jhplot.math

Class Vec

java.lang.Object

jhplot.math.Vec

public class Vec
extends java.lang.Object

A small library to work with vectors defined by some dimension. Default is the dimension of Euclidean space (3).

Constructor Summary

Constructors

Constructor and Description
Vec()

Method Summary

Modifier and Type	Method and Description
static double[]	add(double[] a, double[] b) Addition of two vectors.
static double	dotProduct(double[] a, double[] b) Dot product of two vectors.
static double[]	drCharge(double[] rVector, double pull, int qa, int qb) Returns radial unit vector times pull and -qa*qb.
static double	magnitude(double[] a) Returns the magnitude of this vector.
static double[]	multiplay(double c, double[] a) Vector times scalar
static double[]	randomVector(double c) make a random vector.
static double[]	reflect(double[] rVector, double[] draVector, int s) Reflection at the boundary
static void	setDimension(int dimension) Set dimention of vectors.
static double[]	subtract(double[] a, double[] b) Subtraction of two vectors.
static double[]	unitVector(double[] a) Returns the unit vector of this vector.

Methods inherited from class java.lang.Object

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

Constructor Detail

Vec

public Vec()

Method Detail

setDimension

public static void setDimension(int dimension)

Set dimention of vectors.

Parameters:

dimension - dimension of the vectors.

randomVector

public static double[] randomVector(double c)

make a random vector.

Returns:

Returns a random vector (initial conditions).

multiplay

public static double[] multiplay(double c,
                                 double[] a)

Vector times scalar

add

public static double[] add(double[] a,
                           double[] b)

Addition of two vectors.

subtract

public static double[] subtract(double[] a,
                                double[] b)

Subtraction of two vectors.

dotProduct

public static double dotProduct(double[] a,
                                double[] b)

Dot product of two vectors.

magnitude

public static double magnitude(double[] a)

Returns the magnitude of this vector.

unitVector

public static double[] unitVector(double[] a)

Returns the unit vector of this vector.

reflect

public static double[] reflect(double[] rVector,
                               double[] draVector,
                               int s)

Reflection at the boundary

drCharge

public static double[] drCharge(double[] rVector,
                                double pull,
                                int qa,
                                int qb)

Returns radial unit vector times pull and -qa*qb. (Charges)