org.ode4j.math
Class DVectorN

java.lang.Object
  org.ode4j.math.DVectorN

public class DVectorN
extends java.lang.Object

An arbitrary length vector.

Author:

Tilmann Zaeschke

Field Summary

static int

CURRENT_LENGTH

Constructor Summary

DVectorN(double[] data)

DVectorN(DVectorN v2)

DVectorN(int len)

Method Summary

DVectorN	clone()
double	get(int i)
double	get0()
double	get1()
double	get2()
void	normalize() this may be called for vectors `a' with extremely small magnitude, for example the result of a cross product on two nearly perpendicular vectors.
boolean	safeNormalizeN() this may be called for vectors `a' with extremely small magnitude, for example the result of a cross product on two nearly perpendicular vectors.
void	set(double[] a)
void	set(int i, double d) Set a vector/matrix at position i to a specific value.
void	set0(double d)
void	set1(double d)
void	set2(double d)
void	setIdentity()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

CURRENT_LENGTH

public static final int CURRENT_LENGTH

See Also:

Constant Field Values

Constructor Detail

DVectorN

public DVectorN(int len)

DVectorN

public DVectorN(DVectorN v2)

DVectorN

public DVectorN(double[] data)

Method Detail

clone

public DVectorN clone()

Overrides:

clone in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

set0

public void set0(double d)

set1

public void set1(double d)

set2

public void set2(double d)

get0

public double get0()

get1

public double get1()

get2

public double get2()

get

public final double get(int i)

safeNormalizeN

public final boolean safeNormalizeN()

this may be called for vectors `a' with extremely small magnitude, for example the result of a cross product on two nearly perpendicular vectors. we must be robust to these small vectors. to prevent numerical error, first find the component a[i] with the largest magnitude and then scale all the components by 1/a[i]. then we can compute the length of `a' and scale the components by 1/l. this has been verified to work with vectors containing the smallest representable numbers.

normalize

public void normalize()

this may be called for vectors `a' with extremely small magnitude, for example the result of a cross product on two nearly perpendicular vectors. we must be robust to these small vectors. to prevent numerical error, first find the component a[i] with the largest magnitude and then scale all the components by 1/a[i]. then we can compute the length of `a' and scale the components by 1/l. this has been verified to work with vectors containing the smallest representable numbers.

set

public final void set(int i,
                      double d)

Set a vector/matrix at position i to a specific value.

set

public void set(double[] a)

setIdentity

public void setIdentity()