// This code implementation is the intellectual property of
// the GEANT4 collaboration.
//
// By copying, distributing or modifying the Program (or any work
// based on the Program) you indicate your acceptance of this statement,
// and all its terms.
//
// $Id: G4SolidExtentList.hh,v 1.3 2000/11/02 16:54:49 gcosmo Exp $
// GEANT4 tag $Name: geant4-03-00 $
//
// 
// --------------------------------------------------------------------
// 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 solid for a voxel
//   (G4VSolid::CalculateExtent). 

// Author: 
//   David C. Williams (davidw@scipp.ucsc.edu)
// --------------------------------------------------------------------

#ifndef G4SolidExtentList_hh
#define G4SolidExtentList_hh

#include "globals.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