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06_array_interpolation.html
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06_array_interpolation.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Tween.js / array interpolation</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>06 _ array interpolation</h2>
<p>The different interpolations if arrays are used as values.</p>
</div>
<div id="target"></div>
<script src="../dist/tween.umd.js"></script>
<script src="js/RequestAnimationFrame.js"></script>
<script>
init()
animate()
function init() {
var target = document.getElementById('target')
var width = 240,
height = 160
// random points
/*
var x0 = Math.random() * ( width - 40 ) + 20,
y0 = Math.random() * ( height - 40 ) + 20,
xA = [],
yA = [];
for ( var i = 0; i < 10; i++ ) {
xA.push( Math.random() * ( width - 40 ) + 20 );
yA.push( Math.random() * ( height - 40 ) + 20 );
}
*/
// fixed points
var min = 1 / 6,
max = 5 / 6
var x0 = width * min,
y0 = height / 2,
xA = [width * max, width / 2],
yA = [height * min, height * max]
target.appendChild(createPath('Linear', TWEEN.Interpolation.Linear))
target.appendChild(createPath('Bezier', TWEEN.Interpolation.Bezier))
target.appendChild(createPath('CatmullRom', TWEEN.Interpolation.CatmullRom))
target.appendChild(document.createElement('br'))
xA.push(x0)
yA.push(y0)
target.appendChild(createPath('start === end', TWEEN.Interpolation.Linear))
target.appendChild(createPath('', TWEEN.Interpolation.Bezier))
target.appendChild(createPath('', TWEEN.Interpolation.CatmullRom))
function createPath(title, interpolation) {
var div = document.createElement('div')
div.style.display = 'inline-block'
div.style.width = width + 20 + 'px'
div.style.height = height + 20 + 'px'
var canvas = document.createElement('canvas')
canvas.width = width
canvas.height = height
var context = canvas.getContext('2d')
context.fillStyle = 'rgb(250,250,250)'
context.fillRect(0, 0, width, height)
context.fillStyle = 'rgb(200,200,200)'
context.fillRect(x0 - 3, y0 - 3, 6, 6)
context.fillRect(xA[xA.length - 1] - 3, yA[yA.length - 1] - 3, 6, 6)
for (var i = 0; i < xA.length; i++) {
context.fillRect(xA[i] - 2, yA[i] - 2, 4, 4)
}
context.lineWidth = 2
context.strokeStyle = 'rgba(255,127,127,0.9)'
var obj = {x: x0, y: y0, old: {x: x0, y: y0}}
new TWEEN.Tween(obj)
.to({x: xA, y: yA}, 3000)
.onUpdate(function (object) {
context.beginPath()
context.moveTo(object.old.x, object.old.y)
context.lineTo(object.x, object.y)
context.closePath()
context.stroke()
object.old.x = object.x
object.old.y = object.y
})
.interpolation(interpolation)
.easing(TWEEN.Easing.Linear.None)
.delay(250)
.start()
div.appendChild(document.createTextNode(title))
div.appendChild(document.createElement('br'))
div.appendChild(canvas)
return div
}
}
function animate(time) {
requestAnimationFrame(animate)
TWEEN.update(time)
}
</script>
</body>
</html>