Quantum GIS API Documentation
1.8
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#include <qgsspatialindex.h>
Public Member Functions | |
QgsSpatialIndex () | |
create new spatial index that will be stored in memory | |
~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. |
Definition at line 41 of file qgsspatialindex.h.
create new spatial index that will be stored in memory
create new spatial index that stores its data on disk constructor - creates R-tree
Definition at line 51 of file qgsspatialindex.cpp.
destructor finalizes work with spatial index
Definition at line 75 of file qgsspatialindex.cpp.
bool QgsSpatialIndex::deleteFeature | ( | QgsFeature & | f | ) |
remove feature from index
Definition at line 133 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 144 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 156 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().
SpatialIndex::ISpatialIndex* QgsSpatialIndex::mRTree [private] |
R-tree containing spatial index.
Definition at line 95 of file qgsspatialindex.h.
SpatialIndex::StorageManager::IBuffer* QgsSpatialIndex::mStorage [private] |
buffer for index data
Definition at line 92 of file qgsspatialindex.h.
SpatialIndex::IStorageManager* QgsSpatialIndex::mStorageManager [private] |
storage manager
Definition at line 89 of file qgsspatialindex.h.