mx.effects.easing.Quadratic - Adobe® Flex® 4 Language Reference (Flex 4)

Package	mx.effects.easing
Class	public class Quadratic
Inheritance	Quadratic Object

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Starting with Flex 4.0, Adobe recommends that you use the spark.effects.easing.Power class as an alternative to this class.

The Spark effects provided as of Flex 4 use classes which implement the IEaser interface instead of the easing functions in classes like Quadratic for the earlier Flex 3 effects. To achieve the same functionality of Quadratic, create a Power instance with an exponent of 2 and set the easeInFraction appropriately to get the desired result.

The Quadratic class defines three easing functions to implement quadratic motion with Flex effect classes. The acceleration of motion for a Quadratic easing equation is slower than for a Cubic or Quartic easing equation. For more information, see http://www.robertpenner.com/profmx.

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
		prototype : Object [static] A reference to the prototype object of a class or function object.	Object

Public Methods

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	Method		Defined By
		easeIn(t:Number, b:Number, c:Number, d:Number):Number [static] The easeIn() method starts motion from a zero velocity, and then accelerates motion as it executes.	Quadratic
		easeInOut(t:Number, b:Number, c:Number, d:Number):Number [static] The easeInOut() method combines the motion of the easeIn() and easeOut() methods to start the motion from a zero velocity, accelerate motion, then decelerate to a zero velocity.	Quadratic
		easeOut(t:Number, b:Number, c:Number, d:Number):Number [static] The easeOut() method starts motion fast, and then decelerates motion to a zero velocity as it executes.	Quadratic
		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

Method Detail

easeIn

()

method

public static function easeIn(t:Number, b:Number, c:Number, d:Number):Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The easeIn() method starts motion from a zero velocity, and then accelerates motion as it executes.

Parameters

	`t:Number` — Specifies time.

	`b:Number` — Specifies the initial position of a component.

	`c:Number` — Specifies the total change in position of the component.

	`d:Number` — Specifies the duration of the effect, in milliseconds.

Returns

Number — Number corresponding to the position of the component.

easeInOut

()

method

public static function easeInOut(t:Number, b:Number, c:Number, d:Number):Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The easeInOut() method combines the motion of the easeIn() and easeOut() methods to start the motion from a zero velocity, accelerate motion, then decelerate to a zero velocity.

Parameters

	`t:Number` — Specifies time.

	`b:Number` — Specifies the initial position of a component.

	`c:Number` — Specifies the total change in position of the component.

	`d:Number` — Specifies the duration of the effect, in milliseconds.

Returns

Number — Number corresponding to the position of the component.

easeOut

()

method

public static function easeOut(t:Number, b:Number, c:Number, d:Number):Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The easeOut() method starts motion fast, and then decelerates motion to a zero velocity as it executes.

Parameters

	`t:Number` — Specifies time.

	`b:Number` — Specifies the initial position of a component.

	`c:Number` — Specifies the total change in position of the component.

	`d:Number` — Specifies the duration of the effect, in milliseconds.

Returns

Number — Number corresponding to the position of the component.