com.vividsolutions.jts.noding

Class IntersectionAdder

Implemented Interfaces:
SegmentIntersector

public class IntersectionAdder
extends java.lang.Object
implements SegmentIntersector

Computes the intersections between two line segments in SegmentStrings and adds them to each string. The SegmentIntersector is passed to a Noder. The addIntersections method is called whenever the Noder detects that two SegmentStrings might intersect. This class is an example of the Strategy pattern.
Version:
1.7

Field Summary

int
numInteriorIntersections
int
numIntersections
int
numProperIntersections
int
numTests

Constructor Summary

IntersectionAdder(LineIntersector li)

Method Summary

LineIntersector
getLineIntersector()
Coordinate
getProperIntersectionPoint()
boolean
hasInteriorIntersection()
An interior intersection is an intersection which is in the interior of some segment.
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)
void
processIntersections(SegmentString e0, int segIndex0, SegmentString e1, int segIndex1)
This method is called by clients of the SegmentIntersector class to process intersections for two segments of the SegmentStrings being intersected.

Field Details

numInteriorIntersections

public int numInteriorIntersections

numIntersections

public int numIntersections

numProperIntersections

public int numProperIntersections

numTests

public int numTests

Constructor Details

IntersectionAdder

public IntersectionAdder(LineIntersector li)

Method Details

getLineIntersector

public LineIntersector getLineIntersector()

getProperIntersectionPoint

public Coordinate getProperIntersectionPoint()
Returns:
the proper intersection point, or null if none was found

hasInteriorIntersection

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

hasIntersection

public boolean hasIntersection()

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.

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.

isAdjacentSegments

public static boolean isAdjacentSegments(int i1,
                                         int i2)

processIntersections

public void processIntersections(SegmentString e0,
                                 int segIndex0,
                                 SegmentString e1,
                                 int segIndex1)
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).
Specified by:
processIntersections in interface SegmentIntersector