org.osmdroid.util

Class Distance

java.lang.Object

org.osmdroid.util.Distance

public class Distance
extends Object

Tools about 2D distance computation Optimized code: we compute the square of the distance. If you really want to know the distance, apply Math.sqrt

Since:

6.0.0

Constructor Summary

Constructors

Constructor and Description
Distance()

Method Summary

Modifier and Type	Method and Description
static double	getProjectionFactorToLine(double pFromX, double pFromY, double pAX, double pAY, double pBX, double pBY)
static double	getProjectionFactorToSegment(double pFromX, double pFromY, double pAX, double pAY, double pBX, double pBY)
static double	getSquaredDistanceToLine(double pFromX, double pFromY, double pAX, double pAY, double pBX, double pBY) Square of the distance between a point and line AB
static double	getSquaredDistanceToPoint(double pFromX, double pFromY, double pToX, double pToY) Square of the distance between two points
static double	getSquaredDistanceToProjection(double pFromX, double pFromY, double pAX, double pAY, double pBX, double pBY, double pProjectionFactor)
static double	getSquaredDistanceToSegment(double pFromX, double pFromY, double pAX, double pAY, double pBX, double pBY) Square of the distance between a point and segment AB

Methods inherited from class java.lang.Object

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

Constructor Detail

Distance

public Distance()

Method Detail

getSquaredDistanceToPoint

public static double getSquaredDistanceToPoint(double pFromX,
                                               double pFromY,
                                               double pToX,
                                               double pToY)

Square of the distance between two points

getSquaredDistanceToLine

public static double getSquaredDistanceToLine(double pFromX,
                                              double pFromY,
                                              double pAX,
                                              double pAY,
                                              double pBX,
                                              double pBY)

Square of the distance between a point and line AB

getSquaredDistanceToSegment

public static double getSquaredDistanceToSegment(double pFromX,
                                                 double pFromY,
                                                 double pAX,
                                                 double pAY,
                                                 double pBX,
                                                 double pBY)

Square of the distance between a point and segment AB

getSquaredDistanceToProjection

public static double getSquaredDistanceToProjection(double pFromX,
                                                    double pFromY,
                                                    double pAX,
                                                    double pAY,
                                                    double pBX,
                                                    double pBY,
                                                    double pProjectionFactor)

Since:

6.0.3 Square of the distance between a point and its projection on line AB

getProjectionFactorToLine

public static double getProjectionFactorToLine(double pFromX,
                                               double pFromY,
                                               double pAX,
                                               double pAY,
                                               double pBX,
                                               double pBY)

Returns:

0 if projected to A, 1 if projected to B, [0,1] if projected inside segment [A,B], < 0 or > 1 if projected outside of the segment

Since:

6.0.3 Projection factor on line AB from a point

getProjectionFactorToSegment

public static double getProjectionFactorToSegment(double pFromX,
                                                  double pFromY,
                                                  double pAX,
                                                  double pAY,
                                                  double pBX,
                                                  double pBY)

Returns:

[0,1]; 0 if projected to A, 1 if projected to B

Since:

6.0.3 Projection factor on segment AB from a point