#ifndef BOX_HH
#define BOX_HH
//

//

// Include files
#include <geometry_system/components/GeometryElement.hpp>

namespace dgs {
class CartesianCoordinate;

///  A box.
class Box: public GeometryElement
{
public:

  ///  Default constructor.
  Box(): _cvers("Revision:$") {}

  ///  Construct a box with specified x,y,z half-lengths.
  Box(const double xhalf, const double yhalf, const double zhalf): 
    _xhalf(xhalf), _yhalf(yhalf), _zhalf(zhalf), _cvers("Revision:$") {}

  ///  Convert local point to global one.
  SpacePoint local_to_global(const CartesianCoordinate& lpt) const;

  ///  Convert global point to local one.
  CartesianCoordinate global_to_local(const SpacePoint& gpt) const;
  
  ///  Resize box by specified changes to x,y,z half-lengths.
  bool resize(const double dxhalf, const double dyhalf, const double dzhalf);

  ///  Position child surface at specified local point.
  bool position_child_at(const CartesianCoordinate& lpt, GeometryElement& kid);
  bool position_child_at(const GeometryXform& xfm, GeometryElement& kid);

  ///  Access x half-length.
  double get_xsize() const { return _xhalf; }

  ///  Access y half-length.
  double get_ysize() const { return _yhalf; }

  ///  Access z half-length.
  double get_zsize() const { return _zhalf; }

  /// Get source code version. Kept to allow following code changes
  const std::string& code_version() const { return _cvers; }

  ///  Stream insertion operator.
  friend std::ostream& operator<<(std::ostream& os, const Box& me);

private:

  ///  x half-length.
  double _xhalf;

  ///  y half-length.
  double _yhalf;

  ///  z half-length.
  double _zhalf;

  ///  Support for positioning children
  CartesianCoordinate xform_to_local(const GeometryXform& xf) const;

  ///  Support for positioning children
  GeometryXform local_to_xform(const CartesianCoordinate& lpt) const;

  /// RCS version
  std::string _cvers;  // Replaced at checkout

public:

  D0_OBJECT_SETUP(Box);

};
}
#endif //BOX_HH