com.io7m.jinterp

Class InterpolationD

java.lang.Object

com.io7m.jinterp.InterpolationD

public final class InterpolationD
extends Object

Interpolation functions.

Method Summary

Modifier and Type	Method and Description
static InterpolationFunctionDType	getCosine()
static InterpolationFunctionDType	getExponential()
static InterpolationFunctionDType	getLinear()
static InterpolationFunctionDType	getLogarithmic()
static double	interpolateCosine(double x0, double x1, double factor) Interpolate between x0 and x1 based on factor such that:
static double	interpolateExponential(double x0, double x1, double factor) Interpolate between x0 and x1 based on factor, using an exponential scale.
static double	interpolateLinear(double x0, double x1, double factor) Linearly interpolate between x0 and x1 based on factor such that:
static double	interpolateLogarithmic(double x0, double x1, double factor) Interpolate between x0 and x1 based on factor, using an exponential scale.

Methods inherited from class java.lang.Object

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

Method Detail

getCosine

public static InterpolationFunctionDType getCosine()

Returns:

An interpolation function based on interpolateCosine(double, double, double).

getExponential

public static InterpolationFunctionDType getExponential()

Returns:

An interpolation function based on interpolateExponential(double, double, double).

getLinear

public static InterpolationFunctionDType getLinear()

Returns:

An interpolation function based on interpolateLinear(double, double, double).

getLogarithmic

public static InterpolationFunctionDType getLogarithmic()

Returns:

An interpolation function based on interpolateLogarithmic(double, double, double).

interpolateCosine

public static double interpolateCosine(double x0,
                                       double x1,
                                       double factor)

Interpolate between x0 and x1 based on factor such that:

 interpolateCosine (x0, x1, 1.0) == x1
 interpolateCosine (x0, x1, 0.0) == x0
 

Parameters:

x0 - The start value

x1 - The end value

factor - The interpolation factor

Returns:

A value between [x0, x1].

interpolateExponential

public static double interpolateExponential(double x0,
                                            double x1,
                                            double factor)

Interpolate between x0 and x1 based on factor, using an exponential scale. When factor == 0, the function returns x0, when factor == 1, the function returns x1. More formally, the function returns x0 + (factor² * (x1 - x0)) .

Parameters:

factor - The interpolation factor in the range [0.0, 1.0]

x0 - The lower bound.

x1 - The upper bound.

Returns:

A value between [x0, x1].

interpolateLinear

public static double interpolateLinear(double x0,
                                       double x1,
                                       double factor)

Linearly interpolate between x0 and x1 based on factor such that:

 interpolateLinear (x0, x1, 1.0) == x1
 interpolateLinear (x0, x1, 0.0) == x0
 

Parameters:

x0 - The start value

x1 - The end value

factor - The interpolation factor

Returns:

A value between [x0, x1].

interpolateLogarithmic

public static double interpolateLogarithmic(double x0,
                                            double x1,
                                            double factor)

Interpolate between x0 and x1 based on factor, using an exponential scale. When factor == 0, the function returns x0, when factor == 1, the function returns x1. More formally, the function returns x0 + (sqrt(factor) * (x1 - x0)) .

Parameters:

factor - The interpolation factor in the range [0.0, 1.0]

x0 - The lower bound.

x1 - The upper bound.

Returns:

A value between [x0, x1].