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<title>Noise.value2 — Ludic</title>
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<meta name="description" content="2D value (lattice) noise, deterministic, in [-1, 1].">
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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.value2</span></div>
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<span class="kind-badge kind-method">method</span>
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<h1 id="top">Noise.value2</h1>
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<code class="sig">Noise.value2(x, y, seed) -> fixed</code>
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<div class="desc"><p>Samples 2D **value noise** at <code>(x, y)</code> for the given <code>seed</code> and returns a <a href="type-fixed"><code>fixed</code></a> in <code>[-1, 1]</code>. Value noise assigns a pseudo-random value to each integer lattice point and smoothly interpolates between them with a quintic fade — the cheapest generator here, with a slightly blocky, retro character that suits low-detail height fields, dithering, and per-cell variation.</p><p>Because it is a pure function of <code>(x, y, seed)</code> in fixed point, the same arguments always produce the same value on every platform. Sample at a fractional frequency (scale the coordinates) to change feature size.</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; different seeds give independent worlds</span></div></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Value {
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entry {
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let seed = 1337
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let n = Noise.value2(fixed(3) / fixed(8), fixed(5) / fixed(8), seed)
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print(Math.floor(Noise.unit(n) * fixed(100))) # a 0..100 height
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}
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}</pre></div>
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