penner/README.md

Penner's easing equations, in JavaScript

# penner

A library for Penner's easing equations

## what?

See http://upshots.org/actionscript/jsas-understanding-easing

## usage

```js
var t = 0,		// current time (ms, s, frames, ...)
	b = 10,		// initial value
	c = 100,	// change in value (final value - initial value)
	d = 2		// duration (same units as t)
	value = penner.easeOutQuad(t, b, c, d);
```

## included easing functions

`linear` `easeInQuad` `easeOutQuad` `easeInOutQuad` `easeInCubic` `easeOutCubic` `easeInOutCubic` `easeInQuart` `easeOutQuart` `easeInOutQuart` `easeInQuint` `easeOutQuint` `easeInOutQuint` `easeInSine` `easeOutSine` `easeInOutSine` `easeInExpo` `easeOutExpo` `easeInOutExpo` `easeInCirc` `easeOutCirc` `easeInOutCirc` `easeInElastic` `easeOutElastic` `easeInOutElastic` `easeInBack` `easeOutBack` `easeInOutBack` `easeInBounce` `easeOutBounce` `easeInOutBounce`

## size

|						|				|
|-----------------------|---------------|
| Raw					| 7880 bytes	|
| Uglified				| 3200 bytes	|
| Uglified + gzipped	| 865 bytes		|

## environment support

Any browser (as `window.penner`), AMD, CommonJS, NodeJS