examples/07a_dynamic_to_two_array_values.html

<!DOCTYPE html>
<html lang="en">
	<head>
		<title>Tween.js / dynamic to interpolation array</title>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
		<style>
			body {
				margin: 0px;
			}

			#scene1,
			#scene2 {
				display: inline-block;
				font-size: 13px;
				padding-right: 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>07a _ dynamic to interpolation array</h2>
			<p>tweening towards two moving targets</p>

			<div id="scene1">
				<p><code>.dynamic(false)</code></p>
			</div>
			<div id="scene2">
				<p><code>.dynamic(true)</code></p>
			</div>
		</div>

		<script src="../dist/tween.umd.js"></script>
		<script src="js/RequestAnimationFrame.js"></script>
		<script type="module">
			import {drawRabbit, drawFox} from './js/drawings.js'

			startScene('scene1', false)
			startScene('scene2', true)

			function startScene(id, dynamic) {
				var context
				var width
				var height
				var rabbit1
				var rabbit2
				var fox

				init()
				animate()

				function init() {
					width = 480
					height = 320

					var scene = document.getElementById(id)

					var canvas = document.createElement('canvas')
					canvas.width = width
					canvas.height = height
					scene.appendChild(canvas)

					context = canvas.getContext('2d')

					rabbit1 = {
						x: width * 0.8,
						y: 50,
					}

					new TWEEN.Tween(rabbit1)
						.to({x: width / 2, y: height - 50}, 2000)
						.easing(TWEEN.Easing.Cubic.InOut)
						.onUpdate(function ({x, y}) {
							rabbits.x[1] = x
							rabbits.y[1] = y
						})
						.start()

					rabbit2 = {
						x: width - 50,
						y: height - 50,
					}

					new TWEEN.Tween(rabbit2)
						.to({x: width / 3, y: 50}, 3000)
						.easing(TWEEN.Easing.Cubic.InOut)
						.onUpdate(function ({x, y}) {
							rabbits.x[2] = x
							rabbits.y[2] = y
						})
						.start()

					var rabbits = {
						x: [rabbit1.x, rabbit2.x],
						y: [rabbit1.y, rabbit2.y],
					}

					fox = {
						x: 50,
						y: 50,
					}

					new TWEEN.Tween(fox).to(rabbits, 3000).dynamic(dynamic).interpolation(TWEEN.Interpolation.CatmullRom).start()
				}

				function animate(time) {
					TWEEN.update(time)

					context.fillStyle = 'rgb(240,250,240)'
					context.fillRect(0, 0, width, height)

					drawRabbit(context, rabbit1.x, rabbit1.y, 'rgb(0,0,150)')
					drawRabbit(context, rabbit2.x, rabbit2.y, 'rgb(0,80,80)')
					drawFox(context, fox.x, fox.y, 'rgb(200,80,80)')

					requestAnimationFrame(animate)
				}
			}
		</script>
	</body>
</html>