org.gephi.appearance.api

Class Interpolator

java.lang.Object

org.gephi.appearance.api.Interpolator

Direct Known Subclasses:

Interpolator.BezierInterpolator

public abstract class Interpolator
extends Object

Abstract class that defines the single interpolate(float) method. This abstract class is implemented by built-in interpolators accessible as static classes.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Interpolator.BezierInterpolator Bezier curve interpolator.

Field Summary

Fields

Modifier and Type	Field and Description
static Interpolator	LINEAR Linear interpolation x = interpolate(x)
static Interpolator	LOG2 Log2 interpolation Math.log(1 + x)/Math.log(2) = interpolate(x)

Constructor Summary

Constructors

Constructor and Description
Interpolator()

Method Summary

Modifier and Type	Method and Description
abstract float	interpolate(float x) This function takes an input value between 0 and 1 and returns another value, also between 0 and 1.
static Interpolator	newBezierInterpolator(float px1, float py1, float px2, float py2) Builds a bezier interpolator with two control points (px1, py1) and (px2, py2).

Methods inherited from class java.lang.Object

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

Field Detail

LINEAR

public static final Interpolator LINEAR

Linear interpolation x = interpolate(x)

LOG2

public static final Interpolator LOG2

Log2 interpolation Math.log(1 + x)/Math.log(2) = interpolate(x)

Constructor Detail

Interpolator

public Interpolator()

Method Detail

newBezierInterpolator

public static Interpolator newBezierInterpolator(float px1,
                                                 float py1,
                                                 float px2,
                                                 float py2)

Builds a bezier interpolator with two control points (px1, py1) and (px2, py2). The points should all be in range [0, 1].

Parameters:

px1 - the x-coordinate of first control point, between [0, 1]

py1 - the y-coordinate of first control point, between [0, 1]

px2 - the x-coordinate of second control point, between [0, 1]

py2 - the y-coordinate of second control point, between [0, 1]

Returns:

new bezier interpolator

interpolate

public abstract float interpolate(float x)

This function takes an input value between 0 and 1 and returns another value, also between 0 and 1.

Parameters:

x - a value between 0 and 1

Returns:

a value between 0 and 1. Values outside of this boundary may be clamped to the interval [0,1] and cause undefined results.