QgsSpatialIndex Class Reference

#include <qgsspatialindex.h>

Public Member Functions
	QgsSpatialIndex ()
	constructor - creates R-tree
	~QgsSpatialIndex ()
	destructor finalizes work with spatial index
bool	insertFeature (QgsFeature &f)
	add feature to index
bool	deleteFeature (QgsFeature &f)
	remove feature from index
QList< QgsFeatureId >	intersects (QgsRectangle rect)
	returns features that intersect the specified rectangle
QList< QgsFeatureId >	nearestNeighbor (QgsPoint point, int neighbors)
	returns nearest neighbors (their count is specified by second parameter)

Protected Member Functions
SpatialIndex::Region	rectToRegion (QgsRectangle rect)
bool	featureInfo (QgsFeature &f, SpatialIndex::Region &r, QgsFeatureId &id)

Private Attributes
SpatialIndex::IStorageManager *	mStorageManager
	storage manager
SpatialIndex::StorageManager::IBuffer *	mStorage
	buffer for index data
SpatialIndex::ISpatialIndex *	mRTree
	R-tree containing spatial index.

Detailed Description

Definition at line 41 of file qgsspatialindex.h.

Constructor & Destructor Documentation

QgsSpatialIndex::QgsSpatialIndex

(

)

constructor - creates R-tree

Definition at line 51 of file qgsspatialindex.cpp.

QgsSpatialIndex::~QgsSpatialIndex

(

)

destructor finalizes work with spatial index

Definition at line 75 of file qgsspatialindex.cpp.

Member Function Documentation

bool QgsSpatialIndex::deleteFeature

(

QgsFeature &

f

)

remove feature from index

Definition at line 134 of file qgsspatialindex.cpp.

References FID_TO_NUMBER.

bool QgsSpatialIndex::featureInfo ( QgsFeature &  f, SpatialIndex::Region &  r, QgsFeatureId &  id  )

protected

Definition at line 92 of file qgsspatialindex.cpp.

References QgsGeometry::boundingBox(), QgsFeature::geometry(), and QgsFeature::id().

bool QgsSpatialIndex::insertFeature

(

QgsFeature &

f

)

add feature to index

Definition at line 103 of file qgsspatialindex.cpp.

References FID_TO_NUMBER, and QgsDebugMsg.

Referenced by QgsPointDisplacementRenderer::createDisplacementGroups(), and QgsOverlayAnalyzer::intersection().

QList< QgsFeatureId > QgsSpatialIndex::intersects

(

QgsRectangle

rect

)

returns features that intersect the specified rectangle

Definition at line 145 of file qgsspatialindex.cpp.

Referenced by QgsPointDisplacementRenderer::createDisplacementGroups(), and QgsOverlayAnalyzer::intersectFeature().

QList< QgsFeatureId > QgsSpatialIndex::nearestNeighbor	(	QgsPoint	point,
		int	neighbors
	)

returns nearest neighbors (their count is specified by second parameter)

Definition at line 157 of file qgsspatialindex.cpp.

References QgsPoint::x(), and QgsPoint::y().

Region QgsSpatialIndex::rectToRegion ( QgsRectangle  rect )

protected

Definition at line 82 of file qgsspatialindex.cpp.

References QgsRectangle::xMaximum(), QgsRectangle::xMinimum(), QgsRectangle::yMaximum(), and QgsRectangle::yMinimum().

Member Data Documentation

SpatialIndex::ISpatialIndex* QgsSpatialIndex::mRTree

private

R-tree containing spatial index.

Definition at line 88 of file qgsspatialindex.h.

SpatialIndex::StorageManager::IBuffer* QgsSpatialIndex::mStorage

private

buffer for index data

Definition at line 85 of file qgsspatialindex.h.

SpatialIndex::IStorageManager* QgsSpatialIndex::mStorageManager

private

storage manager

Definition at line 82 of file qgsspatialindex.h.

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

• /tmp/buildd/qgis-2.0.1/src/core/qgsspatialindex.h
• /tmp/buildd/qgis-2.0.1/src/core/qgsspatialindex.cpp