90 lines
2.7 KiB
C
90 lines
2.7 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) 2009 Sandro Santilli <strk@kbt.io>
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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/BasicSegmentString.java rev. 1.1 (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/noding/BasicSegmentString.h>
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#include <geos/noding/Octant.h>
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#include <geos/noding/SegmentString.h> // for inheritance
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#include <geos/geom/CoordinateSequence.h> // for inlines (size())
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#include <vector>
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// Forward declarations
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namespace geos {
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namespace noding { // geos.noding
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/** \brief
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* Represents a list of contiguous line segments, and supports noding the segments.
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*
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* The line segments are represented by an array of [Coordinates](@ref geom::Coordinate).
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* Intended to optimize the noding of contiguous segments by reducing the number
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* of allocated objects. SegmentStrings can carry a context object, which is
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* useful for preserving topological or parentage information.
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* All noded substrings are initialized with the same context object.
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*/
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class GEOS_DLL BasicSegmentString : public SegmentString {
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public:
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/// \brief Construct a BasicSegmentString.
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///
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/// @param newPts CoordinateSequence representing the string, externally owned
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/// @param newContext the context associated to this SegmentString
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///
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BasicSegmentString(geom::CoordinateSequence* newPts,
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const void* newContext)
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:
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SegmentString(newContext, newPts)
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{}
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~BasicSegmentString() override
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{}
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// see dox in SegmentString.h
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std::ostream& print(std::ostream& os) const override;
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/** \brief
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* Gets the octant of the segment starting at vertex index.
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*
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* @param index the index of the vertex starting the segment.
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* Must not be the last index in the vertex list
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* @return the octant of the segment at the vertex
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*/
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int getSegmentOctant(std::size_t index) const
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{
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if(index >= size() - 1) {
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return -1;
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}
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return Octant::octant(getCoordinate(index), getCoordinate(index + 1));
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};
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private:
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// Declare type as noncopyable
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BasicSegmentString(const BasicSegmentString& other) = delete;
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BasicSegmentString& operator=(const BasicSegmentString& rhs) = delete;
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};
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} // namespace geos.noding
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} // namespace geos
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