Field.h

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#ifndef SimG4Core_Field_H
#define SimG4Core_Field_H

#include "G4MagneticField.hh"

class MagneticField;

namespace sim {
   class Field : public G4MagneticField
   {
      public:
     Field(const MagneticField * f, double d);
     virtual ~Field();
     virtual void GetFieldValue(const G4double p[4], G4double b[3]) const;

      private:
     const MagneticField* theCMSMagneticField;
         double theDelta;

         mutable double oldx[3];
         mutable double oldb[3];
   };
};
#endif