Tracker.h

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#ifndef INCLUDE_EICSMEAR_SMEAR_TRACKER_H_
#define INCLUDE_EICSMEAR_SMEAR_TRACKER_H_

#include <Rtypes.h>  // For ClassDef

#include "eicsmear/smear/Distributor.h"
#include "eicsmear/smear/Smear.h"  // KinType
#include "eicsmear/smear/Smearer.h"

namespace erhic {

class VirtualParticle;

}  // namespace erhic

namespace Smear {

class ParticleMCS;

class Tracker : public Smearer {
 public:
  Tracker(double magneticField = 2., double nRadiationLengths = 0.01,
          double resolution = 0.001);

  virtual ~Tracker();

  virtual double Resolution(const erhic::VirtualParticle&) const;

  void Smear(const erhic::VirtualParticle&, ParticleMCS&);

  virtual double L(const erhic::VirtualParticle&) const = 0;

  virtual double LPrime(const erhic::VirtualParticle&) const = 0;

  virtual int NPoints(const erhic::VirtualParticle&) const = 0;

  virtual bool Accepts(const erhic::VirtualParticle&) const = 0;

  virtual double GetThetaMin() const = 0;

  virtual double GetThetaMax() const = 0;

  void SetVertexConstraint(bool constrain);

 protected:
  virtual double MultipleScatteringContribution(
    const erhic::VirtualParticle&) const;

  virtual double IntrinsicContribution(const erhic::VirtualParticle&) const;

  Int_t mFactor;  
  double mMagField;  
  double mNRadLengths;  
  double mSigmaRPhi;  
  Distributor Distribution;  

  ClassDef(Smear::Tracker, 1)
};

}  // namespace Smear

#endif  // INCLUDE_EICSMEAR_SMEAR_TRACKER_H_