149 lines
4.7 KiB
HTML
149 lines
4.7 KiB
HTML
<!--
|
|
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 12-2
|
|
</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");
|
|
ctx.canvas.width = window.innerWidth;
|
|
ctx.canvas.height = window.innerHeight;
|
|
|
|
var screenasp = 1;
|
|
var plotarea = 200;
|
|
var k12 = 3;
|
|
var nn = 2;
|
|
var dt = .1 * nn;
|
|
var o1 = new Array(nn + 1);
|
|
var o2 = new Array(nn + 1);
|
|
var f1 = new Array(nn + 1);
|
|
var f2 = new Array(nn + 1);
|
|
var d = 30;
|
|
var colorSpeed = 1;
|
|
var maxReps = 1;
|
|
var xPos = -100;
|
|
var yPos = -100;
|
|
ctx.translate(ctx.canvas.width / 2, ctx.canvas.height / 2);
|
|
ctx.scale(2, -2);
|
|
|
|
for (j = 1; j <= nn; j++)
|
|
{
|
|
o1[j] = Math.random() - 0.5;
|
|
o2[j] = Math.random() - 0.5;
|
|
f1[j] = (Math.random() - 0.5) * Math.PI;
|
|
f2[j] = (Math.random() - 0.5) * Math.PI;
|
|
}
|
|
|
|
function x(t)
|
|
{
|
|
fx = 0;
|
|
for (j = 1; j <= nn; j++)
|
|
{
|
|
fx += Math.cos((1 + o1[j] / d) * t + f1[j]);
|
|
}
|
|
return fx / nn;
|
|
}
|
|
|
|
function y(t)
|
|
{
|
|
fy = 0;
|
|
for (j = 1; j <= nn; j++)
|
|
{
|
|
fy += Math.cos((1 + o2[j] / d) * t + f1[j]);
|
|
}
|
|
return fy / nn;
|
|
}
|
|
|
|
var xmin = -1;
|
|
var xmax = 1;
|
|
var ymin = -1;
|
|
var ymax = 1;
|
|
|
|
function xx(x)
|
|
{
|
|
return 200 * (x - xmin) / (xmax - xmin);
|
|
}
|
|
|
|
function yy(y)
|
|
{
|
|
return 200 * (y - ymin) / (ymax - ymin);
|
|
}
|
|
|
|
function Fade()
|
|
{
|
|
for (i = 0; i <= maxReps; i++)
|
|
{
|
|
ctx.globalAlpha = 0.025;
|
|
ctx.fillStyle = "#ffffff";
|
|
ctx.beginPath();
|
|
ctx.fillRect(-c.width, -c.height, c.width * 2, c.height * 2);
|
|
ctx.stroke();
|
|
ctx.globalAlpha = 1;
|
|
}
|
|
setTimeout(Fade, 2000)
|
|
}
|
|
|
|
var x1 = x(0);
|
|
var y1 = y(0);
|
|
var t = 0;
|
|
Fade(ctx);
|
|
|
|
function Update()
|
|
{
|
|
t += dt;
|
|
nx = x(t);
|
|
ny = y(t);
|
|
xFactor = 1;
|
|
yFactor = 1;
|
|
//xFactor = c.width / 400;
|
|
//yFactor = c.height / 400;
|
|
ctx.strokeStyle = "hsl(" + (t * colorSpeed) % 360 + ",100%,50%)";
|
|
ctx.beginPath();
|
|
ctx.moveTo((xx(x1) + xPos) * xFactor, (yy(y1) + yPos) * yFactor);
|
|
ctx.lineTo((xx(nx) + xPos) * xFactor, (yy(ny) + yPos) * yFactor);
|
|
ctx.stroke();
|
|
x1 = nx;
|
|
y1 = ny;
|
|
setTimeout(Update, 500/60)
|
|
}
|
|
|
|
|
|
window.addEventListener('resize', function(event) {
|
|
c.width = window.innerWidth;
|
|
c.height = window.innerHeight;
|
|
ctx.translate(c.width / 2, c.height / 2);
|
|
ctx.scale(2, -2);
|
|
}, 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> |