Provides versions of Geometry spatial functions which use common bit removal to reduce the likelihood of robustness problems. More...

#include <CommonBitsOp.h>

Public Member Functions
	CommonBitsOp ()
	Creates a new instance of class, which reshifts result Geometry. More...

	CommonBitsOp (bool nReturnToOriginalPrecision)
	Creates a new instance of class, specifying whether the result geom::Geometrys should be reshifted. More...

std::unique_ptr< geom::Geometry >	intersection (const geom::Geometry geom0, const geom::Geometry geom1)
	Computes the set-theoretic intersection of two Geometry, using enhanced precision. More...

std::unique_ptr< geom::Geometry >	Union (const geom::Geometry geom0, const geom::Geometry geom1)
	Computes the set-theoretic union of two Geometry, using enhanced precision. More...

std::unique_ptr< geom::Geometry >	difference (const geom::Geometry geom0, const geom::Geometry geom1)
	Computes the set-theoretic difference of two Geometry, using enhanced precision. More...

std::unique_ptr< geom::Geometry >	symDifference (const geom::Geometry geom0, const geom::Geometry geom1)
	Computes the set-theoretic symmetric difference of two geometries, using enhanced precision. More...

std::unique_ptr< geom::Geometry >	buffer (const geom::Geometry *geom0, double distance)
	Computes the buffer a geometry, using enhanced precision. More...

std::unique_ptr< geom::Geometry >	computeResultPrecision (std::unique_ptr< geom::Geometry > result)
	If required, returning the result to the orginal precision if required. More...

Private Member Functions
std::unique_ptr< geom::Geometry >	removeCommonBits (const geom::Geometry *geom0)
	Computes a copy of the input Geometry with the calculated common bits removed from each coordinate. More...

void	removeCommonBits (const geom::Geometry geom0, const geom::Geometry geom1, std::unique_ptr< geom::Geometry > &rgeom0, std::unique_ptr< geom::Geometry > &rgeom1)

Private Attributes
bool	returnToOriginalPrecision

std::unique_ptr< CommonBitsRemover >	cbr

Detailed Description

Provides versions of Geometry spatial functions which use common bit removal to reduce the likelihood of robustness problems.

In the current implementation no rounding is performed on the reshifted result geometry, which means that it is possible that the returned Geometry is invalid. Client classes should check the validity of the returned result themselves.

Definition at line 50 of file CommonBitsOp.h.

Constructor & Destructor Documentation

geos::precision::CommonBitsOp::CommonBitsOp ( )

Creates a new instance of class, which reshifts result Geometry.

geos::precision::CommonBitsOp::CommonBitsOp ( bool nReturnToOriginalPrecision )

Creates a new instance of class, specifying whether the result geom::Geometrys should be reshifted.

Parameters

nReturnToOriginalPrecision

Member Function Documentation

std::unique_ptr<geom::Geometry> geos::precision::CommonBitsOp::buffer	(	const geom::Geometry *	geom0,
		double	distance
	)

Computes the buffer a geometry, using enhanced precision.

Parameters

geom0	the Geometry to buffer
distance	the buffer distance

Returns: the Geometry representing the buffer of the input Geometry.

std::unique_ptr<geom::Geometry> geos::precision::CommonBitsOp::computeResultPrecision ( std::unique_ptr< geom::Geometry > result )

If required, returning the result to the orginal precision if required.

In this current implementation, no rounding is performed on the reshifted result geometry, which means that it is possible that the returned Geometry is invalid.

Parameters

result the result Geometry to modify

Returns: the result Geometry with the required precision

std::unique_ptr<geom::Geometry> geos::precision::CommonBitsOp::difference	(	const geom::Geometry *	geom0,
		const geom::Geometry *	geom1
	)

Computes the set-theoretic difference of two Geometry, using enhanced precision.

Parameters

geom0	the first Geometry
geom1	the second Geometry, to be subtracted from the first

Returns: the Geometry representing the set-theoretic difference of the input Geometries.

std::unique_ptr<geom::Geometry> geos::precision::CommonBitsOp::intersection	(	const geom::Geometry *	geom0,
		const geom::Geometry *	geom1
	)

Computes the set-theoretic intersection of two Geometry, using enhanced precision.

Parameters

geom0	the first Geometry
geom1	the second Geometry

Returns: the Geometry representing the set-theoretic intersection of the input Geometries.

std::unique_ptr<geom::Geometry> geos::precision::CommonBitsOp::removeCommonBits ( const geom::Geometry * geom0 )

private

Computes a copy of the input Geometry with the calculated common bits removed from each coordinate.

Parameters

geom0 the Geometry to remove common bits from

Returns: a copy of the input Geometry with common bits removed (caller takes responsibility of its deletion)

void geos::precision::CommonBitsOp::removeCommonBits	(	const geom::Geometry *	geom0,
		const geom::Geometry *	geom1,
		std::unique_ptr< geom::Geometry > &	rgeom0,
		std::unique_ptr< geom::Geometry > &	rgeom1
	)

private

std::unique_ptr<geom::Geometry> geos::precision::CommonBitsOp::symDifference	(	const geom::Geometry *	geom0,
		const geom::Geometry *	geom1
	)

Computes the set-theoretic symmetric difference of two geometries, using enhanced precision.

Parameters

geom0	the first Geometry
geom1	the second Geometry

Returns: the Geometry representing the set-theoretic symmetric difference of the input Geometries.

std::unique_ptr<geom::Geometry> geos::precision::CommonBitsOp::Union	(	const geom::Geometry *	geom0,
		const geom::Geometry *	geom1
	)

Computes the set-theoretic union of two Geometry, using enhanced precision.

Parameters

geom0	the first Geometry
geom1	the second Geometry

Returns: the Geometry representing the set-theoretic union of the input Geometries.

Member Data Documentation

std::unique_ptr<CommonBitsRemover> geos::precision::CommonBitsOp::cbr

private

Definition at line 56 of file CommonBitsOp.h.

bool geos::precision::CommonBitsOp::returnToOriginalPrecision

private

Definition at line 54 of file CommonBitsOp.h.

The documentation for this class was generated from the following file:

CommonBitsOp.h

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation