EqRhs *EqRhs, G4int numberOfVariables = 6) ;
+
+   ~G4ClassicalRK4() ;
+   
+           void StepWithEst( const G4double  yIn[],
+			     const G4double  dydx[],
+			     const G4double  h,
+			 	   G4double  yOut[],
+                                   G4double& alpha2,
+                                   G4double& beta2,
+			     const G4double B1[],
+			           G4double B2[]         ) ;
+
+  
+            G4int        IntegratorOrder() { return 4; };
+  
+
+   // A stepper that does not know about errors.
+   //  It is used by the MagErrorStepper stepper.
+   
+            void DumbStepper( const G4double  yIn[],
+			      const G4double  dydx[],
+			      const G4double  h,
+				    G4double  yOut[]) ;
+
+   //  Could make above G4SixPoint to keep tangents too ...?
+
+private:
+
+  G4int fNumberOfVariables ; // is set default to 6 in constructor
+
+  G4double *dydxm, *dydxt, *yt; // scratch space - not state 
+};