RectangleIntersectionBuilder.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2014 Mika Heiskanen <mika.heiskanen@fmi.fi>
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************/
 
#ifndef GEOS_OP_INTERSECTION_RECTANGLEINTERSECTIONBUILDER_H
#define GEOS_OP_INTERSECTION_RECTANGLEINTERSECTIONBUILDER_H
 
#include <geos/export.h>
 
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif
 
#include <memory>
#include <list>
#include <vector>
 
 
// Forward declarations
namespace geos {
  namespace geom {
        class Coordinate;
        class Geometry;
        class GeometryFactory;
        class Polygon;
        class LineString;
        class Point;
  }
  namespace operation {
        namespace intersection {
          class Rectangle;
        }
  }
}
 
namespace geos {
namespace operation { // geos::operation
namespace intersection { // geos::operation::intersection

 
class GEOS_DLL RectangleIntersectionBuilder
{
  // Regular users are not supposed to use this utility class.
  friend class RectangleIntersection;
 
public:
 
  ~RectangleIntersectionBuilder();
 
private:

  std::auto_ptr<geom::Geometry> build();

  void reconnectPolygons(const Rectangle & rect);

  void reconnect();
 
  void reverseLines();

  void release(RectangleIntersectionBuilder & parts);
 
  // Adding Geometry components
  void add(geom::Polygon * g);
  void add(geom::LineString * g);
  void add(geom::Point * g);
 
  // Trivial methods
  bool empty() const;
  void clear();
 
  // Added components
  std::list<geom::Polygon *> polygons;
  std::list<geom::LineString *> lines;
  std::list<geom::Point *> points;

  void close_boundary(
          const Rectangle & rect,
          std::vector<geom::Coordinate> * ring,
          double x1, double y1,
          double x2, double y2);
 
  void close_ring(const Rectangle & rect, std::vector<geom::Coordinate> * ring);
 
  RectangleIntersectionBuilder(const geom::GeometryFactory& f)
    : _gf(f) {}
 
  const geom::GeometryFactory &_gf;
 
}; // class RectangleIntersectionBuilder
 
} // namespace geos::operation::intersection
} // namespace geos::operation
} // namespace geos
 
#endif // GEOS_OP_INTERSECTION_RECTANGLEINTERSECTIONBUILDER_H