168 lines
5.7 KiB
HTML
168 lines
5.7 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 11-4
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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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ctx.canvas.width = window.innerWidth;
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ctx.canvas.height = window.innerHeight;
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var height = 70;
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var dt = .2;
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var omega = 1;
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var nk = 1;
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var k = nk * Math.PI / 80;
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var eps = 5;
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var mmax = 40;
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var nx = 20;
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var ny = 6;
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var dxy = 80 / nx;
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var dd = 2 * dxy * ny;
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var stepX = 0.1;
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var stepY = 0.1;
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var clp = "#0000ff";
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var otherColor = "#ff0000";
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var cll = "#000000";
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var xPos = -45;
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var yPos = -30;
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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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function fnpsix(x, y, t)
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{
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return -eps * Math.sin(k * x) * Math.cosh(k * y) * Math.cos(t);
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}
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function fnpsiy(x, y, t)
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{
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return eps * Math.cos(k * x) * Math.sinh(k * y) * Math.cos(t);
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}
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xp = new Array(nx + 1);
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yp = new Array(nx + 1);
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for (ix = 0; ix <= nx; ix++)
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{
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xp[ix] = new Array(ny + 1);
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yp[ix] = new Array(ny + 1);
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for (iy = 0; iy <= ny; iy++)
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{
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xp[ix][iy] = new Array(mmax + 1);
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yp[ix][iy] = new Array(mmax + 1);
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for (im = 0; im <= mmax; im++)
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{
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xp[ix][iy][im] = ix * dxy + fnpsix(ix * dxy, iy * dxy, 2 * Math.PI * im / mmax);
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yp[ix][iy][im] = iy * dxy + fnpsiy(ix * dxy, iy * dxy, 2 * Math.PI * im / mmax);
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}
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}
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}
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function continuousXp(ix, iy, im)
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{
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return ix * dxy + fnpsix(ix * dxy, iy * dxy, 2 * Math.PI * im / mmax);
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}
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function continuousYp(ix, iy, im)
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{
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return iy * dxy + fnpsiy(ix * dxy, iy * dxy, 2 * Math.PI * im / mmax);
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}
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var m = 1;
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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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Draw();
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m += 1;
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if (m > mmax)
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{
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m = 1;
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}
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setTimeout(Update, 1000/60)
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}
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function Draw()
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{
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Clear(ctx);
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ctx.strokeStyle = cll;
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ctx.beginPath();
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ctx.moveTo(xPos - 1, yPos - 1);
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ctx.lineTo(xPos + 81, yPos - 1);
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ctx.stroke();
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ctx.beginPath();
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ctx.moveTo(xPos - 1, yPos - 1);
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ctx.lineTo(xPos - 1, yPos + dd + 1);
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ctx.stroke();
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ctx.beginPath();
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ctx.moveTo(xPos + 81, yPos - 1);
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ctx.lineTo(xPos + 81, yPos + dd + 1);
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ctx.stroke();
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ctx.beginPath();
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ctx.moveTo(xPos - 1, yPos + dd + 1);
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ctx.lineTo(xPos + 81, yPos + dd + 1);
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ctx.stroke();
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for (ix = 0; ix <= nx; ix += stepX)
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{
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for (iy = 0; iy <= ny; iy += stepY)
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{
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ctx.fillStyle = clp;
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ctx.beginPath();
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ctx.fillRect(xPos - 0.5 + continuousXp(ix, iy, m), yPos - 0.5 + continuousYp(ix, iy, m), 1, 1);
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ctx.stroke();
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}
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}
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for (ix = 0; ix <= nx; ix += stepX)
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{
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for (iy = 0; iy <= ny; iy += stepY)
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{
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ctx.fillStyle = otherColor;
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ctx.beginPath();
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ctx.fillRect(xPos + 80 - 0.5 - continuousXp(ix, iy, m), yPos - 0.5 + dd - continuousYp(ix, iy, m), 1, 1);
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ctx.stroke();
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}
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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> |