ISpatialQueryDescriptor Class Reference

Inheritance diagram for ISpatialQueryDescriptor:

Public Member Functions
virtual QueryOrder	order () const =0
virtual bool	hasKnnQuery () const =0
virtual KnnQueryDescriptorHandle	getKnnQuery () const =0
virtual bool	hasRegionQuery () const =0
virtual GeometryHandle	getRegionQuery () const =0
virtual bool	requiresSorting () const =0
virtual SortOrder	getSortingOrder () const =0
Public Member Functions inherited from ObjectBase
virtual void	Delete ()

Static Public Member Functions
static ISpatialQueryDescriptor *	New (KnnQueryDescriptorHandle knnQuery, SortOrder sort=SortOrder::unsorted)
	create a new spatial query descriptor object More...
static ISpatialQueryDescriptor *	New (GeometryHandle regionQuery, SortOrder sort=SortOrder::unsorted)
static ISpatialQueryDescriptor *	New (KnnQueryDescriptorHandle knnQuery, GeometryHandle regionQuery, SortOrder sort=SortOrder::unsorted)
	perform knn search and than region query ( More...
static ISpatialQueryDescriptor *	New (GeometryHandle regionQuery, KnnQueryDescriptorHandle knnQuery, SortOrder sort=SortOrder::unsorted)
	perform region query and than knn search ( More...

Member Function Documentation

New() [1/3]

static ISpatialQueryDescriptor* New ( GeometryHandle  regionQuery, KnnQueryDescriptorHandle  knnQuery, SortOrder  sort = SortOrder::unsorted  )

static

perform region query and than knn search (

See also

QueryOrder::regionQueryFirst)

New() [2/3]

static ISpatialQueryDescriptor* New ( KnnQueryDescriptorHandle  knnQuery, GeometryHandle  regionQuery, SortOrder  sort = SortOrder::unsorted  )

static

perform knn search and than region query (

See also

QueryOrder::knnFirst)

New() [3/3]

static ISpatialQueryDescriptor* New ( KnnQueryDescriptorHandle  knnQuery, SortOrder  sort = SortOrder::unsorted  )

static

create a new spatial query descriptor object

In case of knn queries the point are always sorted by the distance in ascending order (2d distances in case of 2d knn query and 3d distances in case of 3d knn query). Hence it is not necessary to speicify a sorting order parameter.