clp/hilbert-clock
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only 60 dots, to match normal clocks; colours change through the day and support dark mode

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Christian Lawson-Perfect 2025-03-18 09:01:12 +00:00
parent 24758b7758
commit 6eaa95d0f7
3 changed files with 80 additions and 14 deletions
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15
index.html
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@ -3,12 +3,11 @@
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>A thing made by CLP</title>
<title>Hilbert clock</title>
<script type="module" src="script.js"></script>
<link rel="stylesheet" href="style.css">
</head>
<body>
<main>
<svg id="board" viewBox="-0.3 -0.3 1.6 1.6" style="max-height: 100svh">
<defs>
<linearGradient id="dots-gradient">
@ -16,12 +15,14 @@
<stop offset="100%" stop-color="white" />
</linearGradient>
</defs>
<rect x="-100" y="-100" width="200" height="200" fill="hsl(140,60%,60%)"/>
<path class="curve" fill="none" stroke="hsl(24,50%,10%)" stroke-width="0.01" stroke-linejoin="round" stroke-linecap="square"/>
<path class="curve" fill="none" stroke="hsl(240,50%,50%)" stroke-width="0.01" stroke-linejoin="round" stroke-linecap="square"/>
<path id="dots" fill="none" stroke="hsl(240,20%,90%)" stroke-width="0.01" stroke-linejoin="round" stroke-linecap="round"/>
<path id="big-hand" class="curve" fill="none" stroke-width="-1.01" stroke-linejoin="round" stroke-linecap="square"/>
<path id="small-hand" class="curve" fill="none" stroke-width="0.01" stroke-linejoin="round" stroke-linecap="square"/>
<path id="dots" fill="none" stroke-width="0.01" stroke-linejoin="round" stroke-linecap="round"/>
<text id="debug" fill="white" font-size="0.1"></debug>
</svg>
</main>
<footer>
<p><a href="https://somethingorotherwhatever.com">made by clp</a></p>
</footer.
</body>
</html>

23
script.js
View file

@ -26,6 +26,7 @@ const width = 1.5 * 2**-(steps+1);
const dots = [];
let i = 0;
for(let c of s) {
const [dx,dy] = dir;
switch(c) {
@ -36,15 +37,19 @@ for(let c of s) {
dir = [dy,-dx];
break;
case 'F':
i += 1;
x += dx;
y += dy;
d += `l ${dx} ${dy}`;
}
if(i==61) {
break;
}
}
d += 'l 0.000000001 0.000001'; // make sure the final dot is drawn
const length = (2**(2*steps)-1) * m;
const length = 60 * m;
const curves = Array.from(document.querySelectorAll('.curve'));
@ -67,13 +72,17 @@ function easeLinear(t) {
}
function frame() {
const segments = 2**(2*steps)-1; // number of segments in the curve
const period = 1000*60/segments; // One period of the small hand is 60 seconds
const now = new Date();
const midnight = new Date(now.getFullYear(),now.getMonth(),now.getDate());
const dt = (new Date() - midnight);
document.body.style.setProperty('--bg-hue',dt*360/(1000*60*60*24));
const segments = 60; // number of segments in the curve
const period = 1000; // One period of the small hand is 60 seconds
curves.forEach((curve,i) => {
const now = new Date();
const midnight = new Date(now.getFullYear(),now.getMonth(),now.getDate());
const dt = (new Date() - midnight) / period / (60**(1-i));
const m = dt % (2*segments);
const m = (dt / period / (60**(1-i))) % (2*60); // between 0 and 120
//const m = document.getElementById('t').valueAsNumber * 120;
const t = i == 0 ? m : (Math.floor(m) + easeInOutSine(m % 1)); // linear for big hand, eased for small hand
const a = t/segments; // between 0 and 2
const b = 2*(1-Math.abs(1-a/2));

56
style.css
View file

@ -2,4 +2,60 @@
--spacing: 1em;
color-scheme: light dark;
--bg-hue: 210;
--bg-lum: 60%;
--hand-hue: calc(180 + var(--bg-hue));
--big-hand-lum: 15%;
--small-hand-lum: 50%;
--dots-lum: 90%;
}
a {
filter: saturate(0%);
font-family: sans-serif;
}
@media (prefers-color-scheme: dark) {
:root {
--bg-lum: 20%;
--big-hand-lum: 90%;
--small-hand-lum:60%;
--dots-lum: 15%;
}
}
body {
margin: 0;
background: hsl(var(--bg-hue),60%,var(--bg-lum));
display: grid;
justify-items: center;
grid-template: 1fr auto / 1fr;
height: 100svh;
overflow: hidden;
}
#board {
width: 100%;
height: 100%;
}
main {
height: 100%;
}
path {
stroke: hsl(var(--hand-hue),50%,var(--lum));
}
#big-hand {
--lum: var(--big-hand-lum);
}
#small-hand {
--lum: var(--small-hand-lum);
}
#dots {
--lum: var(--dots-lum);
}