Quadrant

java.lang.Object
- com.vividsolutions.jts.geomgraph.Quadrant

```
public class Quadrant
extends Object
```
Utility functions for working with quadrants, which are numbered as follows:
```
 1 | 0
 --+--
 2 | 3
 
```

Field Summary

Fields

Modifier and Type	Field and Description
`static int`	`NE`
`static int`	`NW`
`static int`	`SE`
`static int`	`SW`

Constructor Summary

Constructors

Constructor and Description
`Quadrant()`

Method Summary

Methods

Modifier and Type	Method and 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(Coordinate p0, Coordinate p1)` Returns the quadrant of a directed line segment from p0 to p1.
`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).

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - NE
```
public static final int NE
```
    See Also:
    
    Constant Field Values
  - NW
```
public static final int NW
```
    See Also:
    
    Constant Field Values
  - SW
```
public static final int SW
```
    See Also:
    
    Constant Field Values
  - SE
```
public static final int SE
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - Quadrant
```
public Quadrant()
```
- Method Detail
  - 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.

Class Quadrant

Field Summary

Fields

Constructor Summary

Constructors

Method Summary

Methods

Methods inherited from class java.lang.Object

Field Detail

NE

NW

SW

SE

Constructor Detail

Quadrant

Method Detail

quadrant

quadrant

isOpposite

commonHalfPlane

isInHalfPlane

isNorthern