com.vividsolutions.jts.noding

Class SegmentIntersectionDetector

  • All Implemented Interfaces:
    SegmentIntersector 

    public class SegmentIntersectionDetector
extends Object
implements SegmentIntersector
    Detects and records an intersection between two SegmentStrings, if one exists. Only a single intersection is recorded. This strategy can be configured to search for proper intersections>/b>. In this case, the presence of any kind of intersection will still be recorded, but searching will continue until either a proper intersection has been found or no intersections are detected.

    • Constructor Detail

      • SegmentIntersectionDetector

        public SegmentIntersectionDetector()
        Creates an intersection finder using a RobustLineIntersector.

      • SegmentIntersectionDetector

        public SegmentIntersectionDetector(LineIntersector li)
        Creates an intersection finder using a given LineIntersector.
        Parameters:
        li - the LineIntersector to use

    • Method Detail

      • setFindProper

        public void setFindProper(boolean findProper)
        Sets whether processing must continue until a proper intersection is found.
        Parameters:
        findProper - true if processing should continue until a proper intersection is found

      • setFindAllIntersectionTypes

        public void setFindAllIntersectionTypes(boolean findAllTypes)
        Sets whether processing can terminate once any intersection is found.
        Parameters:
        findAllTypes - true if processing can terminate once any intersection is found.

      • hasIntersection

        public boolean hasIntersection()
        Tests whether an intersection was found.
        Returns:
        true if an intersection was found

      • hasProperIntersection

        public boolean hasProperIntersection()
        Tests whether a proper intersection was found.
        Returns:
        true if a proper intersection was found

      • hasNonProperIntersection

        public boolean hasNonProperIntersection()
        Tests whether a non-proper intersection was found.
        Returns:
        true if a non-proper intersection was found

      • getIntersection

        public Coordinate getIntersection()
        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

        public Coordinate[] getIntersectionSegments()
        Gets the endpoints of the intersecting segments.
        Returns:
        an array of the segment endpoints (p00, p01, p10, p11)

      • 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).

      • isDone

        public boolean isDone()
        Tests whether processing can terminate, because all required information has been obtained (e.g. an intersection of the desired type has been detected).
        Specified by:
        isDone in interface  SegmentIntersector
        Returns:
        true if processing can terminate