Module org.apache.lucene.spatial3d
Package org.apache.lucene.spatial3d.geom

Class GeoExactCircle

java.lang.Object
org.apache.lucene.spatial3d.geom.BasePlanetObject
org.apache.lucene.spatial3d.geom.GeoBaseBounds
org.apache.lucene.spatial3d.geom.GeoBaseShape
org.apache.lucene.spatial3d.geom.GeoBaseMembershipShape
org.apache.lucene.spatial3d.geom.GeoBaseAreaShape
org.apache.lucene.spatial3d.geom.GeoBaseDistanceShape
org.apache.lucene.spatial3d.geom.GeoBaseCircle
org.apache.lucene.spatial3d.geom.GeoExactCircle
All Implemented Interfaces:
Bounded, GeoArea, GeoAreaShape, GeoBounds, GeoCircle, GeoDistance, GeoDistanceShape, GeoMembershipShape, GeoOutsideDistance, GeoShape, GeoSizeable, Membership, PlanetObject, SerializableObject
class GeoExactCircle extends GeoBaseCircle
Circular area with a center and a radius that represents the surface distance to the center. The circle is divided in sectors where the circle edge is approximated using Vincenty formulae. The higher is the precision the more sectors are needed to describe the shape and therefore a penalty in performance.

  • Field Details

    • center

      protected final GeoPoint center
      Center of circle

    • radius

      protected final double radius
      Radius of circle

    • actualAccuracy

      protected final double actualAccuracy
      Actual accuracy

    • edgePoints

      protected final GeoPoint[] edgePoints
      A point that is on the edge of the circle

    • circleSlices

      protected final List<GeoExactCircle.CircleSlice> circleSlices
      Slices of the circle

  • Constructor Details

    • GeoExactCircle

      public GeoExactCircle(PlanetModel planetModel, double lat, double lon, double radius, double accuracy)
      Constructor.
      Parameters:
      planetModel - is the planet model.
      lat - is the center latitude.
      lon - is the center longitude.
      radius - is the surface radius for the circle.
      accuracy - is the allowed error value (linear distance). Maximum accuracy is 1e-12.

    • GeoExactCircle

      public GeoExactCircle(PlanetModel planetModel, InputStream inputStream) throws IOException
      Constructor for deserialization.
      Parameters:
      planetModel - is the planet model.
      inputStream - is the input stream.
      Throws:
      IOException

  • Method Details

    • write

      public void write(OutputStream outputStream) throws IOException
      Description copied from interface: SerializableObject
      Serialize to output stream.
      Specified by:
      write in interface SerializableObject
      Overrides:
      write in class BasePlanetObject
      Parameters:
      outputStream - is the output stream to write to.
      Throws:
      IOException

    • getRadius

      public double getRadius()
      Description copied from interface: GeoSizeable
      Returns the radius of a circle into which the GeoSizeable area can be inscribed.
      Returns:
      the radius.

    • getCenter

      public GeoPoint getCenter()
      Description copied from interface: GeoSizeable
      Returns the center of a circle into which the area will be inscribed.
      Returns:
      the center.

    • distance

      protected double distance(DistanceStyle distanceStyle, double x, double y, double z)
      Description copied from class: GeoBaseDistanceShape
      Called by a computeDistance method if X/Y/Z is within this shape.
      Specified by:
      distance in class GeoBaseDistanceShape

    • distanceBounds

      protected void distanceBounds(Bounds bounds, DistanceStyle distanceStyle, double distanceValue)
      Description copied from class: GeoBaseDistanceShape
      Called by a getDistanceBounds method if distanceValue is not Double.POSITIVE_INFINITY.
      Specified by:
      distanceBounds in class GeoBaseDistanceShape

    • outsideDistance

      protected double outsideDistance(DistanceStyle distanceStyle, double x, double y, double z)
      Description copied from class: GeoBaseMembershipShape
      Called by a computeOutsideDistance method if X/Y/Z is not within this shape.
      Specified by:
      outsideDistance in class GeoBaseMembershipShape

    • isWithin

      public boolean isWithin(double x, double y, double z)
      Description copied from interface: Membership
      Check if a point is within this shape.
      Parameters:
      x - is x coordinate of point to check.
      y - is y coordinate of point to check.
      z - is z coordinate of point to check.
      Returns:
      true if the point is within this shape

    • getEdgePoints

      public GeoPoint[] getEdgePoints()
      Description copied from interface: GeoShape
      Return a sample point that is on the outside edge/boundary of the shape.
      Returns:
      samples of all edge points from distinct edge sections. Typically one point is returned, but zero or two are also possible.

    • intersects

      public boolean intersects(Plane p, GeoPoint[] notablePoints, Membership... bounds)
      Description copied from interface: GeoShape
      Assess whether a plane, within the provided bounds, intersects with the shape's edges. Any overlap, even a single point, is considered to be an intersection. Note well that this method is allowed to return "true" if there are internal edges of a composite shape which intersect the plane. Doing this can cause getRelationship() for most GeoBBox shapes to return OVERLAPS rather than the more correct CONTAINS, but that cannot be helped for some complex shapes that are built out of overlapping parts.
      Parameters:
      p - is the plane to assess for intersection with the shape's edges or bounding curves.
      notablePoints - represents the intersections of the plane with the supplied bounds. These are used to disambiguate when two planes are identical and it needs to be determined whether any points exist that fulfill all the bounds.
      bounds - are a set of bounds that define an area that an intersection must be within in order to qualify (provided by a GeoArea).
      Returns:
      true if there's such an intersection, false if not.

    • intersects

      public boolean intersects(GeoShape geoShape)
      Description copied from interface: GeoAreaShape
      Assess whether a shape intersects with any of the edges of this shape. Note well that this method must return false if the shape contains or is disjoint with the given shape. It is permissible to return true if the shape is within the specified shape, if it is difficult to compute intersection with edges.
      Parameters:
      geoShape - is the shape to assess for intersection with this shape's edges.
      Returns:
      true if there's such an intersection, false if not.

    • getBounds

      public void getBounds(Bounds bounds)
      Description copied from interface: Bounded
      Compute bounds for the shape.
      Specified by:
      getBounds in interface Bounded
      Overrides:
      getBounds in class GeoBaseBounds
      Parameters:
      bounds - is the input bounds object. The input object will be modified.

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class BasePlanetObject

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class BasePlanetObject

    • toString

      public String toString()
      Overrides:
      toString in class Object