112 lines
4.3 KiB
HTML
112 lines
4.3 KiB
HTML
<!--
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This work is licensed under CC BY-NC-ND 4.0
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Link to license: http://creativecommons.org/licenses/by-nc-nd/4.0/
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Attribute to Russell Georgi
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-->
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<html>
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<head>
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<title>
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Waves 8-5
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</title>
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<style>
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html, body {
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width: 100%;
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height: 100%;
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margin: 0px;
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border: 0;
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overflow: hidden;
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display: block;
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}
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canvas {
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position: absolute;
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}
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</style>
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</head>
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<body>
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<canvas id="myCanvas" width="1" height="1" style="border:1px solid #ffffff;">
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Your browser does not support the HTML5 canvas tag.</canvas>
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<script>
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var c = document.getElementById("myCanvas");
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var ctx = c.getContext("2d");
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c.width = window.innerWidth;
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c.height = window.innerHeight;
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var kk = 4;
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var kp = 1.3;
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var mm = 60;
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var mmax = 200;
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var nn = 9;
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var cycles = 11/4;
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var nmax = Math.round(2 * nn * cycles / kk);
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var xPos = -50;
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var yPos = -50;
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var m = 1;
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ctx.translate(ctx.canvas.width / 2, ctx.canvas.height / 2)
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ctx.scale(3, -3);
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var ay = 10 / Math.sqrt((Math.cos(kk * Math.PI * nmax / nn) ^ 2 * (1 - Math.exp(-2 * kp * nmax / nn)) ^ 2) + (Math.sin(kk * Math.PI * nmax / nn) ^ 2 * (1 + Math.exp(-2 * kp * nmax / nn)) ^ 2));
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var y1 = new Array(nmax + 1);
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for (n = 0; n < nmax + 1; n++)
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{
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y1[n] = new Array(mm + 1);
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for (m = 0; m < mm + 1; m++)
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{
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y1[n][m] = ay * (Math.exp(-kp * n / nn) * Math.cos(kk * Math.PI * (n / nn - nmax / nn - m/mm)) - Math.exp(-2 * kp * nmax / nn) * Math.exp(kp * n / nn) * Math.cos(kk * Math.PI * (n / nn - nmax / nn + m / mm)));
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}
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}
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function Clear(ctx)
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{
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ctx.clearRect(-c.width, -c.height, c.width * 2, c.height * 2);
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}
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function Update()
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{
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Clear(ctx);
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Draw();
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m += 1;
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console.log(m);
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setTimeout(Update, 1500/60)
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}
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function Draw()
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{
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ctx.strokeStyle = "#cccccc";
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ctx.lineWidth = 0.5;
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ctx.beginPath();
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ctx.moveTo(xPos + 10, yPos + 50);
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ctx.lineTo(xPos + 90, yPos + 50);
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ctx.stroke();
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ctx.strokeStyle = "#000000";
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ctx.lineWidth = 1;
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for (n = 0; n < nmax; n++)
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{
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ctx.beginPath();
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ctx.moveTo(xPos + 90 - 80 * n / nmax, yPos + y1[n][m % mm] + 50);
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ctx.lineTo(xPos + 90 - 80 * (n + 1) / nmax, yPos + y1[(n + 1)][m % mm] + 50);
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ctx.stroke();
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}
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for (n = 1; n < nmax; n++)
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{
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ctx.beginPath();
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ctx.arc(xPos + 90 - 80 * n / nmax, yPos + y1[n][m % mm] + 50, 1, 0, Math.PI * 2);
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ctx.stroke();
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}
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}
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window.addEventListener('resize', function(event) {
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c.width = window.innerWidth;
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c.height = window.innerHeight;
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ctx.translate(c.width / 2, c.height / 2);
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ctx.scale(3, -3);
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}, true);
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Update();
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</script>
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</body>
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<p xmlns:cc="http://creativecommons.org/ns#" style="font-size: 1vw; bottom: 0px; position: absolute;">
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This work is licensed under
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<a href="http://creativecommons.org/licenses/by-nc-nd/4.0/?ref=chooser-v1" target="_blank" rel="license noopener noreferrer" style="display:inline-block;">CC BY-NC-ND 4.0<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg?ref=chooser-v1"><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg?ref=chooser-v1"><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/nc.svg?ref=chooser-v1"><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/nd.svg?ref=chooser-v1"></a></p>
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</html>
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