geos::precision::CommonBitsOp Class Reference

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.
	CommonBitsOp (bool nReturnToOriginalPrecision)
	Creates a new instance of class, specifying whether the result geom::Geometrys should be reshifted.
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.
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.
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.
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.
std::unique_ptr< geom::Geometry >	buffer (const geom::Geometry *geom0, double distance)
	Computes the buffer a geometry, using enhanced precision.
std::unique_ptr< geom::Geometry >	computeResultPrecision (std::unique_ptr< geom::Geometry > result)
	If required, returning the result to the original precision if required.

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.

Constructor & Destructor Documentation

CommonBitsOp()

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

buffer()

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.

computeResultPrecision()

std::unique_ptr< geom::Geometry > geos::precision::CommonBitsOp::computeResultPrecision

(

std::unique_ptr< geom::Geometry >

result

)

If required, returning the result to the original 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

difference()

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.

intersection()

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.

symDifference()

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.

Union()

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.

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

• CommonBitsOp.h