BDSFieldMagMultipole.hh

/* 
Beam Delivery Simulation (BDSIM) Copyright (C) Royal Holloway, 
University of London 2001 - 2022.
 
This file is part of BDSIM.
 
BDSIM is free software: you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published 
by the Free Software Foundation version 3 of the License.
 
BDSIM is distributed in the hope that it will be useful, but 
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with BDSIM.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef BDSFIELDMAGMULTIPOLE_H
#define BDSFIELDMAGMULTIPOLE_H
 
#include "BDSFieldMag.hh"
 
#include "globals.hh" // geant4 types / globals
#include "G4ThreeVector.hh"
 
#include <vector>
 
class BDSMagnetStrength;
 
class BDSFieldMagMultipole: public BDSFieldMag
{
public:
  BDSFieldMagMultipole(BDSMagnetStrength const* strength,
                       G4double          const  brho,
                       G4int             const  orderIn = 12);
  
  virtual ~BDSFieldMagMultipole(){;}
 
  virtual G4ThreeVector GetField(const G4ThreeVector &position,
                                 const G4double       t = 0) const;
 
private:
  BDSFieldMagMultipole();
 
  G4int order;
 
  G4int maximumNonZeroOrder;
 
  std::vector<G4double> normalComponents;
 
  std::vector<G4double> skewComponents;
};
 
#endif