// HitCylPhiZGenerator.h

#ifndef HitCylPhiZGenerator_H
#define HitCylPhiZGenerator_H

// Generator for ClusCylPhiZ objects.

#include "ptr/Ptr.h"
#include "ptr/DeletePolicy.h"
#include "trfbase/HitGenerator.h"
#include "SurfCylinder.h"

namespace trf {

class HitCylPhiZGenerator : public HitGenerator {

private:  // attributes

  // the surface
  Ptr<Surface,DeletePolicy> _psrf;

  // the mixing parameter stereo: phiz = phi + stereo*z;
  double _stereo;

  // Error (standard deviation) for the measurement.
  double _dphiz;

private:  // methods

  // hide assignment operator
  HitCylPhiZGenerator& operator=(const HitCylPhiZGenerator& rhs);

  // output stream
  void ostr(std::ostream& stream) const;

public:

  // Constructor from cylinder radius, mixing and measurement sigma.
  HitCylPhiZGenerator(const SurfCylinder& srf, double stereo,
                      double dphiz);

  // Constructor from above plus random number seed.
  HitCylPhiZGenerator(const SurfCylinder& srf, double stereo, 
                      double dphiz, long iseed);

  // Copy constructor.
  HitCylPhiZGenerator(const HitCylPhiZGenerator& rhs);

  // Destructor.
  ~HitCylPhiZGenerator();

  // Return the surface.
  const Surface& get_surface() const { return *_psrf; };

  // Generate a new cluster.
  // Caller must delete.
  // Return 0 for failure.
  Cluster* new_cluster(const VTrack& trv);

};

}  // end namespace trf

#endif