#ifndef DISK_HH
#define DISK_HH
//
// $Id: Disk.hpp,v 1.4 1998/10/16 02:57:47 hobbs Exp $
//
// File: Disk.hh
// Purpose: Implement a disk positioning surface.  This is a trivial 
//    redefinition of AnnularSurface
// Created: 13-OCT-1997   John Hobbs
//
// $Revision: 1.4 $
//
//

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

namespace dgs {
/**  A disk.

     {\bf Disk} is a surface corresponding to an {\bf AnnularSurface}
     having $r_{min}=0$.  The interface, except the relevant
     constructor, is that of an {\bf AnnularSurface}.  

*/
class Disk: public AnnularSurface {
public:

  ///  Default constructor.
  Disk() {}

  ///  Construct disk with specified rmax.
  Disk(double rmax): AnnularSurface(0.0,rmax) {}

  D0_OBJECT_SETUP(Disk);
};
}
#endif //DISK_HH