BDSFieldEMInterpolated1D.cc

/* 
Beam Delivery Simulation (BDSIM) Copyright (C) Royal Holloway, 
University of London 2001 - 2023.
 
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/>.
*/
#include "BDSDimensionType.hh"
#include "BDSFieldEMInterpolated1D.hh"
#include "BDSInterpolator1D.hh"
 
#include "G4ThreeVector.hh"
#include "G4Types.hh"
 
#include <utility>
 
BDSFieldEMInterpolated1D::BDSFieldEMInterpolated1D(BDSInterpolator1D*   eInterpolatorIn,
                                                   BDSInterpolator1D*   bInterpolatorIn,
                                                   const G4Transform3D& offset,
                                                   G4double             eScalingIn,
                                                   G4double             bScalingIn):
  BDSFieldEMInterpolated(eInterpolatorIn, bInterpolatorIn, offset, eScalingIn, bScalingIn),
  eInterpolator(eInterpolatorIn),
  bInterpolator(bInterpolatorIn),
  eDimensionIndex((eInterpolatorIn->FirstDimension()).underlying()),
  eTime((eInterpolatorIn->FirstDimension()).underlying() > 2),
  bDimensionIndex((bInterpolatorIn->FirstDimension()).underlying()),
  bTime((bInterpolatorIn->FirstDimension()).underlying() > 2)
{;}
 
BDSFieldEMInterpolated1D::~BDSFieldEMInterpolated1D()
{
  delete eInterpolator;
  delete bInterpolator;
}
 
std::pair<G4ThreeVector,G4ThreeVector> BDSFieldEMInterpolated1D::GetField(const G4ThreeVector& position,
                                                                          const G4double       t) const
{
  G4double eCoordinate = 0;
  if (eTime)
    {eCoordinate = t;}
  else
    {eCoordinate = position[eDimensionIndex];}
  G4double bCoordinate = 0;
  if (bTime)
    {bCoordinate = t;}
  else
    {bCoordinate = position[bDimensionIndex];}
  G4ThreeVector e = eInterpolator->GetInterpolatedValue(eCoordinate) * EScaling();
  G4ThreeVector b = bInterpolator->GetInterpolatedValue(bCoordinate) * BScaling();
  return std::make_pair(b,e);
}