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//
// 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 = false;  // 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
