#ifndef ABSGEOMETRYDISTORTION_HPP
#define ABSGEOMETRYDISTORTION_HPP
//
// $Id: absGeometryDistortion.hpp,v 1.8 2001/01/30 21:22:05 hobbs Exp $
//
// File: absGeometryDistortion.hpp
// Purpose: Adjust a local point to account for distortions of the object.
//          This defines the interface needed to perform the distortion.
// Created: 19-JAN-1998   John Hobbs
//
// $Revision: 1.8 $
//
//

// Includes
class SpacePoint;
#include "d0om/d0_Object.hpp"
#include <iostream>

namespace dgs {
/** Abstract geometrical distortion.

    Adjust a local point to account for distortions of the object.
    This defines the interface needed to perform the distortion.

*/
class absGeometryDistortion: public d0_Object {
public:

  ///  Default constructor
  absGeometryDistortion();

  /// Destroy the complete type.
  virtual ~absGeometryDistortion() {}       

  /// Make a copy of the complete type for use as a distortion
  virtual absGeometryDistortion* clone() const =0; 

  /// Perform the distortion...
  virtual SpacePoint* distort(const SpacePoint& point_on_surface) const =0;

  /// Undo the distortion...
  virtual SpacePoint* undo(const SpacePoint& distored_point) const =0;

  /// Overloadable I/O
  virtual void printme(std::ostream& os) const =0;

  ///  Stream insertion operator
  friend std::ostream& operator <<(std::ostream& os, const absGeometryDistortion& me) {
   me.printme(os);
   return os;
  }

  D0_OBJECT_SETUP(absGeometryDistortion);

};
}
#endif //ABSGEOMETRYDISTORTION_HPP