at.mug.iqm.commons.jaitools

Class KernelFactoryHelper

java.lang.Object

at.mug.iqm.commons.jaitools.KernelFactoryHelper

class KernelFactoryHelper
extends Object

A helper class for KernelFactory. This is package-private and not intended for use by client code.

Author:

Michael Bedward

Field Summary

Fields

Modifier and Type	Field and Description
private static double	DTOL
private static float	FTOL

Constructor Summary

Constructors

Constructor and Description
KernelFactoryHelper() Constructor.

Method Summary

Modifier and Type	Method and Description
(package private) int	dcomp(double d1, double d2) Compare two double values, allowing for a fixed round-off tolerance
(package private) boolean	dzero(double d) Check if a double value is zero, allowing for a fixed round-off tolerance
(package private) int	fcomp(float f1, float f2) Compare to float values allowing for a fixed round-off tolerance
(package private) boolean	feq(float f1, float f2) Test if two float values are equal, taking into accont a round-off tolerance
(package private) float[]	makeCircle(int radius) Create a new float array with data for a raster circle outline of specified radius
(package private) float[]	makeRect(int w, int h) Create a flat array representing a rectangular grid with all elements having value 1.0f
(package private) float	normalizeAngle(float angle) Normalize the input angle to be between -PI and PI
(package private) float	normalizeAnglePositive(float angle) Normalize the input angle to be between 0 and 2*PI
(package private) void	rowFill(float[] m, int mwidth, int mheight) Takes a float array with data for a closed raster shape and fills the shape by setting element values to 1

Methods inherited from class java.lang.Object

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

Field Detail

FTOL

private static final float FTOL

See Also:

Constant Field Values

DTOL

private static final double DTOL

See Also:

Constant Field Values

Constructor Detail

KernelFactoryHelper

KernelFactoryHelper()

Constructor. Empty: defined only to ensure that it is package private.

Method Detail

makeCircle

float[] makeCircle(int radius)

Create a new float array with data for a raster circle outline of specified radius

makeRect

float[] makeRect(int w,
                 int h)

Create a flat array representing a rectangular grid with all elements having value 1.0f

Parameters:

w - imgWidth

h - imgHeight

rowFill

void rowFill(float[] m,
             int mwidth,
             int mheight)

Takes a float array with data for a closed raster shape and fills the shape by setting element values to 1

Parameters:

m -

mwidth -

mheight -

normalizeAngle

float normalizeAngle(float angle)

Normalize the input angle to be between -PI and PI

Parameters:

angle - input angle (radians)

Returns:

normalized angle

normalizeAnglePositive

float normalizeAnglePositive(float angle)

Normalize the input angle to be between 0 and 2*PI

Parameters:

angle - input angle (radians)

Returns:

normalized angle

dcomp

int dcomp(double d1,
          double d2)

Compare two double values, allowing for a fixed round-off tolerance

Parameters:

d1 - first value

d2 - second value

Returns:

a value < 0 if d1 < d2; 0 if d1 == d2; a value > 0 if d1 > d2

dzero

boolean dzero(double d)

Check if a double value is zero, allowing for a fixed round-off tolerance

fcomp

int fcomp(float f1,
          float f2)

Compare to float values allowing for a fixed round-off tolerance

Parameters:

f1 - first value

f2 - second value

Returns:

a value < 0 if f1 < f2; 0 if f1 == f2; a value > 0 if f1 > f2

feq

boolean feq(float f1,
            float f2)

Test if two float values are equal, taking into accont a round-off tolerance

Parameters:

f1 - first value

f2 - second value

Returns:

true if equal, false otherwise