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GEOS 3.11.1
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A pair of Boundables, whose leaf items support a distance metric between them. More...
#include <BoundablePair.h>
Public Types | |
| typedef std::priority_queue< BoundablePair *, std::vector< BoundablePair * >, BoundablePairQueueCompare > | BoundablePairQueue |
Public Member Functions | |
| BoundablePair (const Boundable *boundable1, const Boundable *boundable2, ItemDistance *itemDistance) | |
| const Boundable * | getBoundable (int i) const |
| double | distance () const |
Computes the distance between the Boundables in this pair. The boundables are either composites or leaves. More... | |
| double | getDistance () const |
| Gets the minimum possible distance between the Boundables in this pair. More... | |
| bool | isLeaves () const |
| double | maximumDistance () |
| Computes the maximum distance between any two items in the pair of nodes. More... | |
| void | expandToQueue (BoundablePairQueue &, double minDistance) |
| void | expand (const Boundable *bndComposite, const Boundable *bndOther, bool isFlipped, BoundablePairQueue &priQ, double minDistance) |
Static Public Member Functions | |
| static bool | isComposite (const Boundable *item) |
| static double | area (const Boundable *b) |
A pair of Boundables, whose leaf items support a distance metric between them.
Used to compute the distance between the members, and to expand a member relative to the other in order to produce new branches of the Branch-and-Bound evaluation tree. Provides an ordering based on the distance between the members, which allows building a priority queue by minimum distance.
| double geos::index::strtree::BoundablePair::distance | ( | ) | const |
Computes the distance between the Boundables in this pair. The boundables are either composites or leaves.
If either is composite, the distance is computed as the minimum distance between the bounds. If both are leaves, the distance is computed by ItemDistance::distance(const ItemBoundable* item1, const ItemBoundable* item2).
| const Boundable * geos::index::strtree::BoundablePair::getBoundable | ( | int | i | ) | const |
Gets one of the member Boundables in the pair (indexed by [0, 1]).
| i | the index of the member to return (0 or 1) |
| double geos::index::strtree::BoundablePair::getDistance | ( | ) | const |
Gets the minimum possible distance between the Boundables in this pair.
If the members are both items, this will be the exact distance between them. Otherwise, this distance will be a lower bound on the distances between the items in the members.
| bool geos::index::strtree::BoundablePair::isLeaves | ( | ) | const |
Tests if both elements of the pair are leaf nodes
| double geos::index::strtree::BoundablePair::maximumDistance | ( | ) |
Computes the maximum distance between any two items in the pair of nodes.
1.9.4