Utility functions for working with quadrants.
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#include <Quadrant.h>
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| static int | quadrant (double dx, double dy) |
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| static int | quadrant (const geom::CoordinateXY &p0, const geom::CoordinateXY &p1) |
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| static bool | isOpposite (int quad1, int quad2) |
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static int | commonHalfPlane (int quad1, int quad2) |
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| static bool | isInHalfPlane (int quad, int halfPlane) |
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| static bool | isNorthern (int quad) |
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static const int | NE = 0 |
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static const int | NW = 1 |
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static const int | SW = 2 |
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static const int | SE = 3 |
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Utility functions for working with quadrants.
The quadrants are numbered as follows:
1 | 0
--+--
2 | 3
◆ isInHalfPlane()
| static bool geos::geom::Quadrant::isInHalfPlane |
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int |
quad, |
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int |
halfPlane |
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) |
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static |
Returns whether the given quadrant lies within the given halfplane (specified by its right-hand quadrant).
◆ isNorthern()
| static 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()
| static bool geos::geom::Quadrant::isOpposite |
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int |
quad1, |
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int |
quad2 |
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) |
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inlinestatic |
Returns true if the quadrants are 1 and 3, or 2 and 4
◆ quadrant() [1/2]
| static 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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) |
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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]
| static int geos::geom::Quadrant::quadrant |
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double |
dx, |
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double |
dy |
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) |
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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:
