Class RingClipper

Clips a ring of points to an rectangle. Uses a variant of Cohen-Sutherland clipping.

In general the output is not topologically valid. In particular, the output may contain coincident non-noded line segments along the clip rectangle sides. However, the output is sufficiently well-structured that it can be used as input to the OverlayNG algorithm (which is able to process coincident linework due to the need to handle topology collapse under precision reduction).

Because of the likelihood of creating extraneous line segments along the clipping rectangle sides, this class is not suitable for clipping linestrings.

The clipping envelope should be generated using NetTopologySuite.Operation.OverlayNG.RobustClipEnvelopeComputer, to ensure that intersecting line segments are not perturbed by clipping. This is required to ensure that the overlay of the clipped geometry is robust and correct (i.e. the same as if clipping was not used).

Inheritance

object

RingClipper

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: NetTopologySuite.Operation.OverlayNG

Assembly: NetTopologySuite.dll

Syntax

public sealed class RingClipper

Constructors

RingClipper(Envelope)

Creates a new clipper for the given envelope.

Declaration

public RingClipper(Envelope clipEnv)

Parameters

Type	Name	Description
Envelope	clipEnv	The clipping envelope

Methods

Clip(Coordinate[])

Clips a list of points to the clipping rectangle box.

Declaration

public Coordinate[] Clip(Coordinate[] pts)

Parameters

Type	Name	Description
Coordinate[]	pts	The points of the ring

Returns

Type	Description
Coordinate[]	The points of the clipped ring

See Also

LineLimiter