Easing functions for use with TweenCollection.  These function are from
Tween.js and Robert Penner.  See the
Tween.js graphs for each function.
        
        
Members
static constant Cesium.EasingFunction.BACK_IN : EasingFunction.Callback
    Back in.
static constant Cesium.EasingFunction.BACK_IN_OUT : EasingFunction.Callback
    Back in then out.
static constant Cesium.EasingFunction.BACK_OUT : EasingFunction.Callback
    Back out.
static constant Cesium.EasingFunction.BOUNCE_IN : EasingFunction.Callback
    Bounce in.
static constant Cesium.EasingFunction.BOUNCE_IN_OUT : EasingFunction.Callback
    Bounce in then out.
static constant Cesium.EasingFunction.BOUNCE_OUT : EasingFunction.Callback
    Bounce out.
static constant Cesium.EasingFunction.CIRCULAR_IN : EasingFunction.Callback
    Circular in.
static constant Cesium.EasingFunction.CIRCULAR_IN_OUT : EasingFunction.Callback
    Circular in then out.
static constant Cesium.EasingFunction.CIRCULAR_OUT : EasingFunction.Callback
    Circular out.
static constant Cesium.EasingFunction.CUBIC_IN : EasingFunction.Callback
    Cubic in.
static constant Cesium.EasingFunction.CUBIC_IN_OUT : EasingFunction.Callback
    Cubic in then out.
static constant Cesium.EasingFunction.CUBIC_OUT : EasingFunction.Callback
    Cubic out.
static constant Cesium.EasingFunction.ELASTIC_IN : EasingFunction.Callback
    Elastic in.
static constant Cesium.EasingFunction.ELASTIC_IN_OUT : EasingFunction.Callback
    Elastic in then out.
static constant Cesium.EasingFunction.ELASTIC_OUT : EasingFunction.Callback
    Elastic out.
static constant Cesium.EasingFunction.EXPONENTIAL_IN : EasingFunction.Callback
    Exponential in.
static constant Cesium.EasingFunction.EXPONENTIAL_IN_OUT : EasingFunction.Callback
    Exponential in then out.
static constant Cesium.EasingFunction.EXPONENTIAL_OUT : EasingFunction.Callback
    Exponential out.
static constant Cesium.EasingFunction.LINEAR_NONE : EasingFunction.Callback
    Linear easing.
static constant Cesium.EasingFunction.QUADRATIC_IN : EasingFunction.Callback
    Quadratic in.
static constant Cesium.EasingFunction.QUADRATIC_IN_OUT : EasingFunction.Callback
    Quadratic in then out.
static constant Cesium.EasingFunction.QUADRATIC_OUT : EasingFunction.Callback
    Quadratic out.
static constant Cesium.EasingFunction.QUARTIC_IN : EasingFunction.Callback
    Quartic in.
static constant Cesium.EasingFunction.QUARTIC_IN_OUT : EasingFunction.Callback
    Quartic in then out.
static constant Cesium.EasingFunction.QUARTIC_OUT : EasingFunction.Callback
    Quartic out.
static constant Cesium.EasingFunction.QUINTIC_IN : EasingFunction.Callback
    Quintic in.
static constant Cesium.EasingFunction.QUINTIC_IN_OUT : EasingFunction.Callback
    Quintic in then out.
static constant Cesium.EasingFunction.QUINTIC_OUT : EasingFunction.Callback
    Quintic out.
static constant Cesium.EasingFunction.SINUSOIDAL_IN : EasingFunction.Callback
    Sinusoidal in.
static constant Cesium.EasingFunction.SINUSOIDAL_IN_OUT : EasingFunction.Callback
    Sinusoidal in then out.
static constant Cesium.EasingFunction.SINUSOIDAL_OUT : EasingFunction.Callback
    Sinusoidal out.
Type Definitions
    Function interface for implementing a custom easing function.
    
| Name | Type | Description | 
|---|---|---|
| time | Number | The time in the range [0, 1]. | 
Returns:
    The value of the function at the given time.
    
Examples:
function quadraticIn(time) {
    return time * time;
}function quadraticOut(time) {
    return time * (2.0 - time);
}