geos::operation::overlayng::OverlayEdgeRing Class Reference

#include <OverlayEdgeRing.h>

Collaboration diagram for geos::operation::overlayng::OverlayEdgeRing:

Public Member Functions
	OverlayEdgeRing (OverlayEdge *start, const GeometryFactory *geometryFactory)
std::unique_ptr< LinearRing >	getRing ()
const LinearRing *	getRingPtr () const
bool	isHole () const
void	setShell (OverlayEdgeRing *p_shell)
bool	hasShell () const
const OverlayEdgeRing *	getShell () const
void	addHole (OverlayEdgeRing *ring)
bool	isInRing (const Coordinate &pt)
const Coordinate &	getCoordinate ()
std::unique_ptr< Polygon >	toPolygon (const GeometryFactory *factory)
OverlayEdge *	getEdge ()
OverlayEdgeRing *	findEdgeRingContaining (std::vector< OverlayEdgeRing * > &erList)

Private Member Functions
void	computeRingPts (OverlayEdge *start, CoordinateArraySequence &pts)
void	computeRing (const CoordinateArraySequence &ringPts, const GeometryFactory *geometryFactory)
const CoordinateArraySequence &	getCoordinates ()
PointOnGeometryLocator *	getLocator ()
void	closeRing (CoordinateArraySequence &pts)

Private Attributes
OverlayEdge *	startEdge
std::unique_ptr< LinearRing >	ring
bool	m_isHole
CoordinateArraySequence	ringPts
std::unique_ptr< IndexedPointInAreaLocator >	locator
OverlayEdgeRing *	shell
std::vector< OverlayEdgeRing * >	holes

Detailed Description

Definition at line 51 of file OverlayEdgeRing.h.

Constructor & Destructor Documentation

geos::operation::overlayng::OverlayEdgeRing::OverlayEdgeRing	(	OverlayEdge *	start,
		const GeometryFactory *	geometryFactory
	)

Member Function Documentation

void geos::operation::overlayng::OverlayEdgeRing::addHole

(

OverlayEdgeRing *

ring

)

void geos::operation::overlayng::OverlayEdgeRing::closeRing ( CoordinateArraySequence &  pts )

private

void geos::operation::overlayng::OverlayEdgeRing::computeRing ( const CoordinateArraySequence &  ringPts, const GeometryFactory *  geometryFactory  )

private

void geos::operation::overlayng::OverlayEdgeRing::computeRingPts ( OverlayEdge *  start, CoordinateArraySequence &  pts  )

private

OverlayEdgeRing* geos::operation::overlayng::OverlayEdgeRing::findEdgeRingContaining

(

std::vector< OverlayEdgeRing * > &

erList

)

Finds the innermost enclosing shell OverlayEdgeRing containing this OverlayEdgeRing, if any. The innermost enclosing ring is the smallest enclosing ring. The algorithm used depends on the fact that: ring A contains ring B iff envelope(ring A) contains envelope(ring B)

This routine is only safe to use if the chosen point of the hole is known to be properly contained in a shell (which is guaranteed to be the case if the hole does not touch its shell)

To improve performance of this function the caller should make the passed shellList as small as possible (e.g. by using a spatial index filter beforehand).

Returns

containing EdgeRing, if there is one or null if no containing EdgeRing is found

const Coordinate& geos::operation::overlayng::OverlayEdgeRing::getCoordinate

(

)

const CoordinateArraySequence& geos::operation::overlayng::OverlayEdgeRing::getCoordinates ( )

private

Computes the list of coordinates which are contained in this ring. The coordinates are computed once only and cached.

Returns

an array of the Coordinates in this ring

OverlayEdge* geos::operation::overlayng::OverlayEdgeRing::getEdge

(

)

PointOnGeometryLocator* geos::operation::overlayng::OverlayEdgeRing::getLocator ( )

private

std::unique_ptr<LinearRing> geos::operation::overlayng::OverlayEdgeRing::getRing

(

)

const LinearRing* geos::operation::overlayng::OverlayEdgeRing::getRingPtr

(

)

const

const OverlayEdgeRing* geos::operation::overlayng::OverlayEdgeRing::getShell

(

)

const

Gets the shell for this ring. The shell is the ring itself if it is not a hole, otherwise its parent shell.

Returns

the shell for this ring

bool geos::operation::overlayng::OverlayEdgeRing::hasShell

(

)

const

Tests whether this ring has a shell assigned to it.

Returns

true if the ring has a shell

bool geos::operation::overlayng::OverlayEdgeRing::isHole

(

)

const

Tests whether this ring is a hole.

Returns

true if this ring is a hole

bool geos::operation::overlayng::OverlayEdgeRing::isInRing

(

const Coordinate &

pt

)

void geos::operation::overlayng::OverlayEdgeRing::setShell

(

OverlayEdgeRing *

p_shell

)

Sets the containing shell ring of a ring that has been determined to be a hole.

Parameters

shell

the shell ring

std::unique_ptr<Polygon> geos::operation::overlayng::OverlayEdgeRing::toPolygon

(

const GeometryFactory *

factory

)

Computes the Polygon formed by this ring and any contained holes.

Returns

the Polygon formed by this ring and its holes.

Member Data Documentation

std::vector<OverlayEdgeRing*> geos::operation::overlayng::OverlayEdgeRing::holes

private

Definition at line 63 of file OverlayEdgeRing.h.

std::unique_ptr<IndexedPointInAreaLocator> geos::operation::overlayng::OverlayEdgeRing::locator

private

Definition at line 60 of file OverlayEdgeRing.h.

bool geos::operation::overlayng::OverlayEdgeRing::m_isHole

private

Definition at line 58 of file OverlayEdgeRing.h.

std::unique_ptr<LinearRing> geos::operation::overlayng::OverlayEdgeRing::ring

private

Definition at line 57 of file OverlayEdgeRing.h.

CoordinateArraySequence geos::operation::overlayng::OverlayEdgeRing::ringPts

private

Definition at line 59 of file OverlayEdgeRing.h.

OverlayEdgeRing* geos::operation::overlayng::OverlayEdgeRing::shell

private

Definition at line 61 of file OverlayEdgeRing.h.

OverlayEdge* geos::operation::overlayng::OverlayEdgeRing::startEdge

private

Definition at line 56 of file OverlayEdgeRing.h.

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

• OverlayEdgeRing.h