Class PolygonHoleJoiner

Transforms a polygon with holes into a single self-touching (invalid) ring by joining holes to the exterior shell or to another hole with out-and-back line segments. The holes are added in order of their envelopes (leftmost/lowest first). As the result shell develops, a hole may be added to what was originally another hole.

There is no attempt to optimize the quality of the join lines. In particular, holes may be joined by lines longer than is optimal. However, holes which touch the shell or other holes are joined at the touch point.

The class does not require the input polygon to have normal orientation (shell CW and rings CCW). The output ring is always CW.

Inheritance

object

PolygonHoleJoiner

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: NetTopologySuite.Triangulate.Polygon

Assembly: NetTopologySuite.dll

Syntax

public class PolygonHoleJoiner

Constructors

PolygonHoleJoiner(Polygon)

Creates a new hole joiner.

Declaration

public PolygonHoleJoiner(Polygon polygon)

Parameters

Type	Name	Description
Polygon	polygon	The polygon to join

Methods

Compute()

Computes the joined ring

Declaration

public Coordinate[] Compute()

Returns

Type	Description
Coordinate[]	The points in the joined ring

Join(Polygon)

Joins the shell and holes of a polygon and returns the result as sequence of Coordinates.

Declaration

public static Coordinate[] Join(Polygon polygon)

Parameters

Type	Name	Description
Polygon	polygon	The polygon to join

Returns

Type	Description
Coordinate[]	The result coordinates

JoinAsPolygon(Polygon)

Joins the shell and holes of a polygon and returns the result as an (invalid) Polygon.

Declaration

public static Polygon JoinAsPolygon(Polygon polygon)

Parameters

Type	Name	Description
Polygon	polygon	The polygon to join

Returns

Type	Description
Polygon	The result polygon