util

Class SineMaker

java.lang.Object

util.SineMaker

public class SineMaker
extends java.lang.Object

A utility class that can be used to create smoothly varying sinusoidal numerical data. Note that this is not a singleton class nor does it have static methods as its behavior depends on the minimum, maximum and delta values given to its constructor.

Field Summary

Fields

Modifier and Type	Field and Description
private double	_ampl The amplitude of the sinusoidal output
private double	_delta The amount that _theta is incremented each time, in radians.
private double	_mid The midpoint of the min and max values.
private double	_theta The current angle used to generate the current sinusoidal value.

Constructor Summary

Constructors

Constructor and Description
SineMaker(double min, double max, double delta) The constructor takes several values to control the object's behavior.

Method Summary

Modifier and Type	Method and Description
double	getDblVal() Returns a different value each time it is called.
int	getIntVal() Same as getDblVal, but returns the result rounded to the nearest integer.

Methods inherited from class java.lang.Object

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

Field Detail

_mid

private double _mid

The midpoint of the min and max values.

_ampl

private double _ampl

The amplitude of the sinusoidal output

_delta

private double _delta

The amount that _theta is incremented each time, in radians.

_theta

private double _theta

The current angle used to generate the current sinusoidal value. Initialized to produce the minimum value.

Constructor Detail

SineMaker

public SineMaker(double min,
                 double max,
                 double delta)

The constructor takes several values to control the object's behavior.

Parameters:

min - The minimum and initial value to produce.

max - The maximum value to produce.

delta - The amount in radians that the generating angle is incremented each time

Method Detail

getDblVal

public double getDblVal()

Returns a different value each time it is called. The value varies smoothly in a sinusoidal fashion, incrementing each time as per the above specified delta angle increase.

Returns:

the next sinusoidal value

getIntVal

public int getIntVal()

Same as getDblVal, but returns the result rounded to the nearest integer. Note that getDblVal and getIntVal are not independent as getIntVal merely calls getDblVal.

Returns:

the next sinusoidal value as an int