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geos::geomgraph::TopologyLocation Class Reference

A TopologyLocation is the labelling of a GraphComponent's topological relationship to a single Geometry. More...

#include <TopologyLocation.h>

List of all members.

Public Member Functions

 TopologyLocation (const std::vector< int > &newLocation)
 TopologyLocation (int on, int left, int right)
 Constructs a TopologyLocation specifying how points on, to the left of, and to the right of some GraphComponent relate to some Geometry.
 TopologyLocation (int on)
 TopologyLocation (const TopologyLocation &gl)
int get (size_t posIndex) const
bool isNull () const
bool isAnyNull () const
bool isEqualOnSide (const TopologyLocation &le, int locIndex) const
bool isArea () const
bool isLine () const
void flip ()
void setAllLocations (int locValue)
void setAllLocationsIfNull (int locValue)
void setLocation (size_t locIndex, int locValue)
void setLocation (int locValue)
const std::vector< int > & getLocations () const
 Warning: returns reference to owned memory.
void setLocations (int on, int left, int right)
bool allPositionsEqual (int loc) const
void merge (const TopologyLocation &gl)
 merge updates only the UNDEF attributes of this object with the attributes of another.
std::string toString () const

Friends

std::ostream & operator<< (std::ostream &, const TopologyLocation &)

Detailed Description

A TopologyLocation is the labelling of a GraphComponent's topological relationship to a single Geometry.

If the parent component is an area edge, each side and the edge itself have a topological location. These locations are named

If the parent component is a line edge or node, there is a single topological relationship attribute, ON.

The possible values of a topological location are {Location::UNDEF, Location::EXTERIOR, Location::BOUNDARY, Location::INTERIOR}

The labelling is stored in an array location[j] where where j has the values ON, LEFT, RIGHT


Constructor & Destructor Documentation

geos::geomgraph::TopologyLocation::TopologyLocation ( int  on,
int  left,
int  right 
)

Constructs a TopologyLocation specifying how points on, to the left of, and to the right of some GraphComponent relate to some Geometry.

Possible values for the parameters are Location::UNDEF, Location::EXTERIOR, Location::BOUNDARY, and Location::INTERIOR.

See also:
Location

Member Function Documentation

bool geos::geomgraph::TopologyLocation::isAnyNull (  )  const
Returns:
true if any locations is Location::UNDEF
bool geos::geomgraph::TopologyLocation::isNull (  )  const
Returns:
true if all locations are Location::UNDEF

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