RectangleIntersectionBuilder.h

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/**********************************************************************
 *
 * 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::unique_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