Adobe® Flex® 4 Language Reference
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mx.effects.easing 
Quadratic 
Packagemx.effects.easing
Classpublic class Quadratic
InheritanceQuadratic Inheritance 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
 PropertyDefined By
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
Public Methods
 MethodDefined By
  
[static] The easeIn() method starts motion from a zero velocity, and then accelerates motion as it executes.
Quadratic
  
[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
  
[static] The easeOut() method starts motion fast, and then decelerates motion to a zero velocity as it executes.
Quadratic
 Inherited
Indicates whether an object has a specified property defined.
Object
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Returns the string representation of this object, formatted according to locale-specific conventions.
Object
 Inherited
Returns the string representation of the specified object.
Object
 Inherited
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.