Class DirectedEdgeStar

A DirectedEdgeStar is an ordered list of outgoing DirectedEdges around a node. It supports labelling the edges as well as linking the edges to form both MaximalEdgeRings and MinimalEdgeRings.

Inheritance
Object
EdgeEndStar
DirectedEdgeStar
Inherited Members
Namespace: NetTopologySuite.GeometriesGraph
Assembly: NetTopologySuite.dll
Syntax
public class DirectedEdgeStar : EdgeEndStar

Properties

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Label

Declaration
public Label Label { get; }
Property Value
Type Description
Label

Methods

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ComputeDepths(DirectedEdge)

Declaration
public void ComputeDepths(DirectedEdge de)
Parameters
Type Name Description
DirectedEdge de
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ComputeLabelling(GeometryGraph[])

Compute the labelling for all dirEdges in this star, as well as the overall labelling.

Declaration
public override void ComputeLabelling(GeometryGraph[] geom)
Parameters
Type Name Description
GeometryGraph[] geom
Overrides
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FindCoveredLineEdges()

Traverse the star of edges, maintaining the current location in the result area at this node (if any). If any L edges are found in the interior of the result, mark them as covered.

Declaration
public void FindCoveredLineEdges()
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GetOutgoingDegree()

Declaration
public int GetOutgoingDegree()
Returns
Type Description
Int32
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GetOutgoingDegree(EdgeRing)

Declaration
public int GetOutgoingDegree(EdgeRing er)
Parameters
Type Name Description
EdgeRing er
Returns
Type Description
Int32
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GetRightmostEdge()

Declaration
public DirectedEdge GetRightmostEdge()
Returns
Type Description
DirectedEdge
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Insert(EdgeEnd)

Insert a directed edge in the list.

Declaration
public override void Insert(EdgeEnd ee)
Parameters
Type Name Description
EdgeEnd ee
Overrides
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LinkAllDirectedEdges()

Declaration
public void LinkAllDirectedEdges()
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LinkMinimalDirectedEdges(EdgeRing)

Declaration
public void LinkMinimalDirectedEdges(EdgeRing er)
Parameters
Type Name Description
EdgeRing er
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LinkResultDirectedEdges()

Traverse the star of DirectedEdges, linking the included edges together. To link two dirEdges, the next pointer for an incoming dirEdge is set to the next outgoing edge. DirEdges are only linked if: they belong to an area (i.e. they have sides) they are marked as being in the result Edges are linked in CCW order (the order they are stored). This means that rings have their face on the Right (in other words, the topological location of the face is given by the RHS label of the DirectedEdge). PRECONDITION: No pair of dirEdges are both marked as being in the result.

Declaration
public void LinkResultDirectedEdges()
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MergeSymLabels()

For each dirEdge in the star, merge the label .

Declaration
public void MergeSymLabels()
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UpdateLabelling(Label)

Update incomplete dirEdge labels from the labeling for the node.

Declaration
public void UpdateLabelling(Label nodeLabel)
Parameters
Type Name Description
Label nodeLabel

The label to apply
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Write(StreamWriter)

Declaration
public override void Write(StreamWriter outstream)
Parameters
Type Name Description
StreamWriter outstream
Overrides