102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
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/**********************************************************************
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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) 2023 Paul Ramsey <pramsey@cleverelephant.ca>
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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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#pragma once
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// #include <geos/algorithm/LineIntersector.h>
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// #include <geos/geom/Coordinate.h>
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//#include <geos/geom/CoordinateSequence.h>
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#include <map>
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// Forward declarations
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namespace geos {
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namespace geom {
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class Coordinate;
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class CoordinateSequence;
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}
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namespace noding {
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class NodedSegmentString;
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}
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}
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using geos::geom::Coordinate;
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using geos::geom::CoordinateSequence;
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using geos::noding::NodedSegmentString;
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using geos::algorithm::LineIntersector;
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namespace geos {
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namespace triangulate {
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namespace polygon {
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/**
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* Adds node vertices to the rings of a polygon
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* where holes touch the shell or each other.
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* The structure of the polygon is preserved.
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*
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* This does not fix invalid polygon topology
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* (such as self-touching or crossing rings).
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* Invalid input remains invalid after noding,
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* and does not trigger an error.
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*/
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class GEOS_DLL PolygonNoder {
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public:
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PolygonNoder(
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std::unique_ptr<CoordinateSequence>& shellRing,
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std::vector<std::unique_ptr<CoordinateSequence>>& holeRings);
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void node();
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bool isShellNoded();
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bool isHoleNoded(std::size_t i);
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std::unique_ptr<CoordinateSequence> getNodedShell();
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std::unique_ptr<CoordinateSequence> getNodedHole(std::size_t i);
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std::vector<bool>& getHolesTouching();
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private:
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// Members
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std::vector<bool> isHoleTouching;
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std::map<NodedSegmentString*, std::size_t> nodedRingIndexes;
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std::vector<std::unique_ptr<NodedSegmentString>> nodedRings;
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// Classes
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class NodeAdder;
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friend class PolygonNoder::NodeAdder;
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// Methods
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NodedSegmentString*
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createNodedSegString(std::unique_ptr<CoordinateSequence>& ringPts, std::size_t i);
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void createNodedSegmentStrings(
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std::unique_ptr<CoordinateSequence>& shellRing,
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std::vector<std::unique_ptr<CoordinateSequence>>& holeRings);
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/* Turn off copy constructors for MSVC */
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PolygonNoder(const PolygonNoder&) = delete;
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PolygonNoder& operator=(const PolygonNoder&) = delete;
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};
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} // namespace geos.triangulate.polygon
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} // namespace geos.triangulate
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} // namespace geos
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