MCIndexNoder.h

/**********************************************************************
 *
 * 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/MCIndexNoder.java rev. 1.6 (JTS-1.9)
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
 
#include <geos/index/chain/MonotoneChainOverlapAction.h> // for inheritance
#include <geos/index/chain/MonotoneChain.h>
#include <geos/index/strtree/TemplateSTRtree.h> // for composition
#include <geos/noding/NodedSegmentString.h>
#include <geos/noding/SegmentString.h>
#include <geos/noding/SinglePassNoder.h> // for inheritance
#include <geos/util.h>
 
#include <vector>
#include <iostream>
 
#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 LineSegment;
class Envelope;
}
namespace noding {
class SegmentString;
class SegmentIntersector;
}
}
 
namespace geos {
namespace noding { // geos.noding
 
class GEOS_DLL MCIndexNoder : public SinglePassNoder {
 
private:
    std::vector<index::chain::MonotoneChain> monoChains;
    index::strtree::TemplateSTRtree<const index::chain::MonotoneChain*> index;
    std::vector<SegmentString*>* nodedSegStrings;
    // statistics
    int nOverlaps;
    double overlapTolerance;
    bool indexBuilt;
 
    void intersectChains();
 
    void add(SegmentString* segStr);
 
public:
 
    MCIndexNoder(SegmentIntersector* nSegInt = nullptr, double p_overlapTolerance = 0.0)
        : SinglePassNoder(nSegInt)
        , nodedSegStrings(nullptr)
        , nOverlaps(0)
        , overlapTolerance(p_overlapTolerance)
        , indexBuilt(false)
    {}
 
    ~MCIndexNoder() override {};
 
 
    std::vector<index::chain::MonotoneChain>&
    getMonotoneChains()
    {
        return monoChains;
    }
 
    index::SpatialIndex& getIndex()
    {
        return index;
    }
 
    std::vector<SegmentString*>* getNodedSubstrings() const override
    {
        assert(nodedSegStrings); // must have called computeNodes before!
        return NodedSegmentString::getNodedSubstrings(*nodedSegStrings);
    }
 
    void computeNodes(std::vector<SegmentString*>* inputSegmentStrings) override;
 
    class SegmentOverlapAction : public index::chain::MonotoneChainOverlapAction {
    public:
        SegmentOverlapAction(SegmentIntersector& newSi)
            :
            index::chain::MonotoneChainOverlapAction(),
            si(newSi)
        {}
 
        void overlap(const index::chain::MonotoneChain& mc1, std::size_t start1,
                     const index::chain::MonotoneChain& mc2, std::size_t start2) override;
    private:
        SegmentIntersector& si;
 
        // Declare type as noncopyable
        SegmentOverlapAction(const SegmentOverlapAction& other) = delete;
        SegmentOverlapAction& operator=(const SegmentOverlapAction& rhs) = delete;
    };
 
};
 
} // namespace geos.noding
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif