142 lines
3.9 KiB
C++
142 lines
3.9 KiB
C++
/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2006 Refractions Research Inc.
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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**********************************************************************
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*
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* Last port: noding/MCIndexNoder.java rev. 1.6 (JTS-1.9)
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*
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**********************************************************************/
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#pragma once
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#include <geos/export.h>
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#include <geos/index/chain/MonotoneChainOverlapAction.h> // for inheritance
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#include <geos/index/chain/MonotoneChain.h>
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#include <geos/index/strtree/TemplateSTRtree.h> // for composition
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#include <geos/noding/NodedSegmentString.h>
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#include <geos/noding/SegmentString.h>
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#include <geos/noding/SinglePassNoder.h> // for inheritance
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#include <geos/util.h>
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#include <vector>
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#include <iostream>
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#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
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#endif
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// Forward declarations
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namespace geos {
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namespace geom {
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class LineSegment;
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class Envelope;
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}
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namespace noding {
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class SegmentString;
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class SegmentIntersector;
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}
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}
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namespace geos {
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namespace noding { // geos.noding
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/** \brief
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* Nodes a set of SegmentString using a index based
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* on [MonotoneChain](@ref index::chain::MonotoneChain)
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* and a [SpatialIndex](@ref index::SpatialIndex).
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*
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* The [SpatialIndex](@ref index::SpatialIndex) used should be something that supports
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* envelope (range) queries efficiently (such as a [Quadtree](@ref index::quadtree::Quadtree)
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* or [STRtree](@ref index::strtree::STRtree)).
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*
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* Last port: noding/MCIndexNoder.java rev. 1.4 (JTS-1.7)
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*/
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class GEOS_DLL MCIndexNoder : public SinglePassNoder {
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private:
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std::vector<index::chain::MonotoneChain> monoChains;
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index::strtree::TemplateSTRtree<const index::chain::MonotoneChain*> index;
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std::vector<SegmentString*>* nodedSegStrings;
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// statistics
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int nOverlaps;
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double overlapTolerance;
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bool indexBuilt;
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void intersectChains();
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void add(SegmentString* segStr);
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public:
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MCIndexNoder(SegmentIntersector* nSegInt = nullptr, double p_overlapTolerance = 0.0)
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: SinglePassNoder(nSegInt)
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, nodedSegStrings(nullptr)
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, nOverlaps(0)
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, overlapTolerance(p_overlapTolerance)
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, indexBuilt(false)
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{}
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~MCIndexNoder() override {};
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/// \brief Return a reference to this instance's std::vector of MonotoneChains
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std::vector<index::chain::MonotoneChain>&
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getMonotoneChains()
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{
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return monoChains;
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}
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index::SpatialIndex& getIndex()
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{
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return index;
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}
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std::vector<SegmentString*>* getNodedSubstrings() const override
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{
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assert(nodedSegStrings); // must have called computeNodes before!
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return NodedSegmentString::getNodedSubstrings(*nodedSegStrings);
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}
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void computeNodes(std::vector<SegmentString*>* inputSegmentStrings) override;
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class SegmentOverlapAction : public index::chain::MonotoneChainOverlapAction {
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public:
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SegmentOverlapAction(SegmentIntersector& newSi)
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:
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index::chain::MonotoneChainOverlapAction(),
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si(newSi)
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{}
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void overlap(const index::chain::MonotoneChain& mc1, std::size_t start1,
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const index::chain::MonotoneChain& mc2, std::size_t start2) override;
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private:
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SegmentIntersector& si;
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// Declare type as noncopyable
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SegmentOverlapAction(const SegmentOverlapAction& other) = delete;
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SegmentOverlapAction& operator=(const SegmentOverlapAction& rhs) = delete;
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};
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};
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} // namespace geos.noding
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} // namespace geos
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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