org.tinspin.index

Interface PointDistanceFunction

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface PointDistanceFunction

Field Summary

Fields

Modifier and Type	Field and Description
static PointDistanceFunction	L1 L1/Manhattan/taxi distance.
static PointDistanceFunction	L2 L2/Euclidean distance.

Method Summary

Modifier and Type	Method and Description
double	dist(double[] p1, double[] p2)
default double	dist(double[] p1, PointEntry<?> entry)
static String	getName(PointDistanceFunction fn)
static double	l1(double[] p1, double[] p2) Manhattan/Taxi distance / L1.
static double	l2(double[] p1, double[] p2) Euclidean distance / L2.

Field Detail

L1

static final PointDistanceFunction L1

L1/Manhattan/taxi distance.

L2

static final PointDistanceFunction L2

L2/Euclidean distance.

Method Detail

dist

double dist(double[] p1,
            double[] p2)

dist

default double dist(double[] p1,
                    PointEntry<?> entry)

Parameters:

p1 - a point

entry - another point

Returns:

distance between the points

l1

static double l1(double[] p1,
                 double[] p2)

Manhattan/Taxi distance / L1.

Parameters:

p1 - point 1

p2 - point 2

Returns:

distance

l2

static double l2(double[] p1,
                 double[] p2)

Euclidean distance / L2.

Parameters:

p1 - point 1

p2 - point 2

Returns:

distance

getName

static String getName(PointDistanceFunction fn)