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// $Id: G4VTrackTerminator.hh,v 1.8 2007/06/01 07:53:26 ahoward Exp $
// GEANT4 tag $Name: geant4-09-02 $
//
// ----------------------------------------------------------------------
// Class G4VTrackTerminator
//
// Class description:
//
// This is an interface for an object which can be called to kill a track.
// The type it provides is needed in case importance biasing and scoring
// is done at the same time. 
// For navigation in the parallel geometry which is done by the importance
// biasing process (it derives from G4ParallelTransport), importance biasing
// has to be done before scoring (to score the correct volume).
// But since scoring would not be called if the importance biasing kills a
// track, it only tells a G4VTrackTerminator to kill the track.
// The scoring process implements the interface G4VTrackTerminator
// and is now able to kill the track after it has performed the scoring.

// Author: Michael Dressel (Michael.Dressel@cern.ch)
// ----------------------------------------------------------------------
#ifndef G4VTrackTerminator_hh
#define G4VTrackTerminator_hh G4VTrackTerminator_hh

#include "G4Types.hh"
#include "G4String.hh"

class G4VTrackTerminator
{

public:  // with description

  G4VTrackTerminator();
  virtual ~G4VTrackTerminator();
  virtual void KillTrack() const = 0;
  virtual const G4String &GetName() const = 0;

protected:

  G4double kCarTolerance;
};

#endif