org.locationtech.jts.algorithm

Class Distance

java.lang.Object

org.locationtech.jts.algorithm.Distance

public class Distance
extends Object

Functions to compute distance between basic geometric structures.

Author:

Martin Davis

Constructor Summary

Constructors

Constructor and Description
Distance()

Method Summary

Modifier and Type	Method and Description
static double	pointToLinePerpendicular(Coordinate p, Coordinate A, Coordinate B) Computes the perpendicular distance from a point p to the (infinite) line containing the points AB
static double	pointToLinePerpendicularSigned(Coordinate p, Coordinate A, Coordinate B)
static double	pointToSegment(Coordinate p, Coordinate A, Coordinate B) Computes the distance from a point p to a line segment AB Note: NON-ROBUST!
static double	pointToSegmentString(Coordinate p, Coordinate[] line) Computes the distance from a point to a sequence of line segments.
static double	segmentToSegment(Coordinate A, Coordinate B, Coordinate C, Coordinate D) Computes the distance from a line segment AB to a line segment CD Note: NON-ROBUST!

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Distance

public Distance()

Method Detail

segmentToSegment

public static double segmentToSegment(Coordinate A,
                                      Coordinate B,
                                      Coordinate C,
                                      Coordinate D)

Computes the distance from a line segment AB to a line segment CD Note: NON-ROBUST!

Parameters:

A - a point of one line

B - the second point of (must be different to A)

C - one point of the line

D - another point of the line (must be different to A)

pointToSegmentString

public static double pointToSegmentString(Coordinate p,
                                          Coordinate[] line)

Computes the distance from a point to a sequence of line segments.

Parameters:

p - a point

line - a sequence of contiguous line segments defined by their vertices

Returns:

the minimum distance between the point and the line segments

pointToSegment

public static double pointToSegment(Coordinate p,
                                    Coordinate A,
                                    Coordinate B)

Computes the distance from a point p to a line segment AB Note: NON-ROBUST!

Parameters:

p - the point to compute the distance for

A - one point of the line

B - another point of the line (must be different to A)

Returns:

the distance from p to line segment AB

pointToLinePerpendicular

public static double pointToLinePerpendicular(Coordinate p,
                                              Coordinate A,
                                              Coordinate B)

Computes the perpendicular distance from a point p to the (infinite) line containing the points AB

Parameters:

p - the point to compute the distance for

A - one point of the line

B - another point of the line (must be different to A)

Returns:

the distance from p to line AB

pointToLinePerpendicularSigned

public static double pointToLinePerpendicularSigned(Coordinate p,
                                                    Coordinate A,
                                                    Coordinate B)