geomgraph/Edge.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2011 Sandro Santilli <strk@keybit.net>
 * 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+)
 *
 **********************************************************************/
 
 
#ifndef GEOS_GEOMGRAPH_EDGE_H
#define GEOS_GEOMGRAPH_EDGE_H
 
#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/inline.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 Envelope;
                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::string name;

        index::MonotoneChainEdge *mce;

        geom::Envelope *env;
 
        bool isIsolatedVar;
 
        Depth depth;
 
        int depthDelta;   // the change in area depth from the R to L side of this edge
 
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);

        geom::CoordinateSequence* pts;
 
        EdgeIntersectionList eiList;
 
        //Edge();

        Edge(geom::CoordinateSequence* newPts, const Label& newLabel);

        Edge(geom::CoordinateSequence* newPts);
 
        virtual ~Edge();
 
        virtual int getNumPoints() const {
                return static_cast<int>(pts->getSize());
        }
 
        virtual void setName(const std::string &newName) {
                name=newName;
        }
 
        virtual const geom::CoordinateSequence* getCoordinates() const {
                testInvariant();
                return pts;
        }
 
        virtual const geom::Coordinate& getCoordinate(int 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 int 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();
        }
 
        virtual bool isIsolated() const {
                testInvariant();
                return isIsolatedVar;
        }

        virtual void addIntersections(algorithm::LineIntersector *li, int segmentIndex,
                int geomIndex);

        //
        virtual void addIntersection(algorithm::LineIntersector *li, int segmentIndex,
                int geomIndex, int intIndex);

        //
        virtual void computeIM(geom::IntersectionMatrix& im) {
                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 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
 
//#ifdef GEOS_INLINE
//# include "geos/geomgraph/Edge.inl"
//#endif
 
#endif // ifndef GEOS_GEOMGRAPH_EDGE_H