#ifndef TUBULARSECTION_HH
#define TUBULARSECTION_HH
//============================================================================
//
//   Class      : TubularSection
//   Created    : 19-JAN-1998 by Stephen Kahn
//   Purpose    : TUBS type GeometryElement
//
//============================================================================

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

namespace dgs {

class  CylindricalCoordinate;

///  A tubular section.
class  TubularSection : public TubularShell
{   	
private:
  ///  Lower phi
  double _phi_lower;  
  ///  Upper phi
  double _phi_upper;
  ///  Tube section center
  CartesianCoordinate _Tube_Section_Ctr;
  ///  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;
  /// Support for positioning children.
  CartesianCoordinate xform_to_local( const GeometryXform&) const;
  /// Support for positioning children.
  GeometryXform  local_to_xform(const CartesianCoordinate&) const;

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

public :
  ///  Default constructor
  TubularSection(): _cvers("$Revision: 1.8 $"){}
  ///  Fill tubular section
  void fill_TubularSection( const double dz, const double ri, 
			    const double ro, const double phi1, const double phi2) ; 
  ///  Get lower phi
  double  get_phi_lower() const { return _phi_lower;}
  ///  Get upper phi
  double  get_phi_upper() const { return _phi_upper;}
  ///  Set center of tubular section as x,y,z Cartesian point
  void  set_center_xyz( double, double, double);
  void  set_center_xyz();
  ///  Position child surface at specified local point
  bool position_child_at(const CartesianCoordinate&, GeometryElement& );
  bool position_child_at( const GeometryXform&, GeometryElement&);
  ///  Set xform
  void  set_Xform( double, double, double, double);
  ///  Get center of tubular section
  CartesianCoordinate  get_center()
    {  return  _Tube_Section_Ctr; }

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

  D0_OBJECT_SETUP(TubularSection);  // persistent class
};
}
#endif // TUBULARSECTION_HH