222 lines
7.2 KiB
HTML
222 lines
7.2 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 11-2
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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 l1 = 20;
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var n1 = 3;
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var n2 = 2;
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var l2 = l1 * n1/n2;
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var theta1 = .5;
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var theta2 = Math.atan(n1 * Math.sin(theta1) / n2 / Math.sqrt(1 - (Math.pow(n1 * Math.sin(theta1) / n2 , 2))));
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var clv = "#ff0000";
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var cll = "#00ff00";
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var clb = "#0000ff";
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var xPos = 0;
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var yPos = -35;
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var xPosA = 10;
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var yPosA = -35;
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var xPosB = -15;
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var yPosB = -15;
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var height = 75;
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var ttheta1 = Math.tan(theta1);
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var ttheta2 = Math.tan(theta2);
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var d1 = height * ttheta1;
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var d2 = height * ttheta2;
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var l1c = l1 / Math.cos(theta1);
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var l2c = l2 / Math.cos(theta2);
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var vc = l1 / Math.sin(theta1);
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var kx1 = 10 * Math.cos(theta1) * n1;
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var ky1 = 10 * Math.sin(theta1) * n1;
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var kx11 = kx1 - 3 * Math.cos(theta1 - Math.PI / 6);
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var ky11 = ky1 - 3 * Math.sin(theta1 - Math.PI / 6);
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var kx12 = kx1 - 3 * Math.cos(theta1 + Math.PI / 6);
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var ky12 = ky1 - 3 * Math.sin(theta1 + Math.PI / 6);
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var kx2 = 10 * Math.cos(theta2) * n2;
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var ky2 = 10 * Math.sin(theta2) * n2;
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var kx21 = kx2 - 3 * Math.cos(theta2 - Math.PI / 6);
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var ky21 = ky2 - 3 * Math.sin(theta2 - Math.PI / 6);
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var kx22 = kx2 - 3 * Math.cos(theta2 + Math.PI / 6);
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var ky22 = ky2 - 3 * Math.sin(theta2 + Math.PI / 6);
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var mmax = 30;
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var m = 1;
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var x1 = l1c * (mmax - m) / mmax;
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var x = x1;
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var xx = 0;
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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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x1 = l1c * (mmax - m) / mmax;
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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 = clb;
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ctx.beginPath();
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ctx.moveTo(xPos, yPos + height);
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ctx.lineTo(xPos, yPos);
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ctx.stroke();
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x = x1;
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thex1loopllp1();
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}
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function thex1loopllp1()
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{
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if (x > 50)
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{
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outx1loopllp1();
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return;
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}
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ctx.strokeStyle = cll
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ctx.beginPath();
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ctx.moveTo(xPos - x, yPos);
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ctx.lineTo(xPos - x - d1, yPos + height);
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ctx.stroke();
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x += l1c;
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thex1loopllp1();
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}
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function outx1loopllp1()
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{
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x -= l1c;
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y = vc - x1 / ttheta1;
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they1loopllp1();
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}
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function they1loopllp1()
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{
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if (y > height)
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{
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outy1loopllp1();
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return;
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}
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ctx.beginPath();
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ctx.moveTo(xPos, yPos + y);
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ctx.lineTo(xPos - d1, yPos + y + height);
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ctx.stroke();
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ctx.beginPath();
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ctx.moveTo(xPos, yPos + y);
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ctx.lineTo(xPos + d2, yPos + y - height);
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ctx.stroke();
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y += vc;
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they1loopllp1();
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}
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function outy1loopllp1()
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{
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y -= vc;
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xx = l2c - (height - y) * ttheta2;
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thex2loopllp1();
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}
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function thex2loopllp1()
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{
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if (xx > 50)
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{
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outx2loopllp1();
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return;
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}
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ctx.beginPath();
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ctx.moveTo(xx + xPos, yPos + height);
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ctx.lineTo(xPos + xx + d2, yPos);
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ctx.stroke();
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xx += l2c;
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thex2loopllp1();
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}
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function outx2loopllp1()
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{
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ctx.strokeStyle = clv;
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ctx.beginPath();
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ctx.moveTo(xPosA - 40, yPosA + 20);
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ctx.lineTo(xPosA - 40 + kx1, yPosA + 20 + ky1);
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ctx.stroke();
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ctx.beginPath();
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ctx.moveTo(xPosB + 20, yPosB + 20);
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ctx.lineTo(xPosB + 20 + kx2, yPosB + 20 + ky2);
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ctx.stroke();
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ctx.beginPath();
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ctx.moveTo(xPosA + kx1 - 40, yPosA + ky1 + 20);
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ctx.lineTo(xPosA - 40 + kx11, yPosA + 20 + ky11);
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ctx.stroke();
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ctx.beginPath();
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ctx.moveTo(xPosA + kx1 - 40, yPosA + ky1 + 20);
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ctx.lineTo(xPosA - 40 + kx12, yPosA + 20 + ky12);
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ctx.stroke();
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ctx.beginPath();
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ctx.moveTo(xPosB + kx2 + 20, yPosB + ky2 + 20);
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ctx.lineTo(xPosB + 20 + kx21, yPosB + 20 + ky21);
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ctx.stroke();
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ctx.beginPath();
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ctx.moveTo(xPosB + kx2 + 20, yPosB + ky2 + 20);
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ctx.lineTo(xPosB + 20 + kx22, yPosB + 20 + ky22);
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ctx.stroke();
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ctx.clearRect(-c.width, -c.height, c.width * 2, (c.height + yPos));
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ctx.clearRect(-c.width, yPos + height, c.width * 2, c.height * 2);
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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> |