geomgraph/Edge.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
 * Copyright (C) 2005-2006 Refractions Research Inc.
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 *
 * 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.
 *
 **********************************************************************
 *
 * Last port: geomgraph/Edge.java r428 (JTS-1.12+)
 *
 **********************************************************************/
 
 
#pragma once
 
#include <geos/export.h>
#include <string>
#include <cassert>
 
#include <geos/geomgraph/GraphComponent.h> // for inheritance
#include <geos/geomgraph/Depth.h> // for member
#include <geos/geomgraph/EdgeIntersectionList.h> // for composition
#include <geos/geom/CoordinateSequence.h> // for inlines
#include <geos/geom/Envelope.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
 
// Forward declarations
namespace geos {
namespace geom {
class IntersectionMatrix;
class Coordinate;
}
namespace algorithm {
class LineIntersector;
}
namespace geomgraph {
class Node;
class EdgeEndStar;
class Label;
class NodeFactory;
namespace index {
class MonotoneChainEdge;
}
}
}
 
namespace geos {
namespace geomgraph { // geos.geomgraph
 
class GEOS_DLL Edge: public GraphComponent {
    using GraphComponent::updateIM;
 
private:
 
    std::unique_ptr<index::MonotoneChainEdge> mce;
 
    geom::Envelope env;
 
    Depth depth;
 
    int depthDelta;   // the change in area depth from the R to L side of this edge
 
    bool isIsolatedVar;
 
public:
 
    void
    testInvariant() const
    {
        assert(pts);
        assert(pts->size() > 1);
    }
 
    friend std::ostream& operator<< (std::ostream& os, const Edge& el);
 
    static void updateIM(const Label& lbl, geom::IntersectionMatrix& im);
 
    std::unique_ptr<geom::CoordinateSequence> pts;
 
    EdgeIntersectionList eiList;
 
    Edge(geom::CoordinateSequence* newPts, const Label& newLabel);
 
    Edge(geom::CoordinateSequence* newPts);
 
    ~Edge() override;
 
    virtual size_t
    getNumPoints() const
    {
        return pts->getSize();
    }
 
    virtual const geom::CoordinateSequence*
    getCoordinates() const
    {
        testInvariant();
        return pts.get();
    }
 
    virtual const geom::Coordinate&
    getCoordinate(std::size_t i) const
    {
        testInvariant();
        return pts->getAt(i);
    }
 
    virtual const geom::Coordinate&
    getCoordinate() const
    {
        testInvariant();
        return pts->getAt(0);
    }
 
 
    virtual Depth&
    getDepth()
    {
        testInvariant();
        return depth;
    }
 
    virtual int
    getDepthDelta() const
    {
        testInvariant();
        return depthDelta;
    }
 
    virtual void
    setDepthDelta(int newDepthDelta)
    {
        depthDelta = newDepthDelta;
        testInvariant();
    }
 
    virtual size_t
    getMaximumSegmentIndex() const
    {
        testInvariant();
        return getNumPoints() - 1;
    }
 
    virtual EdgeIntersectionList&
    getEdgeIntersectionList()
    {
        testInvariant();
        return eiList;
    }
 
    virtual index::MonotoneChainEdge* getMonotoneChainEdge();
 
    virtual bool
    isClosed() const
    {
        testInvariant();
        return pts->getAt(0) == pts->getAt(getNumPoints() - 1);
    }
 
    virtual bool isCollapsed() const;
 
    virtual Edge* getCollapsedEdge();
 
    virtual void
    setIsolated(bool newIsIsolated)
    {
        isIsolatedVar = newIsIsolated;
        testInvariant();
    }
 
    bool
    isIsolated() const override
    {
        testInvariant();
        return isIsolatedVar;
    }
 
    virtual void addIntersections(algorithm::LineIntersector* li, std::size_t segmentIndex,
                                  std::size_t geomIndex);
 
    //
    virtual void addIntersection(algorithm::LineIntersector* li, std::size_t segmentIndex,
                                 std::size_t geomIndex, std::size_t intIndex);
 
    //
    void
    computeIM(geom::IntersectionMatrix& im) override
    {
        updateIM(label, im);
        testInvariant();
    }
 
    virtual bool isPointwiseEqual(const Edge* e) const;
 
    virtual std::string print() const;
 
    virtual std::string printReverse() const;
 
    virtual bool equals(const Edge& e) const;
 
    virtual bool
    equals(const Edge* e) const
    {
        assert(e);
        return equals(*e);
    }
 
    virtual const geom::Envelope* getEnvelope();
};
 
 
//Operators
inline bool
operator==(const Edge& a, const Edge& b)
{
    return a.equals(b);
}
 
std::ostream& operator<< (std::ostream& os, const Edge& el);
 
 
} // namespace geos.geomgraph
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif