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//
// $Id: G4SolidExtentList.hh,v 1.7 2006/06/29 18:47:32 gunter Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
// 
// --------------------------------------------------------------------
// GEANT 4 class header file
//
//
// G4SolidExtentList
//
// Class description:
//
//   Defines a list of (voxel) extents along one axis.
//
//   This utility class is designed for one specific purpose:
//   to calculate the extent of a CSG-like solid for a voxel
//   (G4VSolid::CalculateExtent). 

// Author: 
//   David C. Williams (davidw@scipp.ucsc.edu)
// --------------------------------------------------------------------
#ifndef G4SolidExtentList_hh
#define G4SolidExtentList_hh

#include "G4Types.hh"

#include "G4ClippablePolygon.hh"

class G4SolidExtentList
{
  public:
  
  G4SolidExtentList();
  G4SolidExtentList( const EAxis targetAxis,
                     const G4VoxelLimits &voxelLimits );
  ~G4SolidExtentList();


  void AddSurface( const G4ClippablePolygon &surface );

  G4bool GetExtent( G4double &min, G4double &max ) const;

  protected:
  
  EAxis    axis;     // Target axis
  G4bool   limited;  // True if limited
  G4double minLimit; // ... min limit
  G4double maxLimit; // ... max limit

  G4ClippablePolygon minSurface,  // Minimum surface within limits
                     maxSurface,  // Maximum
                     minAbove,    // Minimum surface totally above max limit
                     maxBelow;    // Maximum surface totally below min limit
};

#endif
