org.deegree.commons.utils.math
Class MathUtils

java.lang.Object
  org.deegree.commons.utils.math.MathUtils

public class MathUtils
extends Object

MathUtils

Version:

$Revision: 30119 $, $Date: 2011-03-22 10:02:35 +0100 (Tue, 22 Mar 2011) $

Author:

Andreas Schmitz, last edited by: $Author: aschmitz $

Field Summary

static double	EPSILON
static double	SQRT2 The value of sqrt(2)

Constructor Summary

MathUtils()

Method Summary

static boolean	isZero(double v)
static int	nextPowerOfTwoValue(double value) This method will return the next power of two for the given value, e.g. if value is 511 it will return 512, if value is 513 it will return 1024.
static int	previousPowerOfTwo(double value) This method will return the next power, two must be raised too to give the next power of two, e.g. if value is 511 it will return 9, if value is 513 it will return 10.
static int	round(double v) Helper to round a double value to an int without the need to cast.

Methods inherited from class java.lang.Object

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

Field Detail

EPSILON

public static final double EPSILON

See Also:

Constant Field Values

SQRT2

public static final double SQRT2

The value of sqrt(2)

Constructor Detail

MathUtils

public MathUtils()

Method Detail

round

public static int round(double v)

Helper to round a double value to an int without the need to cast.

Parameters:

v -

Returns:

a rounded int

isZero

public static boolean isZero(double v)

Parameters:

v -

Returns:

true, if abs(v) < EPSILON.

previousPowerOfTwo

public static int previousPowerOfTwo(double value)

This method will return the next power, two must be raised too to give the next power of two, e.g. if value is 511 it will return 9, if value is 513 it will return 10.

Parameters:

value - to use

Returns:

the next power to the base of two the given value has

nextPowerOfTwoValue

public static int nextPowerOfTwoValue(double value)

This method will return the next power of two for the given value, e.g. if value is 511 it will return 512, if value is 513 it will return 1024.

Parameters:

value - to use

Returns:

the next power of two of the given value