Package icyllis.modernui.animation

Class BezierInterpolator

java.lang.Object

icyllis.modernui.animation.BezierInterpolator

All Implemented Interfaces:

TimeInterpolator

public class BezierInterpolator
extends Object
implements TimeInterpolator

An interpolator that can traverse a Bezier curve that extends from (0, 0) to (1, 1). The x coordinate along the curve is the input value and the output is the y coordinate of the line at that point.

See MotionEasingUtils for commonly-used interpolators.

Since:

3.12

Field Summary

Fields inherited from interface icyllis.modernui.animation.TimeInterpolator

ACCELERATE, ACCELERATE_DECELERATE, ANTICIPATE, ANTICIPATE_OVERSHOOT, BOUNCE, DECELERATE, DECELERATE_CUBIC, DECELERATE_QUINTIC, LINEAR, OVERSHOOT, SINE, VISCOUS_FLUID

Constructor Summary

Constructors

Constructor	Description
BezierInterpolator(float controlX, float controlY)	Create an interpolator for a quadratic Bezier curve.
BezierInterpolator(float controlX1, float controlY1, float controlX2, float controlY2)	Create an interpolator for a cubic Bezier curve.

Method Summary

Modifier and Type	Method	Description
static BezierInterpolator	createTwoCubic(float controlX1, float controlY1, float controlX2, float controlY2, float controlX3, float controlY3, float controlX4, float controlY4, float controlX5, float controlY5)	Create an interpolator for two cubic Bezier curves.
float	getInterpolation(float t)	Using the curve in this interpolator that can be described as y = f(x), finds the y coordinate of the line given t as the x coordinate.

Methods inherited from class java.lang.Object

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

Constructor Details

BezierInterpolator

public BezierInterpolator(float controlX,
 float controlY)

Create an interpolator for a quadratic Bezier curve. The end points (0, 0) and (1, 1) are assumed.

Parameters:

controlX - The x coordinate of the quadratic Bezier control point.

controlY - The y coordinate of the quadratic Bezier control point.

BezierInterpolator

public BezierInterpolator(float controlX1,
 float controlY1,
 float controlX2,
 float controlY2)

Create an interpolator for a cubic Bezier curve. The end points (0, 0) and (1, 1) are assumed.

Parameters:

controlX1 - The x coordinate of the first control point of the cubic Bezier.

controlY1 - The y coordinate of the first control point of the cubic Bezier.

controlX2 - The x coordinate of the second control point of the cubic Bezier.

controlY2 - The y coordinate of the second control point of the cubic Bezier.

Method Details

createTwoCubic

@NonNull
public static BezierInterpolator createTwoCubic(float controlX1,
 float controlY1,
 float controlX2,
 float controlY2,
 float controlX3,
 float controlY3,
 float controlX4,
 float controlY4,
 float controlX5,
 float controlY5)

Create an interpolator for two cubic Bezier curves. The end points (0, 0) and (1, 1) are assumed.

The first cubic Bezier is formed by (0, 0), (controlX1, controlY1), (controlX2, controlY2), (controlX3, controlY3); and the second cubic Bezier is formed by (controlX3, controlY3), (controlX4, controlY4), (controlX5, controlY5), (1, 1)

getInterpolation

public float getInterpolation(float t)

Using the curve in this interpolator that can be described as y = f(x), finds the y coordinate of the line given t as the x coordinate. Values less than 0 will always return 0 and values greater than 1 will always return 1.

Specified by:

getInterpolation in interface TimeInterpolator

Parameters:

t - Treated as the x coordinate along the line.

Returns:

The y coordinate of the Path along the line where x = t.

See Also:

• TimeInterpolator.getInterpolation(float)