toxi.math
Class ExponentialInterpolation

java.lang.Object
  toxi.math.ExponentialInterpolation

All Implemented Interfaces:

InterpolateStrategy

public class ExponentialInterpolation
extends java.lang.Object
implements InterpolateStrategy

Exponential curve interpolation with adjustable exponent. Use exp in the following ranges to achieve these effects:

• 0.0 < x < 1.0 : ease in (steep changes towards b)
• 1.0 : same as LinearInterpolation
• > 1.0 : ease-out (steep changes from a)

Constructor Summary

ExponentialInterpolation()
Default constructor uses square parabola (exp=2)

ExponentialInterpolation(float exp)

Method Summary

float

interpolate(float a, float b, float f) Implements an interpolation equation.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExponentialInterpolation

public ExponentialInterpolation()

Default constructor uses square parabola (exp=2)

ExponentialInterpolation

public ExponentialInterpolation(float exp)

Parameters:

exp - curve exponent

Method Detail

interpolate

public float interpolate(float a,
                         float b,
                         float f)

Description copied from interface: InterpolateStrategy

Implements an interpolation equation.

Specified by:

interpolate in interface InterpolateStrategy

Parameters:

a - current value

b - target value

f - normalized interpolation factor (0.0 .. 1.0)

Returns:

interpolated value