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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 10-1
</title>
<style>
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>
<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
c.width = window.innerWidth;
c.height = window.innerHeight;
var h = 20;
var dt = .08;
var t = -1;
var m = 1;
var mmax = 100;
var xPos = -50;
var yPos = -50;
ctx.translate(ctx.canvas.width / 2, ctx.canvas.height / 2)
ctx.scale(3, -3);
function fnf(t)
{
var fd = 0;
if (t >= 0)
{
fd = 1 - t;
}
if (t < 0)
{
fd = 1 + t;
}
if (t > 1)
{
fd = 0;
}
if (t < -1)
{
fd = 0;
}
return fd;
}
function Clear(ctx)
{
ctx.clearRect(-c.width, -c.height, c.width * 2, c.height * 2);
}
function Update()
{
Clear(ctx);
Draw();
m += 1;
if (m > mmax)
{
m = 1;
t = -1;
}
console.log(m);
setTimeout(Update, 1000/60)
}
function Draw()
{
xc = 5 + 15 * t;
xc1 = 5 + 15 * (t - 1);
xc2 = 5 + 15 * (t + 1);
if (t < 0)
{
ctx.beginPath();
ctx.moveTo(xPos + 5, yPos + 40 + h * fnf(-t));
ctx.lineTo(xPos + xc2, yPos + 40);
ctx.lineTo(xPos + 95, yPos + 40);
ctx.stroke();
}
if (t >= 0 && t < 1)
{
ctx.beginPath();
ctx.moveTo(xPos + 5, yPos + 40 + h * fnf(-t));
ctx.lineTo(xPos + xc, yPos + 40 + h);
ctx.lineTo(xPos + xc2, yPos + 40);
ctx.lineTo(xPos + 95, yPos + 40);
ctx.stroke();
}
if (t >= 1 && t < 5)
{
ctx.beginPath();
ctx.moveTo(xPos + 5, yPos + 40);
ctx.lineTo(xPos + xc1, yPos + 40);
ctx.lineTo(xPos + xc, yPos + 40 + h);
ctx.lineTo(xPos + xc2, yPos + 40);
ctx.lineTo(xPos + 95, yPos + 40);
ctx.stroke();
}
if (t >= 5 && t < 6)
{
ctx.beginPath();
ctx.moveTo(xPos + 5, yPos + 40);
ctx.lineTo(xPos + xc1, yPos + 40);
ctx.lineTo(xPos + xc, yPos + 40 + h);
ctx.lineTo(xPos + 95, yPos + 40 + h * fnf(6-t));
ctx.stroke();
}
if (t >= 6 && t < 7)
{
ctx.beginPath();
ctx.moveTo(xPos + 5, yPos + 40);
ctx.lineTo(xPos + xc1, yPos + 40);
ctx.lineTo(xPos + 95, yPos + 40 + h * fnf(6-t));
ctx.stroke();
}
if (t >= 7 && t < 8)
{
ctx.beginPath();
ctx.moveTo(xPos + 5, yPos + 40);
ctx.lineTo(xPos + 95, yPos + 40);
ctx.stroke();
}
ctx.beginPath();
ctx.arc(xPos + 5, yPos + 40 + h * fnf(-t), 1, 0, Math.PI * 2);
ctx.fill();
t += dt;
}
window.addEventListener('resize', function(event) {
c.width = window.innerWidth;
c.height = window.innerHeight;
ctx.translate(c.width / 2, c.height / 2);
ctx.scale(3, -3);
}, 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>