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