135 lines
4.2 KiB
HTML
135 lines
4.2 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 6-1
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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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#increase
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{
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width: 50;
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height: 50;
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top: 12.5;
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left: 12.5;
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position: absolute;
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background-image: url(upArrow.png);
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background-repeat: no-repeat;
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background-size: cover;
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}
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#decrease
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{
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width: 50;
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height: 50;
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top: 75;
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left: 12.5;
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position: absolute;
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background-image: url(downArrow.png);
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background-repeat: no-repeat;
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background-size: cover;
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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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<button id = "increase" onclick = "Increase()"></button>
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<button id = "decrease" onclick = "Decrease()"></button>
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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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k = 1;
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a0 = 40;
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a = a0;
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nn = 48;
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mm0 = 24;
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mm = mm0;
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m = 1;
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var xPos = -100;
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var yPos = -75;
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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 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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ctx.strokeStyle = "#000000";
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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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ctx.beginPath();
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ctx.moveTo(xPos + 10, yPos + 80);
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for (n = 0; n < nn; n++)
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{
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ctx.lineTo(xPos + 10 + 160 * (n + 1) / nn, yPos + 80 + a * Math.sin(k * (n+1) * Math.PI / nn) * Math.sin(m / mm));
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}
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ctx.stroke();
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}
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function Increase()
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{
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k += 1;
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if (k > 10)
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{
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k = 10;
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}
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mm = mm0 / k;
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a = a0 / k;
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}
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function Decrease()
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{
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k -= 1;
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if (k <= 0)
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{
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k = 1;
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}
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mm = mm0 / k;
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a = a0 / k;
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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> |