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added factor and modulo controls, added svg download button #1

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75 changes: 70 additions & 5 deletions app.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@ import Snap from 'snapsvg'
import css from './s.css'
import mp3 from './art.mp3'

const modulo = 200

const padding = 20
const radius = (Math.min(window.innerHeight, window.innerWidth) / 2 - padding)
const circleCenterX = radius + (padding / 2)
Expand All @@ -27,6 +27,8 @@ const joinTwoNumbers = (a, b) => {

surface.line(aX, aY, bX, bY).attr({
stroke: `hsl(${color}, 100%, 50%)`,
// stroke: `black`,
opacity: 0.5,
strokeWidth: 1,
strokeLinecap: 'round'
})
Expand All @@ -41,16 +43,79 @@ const getCoordForNumber = (number) => {
return [x, y]
}

let factor = 1
let factor = getParameterByName("f") || 1
let modulo = getParameterByName("m") || 200
document.querySelector('#factor').value = factor * 1.0;
document.querySelector('#modulo').value = modulo * 1.0;

const draw = () => {

const _draw = () => {
surface.clear()
for (let i = 0; i < modulo; i++) {
joinTwoNumbers(i, i * factor % modulo)
}
// const [intPart, decimal] = `${factor}`.split('.')
// surface.text(5, 15, `Factor: ${intPart}${decimal ? '.' + decimal.charAt(0) : ''}`)
factor += 0.005
document.querySelector('#ratio').innerHTML = modulo/factor;

}

const draw = () => {
_draw();
factor *= 1.0
factor += 0.01
document.querySelector('#factor').value = factor;

}


function getParameterByName(name, url = window.location.href) {
name = name.replace(/[\[\]]/g, '\\$&');
var regex = new RegExp('[?&]' + name + '(=([^&#]*)|&|#|$)'),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, ' '));
}


function downloadSVGAsText() {
const svg = document.querySelector('svg');
const base64doc = btoa(unescape(encodeURIComponent(svg.outerHTML)));
const a = document.createElement('a');
const e = new MouseEvent('click');
a.download = factor + "-" + modulo + '.svg';
a.href = 'data:image/svg+xml;base64,' + base64doc;
a.dispatchEvent(e);
}


let intervalId;

function pause() {
clearInterval(intervalId);
}

function play() {
intervalId = setInterval(() => Promise.resolve().then(draw), 5);
}

setInterval(() => Promise.resolve().then(draw), 100)
_draw();

function updateFactor() {
factor = document.querySelector('#factor').value * 1.0;
_draw();
}

function updateModulo() {
modulo = document.querySelector('#modulo').value * 1.0;
_draw();
}

const downloadSVG = document.querySelector('#downloadSVG');
downloadSVG.addEventListener('click', downloadSVGAsText);
document.querySelector('#play').addEventListener('click', play);
document.querySelector('#pause').addEventListener('click', pause);

document.querySelector('#factor').addEventListener('change', updateFactor);
document.querySelector('#modulo').addEventListener('change', updateModulo);
16 changes: 14 additions & 2 deletions index.ejs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,8 +7,20 @@
</head>
<body>
<a class="i" href="https://github.com/22a/cardioid#cardioid" target="_blank"> ℹ️ </a>
<audio autoplay loop>
<!--<audio autoplay loop>
<source src="3" type="audio/ogg">
</audio>
</audio>-->
<p>
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811
</p>
<button id="downloadSVG">Download .svg</button>

<button id="play">Play</button>
<button id="pause">Pause</button>

<input type="number" id="factor" value="2" step="1">
<input type="number" id="modulo" value="200" step="1">

<div id="ratio"></div>
</body>
</html>