deformablemesh.util

Class Vector3DOps

java.lang.Object

deformablemesh.util.Vector3DOps

public class Vector3DOps
extends Object

Created by msmith on 5/21/14.

Field Summary

Fields

Modifier and Type	Field and Description
static double[]	nxhat
static double[]	nyhat
static double[]	nzhat
static double	TOL
static double[]	xhat
static double[]	yhat
static double[]	zhat

Constructor Summary

Constructors

Constructor and Description
Vector3DOps()

Method Summary

Modifier and Type	Method and Description
static double	abs(double v)
static double[]	add(double[] a, double[] b, double f) Displacing point a by the distance f along vector b.
static double[]	average(double[]... v)
static double[]	cross(double[] a, double[] b)
static double[]	difference(double[] minuend, double[] subtrahend)
static double	distance(double[] a, double[] b)
static double	dot(double[] a, double[] b)
static double[]	getPerpendicularNormalizedVector(double[] o) Finds the shortest component of the input vector, creates a unit vector along that axis and then uses the cross product to get a mutually exclusive vector.
static double	mag(double[] v)
static double	minLength(double[] l)
static double	normalize(double[] v) Normalizes the vector in place and returns the original length.
static boolean	proximity(double[] a, double[] b, double r) Checks if a and be are within the range of r by summing the square of differences and squaring r.
static double[]	rotatePoint(double[] p, double[] axisAngle, double[] center)
static double	sqrt(double v)
static double	square(double a)
static double	toSpan(double dr, double l) How many dr's does it take to fill an l.

Methods inherited from class java.lang.Object

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

Field Detail

zhat

public static final double[] zhat

yhat

public static final double[] yhat

xhat

public static final double[] xhat

nzhat

public static final double[] nzhat

nyhat

public static final double[] nyhat

nxhat

public static final double[] nxhat

TOL

public static final double TOL

See Also:

Constant Field Values

Constructor Detail

Vector3DOps

public Vector3DOps()

Method Detail

cross

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

dot

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

sqrt

public static double sqrt(double v)

normalize

public static double normalize(double[] v)

Normalizes the vector in place and returns the original length.

Parameters:

v -

Returns:

square

public static double square(double a)

distance

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

mag

public static double mag(double[] v)

difference

public static double[] difference(double[] minuend,
                                  double[] subtrahend)

Parameters:

minuend - positive value

subtrahend - negative value

Returns:

minuend - subtrahend

toSpan

public static double toSpan(double dr,
                            double l)

How many dr's does it take to fill an l. Returns the absolute value of dr/l or Infinity if dr==0.

Parameters:

dr - chunk size.

l - length to be spanned.

add

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

Displacing point a by the distance f along vector b.

Parameters:

a - starting point.

b - translation vector

f - distance translated.

Returns:

a new double containing a + fb.

proximity

public static boolean proximity(double[] a,
                                double[] b,
                                double r)

Checks if a and be are within the range of r by summing the square of differences and squaring r.

Parameters:

a - center of sphere

b - point to be checked

r - radius

Returns:

if the distance between a and b is less than or equal to r.

minLength

public static double minLength(double[] l)

getPerpendicularNormalizedVector

public static double[] getPerpendicularNormalizedVector(double[] o)

Finds the shortest component of the input vector, creates a unit vector along that axis and then uses the cross product to get a mutually exclusive vector.

Parameters:

o -

Returns:

abs

public static double abs(double v)

average

public static double[] average(double[]... v)

rotatePoint

public static double[] rotatePoint(double[] p,
                                   double[] axisAngle,
                                   double[] center)