Class CommonBitsRemover

Namespace

NetTopologySuite.Precision

Assembly

NetTopologySuite.dll

Removes common most-significant mantissa bits from one or more Geometrys.

The CommonBitsRemover "scavenges" precision which is "wasted" by a large displacement of the geometry from the origin. For example, if a small geometry is displaced from the origin by a large distance, the displacement increases the significant figures in the coordinates, but does not affect the relative topology of the geometry. Thus the geometry can be translated back to the origin without affecting its topology. In order to compute the translation without affecting the full precision of the coordinate values, the translation is performed at the bit level by removing the common leading mantissa bits.

If the geometry envelope already contains the origin, the translation procedure cannot be applied. In this case, the common bits value is computed as zero.

If the geometry crosses the Y axis but not the X axis (and mutatis mutandum), the common bits for Y are zero, but the common bits for X are non-zero.

public class CommonBitsRemover

Inheritance

object

CommonBitsRemover

Inherited Members

object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Constructors

CommonBitsRemover()

public CommonBitsRemover()

Properties

CommonCoordinate

The common bits of the Coordinates in the supplied Geometries.

public Coordinate CommonCoordinate { get; }

Property Value

Coordinate

Methods

Add(Geometry)

Add a point to the set of geometries whose common bits are being computed. After this method has executed the common coordinate reflects the common bits of all added geometries.

public void Add(Geometry geom)

Parameters

geom Geometry

A Geometry to test for common bits.

AddCommonBits(Geometry)

Adds the common coordinate bits back into a Geometry. The coordinates of the Geometry are changed.

public void AddCommonBits(Geometry geom)

Parameters

geom Geometry

The Geometry to which to add the common coordinate bits.

RemoveCommonBits(Geometry)

Removes the common coordinate bits from a Geometry. The coordinates of the Geometry are changed.

public Geometry RemoveCommonBits(Geometry geom)

Parameters

geom Geometry

The Geometry from which to remove the common coordinate bits.

Returns

Geometry

The shifted Geometry.