geos::noding::SegmentIntersectionDetector Class Reference

Detects and records an intersection between two SegmentStrings, if one exists. More...

#include <SegmentIntersectionDetector.h>

Inheritance diagram for geos::noding::SegmentIntersectionDetector:

Public Member Functions
	SegmentIntersectionDetector (algorithm::LineIntersector *p_li)
void	setFindProper (bool p_findProper)
void	setFindAllIntersectionTypes (bool p_findAllTypes)
bool	hasIntersection () const
	Tests whether an intersection was found. More...
bool	hasProperIntersection () const
	Tests whether a proper intersection was found. More...
bool	hasNonProperIntersection () const
	Tests whether a non-proper intersection was found. More...
const geom::Coordinate *	getIntersection () const
	Gets the computed location of the intersection. Due to round-off, the location may not be exact. More...
const geom::CoordinateSequence *	getIntersectionSegments () const
	Gets the endpoints of the intersecting segments. More...
bool	isDone () const override
	Reports whether the client of this class needs to continue testing all intersections in an arrangement. More...
void	processIntersections (noding::SegmentString *e0, std::size_t segIndex0, noding::SegmentString *e1, std::size_t segIndex1) override
	This method is called by clients of the SegmentIntersector class to process intersections for two segments of the SegmentStrings being intersected. More...
virtual void	processIntersections (SegmentString *e0, std::size_t segIndex0, SegmentString *e1, std::size_t segIndex1)=0
virtual bool	isDone () const
	Reports whether the client of this class needs to continue testing all intersections in an arrangement. More...

Detailed Description

Detects and records an intersection between two SegmentStrings, if one exists.

This strategy can be configured to search for proper intersections. In this case, the presence of any intersection will still be recorded, but searching will continue until either a proper intersection has been found or no intersections are detected.

Only a single intersection is recorded.

Version

1.7

Member Function Documentation

getIntersection()

const geom::Coordinate * geos::noding::SegmentIntersectionDetector::getIntersection ( ) const

inline

Gets the computed location of the intersection. Due to round-off, the location may not be exact.

Returns

the coordinate for the intersection location

getIntersectionSegments()

const geom::CoordinateSequence * geos::noding::SegmentIntersectionDetector::getIntersectionSegments ( ) const

inline

Gets the endpoints of the intersecting segments.

Returns

an array of the segment endpoints (p00, p01, p10, p11)

hasIntersection()

bool geos::noding::SegmentIntersectionDetector::hasIntersection ( ) const

inline

Tests whether an intersection was found.

Returns

true if an intersection was found

hasNonProperIntersection()

bool geos::noding::SegmentIntersectionDetector::hasNonProperIntersection ( ) const

inline

Tests whether a non-proper intersection was found.

Returns

true if a non-proper intersection was found

hasProperIntersection()

bool geos::noding::SegmentIntersectionDetector::hasProperIntersection ( ) const

inline

Tests whether a proper intersection was found.

Returns

true if a proper intersection was found

isDone()

bool geos::noding::SegmentIntersectionDetector::isDone ( ) const

inlineoverridevirtual

Reports whether the client of this class needs to continue testing all intersections in an arrangement.

Returns

true if there is not need to continue testing segments

The default implementation always return false (process all intersections).

Reimplemented from geos::noding::SegmentIntersector.

processIntersections()

void geos::noding::SegmentIntersectionDetector::processIntersections ( noding::SegmentString *  e0, std::size_t  segIndex0, noding::SegmentString *  e1, std::size_t  segIndex1  )

overridevirtual

This method is called by clients of the SegmentIntersector class to process intersections for two segments of the SegmentStrings being intersected.

Note

Some clients (such as MonotoneChains) may optimize away this call for segment pairs which they have determined do not intersect (e.g. by an disjoint envelope test).

Implements geos::noding::SegmentIntersector.

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

• SegmentIntersectionDetector.h