Gabriele Cosmo
84 lines
3.7 KiB
C++
84 lines
3.7 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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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 *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4ElectroMagneticField.hh,v 1.10 2004/09/01 10:00:10 japost Exp $
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// GEANT4 tag $Name: geant4-08-00 $
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//
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//
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// class G4ElectroMagneticField
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//
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// Class description:
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//
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// A full Electromagnetic field, containing both electric and magnetic fields.
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// It is an abstract class, and a derived type of this field must be
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// created by the user to describe his/her field configuration.
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// We have established a convention for the electromagnetic field components:
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// In the GetValue method, the return values of Bfield will have
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// the following meaning
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// - Components 0, 1 and 2 are the Magnetic Field (x, y, z respectively);
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// - Components 3, 4 and 5 are the Electric field (x, y, z respectively).
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//
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// Note 1: one or the other field could optional, depending on the Equation
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// Note 2: such a convention is required between any field and its
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// corresponding equation of motion.
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//
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// History:
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// - Created: J. Apostolakis, November 12th, 1998
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// - Modified:
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// V. Grichine 8 Nov 2001: Extended "Point" arg to [4] array to add time
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// G. Cosmo 2 Apr 2003: Reorgansised, moved inline methods to .cc
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// J. Apostolakis 5 Nov 2003: Derive directly from G4Field
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// J. Apostolakis 31 Aug 2004: Information on convention for components
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// -------------------------------------------------------------------
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#ifndef G4ELECTROMAGNETIC_FIELD_DEF
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#define G4ELECTROMAGNETIC_FIELD_DEF
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#include "G4Field.hh"
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class G4ElectroMagneticField : public G4Field
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{
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public: // with description
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G4ElectroMagneticField();
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virtual ~G4ElectroMagneticField();
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G4ElectroMagneticField(const G4ElectroMagneticField &r);
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G4ElectroMagneticField& operator = (const G4ElectroMagneticField &p);
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// Copy constructor & assignment operators.
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virtual void GetFieldValue(const G4double Point[4],
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G4double *Bfield ) const = 0;
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// Return as Bfield[0], [1], [2] the magnetic field x, y & z components
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// and as Bfield[3], [4], [5] the electric field x, y & z components
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virtual G4bool DoesFieldChangeEnergy() const = 0;
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// For field with an electric component this should be true
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// For pure magnetic field this should be false
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// Alternative: default safe implementation { return true; }
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};
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#endif /* G4ELECTROMAGNETIC_FIELD_DEF */
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