#include <PreparedGeometry.h>
Public Member Functions | |
virtual const geom::Geometry & | getGeometry () const =0 |
virtual bool | contains (const geom::Geometry *geom) const =0 |
virtual bool | containsProperly (const geom::Geometry *geom) const =0 |
Tests whether the base Geometry properly contains a given geometry. | |
virtual bool | coveredBy (const geom::Geometry *geom) const =0 |
virtual bool | covers (const geom::Geometry *geom) const =0 |
virtual bool | crosses (const geom::Geometry *geom) const =0 |
virtual bool | disjoint (const geom::Geometry *geom) const =0 |
virtual bool | intersects (const geom::Geometry *geom) const =0 |
virtual bool | overlaps (const geom::Geometry *geom) const =0 |
virtual bool | touches (const geom::Geometry *geom) const =0 |
virtual bool | within (const geom::Geometry *geom) const =0 |
A given implementation may provide optimized implementations for only some of the specified methods, and delegate the remaining methods to the original Geometry operations. An implementation may also only optimize certain situations, and delegate others. See the implementing classes for documentation about which methods and situations they optimize.
virtual const geom::Geometry& geos::geom::prep::PreparedGeometry::getGeometry | ( | ) | const [pure virtual] |
Gets the original Geometry which has been prepared.
Implemented in geos::geom::prep::BasicPreparedGeometry.
virtual bool geos::geom::prep::PreparedGeometry::contains | ( | const geom::Geometry * | geom | ) | const [pure virtual] |
Tests whether the base Geometry contains a given geometry.
Implemented in geos::geom::prep::BasicPreparedGeometry, and geos::geom::prep::PreparedPolygon.
virtual bool geos::geom::prep::PreparedGeometry::containsProperly | ( | const geom::Geometry * | geom | ) | const [pure virtual] |
Tests whether the base Geometry properly contains a given geometry.
The containsProperly
predicate has the following equivalent definitions:
[T**FF*FF*]
In other words, if the test geometry has any interaction with the boundary of the target geometry the result of containsProperly
is false
. This is different semantics to the Geometry::contains predicate, * in which test geometries can intersect the target's boundary and still be contained.
The advantage of using this predicate is that it can be computed efficiently, since it avoids the need to compute the full topological relationship of the input boundaries in cases where they intersect.
An example use case is computing the intersections of a set of geometries with a large polygonal geometry. Since intersection
is a fairly slow operation, it can be more efficient to use containsProperly
to filter out test geometries which lie wholly inside the area. In these cases the intersection is known a priori to be exactly the original test geometry.
Implemented in geos::geom::prep::BasicPreparedGeometry, and geos::geom::prep::PreparedPolygon.
virtual bool geos::geom::prep::PreparedGeometry::coveredBy | ( | const geom::Geometry * | geom | ) | const [pure virtual] |
virtual bool geos::geom::prep::PreparedGeometry::covers | ( | const geom::Geometry * | geom | ) | const [pure virtual] |
Tests whether the base Geometry covers a given geometry.
Implemented in geos::geom::prep::BasicPreparedGeometry, and geos::geom::prep::PreparedPolygon.
virtual bool geos::geom::prep::PreparedGeometry::crosses | ( | const geom::Geometry * | geom | ) | const [pure virtual] |
virtual bool geos::geom::prep::PreparedGeometry::disjoint | ( | const geom::Geometry * | geom | ) | const [pure virtual] |
virtual bool geos::geom::prep::PreparedGeometry::intersects | ( | const geom::Geometry * | geom | ) | const [pure virtual] |
Tests whether the base Geometry intersects a given geometry.
Implemented in geos::geom::prep::BasicPreparedGeometry, geos::geom::prep::PreparedLineString, and geos::geom::prep::PreparedPolygon.
virtual bool geos::geom::prep::PreparedGeometry::overlaps | ( | const geom::Geometry * | geom | ) | const [pure virtual] |
virtual bool geos::geom::prep::PreparedGeometry::touches | ( | const geom::Geometry * | geom | ) | const [pure virtual] |
virtual bool geos::geom::prep::PreparedGeometry::within | ( | const geom::Geometry * | geom | ) | const [pure virtual] |