152 lines
3.9 KiB
C++
152 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) 2011 Sandro Santilli <strk@kbt.io>
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* Copyright (C) 2001-2002 Vivid Solutions Inc.
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* Copyright (C) 2005 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: geom/LineString.java r320 (JTS-1.12)
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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/geom/Geometry.h> // for inheritance
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#include <geos/geom/CoordinateSequence.h> // for proper use of unique_ptr<>
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#include <geos/geom/Envelope.h> // for proper use of unique_ptr<>
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#include <geos/geom/Dimension.h> // for Dimension::DimensionType
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#include <geos/geom/SimpleCurve.h>
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#include <string>
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#include <vector>
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#include <memory> // for unique_ptr
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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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namespace geos {
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namespace geom {
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class Coordinate;
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class CoordinateSequenceFilter;
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}
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}
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namespace geos {
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namespace geom { // geos::geom
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/**
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* Models an OGC-style <code>LineString</code>.
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*
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* A LineString consists of a sequence of two or more vertices,
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* along with all points along the linearly-interpolated curves
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* (line segments) between each
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* pair of consecutive vertices.
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* Consecutive vertices may be equal.
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* The line segments in the line may intersect each other (in other words,
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* the linestring may "curl back" in itself and self-intersect).
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* Linestrings with exactly two identical points are invalid.
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*
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* A linestring must have either 0 or 2 or more points.
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* If these conditions are not met, the constructors throw
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* an {@link util::IllegalArgumentException}.
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*/
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class GEOS_DLL LineString: public SimpleCurve {
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public:
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friend class GeometryFactory;
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/// A vector of const LineString pointers
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typedef std::vector<const LineString*> ConstVect;
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~LineString() override;
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/**
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* \brief
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* Creates and returns a full copy of this {@link LineString} object
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* (including all coordinates contained by it)
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*
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* @return A clone of this instance
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*/
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std::unique_ptr<LineString> clone() const
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{
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return std::unique_ptr<LineString>(cloneImpl());
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}
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std::string getGeometryType() const override;
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GeometryTypeId getGeometryTypeId() const override;
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double getLength() const override;
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bool isCurved() const override {
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return false;
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}
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/**
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* Creates a LineString whose coordinates are in the reverse
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* order of this object's
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*
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* @return a LineString with coordinates in the reverse order
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*/
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std::unique_ptr<LineString> reverse() const { return std::unique_ptr<LineString>(reverseImpl()); }
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protected:
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LineString(const LineString& ls);
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/// \brief
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/// Constructs a LineString taking ownership the
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/// given CoordinateSequence.
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LineString(CoordinateSequence::Ptr && pts,
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const GeometryFactory& newFactory);
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LineString* cloneImpl() const override { return new LineString(*this); }
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LineString* reverseImpl() const override;
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int
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getSortIndex() const override
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{
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return SORTINDEX_LINESTRING;
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};
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void geometryChangedAction() override
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{
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envelope = computeEnvelopeInternal(true);
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}
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private:
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void validateConstruction();
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};
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struct GEOS_DLL LineStringLT {
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bool
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operator()(const LineString* ls1, const LineString* ls2) const
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{
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return ls1->compareTo(ls2) < 0;
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}
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};
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} // namespace geos::geom
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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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