JavaScript tweening engine for easy animations, incorporating optimised Robert Penner's equations.
var coords = { x: 0, y: 0 };
var tween = new TWEEN.Tween(coords)
.to({ x: 100, y: 100 }, 1000)
.onUpdate(function() {
console.log(this.x, this.y);
})
.start();
requestAnimationFrame(animate);
function animate(time) {
requestAnimationFrame(animate);
TWEEN.update(time);
}
Download the library and include it in your code:
<script src="js/Tween.js"></script>
You can also reference a CDN-hosted version in your code, thanks to cdnjs. For example:
<script src="https://cdnjs.cloudflare.com/ajax/libs/tween.js/16.3.5/Tween.min.js"></script>
See tween.js for more versions.
npm install tween.js
Then include the Tween.js module with the standard node.js require
:
var TWEEN = require('tween.js');
And you can use Tween.js as in all other examples--for example:
var t = new TWEEN.Tween( /* etc */ );
t.start();
You will need to use a tool such as browserify
to convert code using this style into something that can be run in the browser (browsers don't know about require
).
bower install tweenjs --save
or install an specific tag. They are git tags, and you can run git tag
in the command line for a list if you have cloned the repository locally, or you can also check out the list in the tween.js tags page. For example, to install v16.3.0
:
bower install tweenjs#v16.3.0
Then reference the library source:
<script src="bower_components/tweenjs/src/Tween.js"></script>
- Does one thing and one thing only: tween properties
- Doesn't take care of CSS units (e.g. appending
px
) - Doesn't interpolate colours
- Easing functions are reusable outside of Tween
- Can also use custom easing functions
- User guide
- Tutorial using tween.js with three.js
- Also: libtween, a port of tween.js to C by jsm174
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Custom functions (source) |
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Stop all chained tweens (source) |
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Yoyo (source) |
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Relative values (source) |
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Repeat (source) |
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Dynamic to (source) |
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Array interpolation (source) |
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Video and time (source) |
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Simplest possible example (source) |
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Graphs (source) |
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Black and red (source) |
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Bars (source) |
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hello world (source) |
You need to install npm
first--this comes with node.js, so install that one first. Then, cd to tween.js
's directory and run:
npm install
if running the tests for the first time, to install additional dependencies for running tests, and then run
npm test
every time you want to run the tests.
If you want to add any feature or change existing features, you must run the tests to make sure you didn't break anything else. If you send a PR to add something new and it doesn't have tests, or the tests don't pass, the PR won't be accepted. See contributing for more information.