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// $Id$
//
// --------------------------------------------------------------------
// GEANT 4 class header file
//
// G4RegularNavigationHelper
//
// Class description:
//
// Utility class for navigation on regular structures, providing step
// lengths counting for each regular voxel of the structure.

// Author: Pedro Arce, November 2008
// --------------------------------------------------------------------
#ifndef G4RegularNavigationHelper_HH
#define G4RegularNavigationHelper_HH

#include <vector>
#include "globals.hh"

class G4RegularNavigationHelper
{
  public:
    static G4RegularNavigationHelper * Instance();
   ~G4RegularNavigationHelper();
  
    void ClearStepLengths();
    void AddStepLength( G4int copyNo, G4double slen );
    const std::vector< std::pair<G4int,G4double> > & GetStepLengths();

    std::vector< std::pair<G4int,G4double> > theStepLengths;

  private:
    G4RegularNavigationHelper();
    static G4RegularNavigationHelper * theInstance;
};

#endif