Class GeometryGraph

A GeometryGraph is a graph that models a given Geometry.

Inheritance

Object

PlanarGraph

GeometryGraph

Inherited Members

PlanarGraph.LinkResultDirectedEdges(IList<Node>)

PlanarGraph.edgeEndList

PlanarGraph.GetEdgeEnumerator()

PlanarGraph.EdgeEnds

PlanarGraph.Edges

PlanarGraph.IsBoundaryNode(Int32, Coordinate)

PlanarGraph.InsertEdge(Edge)

PlanarGraph.Add(EdgeEnd)

PlanarGraph.GetNodeEnumerator()

PlanarGraph.Nodes

PlanarGraph.NodeMap

PlanarGraph.AddNode(Node)

PlanarGraph.AddNode(Coordinate)

PlanarGraph.Find(Coordinate)

PlanarGraph.AddEdges(IList<Edge>)

PlanarGraph.LinkResultDirectedEdges()

PlanarGraph.LinkAllDirectedEdges()

PlanarGraph.FindEdgeEnd(Edge)

PlanarGraph.FindEdge(Coordinate, Coordinate)

PlanarGraph.FindEdgeInSameDirection(Coordinate, Coordinate)

PlanarGraph.WriteEdges(StreamWriter)

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 class GeometryGraph : PlanarGraph

Constructors

GeometryGraph(Int32, Geometry)

Declaration

public GeometryGraph(int argIndex, Geometry parentGeom)

Parameters

Type	Name	Description
Int32	argIndex
Geometry	parentGeom

GeometryGraph(Int32, Geometry, IBoundaryNodeRule)

Declaration

public GeometryGraph(int argIndex, Geometry parentGeom, IBoundaryNodeRule boundaryNodeRule)

Parameters

Type	Name	Description
Int32	argIndex
Geometry	parentGeom
IBoundaryNodeRule	boundaryNodeRule

Properties

BoundaryNodeRule

Gets the IBoundaryNodeRule used with this geometry graph.

Declaration

public IBoundaryNodeRule BoundaryNodeRule { get; }

Property Value

Type	Description
IBoundaryNodeRule

BoundaryNodes

Declaration

public IList<Node> BoundaryNodes { get; }

Property Value

Type	Description
IList<Node>

Geometry

Declaration

public Geometry Geometry { get; }

Property Value

Type	Description
Geometry

HasTooFewPoints

Declaration

public bool HasTooFewPoints { get; }

Property Value

Type	Description
Boolean

InvalidPoint

Declaration

public Coordinate InvalidPoint { get; }

Property Value

Type	Description
Coordinate

Methods

AddEdge(Edge)

Add an Edge computed externally. The label on the Edge is assumed to be correct.

Declaration

public void AddEdge(Edge e)

Parameters

Type	Name	Description
Edge	e	An Edge

AddPoint(Coordinate)

Add a point computed externally. The point is assumed to be a Point Geometry part, which has a location of INTERIOR.

Declaration

public void AddPoint(Coordinate pt)

Parameters

Type	Name	Description
Coordinate	pt	A Coordinate

ComputeEdgeIntersections(GeometryGraph, LineIntersector, Boolean)

Declaration

public SegmentIntersector ComputeEdgeIntersections(GeometryGraph g, LineIntersector li, bool includeProper)

Parameters

Type	Name	Description
GeometryGraph	g
LineIntersector	li
Boolean	includeProper

Returns

Type	Description
SegmentIntersector

ComputeSelfNodes(LineIntersector, Boolean)

Compute self-nodes, taking advantage of the Geometry type to minimize the number of intersection tests. (E.g. rings are not tested for self-intersection, since they are assumed to be valid).

Declaration

public SegmentIntersector ComputeSelfNodes(LineIntersector li, bool computeRingSelfNodes)

Parameters

Type	Name	Description
LineIntersector	li	The LineIntersector to use.
Boolean	computeRingSelfNodes	If false, intersection checks are optimized to not test rings for self-intersection.

Returns

Type	Description
SegmentIntersector	The computed SegmentIntersector, containing information about the intersections found.

ComputeSelfNodes(LineIntersector, Boolean, Boolean)

Compute self-nodes, taking advantage of the Geometry type to minimize the number of intersection tests. (E.g.rings are not tested for self-intersection, since they are assumed to be valid).

Declaration

[Obsolete("Shrot circuiting no longer allowed")]
public SegmentIntersector ComputeSelfNodes(LineIntersector li, bool computeRingSelfNodes, bool isDoneIfProperInt)

Parameters

Type	Name	Description
LineIntersector	li	The LineIntersector to use
Boolean	computeRingSelfNodes	If false, intersection checks are optimized to not test rings for self-intersection
Boolean	isDoneIfProperInt	Short-circuit the intersection computation if a proper intersection is found

Returns

Type	Description
SegmentIntersector

ComputeSplitEdges(IList<Edge>)

Declaration

public void ComputeSplitEdges(IList<Edge> edgelist)

Parameters

Type	Name	Description
IList<Edge>	edgelist

DetermineBoundary(IBoundaryNodeRule, Int32)

Determine boundary

Declaration

public static Location DetermineBoundary(IBoundaryNodeRule boundaryNodeRule, int boundaryCount)

Parameters

Type	Name	Description
IBoundaryNodeRule	boundaryNodeRule	The boundary node rule to apply for determination of the boundary
Int32	boundaryCount	The number of component boundaries that a point occurs in.

Returns

Type	Description
Location	Boundary or Interior

FindEdge(LineString)

Declaration

public Edge FindEdge(LineString line)

Parameters

Type	Name	Description
LineString	line

Returns

Type	Description
Edge

GetBoundaryPoints()

Declaration

public Coordinate[] GetBoundaryPoints()

Returns

Type	Description
Coordinate[]

Locate(Coordinate)

Determines the Location of the given Coordinate in this geometry.

Declaration

public Location Locate(Coordinate pt)

Parameters

Type	Name	Description
Coordinate	pt	The point to test

Returns

Type	Description
Location	The location of the point in the geometry