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35 lines
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<title>Noise.cellular2_id — Ludic</title>
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<meta name="description" content="The id of the nearest Worley cell — stable per cell.">
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<header class="nav"><div class="wrap nav-in"><a class="brand" href="index.html"><span class="logo">L</span> Ludic</a><button class="nav-toggle" aria-label="Toggle menu" aria-expanded="false">☰</button><nav class="nav-links"><a href="index.html">Home</a><a href="api.html">API Reference</a><a class="nav-cta" href="https://git.workshopsoft.io/workshopsoft/ludic">Source ↗</a></nav></div></header>
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<div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="ns-noise.html">Noise</a> <span>›</span> <span class="here">Noise.cellular2_id</span></div>
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<div class="item-head">
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<span class="kind-badge kind-method">method</span>
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<h1 id="top">Noise.cellular2_id</h1>
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<code class="sig">Noise.cellular2_id(x, y, seed) -> int</code>
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<div class="desc"><p>Returns the integer **id of the nearest cell** in the same Worley diagram that <a href="noise-cellular2"><code>Noise.cellular2</code></a> measures distance in — a stable hash that is identical for every sample point inside a given cell. Use it to assign something discrete per region: the biome or material of a cell, the variant of a scattered prop, a per-region colour. Combine it with the F1 distance to shade toward cell edges.</p><p>The id is a hash, so treat it as an opaque label (mod it into your table of choices); it is deterministic across platforms and runs.</p></div>
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<div class="params"><h2>Parameters</h2><div class="param" id="param-seed"><code class="pname">seed</code><span class="pdesc">the field selector (must match the <code>cellular2</code> call it pairs with)</span></div></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program CellId {
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entry {
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let seed = 7
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let id = Noise.cellular2_id(fixed(5) / fixed(4), fixed(3) / fixed(4), seed)
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let biome = Math.posmod(id, 4) # one of 4 biomes for this cell
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print(biome)
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}
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}</pre></div>
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