#ifndef SLANTEDTUBESECTION_HH
#define SLANTEDTUBESECTION_HH
//============================================================================
//
//   Class      : SlantedTubeSection
//   Created    : 13-FEB-1998 by Stephen Kahn
//   Purpose    : Slanted Tube Section type GeometryElement.  To be used
//                to descibe cells in the OH calorimeter.
//                Local coordinates in this volume are r, phi, and zeta.
//                Zeta = z - (r - r_centoid)*tan(slant_angle)
//
//============================================================================

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

namespace dgs {

class  CylindricalCoordinate;

/** A slanted tube section.

    Slanted Tube Section type GeometryElement.  To be used to descibe
    cells in the OH calorimeter.  Local coordinates in this volume are
    r, phi, and zeta.  Zeta = z - (r - r\_centoid)*tan(slant\_angle)

*/
class  SlantedTubeSection : public TubularSection
{   	
private:
  ///  Slant angle.
  double _slant_angle;
  ///  tan(slant angle)
  double _tan_slant_angle;  
  /// RCS version
  std::string _cvers;  // Replaced at checkout


public :

  ///  Default constructor.
  SlantedTubeSection(): _cvers("$Revision: 1.5 $"){}
  ///  Fill slanted tube section.
  void fill_SlantedTubeSection( const double, const double, 
				const double, const double, const double, const double) ; 
  ///  Get slant angle.
  double  get_slant_angle() { return _slant_angle;}
  ///  Get inner radius.
  double  get_inner_radius() 
    { return TubularShell::get_inner_radius();}
  ///  Get outer radius.
  double  get_outer_radius() 
    { return TubularShell::get_outer_radius();}
  ///  Get zhalf.
  double  get_zhalf()
    { return TubularShell::get_zhalf();}
  ///  Get phi lower.
  double  get_phi_lower()
    { return TubularSection::get_phi_lower();}
  ///  Get phi upper.
  double  get_phi_upper()
    { return TubularSection::get_phi_upper();}
  ///  zeta from cylinder
  double  zeta_from_cylind( double, double);
  ///  Local to cartesian.
  CartesianCoordinate local_to_cartesian( double, double, double);
  ///  Get center.
  CartesianCoordinate  get_center()
    {  return  TubularSection::get_center(); }

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

  D0_OBJECT_SETUP(SlantedTubeSection);  // persistent class
};
}
#endif // SLANTEDTUBESECTION_HH