114 lines
3.7 KiB
HTML
114 lines
3.7 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>Whitney Music Box in HTML5</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<!-- midi.js package -->
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<script src="./js/Color/SpaceW3.js" type="text/javascript"></script>
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<script src="./js/MIDI/AudioDetect.js" type="text/javascript"></script>
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<script src="./js/MIDI/LoadPlugin.js" type="text/javascript"></script>
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<script src="./js/MIDI/Plugin.js" type="text/javascript"></script>
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<script src="./js/MIDI/Player.js" type="text/javascript"></script>
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<script src="./js/MusicTheory/Synesthesia.js" type="text/javascript"></script>
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<script src="./js/Widgets/Loader.js" type="text/javascript"></script>
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<script src="./js/Window/Event.js" type="text/javascript"></script>
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<script src="./js/Window/DOMLoader.XMLHttp.js" type="text/javascript"></script>
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<script src="./js/Window/DOMLoader.script.js" type="text/javascript"></script>
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<!-- extras -->
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<script src="./inc/Base64.js" type="text/javascript"></script>
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<script src="./inc/base64binary.js" type="text/javascript"></script>
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<!-- font -->
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<link href="http://fonts.googleapis.com/css?family=Andada" rel="stylesheet" type="text/css" />
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<style>
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body {
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background: #000; color: #fff; font-family: andada; line-height: 1.5em;
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}
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a {
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color: #fff
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}
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</style>
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</head>
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<body>
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Whitney Music Box animation in HTML5.<br>
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Graphics code by <a href="https://github.com/jbum/Whitney-Music-Box-Examples">Jim Bumgardner</a>.<br>
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Audio created with <a href="https://github.com/mudx/MIDI.js">MIDI.js</a><br>
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<canvas id="mycanvas" />
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<script type="text/javascript">
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var dc;
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var nbrPoints = 48;
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var cycleLength = 60 * 3; // 3 minutes
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var gw = 800;
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var gh = 800;
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var cx = gw / 2;
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var cy = gh / 2;
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var circleRadius = (gw / 2) * 0.95;
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var startTime = (new Date()).getTime();
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var PI = 3.1415927;
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var PI2 = PI * 2;
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var tines = [];
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var lastSound = [];
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RefreshFrame = function () {
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dc.clearRect(0, 0, gw, gh);
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dc.lineWidth = 3;
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dc.strokeStyle = '#333';
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dc.beginPath();
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dc.moveTo(cx, cy);
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dc.lineTo(gw, cy);
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dc.stroke();
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var speed = (2 * PI * nbrPoints) / cycleLength;
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var ms = (new Date()).getTime();
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var timer = (ms - startTime) * .001 * speed;
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var maxRad = (gw / 2 - circleRadius) * .75;
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var minRad = maxRad * .2;
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for (var i = 0; i < nbrPoints; ++i) {
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var r = (i + 1) / nbrPoints;
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var a = timer * r;
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var len = circleRadius * (1 + 1.0 / nbrPoints - r);
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if (Math.floor(a / PI2) !== Math.floor(tines[i] / PI2)) {
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MIDI.noteOn(0, i + 21, 100, 0);
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MIDI.noteOn(0, i + 21 + 36, 100, 0);
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lastSound[i] = ms;
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}
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var x = (cx + Math.cos(a) * len);
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var y = (cy + Math.sin(a) * len);
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var radv = minRad + (maxRad - minRad) * (1 - r);
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radv = Math.max((radv + 6) - 6 * (ms - lastSound[i]) / 500.0, radv);
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var huev = r * 360;
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var satv = Math.round(100 * Math.min(1, (ms - lastSound[i]) / 1000.0));
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var lumv = Math.round(100 * Math.max(0.5, 1 - (ms - lastSound[i]) / 1000.0));
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dc.fillStyle = 'hsla(' + huev + ',' + satv + '%,' + lumv + '%,1)';
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dc.beginPath();
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dc.arc(x, y, radv, 0, PI2, false);
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dc.fill();
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tines[i] = a;
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}
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};
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window.onload = function () {
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MIDI.loader = new widgets.Loader;
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MIDI.loadPlugin({
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instrument: "acoustic_grand_piano", // or multiple instruments
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callback: function() {
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MIDI.loader.stop();
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var canvas = document.getElementById('mycanvas');
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canvas.style.width = gw + "px";
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canvas.style.width = gw + "px";
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canvas.width = gw;
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canvas.height = gh;
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dc = canvas.getContext('2d');
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for (var i = 0; i < nbrPoints; ++i) {
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if (i % 7 === 0) MIDI.noteOn(0, i + 21, 100, 0);
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lastSound[i] = 0;
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tines[i] = 0;
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}
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startTime = (new Date()).getTime();
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setInterval(RefreshFrame, 1000 / 30);
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}
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});
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};
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</script>
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</body>
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</html> |