Import Geant4 0.0.0 source tree

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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: G4EquationOfMotion.hh,v 2.4 1998/11/12 19:48:09 japost Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+// Abstract Base Class for:
+//
+//   The right hand size of the equation of motion of a particle in a field.
+//
+#ifndef G4_EquationOfMotion_DEF
+#define G4_EquationOfMotion_DEF
+#include  "globals.hh"
+
+#include  "G4Field.hh"    // class G4Field;  // should be enough
+
+class G4EquationOfMotion 
+{
+  public:
+     G4EquationOfMotion( G4Field *Field );
+     virtual ~G4EquationOfMotion();
+
+     //  Given the value of the  field "B", this function 
+     //   calculates the value of the derivative dydx.
+     //  --------------------------------------------------------
+     //  This is the _only_ function a subclass must define.
+     //  The other two functions use Rhs_givenB.
+     //
+     virtual void EvaluateRhsGivenB( const  G4double y[],
+			      const  G4double B[3],
+				     G4double dydx[] ) const = 0;
+
+     //  Set the charge, momentum and mass of the current particle
+     //   --> used to set the equation's coefficients ...
+     virtual void  SetChargeMomentumMass( 
+				 const G4double particleCharge, // in e+ units
+			         const G4double MomentumXc,
+			         const G4double MassXc2) = 0;
+     
+
+     //  This calculates the value of the derivative dydx at y.
+     //  It is the usual enquiry function.
+     //  ---------------------------
+     //  (It is not virtual, but calls the virtual function above.)
+     //
+     void RightHandSide( const  G4double y[],
+				G4double dydx[]   ) const;
+
+     //  Same as RHS above, but also returns the value of B.
+     //
+     //   Should be made the new default ? after putting dydx & B in a class
+     //
+     void EvaluateRhsReturnB( const  G4double y[],
+			      G4double dydx[],
+			      G4double Field[]  ) const;
+
+     //  Obtain only the field - the stepper assumes it is pure Magnetic
+     //     Not protected, because G4RKG3_Stepper uses it directly
+     
+     void GetFieldValue( const  G4double Point[3],
+			        G4double Field[] )  const
+			   {  itsField-> GetFieldValue( Point, Field ); }
+
+     G4Field* GetFieldObj();
+     void     SetFieldObj(G4Field* pField);
+
+  //------------------------------------------------------------------------
+  //public:
+  //  virtual void doNothing(); // To help compiler with their virtual tables.
+
+  private:
+
+     G4Field *itsField;
+
+};
+
+#include "G4EquationOfMotion.icc"
+
+#endif /* G4_EquationOfMotion_DEF */