Class BoundarySourceLinecaster2D

  • All Implemented Interfaces:
    Linecastable2D

    final class BoundarySourceLinecaster2D
    extends java.lang.Object
    implements Linecastable2D
    Class that performs linecast operations against arbitrary BoundarySource2D instances. This class performs a brute-force computation of the intersections of the line or line subset against all boundaries. Some data structures may support more efficient algorithms and should therefore prefer those instead.
    • Field Detail

      • boundarySrc

        private final BoundarySource2D boundarySrc
        The boundary source instance providing boundaries for the linecast operation.
    • Constructor Detail

      • BoundarySourceLinecaster2D

        BoundarySourceLinecaster2D​(BoundarySource2D boundarySrc)
        Construct a new instance for linecasting against the given boundary source.
        Parameters:
        boundarySrc - boundary source to linecast against.
    • Method Detail

      • linecast

        public java.util.List<LinecastPoint2D> linecast​(LineConvexSubset subset)
        Intersect the given line subset against the boundaries in this instance, returning a list of all intersections in order of increasing position along the line. An empty list is returned if no intersections are discovered.
        Specified by:
        linecast in interface Linecastable2D
        Parameters:
        subset - line subset to intersect
        Returns:
        a list of computed intersections in order of increasing position along the line
      • linecastFirst

        public LinecastPoint2D linecastFirst​(LineConvexSubset subset)
        Intersect the given line subset against the boundaries in this instance, returning the first intersection found when traveling in the direction of the line subset from its start location.
        Specified by:
        linecastFirst in interface Linecastable2D
        Parameters:
        subset - line subset to intersect
        Returns:
        the first intersection found or null if no intersection is found
      • getIntersectionStream

        private java.util.stream.Stream<LinecastPoint2D> getIntersectionStream​(LineConvexSubset subset)
        Return a stream containing intersections between the boundary source and the given line subset.
        Parameters:
        subset - line subset to intersect
        Returns:
        a stream containing linecast intersections
      • computeIntersection

        private LinecastPoint2D computeIntersection​(LineConvexSubset boundary,
                                                    LineConvexSubset subset)
        Compute the intersection between a boundary line subset and linecast intersecting line subset. Null is returned if no intersection is discovered.
        Parameters:
        boundary - boundary from the boundary source
        subset - line subset to intersect with
        Returns:
        the linecast intersection between the two arguments or null if there is no such intersection