//
// ********************************************************************
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//
// $Id: G4ImportanceFinder.hh,v 1.6 2002/10/14 12:36:00 dressel Exp $
// GEANT4 tag $Name: geant4-05-00 $
//
// ----------------------------------------------------------------------
// Class G4ImportanceFinder
//
// Class description:
//
// This class is used internally by importance sampling in a parallel
// geometry. It derives the ratio of importances of the pre over the post
// G4GeometryCell. 

// Author: Michael Dressel (Michael.Dressel@cern.ch)
// ----------------------------------------------------------------------
#ifndef G4ImportanceFinder_hh
#define G4ImportanceFinder_hh G4ImportanceFinder_hh

#include "globals.hh"

class G4VParallelStepper;
class G4VIStore;
class G4GeometryCell;

class G4ImportanceFinder
{

public:  // with description

  explicit G4ImportanceFinder(const G4VIStore &aIStore);
    // initialise fIStore

  ~G4ImportanceFinder();
    // destruction

  G4double GetImportance(const G4GeometryCell &gCell) const;
  // get the importance to a G4GeometryCell

private:

  void Error(const G4String &m) const;

private:

  const G4VIStore &fIStore;
};

#endif