Computes the intersections between two line segments in SegmentString and adds them to each string. More...

#include <IntersectionAdder.h>

Inheritance diagram for geos::noding::IntersectionAdder:

Public Member Functions
	IntersectionAdder (algorithm::LineIntersector &newLi)

algorithm::LineIntersector &	getLineIntersector ()

const geom::CoordinateXYZM &	getProperIntersectionPoint ()

bool	hasIntersection ()

bool	hasProperIntersection ()
	A proper intersection is an intersection which is interior to at least two line segments.

bool	hasProperInteriorIntersection ()
	A proper interior intersection is a proper intersection which is not contained in the set of boundary nodes set for this SegmentIntersector.

bool	hasInteriorIntersection ()
	An interior intersection is an intersection which is in the interior of some segment.

void	processIntersections (SegmentString e0, std::size_t segIndex0, 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.

bool	isDone () const override
	Always process all intersections.

Static Public Member Functions
static bool	isAdjacentSegments (std::size_t i1, std::size_t i2)

Public Attributes
int	numIntersections

int	numInteriorIntersections

int	numProperIntersections

int	numTests

Detailed Description

Computes the intersections between two line segments in SegmentString and adds them to each string.

The SegmentIntersector is passed to a Noder. The NodedSegmentString::addIntersections(algorithm::LineIntersector* li, std::size_t segmentIndex, std::size_t geomIndex) method is called whenever the Noder detects that two SegmentStrings might intersect. This class is an example of the Strategy pattern.

Member Function Documentation

◆ getProperIntersectionPoint()

const geom::CoordinateXYZM & geos::noding::IntersectionAdder::getProperIntersectionPoint ( )

inline

Returns: the proper intersection point, or Coordinate::getNull() if none was found

◆ hasProperIntersection()

bool geos::noding::IntersectionAdder::hasProperIntersection ( )

inline

A proper intersection is an intersection which is interior to at least two line segments.

Note that a proper intersection is not necessarily in the interior of the entire Geometry, since another edge may have an endpoint equal to the intersection, which according to SFS semantics can result in the point being on the Boundary of the Geometry.

◆ isDone()

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

inlineoverridevirtual

Always process all intersections.

Returns: false always

Reimplemented from geos::noding::SegmentIntersector.

◆ processIntersections()

void geos::noding::IntersectionAdder::processIntersections	(	SegmentString *	e0,
		std::size_t	segIndex0,
		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 that 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.

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

IntersectionAdder.h

Public Member Functions