GEOS
3.4.2
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Represents a homogeneous coordinate in a 2-D coordinate space. More...
#include <HCoordinate.h>
Public Member Functions | |
HCoordinate (double _x, double _y, double _w) | |
HCoordinate (const geom::Coordinate &p) | |
HCoordinate (const geom::Coordinate &p1, const geom::Coordinate &p2) | |
Constructs a homogeneous coordinate which is the intersection of the lines define by the homogenous coordinates represented by two Coordinates. More... | |
HCoordinate (const geom::Coordinate &p1, const geom::Coordinate &p2, const geom::Coordinate &q1, const geom::Coordinate &q2) | |
HCoordinate (const HCoordinate &p1, const HCoordinate &p2) | |
double | getX () const |
double | getY () const |
void | getCoordinate (geom::Coordinate &ret) const |
Static Public Member Functions | |
static void | intersection (const geom::Coordinate &p1, const geom::Coordinate &p2, const geom::Coordinate &q1, const geom::Coordinate &q2, geom::Coordinate &ret) |
Computes the (approximate) intersection point between two line segments using homogeneous coordinates. More... | |
Public Attributes | |
double | x |
double | y |
double | w |
Friends | |
std::ostream & | operator<< (std::ostream &o, const HCoordinate &c) |
Represents a homogeneous coordinate in a 2-D coordinate space.
HCoordinate are used as a clean way of computing intersections between line segments.
geos::algorithm::HCoordinate::HCoordinate | ( | const geom::Coordinate & | p1, |
const geom::Coordinate & | p2 | ||
) |
Constructs a homogeneous coordinate which is the intersection of the lines define by the homogenous coordinates represented by two Coordinates.
p1 | |
p2 |
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static |
Computes the (approximate) intersection point between two line segments using homogeneous coordinates.
Note that this algorithm is not numerically stable; i.e. it can produce intersection points which lie outside the envelope of the line segments themselves. In order to increase the precision of the calculation input points should be normalized before passing them to this routine.