Class EdgeRing

Inheritance

object

EdgeRing

MaximalEdgeRing

MinimalEdgeRing

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: NetTopologySuite.GeometriesGraph

Assembly: NetTopologySuite.dll

Syntax

public abstract class EdgeRing

Constructors

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EdgeRing(DirectedEdge, GeometryFactory)

Creates an instance of this class using the provided start and geometryFactory.

Declaration

protected EdgeRing(DirectedEdge start, GeometryFactory geometryFactory)

Parameters

Type	Name	Description
DirectedEdge	start	The start `DirectedEdge` for the `EdgeRing`
GeometryFactory	geometryFactory	A `GeometryFactory`

Fields

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startDe

The directed edge which starts the list of edges for this EdgeRing.

Declaration

protected DirectedEdge startDe

Field Value

Type	Description
DirectedEdge

Properties

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Edges

Returns the list of DirectedEdges that make up this EdgeRing.

Declaration

public IList<DirectedEdge> Edges { get; }

Property Value

Type	Description
IList<DirectedEdge>	A list of `DirectedEdge`s

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GeometryFactory

A GeometryFactory to use.

Declaration

protected GeometryFactory GeometryFactory { get; }

Property Value

Type	Description
GeometryFactory

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IsHole

Gets a value indicating if this EdgeRing is a hole of a Polygon

Declaration

public bool IsHole { get; }

Property Value

Type	Description
bool

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IsIsolated

Gets a value indicating if this EdgeRing is isolated

Declaration

public bool IsIsolated { get; }

Property Value

Type	Description
bool

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IsShell

Declaration

public bool IsShell { get; }

Property Value

Type	Description
bool

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Label

Gets a value indicating the topological relationship of this EdgeRing

Declaration

public Label Label { get; }

Property Value

Type	Description
Label

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LinearRing

Gets the geometry representation of this EdgeRing

Declaration

public LinearRing LinearRing { get; }

Property Value

Type	Description
LinearRing

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MaxNodeDegree

Declaration

public int MaxNodeDegree { get; }

Property Value

Type	Description
int

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Shell

Declaration

public EdgeRing Shell { get; set; }

Property Value

Type	Description
EdgeRing

Methods

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AddHole(EdgeRing)

Add an EdgeRing representing a hole

Declaration

public void AddHole(EdgeRing ring)

Parameters

Type	Name	Description
EdgeRing	ring	The ring to add

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AddPoints(Edge, bool, bool)

Declaration

protected void AddPoints(Edge edge, bool isForward, bool isFirstEdge)

Parameters

Type	Name	Description
Edge	edge
bool	isForward
bool	isFirstEdge

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ComputePoints(DirectedEdge)

Collect all the points from the DirectedEdges of this ring into a contiguous list.

Declaration

protected void ComputePoints(DirectedEdge start)

Parameters

Type	Name	Description
DirectedEdge	start

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ComputeRing()

Compute a LinearRing from the point list previously collected. Test if the ring is a hole (i.e. if it is CCW) and set the hole flag accordingly.

Declaration

public void ComputeRing()

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ContainsPoint(Coordinate)

This method will cause the ring to be computed. It will also check any holes, if they have been assigned.

Declaration

public bool ContainsPoint(Coordinate p)

Parameters

Type	Name	Description
Coordinate	p	The point to test

Returns

Type	Description
bool	`true` if the ring contains point `p`

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GetCoordinate(int)

Access a Coordinate of this EdgeRing by its index.

Declaration

public Coordinate GetCoordinate(int i)

Parameters

Type	Name	Description
int	i	The index of the `Coordinate`

Returns

Type	Description
Coordinate	The `Coordinate` at index `i`

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GetNext(DirectedEdge)

Declaration

public abstract DirectedEdge GetNext(DirectedEdge de)

Parameters

Type	Name	Description
DirectedEdge	de

Returns

Type	Description
DirectedEdge

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MergeLabel(Label)

Declaration

protected void MergeLabel(Label deLabel)

Parameters

Type	Name	Description
Label	deLabel

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MergeLabel(Label, int)

Merge the RHS label from a DirectedEdge into the label for this EdgeRing. The DirectedEdge label may be null. This is acceptable - it results from a node which is NOT an intersection node between the Geometries (e.g. the end node of a LinearRing). In this case the DirectedEdge label does not contribute any information to the overall labelling, and is simply skipped.

Declaration

protected void MergeLabel(Label deLabel, int geomIndex)

Parameters

Type	Name	Description
Label	deLabel
int	geomIndex

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SetEdgeRing(DirectedEdge, EdgeRing)

Declaration

public abstract void SetEdgeRing(DirectedEdge de, EdgeRing er)

Parameters

Type	Name	Description
DirectedEdge	de
EdgeRing	er

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SetInResult()

Declaration

public void SetInResult()

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ToPolygon(GeometryFactory)

Create the Polygon described by this EdgeRing

Declaration

public Polygon ToPolygon(GeometryFactory geometryFactory)

Parameters

Type	Name	Description
GeometryFactory	geometryFactory	The `GeometryFactory` to use.

Returns

Type	Description
Polygon	A `Polygon`