EaseInOutBase

Package	spark.effects.easing
Class	public class EaseInOutBase
Inheritance	EaseInOutBase Object
Implements	IEaser
Subclasses	Power, Sine

Language Version:

ActionScript 3.0

Product Version:

Flex 4

Runtime Versions:

Flash Player 10, AIR 1.5

The EaseInOutBase class is the base class that provide easing capability. The EaseInOutBase class defines easing as consisting of two phases: the acceleration, or ease in phase, followed by the deceleration, or ease out phase. The default behavior of this class returns a linear interpolation for both easing phases. You can create a subclass of EaseInOutBase to get more interesting behavior.

MXML Syntax expanded

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The <s:EaseInOutBase> tag inherits all of the tag attributes of its of its superclass, and adds the following tag attributes:

  <s:EaseInOutBase
    id="ID"
    easeInFraction="0.5"
   />

More examples

Using Spark easing classes

Public Properties

	Property		Defined By
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		easeInFraction : Number The percentage of an animation that should be spent accelerating.	EaseInOutBase

Public Methods

	Method		Defined By
		EaseInOutBase(easeInFraction:Number = NaN) Constructor.	EaseInOutBase
		ease(fraction:Number):Number Takes the fraction representing the elapsed duration of an animation (a value between 0.0 to 1.0) and returns a new elapsed value.	EaseInOutBase
		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

Protected Methods

	Method		Defined By
		easeIn(fraction:Number):Number Returns a value that represents the eased fraction during the ease in phase of the animation.	EaseInOutBase
		easeOut(fraction:Number):Number Returns a value that represents the eased fraction during the ease out phase of the animation.	EaseInOutBase

Property Detail

easeInFraction

property

easeInFraction:Number

Language Version:

ActionScript 3.0

Product Version:

Flex 4

Runtime Versions:

Flash Player 10, AIR 1.5

The percentage of an animation that should be spent accelerating. This factor sets an implicit "easeOut" parameter, equal to (1 - easeIn), so that any time not spent easing in is spent easing out. For example, to have an easing equation that spends half the time easing in and half easing out, set easeIn to .5.

Valid values are between 0.0 and 1.0.

The default value is .5.

Implementation
public function get easeInFraction():Number
public function set easeInFraction(value:Number):void

Constructor Detail

EaseInOutBase

()

Constructor

public function EaseInOutBase(easeInFraction:Number = NaN)

Language Version:

ActionScript 3.0

Product Version:

Flex 4

Runtime Versions:

Flash Player 10, AIR 1.5

Constructor.

Parameters

easeInFraction:Number (default = NaN) — Sets the value of the easeInFraction property. The default value is EasingFraction.IN_OUT, which eases in for the first half of the time and eases out for the remainder.

Method Detail

ease

()

method

public function ease(fraction:Number):Number

Language Version:

ActionScript 3.0

Product Version:

Flex 4

Runtime Versions:

Flash Player 10, AIR 1.5

Takes the fraction representing the elapsed duration of an animation (a value between 0.0 to 1.0) and returns a new elapsed value. This value is used to calculate animated property values. By changing the value of the elapsed fraction, you effectively change the animation of the property. For EaseInOutBase, this method calculates the eased fraction value based on the easeInFraction property. If fraction is less than easeInFraction, this method calls the easeIn() method. Otherwise it calls the easeOut() method. It is expected that these functions are overridden in a subclass.

Parameters

fraction:Number — The elapsed fraction of the animation.

Returns

Number — The eased fraction of the animation.

easeIn

()

method

protected function easeIn(fraction:Number):Number

Language Version:

ActionScript 3.0

Product Version:

Flex 4

Runtime Versions:

Flash Player 10, AIR 1.5

Returns a value that represents the eased fraction during the ease in phase of the animation. The value returned by this class is simply the fraction itself, which represents a linear interpolation of the fraction. More interesting behavior is implemented by subclasses of EaseInOutBase.

Parameters

fraction:Number — The fraction elapsed of the easing in phase of the animation, between 0.0 and 1.0.

Returns

Number — A value that represents the eased value for this phase of the animation.

easeOut

()

method

protected function easeOut(fraction:Number):Number

Language Version:

ActionScript 3.0

Product Version:

Flex 4

Runtime Versions:

Flash Player 10, AIR 1.5

Returns a value that represents the eased fraction during the ease out phase of the animation. The value returned by this class is simply the fraction itself, which represents a linear interpolation of the fraction. More interesting behavior is implemented by subclasses of EaseInOutBase.

Parameters

fraction:Number — The fraction elapsed of the easing out phase of the animation, between 0.0 and 1.0.

Returns

Number — A value that represents the eased value for this phase of the animation.

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EaseInOutBase - AS3 Flex

Classes x

easeInFraction

EaseInOutBase

ease

easeIn

easeOut