// HitCylPhiGenerator.h

#ifndef HitCylPhiGenerator_H
#define HitCylPhiGenerator_H

// Generator for ClusCylPhi objects.

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

namespace trf {

class HitCylPhiGenerator : public HitGenerator {

private:  // attributes

  // the surface
  // Hold by pointer so user can pass a subclass.
  Ptr<Surface,DeletePolicy> _psrf;

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

private:  // methods

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

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

public:

  // Constructor from cylinder and the measurement sigma.
  // The cylinder is cloned so user can pass subclass.
  HitCylPhiGenerator(const SurfCylinder& srf, double dphi);

  // Constructor from above plus random number seed.
  HitCylPhiGenerator(const SurfCylinder& srf, double dphi, long seed);

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

  // Destructor.
  ~HitCylPhiGenerator();

  // 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