#ifndef ISOSCELESPENTAGON
#define ISOSCELESPENTAGON
//===========================================================================
//
//    Class      : IsoscelesPentagon
//    Created    : 30-JAN-1998 by Stephen Kahn
//    Purpose    : Characterize the Middle Hadronic End Cap calorimeter
//                 as a pentagon with bilateral symmetry.  There is no
//                 corresponding Geant shape.  A method to write out
//                 two trapezoid for Geant will be available
//
//                                  * 1
//                               *     *
//                          2 *           * 3   (Excuse the poor
//                             *         *       quality diagram)
//                              *       *
//                               *     *
//                              4 ***** 5
//===========================================================================

#include <geometry_system/components/GeometryElement.hpp>
#include <geometry_system/components/CartesianCoordinate.hpp>

namespace dgs {
/**  A pentagon with bilateral symmetry.

     Characterize the Middle Hadronic End Cap calorimeter as a
     pentagon with bilateral symmetry.  There is no corresponding
     Geant shape.  A method to write out two trapezoid for Geant will
     be available

     \begin{verbatim}
                                  x 1
                               x     x
                          2 x           x 3   (Excuse the poor
                             x         x       quality diagram)
                              x       x
                               x     x
                              4 xxxxx 5

			      \end{verbatim}
			      
*/
class  IsoscelesPentagon  :  public  GeometryElement

{
private :
  /// Half height from base to tip
  double  _pent_half_height;   
  /// Half height from base to line connecting pt 2 to pt 3 (above)
  double  _trap_half_height; 
  /// Half dist pt 4 to pt 5
  double  _inner_half_width;    
  /// Half dist pt 2 to pt 3
  double  _outer_half_width;    
  ///  Half-length
  double  _half_length;

  /// Support for positioning children.
  CartesianCoordinate xform_to_local(const GeometryXform& )const;
  /// Support for positioning children.
  GeometryXform local_to_xform(const CartesianCoordinate& )const;
  /// nominal Global position 
  CartesianCoordinate  _PentCenter;  

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

public  :
  ///  Default constructor.
  IsoscelesPentagon(): _cvers("$Revision: 1.8 $") {}
  ///  Fill pentagon
  void  fill_Pentagon( double, double, double, double, double );
  ///  Get half height from base to tip
  double  get_pent_half_height() const { return _pent_half_height; }
  ///  Get half height from base to line connecting pt 2 to pt 3 (above)
  double  get_trap_half_height() const { return _trap_half_height; }
  ///  Get half dist pt 4 to pt 5
  double  get_inner_half_width() const { return _inner_half_width; }
  ///  Get half dist pt 2 to pt 3
  double  get_outer_half_width() const { return _outer_half_width; }
  ///  Get half-length
  double  get_half_length()      const{ return _half_length; }

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

  ///  Set center of pentagon to Cartesian x,y,z point
  void  set_center_xyz();  // set from Xform
  void  set_center_xyz( double, double, double);
  ///  Set Xform.
  void  set_Xform(double, double, double, double );
  ///  Position child surface at given local point.
  bool  position_child_at( const CartesianCoordinate& , GeometryElement& );
  bool  position_child_at( const GeometryXform&, GeometryElement&);
  ///  Get center of pentagon
  CartesianCoordinate  get_center() const { return _PentCenter; }

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

        D0_OBJECT_SETUP(IsoscelesPentagon);  // persistent class
};
}
#endif // ISOSCELESPENTAGON