de.jreality.math

Class Quat

java.lang.Object

de.jreality.math.Quat

public class Quat
extends Object

This class provides static methods that interpret 4-vectors (double-arrays) as Quaternions.

Author:

weissman

Method Summary

Modifier and Type	Method and Description
static double[]	add(double[] dst, double[] a, double[] b)
static double[]	conjugate(double[] dst, double[] a) return the conjugate quaternion: a_bar = a.re - a.im
static double[]	conjugateBy(double[] dst, double[] a, double[] b) compute the conjugation of a by b: b*a*b^-1
static double[]	im(double[] a)
static double[]	invert(double[] dst, double[] a)
static double	length(double[] a)
static double	lengthSqared(double[] a)
static double	re(double[] a)
static double[]	subtract(double[] dst, double[] a, double[] b)
static double[]	times(double[] dst, double[] a, double[] b)
static double[]	times(double[] dst, double a, double[] b)
static double[]	toQuat(double[] dst, double re, double[] im)
static double[]	toQuat(double[] dst, double re, double x, double y, double z)

Methods inherited from class java.lang.Object

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

Method Detail

add

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

subtract

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

times

public static double[] times(double[] dst,
                             double[] a,
                             double[] b)

times

public static double[] times(double[] dst,
                             double a,
                             double[] b)

invert

public static double[] invert(double[] dst,
                              double[] a)

lengthSqared

public static double lengthSqared(double[] a)

length

public static double length(double[] a)

re

public static double re(double[] a)

im

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

toQuat

public static double[] toQuat(double[] dst,
                              double re,
                              double[] im)

toQuat

public static double[] toQuat(double[] dst,
                              double re,
                              double x,
                              double y,
                              double z)

conjugateBy

public static double[] conjugateBy(double[] dst,
                                   double[] a,
                                   double[] b)

compute the conjugation of a by b: b*a*b^-1

Parameters:

dst - the destination

a -

b -

Returns:

the result

conjugate

public static double[] conjugate(double[] dst,
                                 double[] a)

return the conjugate quaternion: a_bar = a.re - a.im

Parameters:

dst - the destination

a - the quaternion to conjugate

Returns: