Package org.locationtech.jts.geomgraph.index

Class SegmentIntersector

java.lang.Object

org.locationtech.jts.geomgraph.index.SegmentIntersector

public class SegmentIntersector
extends Object

Computes the intersection of line segments, and adds the intersection to the edges containing the segments.

Version:

1.7

Field Summary

Fields

Modifier and Type	Field	Description
int	numTests

Constructor Summary

Constructors

Constructor	Description
SegmentIntersector(LineIntersector li, boolean includeProper, boolean recordIsolated)

Method Summary

Modifier and Type	Method	Description
void	addIntersections(Edge e0, int segIndex0, Edge e1, int segIndex1)	This method is called by clients of the EdgeIntersector class to test for and add intersections for two segments of the edges being intersected.
Coordinate	getProperIntersectionPoint()
boolean	hasIntersection()
boolean	hasProperInteriorIntersection()	A proper interior intersection is a proper intersection which is not contained in the set of boundary nodes set for this SegmentIntersector.
boolean	hasProperIntersection()	A proper intersection is an intersection which is interior to at least two line segments.
static boolean	isAdjacentSegments(int i1, int i2)
boolean	isDone()
void	setBoundaryNodes(Collection bdyNodes0, Collection bdyNodes1)
void	setIsDoneIfProperInt(boolean isDoneWhenProperInt)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

numTests

public int numTests

Constructor Detail

SegmentIntersector

public SegmentIntersector(LineIntersector li,
                          boolean includeProper,
                          boolean recordIsolated)

Method Detail

isAdjacentSegments

public static boolean isAdjacentSegments(int i1,
                                         int i2)

setBoundaryNodes

public void setBoundaryNodes(Collection bdyNodes0,
                             Collection bdyNodes1)

setIsDoneIfProperInt

public void setIsDoneIfProperInt(boolean isDoneWhenProperInt)

isDone

public boolean isDone()

getProperIntersectionPoint

public Coordinate getProperIntersectionPoint()

Returns:

the proper intersection point, or null if none was found

hasIntersection

public boolean hasIntersection()

hasProperIntersection

public boolean hasProperIntersection()

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.

hasProperInteriorIntersection

public boolean hasProperInteriorIntersection()

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

addIntersections

public void addIntersections(Edge e0,
                             int segIndex0,
                             Edge e1,
                             int segIndex1)

This method is called by clients of the EdgeIntersector class to test for and add intersections for two segments of the edges being intersected. Note that clients (such as MonotoneChainEdges) may choose not to intersect certain pairs of segments for efficiency reasons.