IntersectionAdder.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2006      Refractions Research 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: noding/IntersectionAdder.java rev. 1.6 (JTS-1.9)
 *
 **********************************************************************/

#ifndef GEOS_NODING_INTERSECTIONADDER_H
#define GEOS_NODING_INTERSECTIONADDER_H

#include <geos/export.h>

#include <vector>
#include <iostream>
#include <cstdlib> // for abs()

#include <geos/inline.h>

#include <geos/geom/Coordinate.h>
#include <geos/noding/SegmentIntersector.h> // for inheritance

// Forward declarations
namespace geos {
namespace noding {
class SegmentString;
}
namespace algorithm {
class LineIntersector;
}
}

namespace geos {
namespace noding { // geos.noding

class GEOS_DLL IntersectionAdder: public SegmentIntersector {

private:

    bool hasIntersectionVar;
    bool hasProper;
    bool hasProperInterior;
    bool hasInterior;

    // the proper intersection point found
    geom::Coordinate properIntersectionPoint;

    algorithm::LineIntersector& li;
    // bool isSelfIntersection;
    // bool intersectionFound;

    bool isTrivialIntersection(const SegmentString* e0, size_t segIndex0,
                               const SegmentString* e1, size_t segIndex1);

    // Declare type as noncopyable
    IntersectionAdder(const IntersectionAdder& other) = delete;
    IntersectionAdder& operator=(const IntersectionAdder& rhs) = delete;

public:

    int numIntersections;
    int numInteriorIntersections;
    int numProperIntersections;

    // testing only
    int numTests;

    IntersectionAdder(algorithm::LineIntersector& newLi)
        :
        hasIntersectionVar(false),
        hasProper(false),
        hasProperInterior(false),
        hasInterior(false),
        properIntersectionPoint(),
        li(newLi),
        numIntersections(0),
        numInteriorIntersections(0),
        numProperIntersections(0),
        numTests(0)
    {}

    algorithm::LineIntersector&
    getLineIntersector()
    {
        return li;
    }

    const geom::Coordinate&
    getProperIntersectionPoint()
    {
        return properIntersectionPoint;
    }

    bool
    hasIntersection()
    {
        return hasIntersectionVar;
    }

    bool
    hasProperIntersection()
    {
        return hasProper;
    }

    bool
    hasProperInteriorIntersection()
    {
        return hasProperInterior;
    }

    bool
    hasInteriorIntersection()
    {
        return hasInterior;
    }


    void processIntersections(
        SegmentString* e0,  size_t segIndex0,
        SegmentString* e1,  size_t segIndex1) override;


    static bool
    isAdjacentSegments(size_t i1, size_t i2)
    {
        return (i1 > i2 ? i1 - i2 : i2 - i1) == 1;
    }

    bool
    isDone() const override
    {
        return false;
    }
};


} // namespace geos.noding
} // namespace geos

#endif // GEOS_NODING_INTERSECTIONADDER_H