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2021-08-18 19:24:55 -07:00
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<!--
This work is licensed under CC BY-NC-ND 4.0
Link to license: http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribute to Russell Georgi
-->
<html>
<head>
<title>
Waves 7-2
</title>
<link rel="stylesheet" href="/rmg/waves7-2/style2.css" type="text/css">
<style>
.dropbtn {
background-color: #04AA6D;
color: white;
padding: 16px;
font-size: 16px;
border: none;
}
.dropdown {
position: absolute;
display: inline-block;
}
.dropdown-content {
display: none;
position: relative;
background-color: #f1f1f1;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
}
.dropdown-content button {
color: black;
padding: 12px 16px;
width: 100px;
text-decoration: none;
display: block;
}
.dropdown-content a:hover {background-color: #ddd;}
.dropdown:hover .dropdown-content {display: block;}
.dropdown:hover .dropbtn {background-color: #3e8e41;}
html, body {
width: 100%;
height: 100%;
margin: 0px;
border: 0;
overflow: hidden;
display: block;
}
canvas {
position: absolute;
}
</style>
</head>
<body>
<canvas id="myCanvas" width="1" height="1" style="border:1px solid #ffffff;">
Your browser does not support the HTML5 canvas tag.</canvas>
<div class="dropdown">
<button class="dropbtn" id="btn">kL = 0.5/&#960</button>
<div class="dropdown-content">
<button onclick="Nodes(0.5)">kL = 0.5/&#960</button>
<button onclick="Nodes(1.5)">kL = 1.5/&#960</button>
<button onclick="Nodes(2.5)">kL = 2.5/&#960</button>
<button onclick="Nodes(3.5)">kL = 3.5/&#960</button>
<button onclick="Nodes(4.5)">kL = 4.5/&#960</button>
<button onclick="Nodes(5.5)">kL = 5.5/&#960</button>
<button onclick="Nodes(6.5)">kL = 6.5/&#960</button>
<button onclick="Nodes(7.5)">kL = 7.5/&#960</button>
<button onclick="Nodes(8.5)">kL = 8.5/&#960</button>
</div>
</div>
<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
c.width = window.innerWidth;
c.height = window.innerHeight;
var nodes = .5;
var nn = 42
var eps = 20 / (nodes + 1);
var kl = Math.PI * nodes;
var o = 2 * nodes;
var xPos = -90;
var yPos = -50;
var m = 1;
ctx.translate(ctx.canvas.width / 2, ctx.canvas.height / 2)
ctx.scale(6, -6);
function Clear(ctx)
{
ctx.clearRect(-c.width, -c.height, c.width * 2, c.height * 2);
}
function Update()
{
Clear(ctx);
Draw();
m += 1;
console.log(m);
setTimeout(Update, 1000/60)
}
function Draw()
{
drawOscillatingSpring(1, 7, 160, 10, 50, xPos, 0, 0.1)
}
function drawOscillatingSpring(a, b, xSize, ySize, numLoops, x, y, tStep)
{
//Draws coiled spring using prolate cycloid
var tStart = Math.PI / 2;
var tEnd = (3 * Math.PI / 2) + (2 * Math.PI * numLoops);
var xEnd = a * tEnd - b * Math.sin(tEnd);
var yEnd = a + b;
var xFactor = xSize / xEnd;
var yFactor = ySize / yEnd;
var xShiftA = - a * (Math.PI / 2) + b * Math.sin(Math.PI / 2);
var yShift = y - a + b * Math.cos(Math.PI / 2);
ctx.beginPath();
var xDisplacement = eps * Math.sin(m * 0.1) * Math.sin((xFactor * (a * Math.PI / 2 - b * Math.sin(Math.PI / 2)) + xShiftA) * nodes * Math.PI / xSize);
ctx.moveTo(xShiftA + x + xDisplacement + xFactor * (a * Math.PI / 2 - b * Math.sin(Math.PI / 2)), yShift + yFactor * (a - b * Math.cos(Math.PI / 2)));
for (t = tStart; t <= tEnd; t += tStep)
{
xDisplacement = eps * Math.sin(m * 0.1) * Math.sin((xFactor * (a * t - b * Math.sin(t)) + xShiftA) * nodes * Math.PI / xSize);
//ctx.moveTo(xShiftA + x + xDisplacement + xFactor * (a * t - b * Math.sin(t)), yShift + yFactor * (a - b * Math.cos(t)));
ctx.lineTo(xShiftA + x + xDisplacement + xFactor * (a * (t + tStep) - b * Math.sin(t + tStep)), yShift + yFactor * (a - b * Math.cos(t + tStep)));
}
ctx.stroke();
}
function Nodes(num)
{
nodes = num;
btn.textContent = "kL = " + num;
eps = 20 / (nodes + 1);
kl = Math.PI * nodes;
o = 2 * nodes;
}
document.onkeypress = function (e) {
e = e || window.event;
if (e.keyCode == 49)
{
nodes = .5;
} else if (e.keyCode == 50)
{
nodes = 1.5;
} else if (e.keyCode == 51)
{
nodes = 2.5;
} else if (e.keyCode == 52)
{
nodes = 3.5;
} else if (e.keyCode == 53)
{
nodes = 4.5;
} else if (e.keyCode == 54)
{
nodes = 5.5;
} else if (e.keyCode == 55)
{
nodes = 6.5;
} else if (e.keyCode == 56)
{
nodes = 7.5;
} else if (e.keyCode == 57)
{
nodes = 8.5;
}
btn.textContent = "kl = " + nodes;
eps = 20 / (nodes + 1);
kl = Math.PI * nodes;
o = 2 * nodes;
};
window.addEventListener('resize', function(event) {
c.width = window.innerWidth;
c.height = window.innerHeight;
ctx.translate(c.width / 2, c.height / 2);
ctx.scale(6, -6);
}, true);
Update();
</script>
</body>
<p xmlns:cc="http://creativecommons.org/ns#" style="font-size: 1vw; bottom: 0px; position: absolute;">
This work is licensed under
<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>
</html>