geos::index::bintree::Bintree Class Reference

A BinTree (or "Binary Interval Tree") is a 1-dimensional version of a quadtree. More...

#include <Bintree.h>

Public Member Functions
int	depth ()
int	size ()
int	nodeSize ()
void	insert (Interval *itemInterval, void *item)
std::vector< void * > *	iterator ()
std::vector< void * > *	query (double x)
std::vector< void * > *	query (Interval *interval)
void	query (Interval *interval, std::vector< void * > *foundItems)

Static Public Member Functions
static Interval *	ensureExtent (const Interval *itemInterval, double minExtent)
	Ensure that the Interval for the inserted item has non-zero extents.

Detailed Description

A BinTree (or "Binary Interval Tree") is a 1-dimensional version of a quadtree.

It indexes 1-dimensional intervals (which of course may be the projection of 2-D objects on an axis). It supports range searching (where the range may be a single point).

This implementation does not require specifying the extent of the inserted items beforehand. It will automatically expand to accommodate any extent of dataset.

This index is different to the "Interval Tree of Edelsbrunner" or the "Segment Tree of Bentley".

Member Function Documentation

ensureExtent()

static Interval * geos::index::bintree::Bintree::ensureExtent ( const Interval *  itemInterval, double  minExtent  )

static

Ensure that the Interval for the inserted item has non-zero extents.

Use the current minExtent to pad it, if necessary.

Note

In GEOS this function always return a newly allocated object with ownership transferred to caller. TODO: change this ?

Parameters

itemInterval	source interval, ownership left to caller, no references hold
minExtent	minimal extent

insert()

void geos::index::bintree::Bintree::insert	(	Interval *	itemInterval,
		void *	item
	)

Parameters

itemInterval	Ownership left to caller, NO reference hold by this class.
item	Ownership left to caller, reference kept by this class.

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

• Bintree.h