utils

Class MathUtils

java.lang.Object

utils.MathUtils

public class MathUtils
extends java.lang.Object

Author:

N. Ferrando, J. Alberdi-Rodriguez

Constructor Summary

Constructors

Constructor and Description
MathUtils()

Method Summary

Modifier and Type	Method and Description
static void	applyGrowthAccordingDistanceToPerimeter(float[][] surface) Creates tents for the surface.
static float[][]	avgFilter(float[][] surface, int radio)
static void	fillSurfaceHoles(float[][] surface)
private static int	getIndex(int x, int maxX)
static float[][]	increaseEmptyArea(float[][] inputArea, double scale) Adds an empty area, maintaining the island size.
static int	mod(int x, int m)
static void	normalise(float[][] surface) Normalises the surface, to be able to easily compare surfaces with different tent heights.
static void	planeSurface(float[][] surface)
static float[][]	scale(float[][] originalSurface, double scale) See scale(float[][], int)
static float[][]	scale(float[][] originalSurface, int factor) Given an original surface it reduces by the given factor.
static double	truncate(double value, int decimals)

Methods inherited from class java.lang.Object

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

Constructor Detail

MathUtils

public MathUtils()

Method Detail

mod

public static int mod(int x,
                      int m)

truncate

public static double truncate(double value,
                              int decimals)

fillSurfaceHoles

public static void fillSurfaceHoles(float[][] surface)

applyGrowthAccordingDistanceToPerimeter

public static void applyGrowthAccordingDistanceToPerimeter(float[][] surface)

Creates tents for the surface. Thus, will create more sinusoidal like input for the PSD, which will easier identify the frequencies of those tents.

Parameters:

surface - island surface

planeSurface

public static void planeSurface(float[][] surface)

normalise

public static void normalise(float[][] surface)

Normalises the surface, to be able to easily compare surfaces with different tent heights.

Parameters:

surface -

getIndex

private static int getIndex(int x,
                            int maxX)

avgFilter

public static float[][] avgFilter(float[][] surface,
                                  int radio)

increaseEmptyArea

public static float[][] increaseEmptyArea(float[][] inputArea,
                                          double scale)

Adds an empty area, maintaining the island size. It is useful to compare different size simulations. Converts this island:

  
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Parameters:

inputArea - input area

scale - how much is going to increase (must be > 1)

Returns:

output bigger area

scale

public static float[][] scale(float[][] originalSurface,
                              int factor)

Given an original surface it reduces by the given factor.

Parameters:

originalSurface -

factor -

Returns:

reduced surface

scale

public static float[][] scale(float[][] originalSurface,
                              double scale)

See scale(float[][], int)

Parameters:

originalSurface -

scale -

Returns: