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Add distance measurement and rescaling feature for 3DGS #246

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Add distance measurement and rescaling feature for 3DGS #246

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f8c7eb9
Add distance measurement and rescaling feature for 3DGS
MasahiroOgawa Dec 25, 2025
9ccb266
Add distance measurement and rescaling feature for 3DGS
MasahiroOgawa Dec 25, 2025
cb569d4
Fix distance-rescale example for arbitrary model sizes
MasahiroOgawa Dec 25, 2025
c9bb9b4
Improve marker visibility with larger size and white ring outline
MasahiroOgawa Dec 25, 2025
aa9f7cf
Fix point placement and movement restrictions on ray line
MasahiroOgawa Dec 25, 2025
4248569
Fix marker drag detection for Group objects
MasahiroOgawa Dec 25, 2025
221751b
Make markers constant screen size regardless of zoom level
MasahiroOgawa Dec 25, 2025
f51b396
Fix code review issues: explicit point2 check and memory disposal
MasahiroOgawa Dec 26, 2025
a6f53bc
Add unit tests for PlyWriter and fix format string bug
MasahiroOgawa Dec 26, 2025
2102759
Fix PLY format string to use underscores
MasahiroOgawa Dec 26, 2025
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109 changes: 109 additions & 0 deletions examples/distance-rescale/index.html
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<!DOCTYPE html>
<html>

<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Spark - Distance Measurement & Rescale</title>
<style>
body {
margin: 0;
overflow: hidden;
font-family: Arial, sans-serif;
background: #000;
}

header {
position: absolute;
color: silver;
font-family: sans-serif;
padding: 12px 16px;
text-align: left;
width: calc(100vw - 32px);
pointer-events: none;
text-shadow:
2px 2px 4px rgba(0, 0, 0, 0.8),
-1px -1px 2px rgba(0, 0, 0, 0.6),
1px -1px 2px rgba(0, 0, 0, 0.6),
-1px 1px 2px rgba(0, 0, 0, 0.6);
-webkit-text-stroke: 0.5px rgba(0, 0, 0, 0.7);
z-index: 10;
}

#file-input-container {
position: absolute;
bottom: 20px;
left: 20px;
z-index: 100;
}

#file-input-container label {
background: #333;
color: white;
padding: 10px 20px;
border-radius: 5px;
cursor: pointer;
font-size: 14px;
}

#file-input-container label:hover {
background: #555;
}

#file-input {
display: none;
}

#distance-display {
position: absolute;
bottom: 20px;
right: 20px;
background: rgba(0, 0, 0, 0.7);
color: white;
padding: 15px 20px;
border-radius: 8px;
font-size: 16px;
z-index: 100;
display: none;
}

#distance-display .label {
color: #aaa;
font-size: 12px;
margin-bottom: 5px;
}

#distance-display .value {
font-size: 24px;
font-weight: bold;
}
</style>
</head>

<body>
<header id="instructions">Click on the model to select first measurement point</header>

<div id="file-input-container">
<label for="file-input">Load PLY File</label>
<input type="file" id="file-input" accept=".ply,.spz,.splat">
</div>

<div id="distance-display">
<div class="label">Distance</div>
<div class="value" id="distance-value">0.000</div>
</div>

<script type="importmap">
{
"imports": {
"three": "/examples/js/vendor/three/build/three.module.js",
"three/addons/": "/examples/js/vendor/three/examples/jsm/",
"@sparkjsdev/spark": "/dist/spark.module.js",
"lil-gui": "/examples/js/vendor/lil-gui/dist/lil-gui.esm.js"
}
}
</script>
<script type="module" src="main.js"></script>
</body>

</html>
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