BezierEase

(Beta)

Package	fl.motion
Class	public class BezierEase
Inheritance	BezierEase Object
Implements	ITween

Language Version:

ActionScript 3.0

Product Version:

Flash CS3

Runtime Versions:

Flash Player 9.0.28.0, AIR 1.0

The BezierEase class provides precise easing control for a motion tween between two keyframes. You can apply an instance of this class to all properties of a keyframe at once, or you can define different curves for different properties.

Both this class and the CustomEase class use one or more cubic Bezier curves to define the interpolation. However, the BezierEase class defines its coordinates slightly differently than the CustomEase class.

The BezierEase class uses literal values for the y coordinates of the curve, rather than normalized values between 0 and 1. This allows you to create curves that cannot be created with custom easing. For example, you can create a curve where the start and end values are identical, but the curve rises and falls in between those values. Also, depending on the context, you may want to define the easing curve with literal values instead of percentages.

Default MXML Propertypoints

Related API Elements

Motion XML Elements
CustomEase class

Public Properties

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	Property		Defined By
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		points : Array An ordered collection of points in the custom easing curve.	BezierEase
		target : String The name of the animation property to target.	BezierEase

Public Methods

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	Method		Defined By
		BezierEase(xml:XML = null) Constructor for BezierEase instances.	BezierEase
		getValue(time:Number, begin:Number, change:Number, duration:Number):Number Calculates an interpolated value for a numerical property of animation, using a Bezier easing curve.	BezierEase
		hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined.	Object
		isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.	Object
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations.	Object
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns the string representation of the specified object.	Object
		valueOf():Object Returns the primitive value of the specified object.	Object

Property Detail

Constructor Detail

Method Detail

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	`time:Number` — The time value, which must be between `0` and `duration`, inclusive. The unit can be freely chosen (for example, frames, seconds, milliseconds), but must match the `duration` unit.

	`begin:Number` — The value of the animation property at the start of the tween, when time is `0`.

	`change:Number` — The change in the value of the animation property over the course of the tween. This value can be positive or negative. For example, if an object rotates from 90 to 60 degrees, the `change` is `-30`.

	`duration:Number` — The length of time for the tween. This value must be greater than zero. The unit can be freely chosen (for example, frames, seconds, milliseconds), but must match the `time` unit.

BezierEase - AS3 Flash

Packagesx

Language Elements

Appendixes

Package fl.motion

points

target

getValue