Class Node

Inheritance
object
GraphComponent
Node
RelateNode
Inherited Members
Namespace: NetTopologySuite.GeometriesGraph
Assembly: NetTopologySuite.dll
Syntax
public class Node : GraphComponent

Constructors

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Node(Coordinate, EdgeEndStar)

Declaration
public Node(Coordinate coord, EdgeEndStar edges)
Parameters
Type Name Description
Coordinate coord
EdgeEndStar edges

Properties

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Coordinate

Gets a value indicating the position of this

Declaration
public override Coordinate Coordinate { get; protected set; }
Property Value
Type Description
Coordinate

The position of this Node
Overrides
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Edges

Gets a value indicating the EdgeEndStar of this Node

Declaration
public EdgeEndStar Edges { get; protected set; }
Property Value
Type Description
EdgeEndStar

The EdgeEndStar of this Node
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IsIsolated

An isolated component is one that does not intersect or touch any other component. This is the case if the label has valid locations for only a single Geometry.

Declaration
public override bool IsIsolated { get; }
Property Value
Type Description
bool

true if this component is isolated.
Overrides

Methods

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Add(EdgeEnd)

Add the edge to the list of edges at this node.

Declaration
public void Add(EdgeEnd e)
Parameters
Type Name Description
EdgeEnd e

An EdgeEnd
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ComputeIM(IntersectionMatrix)

Compute the contribution to an IM for this component.

Declaration
public override void ComputeIM(IntersectionMatrix im)
Parameters
Type Name Description
IntersectionMatrix im

An IntersectionMatrix
Overrides
Remarks

Basic nodes do not compute IMs.

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ComputeMergedLocation(Label, int)

The location for a given eltIndex for a node will be one of { Null, Interior, Boundary }. A node may be on both the boundary and the interior of a point; in this case, the rule is that the node is considered to be in the boundary. The merged location is the maximum of the two input values.

Declaration
public Location ComputeMergedLocation(Label label2, int eltIndex)
Parameters
Type Name Description
Label label2
int eltIndex
Returns
Type Description
Location
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IsIncidentEdgeInResult()

Tests whether any incident edge is flagged as being in the result. This test can be used to determine if the node is in the result, since if any incident edge is in the result, the node must be in the result as well.

Declaration
public bool IsIncidentEdgeInResult()
Returns
Type Description
bool

true if any incident edge in the in the result
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MergeLabel(Label)

To merge labels for two nodes, the merged location for each LabelElement is computed. The location for the corresponding node LabelElement is set to the result, as long as the location is non-null.

Declaration
public void MergeLabel(Label label)
Parameters
Type Name Description
Label label

The Label to merge
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MergeLabel(Node)

Merges n's Label with this Node's Label.

Declaration
public void MergeLabel(Node n)
Parameters
Type Name Description
Node n

A Node
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SetLabel(int, Location)

Declaration
public void SetLabel(int argIndex, Location onLocation)
Parameters
Type Name Description
int argIndex
Location onLocation
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SetLabelBoundary(int)

Updates the label of a node to BOUNDARY, obeying the mod-2 boundaryDetermination rule.

Declaration
public void SetLabelBoundary(int argIndex)
Parameters
Type Name Description
int argIndex

An index for a TopologyLocation (0 or 1)
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ToString()

Declaration
public override string ToString()
Returns
Type Description
string
Overrides
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Write(TextWriter)

Declaration
public void Write(TextWriter outstream)
Parameters
Type Name Description
TextWriter outstream