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32 lines
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1.9 KiB
HTML
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<title>Math.smoothstep — Ludic</title>
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<meta name="description" content="A smooth 0..1 ramp between two edges.">
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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.smoothstep</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.smoothstep</h1>
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</div>
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<code class="sig">Math.smoothstep(e0, e1, x) -> fixed</code>
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<div class="desc"><p>Returns <code>0.0</code> when <code>x</code> is at or below <code>e0</code>, <code>1.0</code> at or above <code>e1</code>, and a smooth S-curve (ease-in and ease-out) in between — the classic <code>t*t*(3 - 2t)</code> Hermite ramp. Use it for fades, dissolves, and easing a normalized amount before feeding it to <code>Math.lerp</code>, when a straight linear ramp looks too abrupt.</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 a = Math.smoothstep(0.0, 1.0, fade_t)
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}
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}</pre></div>
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