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Create threejs webgl hourglass with flowing sand #1

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Create threejs webgl hourglass with flowing sand #1

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341bb6b
Create interactive Three.js hourglass with particle-based sand simula…
cursoragent Aug 7, 2025
5188bae
Implement GPGPU particle simulation for hourglass sand physics
cursoragent Aug 7, 2025
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45 changes: 45 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Three.js Hourglass Sand</title>
<style>
html, body {
margin: 0;
padding: 0;
height: 100%;
background: radial-gradient(1200px 800px at 50% 30%, #1f2340 0%, #0f111a 60%, #0a0b12 100%);
color: #e8e8f0;
font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}
#app {
position: fixed;
inset: 0;
overflow: hidden;
}
.overlay {
position: fixed;
left: 12px;
bottom: 12px;
background: rgba(0,0,0,0.35);
padding: 8px 10px;
border-radius: 8px;
font-size: 12px;
line-height: 1.4;
user-select: none;
pointer-events: none;
}
a { color: #7acfff; text-decoration: none; }
</style>
</head>
<body>
<div id="app"></div>
<div class="overlay">
Hourglass with particle sand (Three.js)<br/>
- Drag to orbit, scroll to zoom<br/>
- Press <strong>F</strong> to flip the hourglass
</div>
<script type="module" src="./main.js"></script>
</body>
</html>
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