Class HCoordinate

Represents a homogeneous coordinate in a 2-D coordinate space. In NTS HCoordinates are used as a clean way of computing intersections between line segments.

Inheritance
object
HCoordinate
Inherited Members
Namespace: NetTopologySuite.Algorithm
Assembly: NetTopologySuite.dll
Syntax
public class HCoordinate

Constructors

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HCoordinate()

Declaration
public HCoordinate()
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HCoordinate(HCoordinate, HCoordinate)

Declaration
public HCoordinate(HCoordinate p1, HCoordinate p2)
Parameters
Type Name Description
HCoordinate p1
HCoordinate p2
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HCoordinate(Coordinate)

Declaration
public HCoordinate(Coordinate p)
Parameters
Type Name Description
Coordinate p
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HCoordinate(Coordinate, Coordinate)

Constructs a homogeneous coordinate which is the intersection of the lines Coordinates. define by the homogeneous coordinates represented by two

Declaration
public HCoordinate(Coordinate p1, Coordinate p2)
Parameters
Type Name Description
Coordinate p1

A coordinate
Coordinate p2

A coordinate
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HCoordinate(Coordinate, Coordinate, Coordinate, Coordinate)

Creates an instance of this

Declaration
public HCoordinate(Coordinate p1, Coordinate p2, Coordinate q1, Coordinate q2)
Parameters
Type Name Description
Coordinate p1
Coordinate p2
Coordinate q1
Coordinate q2
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HCoordinate(double, double, double)

Declaration
public HCoordinate(double x, double y, double w)
Parameters
Type Name Description
double x
double y
double w

Properties

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Coordinate

Declaration
public Coordinate Coordinate { get; }
Property Value
Type Description
Coordinate

Methods

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GetX()

Declaration
public double GetX()
Returns
Type Description
double
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GetY()

Declaration
public double GetY()
Returns
Type Description
double
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Intersection(Coordinate, Coordinate, Coordinate, Coordinate)

Computes the (approximate) intersection point between two line segments using homogeneous coordinates.

Declaration
[Obsolete("Use Intersection.Compute(Coordinate, Coordinate, Coordinate, Coordinate)")]
public static Coordinate Intersection(Coordinate p1, Coordinate p2, Coordinate q1, Coordinate q2)
Parameters
Type Name Description
Coordinate p1

1st Coordinate of 1st linesegment
Coordinate p2

2nd Coordinate of 1st linesegment
Coordinate q1

1st Coordinate of 2nd linesegment
Coordinate q2

2nd Coordinate of 2nd linesegment
Returns
Type Description
Coordinate
Remarks

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.

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OldIntersection(Coordinate, Coordinate, Coordinate, Coordinate)

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.

Declaration
public static Coordinate OldIntersection(Coordinate p1, Coordinate p2, Coordinate q1, Coordinate q2)
Parameters
Type Name Description
Coordinate p1
Coordinate p2
Coordinate q1
Coordinate q2
Returns
Type Description
Coordinate