HelixTrackModel.h

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/* Copyright 2013, Technische Universitaet Muenchen,
   Authors: Johannes Rauch
 
   This file is part of GENFIT.
 
   GENFIT is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published
   by the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
 
   GENFIT 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 Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General Public License
   along with GENFIT.  If not, see <http://www.gnu.org/licenses/>.
*/
 

 
#ifndef genfit_HelixTrackModel_h
#define genfit_HelixTrackModel_h
 
#include <TObject.h>
#include <TVector3.h>
 
 
namespace genfit {

class HelixTrackModel : public TObject {
 
 public:
 
  // Constructors/Destructors ---------
  HelixTrackModel(const TVector3& pos, const TVector3& mom, double charge);
 
  TVector3 getPos(double tracklength) const;
  void getPosMom(double tracklength, TVector3& pos, TVector3& mom) const;
  void getPosDir(double tracklength, TVector3& pos, TVector3& dir) const {
    getPosMom(tracklength, pos, dir);
    dir.SetMag(1);
  }
 
 
 private:
 
  double sgn_;
  double mom_;
  double R_; // radius
  TVector3 center_;
  double alpha0_;
  double theta_;
 
 
 public:
  ClassDef(HelixTrackModel,1)
 
};
 
} /* End of namespace genfit */
 
#endif // genfit_HelixTrackModel_h