Class Quadrant

java.lang.Object
org.locationtech.jts.geom.Quadrant
public class Quadrant extends Object
Utility functions for working with quadrants of the Euclidean plane.

Quadrants are referenced and numbered as follows: 

1 - NW | 0 - NE
-------+-------
2 - SW | 3 - SE
Version:
1.7

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    NE
     
    static final int
    NW
     
    static final int
    SE
     
    static final int
    SW
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    Quadrant()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static int
    commonHalfPlane(int quad1, int quad2)
    Returns the right-hand quadrant of the halfplane defined by the two quadrants, or -1 if the quadrants are opposite, or the quadrant if they are identical.
    static boolean
    isInHalfPlane(int quad, int halfPlane)
    Returns whether the given quadrant lies within the given halfplane (specified by its right-hand quadrant).
    static boolean
    isNorthern(int quad)
    Returns true if the given quadrant is 0 or 1.
    static boolean
    isOpposite(int quad1, int quad2)
    Returns true if the quadrants are 1 and 3, or 2 and 4
    static int
    quadrant(double dx, double dy)
    Returns the quadrant of a directed line segment (specified as x and y displacements, which cannot both be 0).
    static int
    quadrant(Coordinate p0, Coordinate p1)
    Returns the quadrant of a directed line segment from p0 to p1.

    Methods inherited from class Object

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

  • Field Details

  • Constructor Details

    • Quadrant

      public Quadrant()

  • Method Details

    • quadrant

      public static int quadrant(double dx, double dy)
      Returns the quadrant of a directed line segment (specified as x and y displacements, which cannot both be 0).
      Throws:
      IllegalArgumentException - if the displacements are both 0

    • quadrant

      public static int quadrant(Coordinate p0, Coordinate p1)
      Returns the quadrant of a directed line segment from p0 to p1.
      Throws:
      IllegalArgumentException - if the points are equal

    • isOpposite

      public static boolean isOpposite(int quad1, int quad2)
      Returns true if the quadrants are 1 and 3, or 2 and 4

    • commonHalfPlane

      public static int commonHalfPlane(int quad1, int quad2)
      Returns the right-hand quadrant of the halfplane defined by the two quadrants, or -1 if the quadrants are opposite, or the quadrant if they are identical.

    • isInHalfPlane

      public static boolean isInHalfPlane(int quad, int halfPlane)
      Returns whether the given quadrant lies within the given halfplane (specified by its right-hand quadrant).

    • isNorthern

      public static boolean isNorthern(int quad)
      Returns true if the given quadrant is 0 or 1.