geos::operation::geounion::CascadedUnion Class Reference

Provides an efficient method of unioning a collection of Geometries. More...

#include <CascadedUnion.h>

Public Member Functions
	CascadedUnion (const std::vector< geom::Geometry * > *geoms)
geom::Geometry *	Union ()

Static Public Member Functions
static geom::Geometry *	Union (std::vector< geom::Geometry * > *geoms)
template<class T>
static geom::Geometry *	Union (T start, T end)

Detailed Description

Provides an efficient method of unioning a collection of Geometries.

This algorithm is more robust than the simple iterated approach of repeatedly unioning each geometry to a result geometry.

Constructor & Destructor Documentation

CascadedUnion()

geos::operation::geounion::CascadedUnion::CascadedUnion ( const std::vector< geom::Geometry * > * geoms )

inline

Creates a new instance to union the given collection of Geometrys.

Parameters

geoms

a collection of Geometryal Geometrys ownership of elements and vector are left to caller.

Member Function Documentation

Union() [1/3]

geom::Geometry * geos::operation::geounion::CascadedUnion::Union

(

)

Computes the union of the input geometries.

Returns

the union of the input geometries

null if no input geometries were provided

Union() [2/3]

geom::Geometry * geos::operation::geounion::CascadedUnion::Union ( std::vector< geom::Geometry * > * geoms )

static

Computes the union of a collection of Geometrys.

Parameters

geoms

a collection of Geometrys. ownership of elements and vector are left to caller.

Referenced by Union().

Union() [3/3]

template<class T>

geom::Geometry * geos::operation::geounion::CascadedUnion::Union ( T start, T end )

inlinestatic

Computes the union of a set of Geometrys.

Template Parameters

T	an iterator yelding something castable to const Geometry *

Parameters

start	start iterator
end	end iterator

References Union().

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

• CascadedUnion.h