https://github.com/rook2pawn/node-easing

https://rook2pawn.github.io/node-easing easing functions without the unnecessary framework cruft
https://github.com/rook2pawn/node-easing

Last synced: about 2 months ago
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https://rook2pawn.github.io/node-easing easing functions without the unnecessary framework cruft

• Host: GitHub
• URL: https://github.com/rook2pawn/node-easing
• Owner: rook2pawn
• Created: 2011-11-11T14:07:17.000Z (almost 13 years ago)
• Default Branch: master
• Last Pushed: 2019-03-28T12:12:43.000Z (over 5 years ago)
• Last Synced: 2024-07-19T15:48:00.571Z (2 months ago)
• Language: JavaScript
• Homepage:
• Size: 1.15 MB
• Stars: 32
• Watchers: 3
• Forks: 5
• Open Issues: 2
• Metadata Files:
  • Readme: README.md

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![easing](https://github.com/rook2pawn/node-easing/raw/master/graph.png)

# easing

```js

    const Easing = require('easing')

    const x = Easing(11,'linear')

    // [ 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 ]

    const y = Easing(11,'quadratic')

    // [ 0, 0.01, 0.04, 0.09, 0.16, 0.25, 0.36, 0.49, 0.64, 0.81, 1 ]

```

## install

    npm install --save easing

## On the client

### drop it in

Simply include `browser-easing.js` and you can directly use the Easing function globally

```html

    

    

    var x = Easing(11,'cubic');

    console.log(x)

    

```

### or with browserify

    const Easing = require('easing')

## Types of Easing

### Linear

For an array of 42 values that are linear,

    Easing(42,'linear')

### Quadratic

For an array of 100 values that are quadratic,

    Easing(100,'quadratic')

### Cubic

For an array of 42 cubic values,

    Easing(42,'cubic')

### Quartic

For an array of 1492 quartic values,

    Easing(1492,'quartic')

### Quintic

    Easing(25,'quintic')

### Sinusoidal

    Easing(333,'sinusoidal')

    Easing(333,'sin')

### Circular

    Easing(314,'circular')

### Exponential

    Easing(81,'exponential')

## options

### endToEnd

If we wanted to go from 0 to 1 back to 0 quadratically, simply call

    Easing(100,'quadratic',{endToEnd:true});

### invert

If we want to go from 1 to 0 (or 1 to 0 back to 1) instead of 0 to 1, say 'linear' style, simply call

    Easing(100,'linear',{invert:true});

You can mix and match these options.

## additional interfaces

### Event interface

```js

    const Easing = require('easing')

    const x = Easing.event(11,'linear')

    x.on('data', (data) => { ... })

```

### Stream interface

```js

    const Easing = require('easing')

    const x = Easing.stream(11,'linear')

    x.pipe(process.stdout)

```

These two interfaces have their own options `duration` and `repeat` that you can also mix and match.

These two interfaces can take one or all of these options

* invert : boolean

* endToEnd : boolean

* duration : integer (milliseconds, defaults to 1000)

* repeat : boolean (default false)

## LICENSE

MIT