// HitGenerator.h

#ifndef HitGenerator_H
#define HitGenerator_H

// Abtract interface for class to generate a cluster from a VTrack.
// The track is already at the the appropriate surface.  Its position
// is smeared to generate the hit.
//
// This class is used to generate simulated clusters which are used
// to create hits.  Note that it inherits from RandomGenerator and
// the member _rand may be used to generate random numbers (e.g.
// _rand.gauss(mean)).

#include "trfutil/RandomGenerator.h"

namespace trf {

class Surface;
class VTrack;
class Cluster;

class HitGenerator : public RandomGenerator {

private:

  // Hide assignment.
  HitGenerator& operator=(const HitGenerator& rhs);

public:

  // Constructor.
  HitGenerator();

  // Constructor from seed.
  HitGenerator(long seed);

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

  // Destructor.
  virtual ~HitGenerator();

  // Return the surface to which track should be propagated.
  virtual const Surface& get_surface() const =0;

  // Generate a new cluster from a track.
  // Caller is responsible for deleting the cluster.
  // Zero is returned if cluster was not created (e.g. if track is
  // not at surface).
  virtual Cluster* new_cluster(const VTrack& trv) =0;

};

}  // end namespace trf

#endif