RobustClipEnvelopeComputer.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2020 Paul Ramsey <pramsey@cleverelephant.ca>
 *
 * 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.
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
#include <geos/geom/Envelope.h>
 
#include <vector>
#include <map>
 
 
// Forward declarations
namespace geos {
namespace geom {
class Coordinate;
class Geometry;
class GeometryCollection;
class Polygon;
class LinearRing;
}
namespace operation {
}
}
 
namespace geos {      // geos.
namespace operation { // geos.operation
namespace overlayng { // geos.operation.overlayng

class GEOS_DLL RobustClipEnvelopeComputer {
    using Coordinate = geos::geom::Coordinate;
    using Geometry = geos::geom::Geometry;
    using GeometryCollection = geos::geom::GeometryCollection;
    using Polygon = geos::geom::Polygon;
    using LinearRing = geos::geom::LinearRing;
    using Envelope = geos::geom::Envelope;
 
private:
 
    // Members
    const Envelope* targetEnv;
    Envelope clipEnv;
 
    // Methods
    void add(const Geometry* g);
    void addCollection(const GeometryCollection* gc);
    void addPolygon(const Polygon* poly);
    void addPolygonRing(const LinearRing* ring);
    void addSegment(const Coordinate& p1, const Coordinate& p2);
    bool intersectsSegment(const Envelope* env, const Coordinate& p1, const Coordinate& p2);
 
 
 
public:
 
    RobustClipEnvelopeComputer(const Envelope* p_targetEnv);
 
    static Envelope getEnvelope(const Geometry* a, const Geometry* b, const Envelope* targetEnv);
 
    Envelope getEnvelope();
 
};
 
 
} // namespace geos.operation.overlayng
} // namespace geos.operation
} // namespace geos