geos::operation::buffer::OffsetSegmentString Class Reference

#include <OffsetSegmentString.h>

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Public Member Functions
	OffsetSegmentString ()
	~OffsetSegmentString ()
void	reset ()
void	setPrecisionModel (const geom::PrecisionModel *nPrecisionModel)
void	setMinimumVertexDistance (double nMinVertexDistance)
void	addPt (const geom::Coordinate &pt)
void	addPts (const geom::CoordinateSequence &pts, bool isForward)
void	closeRing ()
geom::CoordinateSequence *	getCoordinates ()
size_t	size () const

Private Member Functions
bool	isRedundant (const geom::Coordinate &pt) const
	Tests whether the given point is redundant relative to the previous point in the list (up to tolerance) More...
	OffsetSegmentString (const OffsetSegmentString &)=delete
OffsetSegmentString &	operator= (const OffsetSegmentString &)=delete

Private Attributes
geom::CoordinateArraySequence *	ptList
const geom::PrecisionModel *	precisionModel
double	minimumVertexDistance
	The distance below which two adjacent points on the curve are considered to be coincident. More...

Friends
std::ostream &	operator<< (std::ostream &os, const OffsetSegmentString &node)

Detailed Description

A dynamic list of the vertices in a constructed offset curve.

Automatically removes close vertices which are closer than a given tolerance.

Author

Martin Davis

Definition at line 43 of file OffsetSegmentString.h.

Constructor & Destructor Documentation

geos::operation::buffer::OffsetSegmentString::OffsetSegmentString ( const OffsetSegmentString &  )

privatedelete

geos::operation::buffer::OffsetSegmentString::OffsetSegmentString ( )

inline

Definition at line 87 of file OffsetSegmentString.h.

Referenced by isRedundant().

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geos::operation::buffer::OffsetSegmentString::~OffsetSegmentString ( )

inline

Definition at line 95 of file OffsetSegmentString.h.

References ptList.

Member Function Documentation

void geos::operation::buffer::OffsetSegmentString::addPt ( const geom::Coordinate &  pt )

inline

Definition at line 127 of file OffsetSegmentString.h.

References geos::geom::CoordinateArraySequence::add(), isRedundant(), and geos::geom::PrecisionModel::makePrecise().

Referenced by addPts().

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void geos::operation::buffer::OffsetSegmentString::addPts ( const geom::CoordinateSequence &  pts, bool  isForward  )

inline

Definition at line 144 of file OffsetSegmentString.h.

References addPt(), and geos::geom::CoordinateSequence::size().

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void geos::operation::buffer::OffsetSegmentString::closeRing ( )

inline

Check that points are a ring

add the startpoint again if they are not

Definition at line 162 of file OffsetSegmentString.h.

References geos::geom::CoordinateArraySequence::add(), geos::geom::CoordinateSequence::back(), geos::geom::Coordinate::equals(), geos::geom::CoordinateSequence::front(), and geos::geom::CoordinateSequence::size().

Referenced by getCoordinates().

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geom::CoordinateSequence* geos::operation::buffer::OffsetSegmentString::getCoordinates ( void  )

inline

Get coordinates by taking ownership of them

After this call, the coordinates reference in this object are dropped. Calling twice will segfault...

FIXME: refactor memory management of this

Definition at line 185 of file OffsetSegmentString.h.

References closeRing(), and ptList.

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bool geos::operation::buffer::OffsetSegmentString::isRedundant ( const geom::Coordinate &  pt ) const

inlineprivate

Tests whether the given point is redundant relative to the previous point in the list (up to tolerance)

Parameters

pt

Returns

true if the point is redundant

Definition at line 67 of file OffsetSegmentString.h.

References geos::geom::CoordinateSequence::back(), geos::geom::Coordinate::distance(), OffsetSegmentString(), operator<<, operator=(), and geos::geom::CoordinateSequence::size().

Referenced by addPt().

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OffsetSegmentString& geos::operation::buffer::OffsetSegmentString::operator= ( const OffsetSegmentString &  )

privatedelete

Referenced by isRedundant().

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void geos::operation::buffer::OffsetSegmentString::reset ( )

inline

Definition at line 101 of file OffsetSegmentString.h.

References geos::geom::CoordinateArraySequence::clear().

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void geos::operation::buffer::OffsetSegmentString::setMinimumVertexDistance ( double  nMinVertexDistance )

inline

Definition at line 121 of file OffsetSegmentString.h.

void geos::operation::buffer::OffsetSegmentString::setPrecisionModel ( const geom::PrecisionModel *  nPrecisionModel )

inline

Definition at line 115 of file OffsetSegmentString.h.

size_t geos::operation::buffer::OffsetSegmentString::size ( ) const

inline

Definition at line 194 of file OffsetSegmentString.h.

References geos::geom::CoordinateSequence::size().

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Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  os, const OffsetSegmentString &  node  )

friend

Definition at line 202 of file OffsetSegmentString.h.

Referenced by isRedundant().

Member Data Documentation

double geos::operation::buffer::OffsetSegmentString::minimumVertexDistance

private

The distance below which two adjacent points on the curve are considered to be coincident.

This is chosen to be a small fraction of the offset distance.

Definition at line 57 of file OffsetSegmentString.h.

const geom::PrecisionModel* geos::operation::buffer::OffsetSegmentString::precisionModel

private

Definition at line 49 of file OffsetSegmentString.h.

geom::CoordinateArraySequence* geos::operation::buffer::OffsetSegmentString::ptList

private

Definition at line 47 of file OffsetSegmentString.h.

Referenced by getCoordinates(), geos::operation::buffer::operator<<(), and ~OffsetSegmentString().

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The documentation for this class was generated from the following file:

• OffsetSegmentString.h