BDSBeamPipeFactoryOctagonal.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 BDSBEAMPIPEFACTORYOCTAGONAL_H
#define BDSBEAMPIPEFACTORYOCTAGONAL_H
 
#include "BDSBeamPipeFactoryPoints.hh"
 
namespace BDS
{
  struct FourPoints
  {
    G4double aper1;
    G4double aper2;
    G4double aper3;
    G4double aper4;
  };
}
 
class BDSBeamPipeFactoryOctagonal: public BDSBeamPipeFactoryPoints
{
public:
  BDSBeamPipeFactoryOctagonal();
  virtual ~BDSBeamPipeFactoryOctagonal(){;}
  
private:
  virtual void GeneratePoints(G4double aper1,
                              G4double aper2,
                              G4double aper3,
                              G4double aper4,
                              G4double beamPipeThickness,
                              G4int    pointsPerTwoPi = 40);
 
  virtual G4double CalculateIntersectionRadius(G4double aper1,
                                               G4double aper2,
                                               G4double aper3,
                                               G4double aper4,
                                               G4double beamPipeThickness);
 
  void GenerateOctagonal(std::vector<G4TwoVector>& vec,
                         G4double x1,
                         G4double y1,
                         G4double x2,
                         G4double y2);
 
  BDS::FourPoints ExpandOctagon(G4double aper1,
                           G4double aper2,
                           G4double aper3,
                           G4double aper4,
                           G4double distance);
};
  
#endif