org.lazywizard.lazylib

Class FastTrig

Object

FastTrig

public class FastTrig
extends Object

Math utility class that trades accuracy for speed, often returning several times faster than Math's equivalent functions.

Since:

1.0

Author:

Various (see javadoc of individual methods for attributions)

Method Summary

Modifier and Type	Method and Description
static double	atan(double z) Returns the arc tangent of a value.
static double	atan2(double y, double x) Returns the angle theta from the conversion of rectangular coordinates (x, y) to polar coordinates (r, theta).
static double	cos(double radians) Get the cosine of an angle.
static double	sin(double radians) Get the sine of an angle.

Methods inherited from class Object

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

Method Detail

sin

public static double sin(double radians)

Get the sine of an angle.

Originally written by JeffK, and taken from the Slick2D game library.

Parameters:

radians - The angle, in radians.

Returns:

The sine of radians.

Since:

1.0

cos

public static double cos(double radians)

Get the cosine of an angle.

Originally written by JeffK, and taken from the Slick2D game library.

Parameters:

radians - The angle, in radians.

Returns:

The cosine of radians.

Since:

1.0

atan

public static double atan(double z)

Returns the arc tangent of a value. Accurate to within 0.005 radians, or ~0.29 degrees.

Originally written by Nic Taylor, and taken from this page.

Parameters:

z - The value to calculate the arc tangent of.

Returns:

The arc tangent of z, in radians.

Since:

2.3

atan2

public static double atan2(double y,
                           double x)

Returns the angle theta from the conversion of rectangular coordinates (x, y) to polar coordinates (r, theta). Accurate to within 0.005 radians, or ~0.29 degrees.

Originally written by Nic Taylor, further modified by imuli, and taken from this page.

Parameters:

y - The ordinate coordinate.

x - The abscissa coordinate.

Returns:

The theta component of the point (r, theta) in polar coordinates that corresponds to the point (x, y) in Cartesian coordinates.

Since:

2.3