mirror of
https://github.com/tweenjs/tween.js.git
synced 2025-12-08 20:16:12 +00:00
98 lines
2.7 KiB
HTML
98 lines
2.7 KiB
HTML
<!doctype html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>Tween.js / graphs for custom easing functions</title>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
|
|
<style>
|
|
body {
|
|
margin: 0px;
|
|
}
|
|
|
|
#target {
|
|
font-size: 13px;
|
|
padding: 0px 32px;
|
|
}
|
|
</style>
|
|
<link href="css/style.css" media="screen" rel="stylesheet" type="text/css" />
|
|
</head>
|
|
<body>
|
|
<div id="info" style="position: relative">
|
|
<h1><a href="http://github.com/tweenjs/tween.js">tween.js</a></h1>
|
|
<h2>12 _ graphs for custom easing functions</h2>
|
|
<p>
|
|
A version of the <a href="03_graphs.html">graphs</a> example, but using custom easing functions (not included in
|
|
<a href="https://github.com/tween.js/tween.js">tween.js</a> by default).
|
|
</p>
|
|
</div>
|
|
|
|
<div id="target"></div>
|
|
|
|
<script src="../dist/tween.umd.js"></script>
|
|
<script src="js/createGraph.js"></script>
|
|
<script>
|
|
window.addEventListener('load', function () {
|
|
init()
|
|
animate()
|
|
})
|
|
|
|
function init() {
|
|
var target = document.getElementById('target')
|
|
|
|
target.appendChild(createGraph('Ten Steps', tenStepsEasing))
|
|
|
|
target.appendChild(document.createElement('br'))
|
|
|
|
for (var i = 0; i < 4; i++) {
|
|
var numSteps = (i + 1) * 4
|
|
target.appendChild(createGraph(numSteps + ' steps', createStepFunction(numSteps)))
|
|
}
|
|
|
|
target.appendChild(document.createElement('br'))
|
|
|
|
target.appendChild(createGraph('Random', randomEasing))
|
|
|
|
target.appendChild(document.createElement('br'))
|
|
|
|
target.appendChild(
|
|
createGraph('Noisy Exponential.InOut', createNoisyEasing(0.1, TWEEN.Easing.Exponential.InOut)),
|
|
)
|
|
target.appendChild(createGraph('Noisy Elastic.InOut', createNoisyEasing(0.1, TWEEN.Easing.Elastic.InOut)))
|
|
target.appendChild(createGraph('Noisy Circular.InOut', createNoisyEasing(0.1, TWEEN.Easing.Circular.InOut)))
|
|
}
|
|
|
|
function animate() {
|
|
requestAnimationFrame(animate)
|
|
|
|
TWEEN.update()
|
|
}
|
|
|
|
function tenStepsEasing(k) {
|
|
return Math.floor(k * 10) / 10
|
|
}
|
|
|
|
// This is where we get very meta and write a function for
|
|
// generating functions! The returned function is similar to
|
|
// the tenStepsEasing function above, but the number of steps
|
|
// is passed as a parameter
|
|
function createStepFunction(numSteps) {
|
|
return function (k) {
|
|
return Math.floor(k * numSteps) / numSteps
|
|
}
|
|
}
|
|
|
|
function randomEasing(k) {
|
|
return Math.random()
|
|
}
|
|
|
|
// Getting meta again: why not use existing functions as the
|
|
// base for new easing functions?
|
|
function createNoisyEasing(randomProportion, easingFunction) {
|
|
var normalProportion = 1.0 - randomProportion
|
|
return function (k) {
|
|
return randomProportion * Math.random() + normalProportion * easingFunction(k)
|
|
}
|
|
}
|
|
</script>
|
|
</body>
|
|
</html>
|