codechicken.lib.math

Class MathHelper

java.lang.Object

codechicken.lib.math.MathHelper

public class MathHelper
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static double	phi
static double	pi
static double[]	SIN_TABLE
static double	sqrt2
static double	todeg
static double	torad

Constructor Summary

Constructors

Constructor and Description
MathHelper()

Method Summary

Modifier and Type	Method and Description
static double	approachExp(double a, double b, double ratio)
static double	approachExp(double a, double b, double ratio, double cap)
static int	approachExpI(int a, int b, double ratio)
static double	approachLinear(double a, double b, double max)
static float	approachLinear(float a, float b, float max)
static boolean	between(double a, double x, double b)
static double	clip(double value, double min, double max)
static int	compare(double a, double b)
static int	compare(int a, int b)
static double	cos(double d)
static int	floor_double(double d)
static double	interpolate(double a, double b, double d)
static float	interpolate(float a, float b, float d)
static double	retreatExp(double a, double b, double c, double ratio, double kick)
static int	retreatExpI(int a, int b, int c, double ratio, int kick)
static int	roundAway(double d)
static double	sin(double d)

Methods inherited from class java.lang.Object

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

Field Detail

phi

public static final double phi

See Also:

Constant Field Values

pi

public static final double pi

See Also:

Constant Field Values

todeg

public static final double todeg

See Also:

Constant Field Values

torad

public static final double torad

See Also:

Constant Field Values

sqrt2

public static final double sqrt2

See Also:

Constant Field Values

SIN_TABLE

public static double[] SIN_TABLE

Constructor Detail

MathHelper

public MathHelper()

Method Detail

sin

public static double sin(double d)

cos

public static double cos(double d)

approachLinear

public static float approachLinear(float a,
                                   float b,
                                   float max)

Parameters:

a - The value

b - The value to approach

max - The maximum step

Returns:

the closed value to b no less than max from a

approachLinear

public static double approachLinear(double a,
                                    double b,
                                    double max)

Parameters:

a - The value

b - The value to approach

max - The maximum step

Returns:

the closed value to b no less than max from a

interpolate

public static float interpolate(float a,
                                float b,
                                float d)

Parameters:

a - The first value

b - The second value

d - The interpolation factor, between 0 and 1

Returns:

a+(b-a)*d

interpolate

public static double interpolate(double a,
                                 double b,
                                 double d)

Parameters:

a - The first value

b - The second value

d - The interpolation factor, between 0 and 1

Returns:

a+(b-a)*d

approachExp

public static double approachExp(double a,
                                 double b,
                                 double ratio)

Parameters:

a - The value

b - The value to approach

ratio - The ratio to reduce the difference by

Returns:

a+(b-a)*ratio

approachExp

public static double approachExp(double a,
                                 double b,
                                 double ratio,
                                 double cap)

Parameters:

a - The value

b - The value to approach

ratio - The ratio to reduce the difference by

cap - The maximum amount to advance by

Returns:

a+(b-a)*ratio

retreatExp

public static double retreatExp(double a,
                                double b,
                                double c,
                                double ratio,
                                double kick)

Parameters:

a - The value

b - The value to approach

ratio - The ratio to reduce the difference by

c - The value to retreat from

kick - The difference when a == c

Returns:

clip

public static double clip(double value,
                          double min,
                          double max)

Parameters:

value - The value

min - The min value

max - The max value

Returns:

The clipped value between min and max

between

public static boolean between(double a,
                              double x,
                              double b)

Returns:

a <= x <= b

approachExpI

public static int approachExpI(int a,
                               int b,
                               double ratio)

retreatExpI

public static int retreatExpI(int a,
                              int b,
                              int c,
                              double ratio,
                              int kick)

floor_double

public static int floor_double(double d)

roundAway

public static int roundAway(double d)

compare

public static int compare(int a,
                          int b)

compare

public static int compare(double a,
                          double b)