PndHelixPropagator.h

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/*
 * PndHelixPropagator.h
 *
 *  Created on: Sep 23, 2013
 *      Author: stockman
 */

#ifndef PNDHELIXPROPAGATOR_H_
#define PNDHELIXPROPAGATOR_H_

#include "TObject.h"
#include "TVector3.h"
#include "FairTrackPar.h"
#include <utility>

class PndHelixPropagator : public TObject {
public:
        PndHelixPropagator();
        PndHelixPropagator(Double_t fieldStrength, TVector3 origin, TVector3 momentum, Double_t charge):
                fFieldStrength(fieldStrength), fOrigin(origin), fMomentum(momentum), fCharge(charge)
        {};
        virtual ~PndHelixPropagator();
        FairTrackPar PropagateToZ(Double_t zPos);               //< returns position and momentum at requested z-Value [cm]
        FairTrackPar PropagateToS(Double_t arcLength); 
        FairTrackPar PropagateByAngle(Double_t step); //< angle step in degrees from start position/momentum
        FairTrackPar PropagateToXYPos(TVector2 xyPos); //< propagate to closes distance to given xy position

private:
        Double_t Radius();

        Double_t fFieldStrength; //< magentic field strength in z-Direction in Tesla
        TVector3 fOrigin;                //< Origin of track in cm
        TVector3 fMomentum;              //< Momentum of track in GeV
        Double_t fCharge;                //< Sign of charge
public:
  ClassDef(PndHelixPropagator,1)
};

#endif /* PNDHELIXPROPAGATOR_H_ */