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1.9 KiB
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32 lines
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1.9 KiB
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<title>Math.sqrt — Ludic</title>
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<meta name="description" content="The square root of a fixed value.">
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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-math.html">Math</a> <span>›</span> <span class="here">Math.sqrt</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">Math.sqrt</h1>
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</div>
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<code class="sig">Math.sqrt(x) -> fixed</code>
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<div class="desc"><p>Returns the non-negative square root of <code>x</code>, computed in Q16.16 by a deterministic integer algorithm — so it is bit-identical on every platform, the same guarantee the rest of the runtime gives. Negative inputs return <code>0</code>. Use it for lengths and distances; when you have two legs of a right triangle reach for <code>Math.hypot</code>, and when you only need to compare magnitudes prefer the cheaper squared distance <code>Math.dist2</code>.</p></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Demo {
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handler Step phase Update {
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let speed = Math.sqrt(vx * vx + vy * vy)
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}
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}</pre></div>
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