com.vividsolutions.jts.geomgraph
Class Quadrant
java.lang.Object
com.vividsolutions.jts.geomgraph.Quadrant
public class Quadrant
extends java.lang.Object
Utility functions for working with quadrants, which are numbered as follows:
1 | 0
--+--
2 | 3
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.
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static boolean | isInHalfPlane(int quad, int halfPlane) - Returns whether the given quadrant lies within the given halfplane (specified
by its right-hand quadrant).
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static boolean | isNorthern(int quad) - Returns true if the given quadrant is 0 or 1.
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static boolean | isOpposite(int quad1, int quad2) - Returns true if the quadrants are 1 and 3, or 2 and 4
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static int | quadrant(Coordinate p0, Coordinate p1) - Returns the quadrant of a directed line segment from p0 to p1.
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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).
|
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.
isOpposite
public static boolean isOpposite(int quad1,
int quad2)
Returns true if the quadrants are 1 and 3, or 2 and 4
quadrant
public static int quadrant(Coordinate p0,
Coordinate p1)
Returns the quadrant of a directed line segment from p0 to p1.
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).