geos::geom::prep::PreparedLineStringIntersects Class Reference

Computes the intersects spatial relationship predicate for a target PreparedLineString relative to other Geometry classes. More...

#include <PreparedLineStringIntersects.h>

List of all members.

Public Member Functions
	PreparedLineStringIntersects (PreparedLineString &prep)
bool	intersects (const geom::Geometry *g) const
Static Public Member Functions
static bool	intersects (PreparedLineString &prep, const geom::Geometry *geom)
Protected Member Functions
bool	isAnyTestPointInTarget (const geom::Geometry *testGeom) const
Protected Attributes
PreparedLineString &	prepLine

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Detailed Description

Computes the intersects spatial relationship predicate for a target PreparedLineString relative to other Geometry classes.

Uses short-circuit tests and indexing to improve performance.

Author:

Martin Davis

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Constructor & Destructor Documentation

geos::geom::prep::PreparedLineStringIntersects::PreparedLineStringIntersects

(

PreparedLineString &

prep

)

[inline]

Todo:

FIXME - mloskot: Why not taking linestring through const reference?

Referenced by intersects().

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Member Function Documentation

bool geos::geom::prep::PreparedLineStringIntersects::intersects

(

const geom::Geometry *

g

)

const

Tests whether this geometry intersects a given geometry.

Parameters:

geom

the test geometry

Returns:

true if the test geometry intersects

static bool geos::geom::prep::PreparedLineStringIntersects::intersects	(	PreparedLineString &	prep,
		const geom::Geometry *	geom
	)			[inline, static]

This could be optimized by using the segment index on the lineal target. However, it seems like the L/P case would be pretty rare in practice. Computes the intersects predicate between a PreparedLineString and a Geometry.

Parameters:

	prep	the prepared linestring
	geom	a test geometry

Returns:

true if the linestring intersects the geometry

References intersects(), and PreparedLineStringIntersects().

Referenced by intersects().

bool geos::geom::prep::PreparedLineStringIntersects::isAnyTestPointInTarget

(

const geom::Geometry *

testGeom

)

const [protected]

Tests whether any representative point of the test Geometry intersects the target geometry. Only handles test geometries which are Puntal (dimension 0)

Parameters:

geom

a Puntal geometry to test

Returns:

true if any point of the argument intersects the prepared geometry

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

• PreparedLineStringIntersects.h