#include <Quadrant.h>
List of all members.
Static Public Member Functions |
static int | quadrant (double dx, double dy) |
static int | quadrant (const geom::Coordinate &p0, const geom::Coordinate &p1) |
static bool | isOpposite (int quad1, int quad2) |
static int | commonHalfPlane (int quad1, int quad2) |
static bool | isInHalfPlane (int quad, int halfPlane) |
static bool | isNorthern (int quad) |
Static Public Attributes |
static const int | NE = 0 |
static const int | NW = 1 |
static const int | SW = 2 |
static const int | SE = 3 |
Detailed Description
Utility functions for working with quadrants, which are numbered as follows:
1 | 0
--+--
2 | 3
Member Function Documentation
static bool geos::geomgraph::Quadrant::isInHalfPlane |
( |
int |
quad, |
|
|
int |
halfPlane | |
|
) |
| | [static] |
Returns whether the given quadrant lies within the given halfplane (specified by its right-hand quadrant).
static bool geos::geomgraph::Quadrant::isNorthern |
( |
int |
quad |
) |
[static] |
Returns true if the given quadrant is 0 or 1.
static bool geos::geomgraph::Quadrant::isOpposite |
( |
int |
quad1, |
|
|
int |
quad2 | |
|
) |
| | [static] |
Returns true if the quadrants are 1 and 3, or 2 and 4
static int geos::geomgraph::Quadrant::quadrant |
( |
double |
dx, |
|
|
double |
dy | |
|
) |
| | [static] |
Returns the quadrant of a directed line segment (specified as x and y displacements, which cannot both be 0).
- Exceptions:
-
| IllegalArgumentException | if the displacements are both 0 |
Returns the quadrant of a directed line segment from p0 to p1.
- Exceptions:
-
| IllegalArgumentException | if the points are equal |
The documentation for this class was generated from the following file: