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<title>Tween.round — Ludic</title>
<meta name="description" content="Linear blend of two ints by amount t, rounded to the nearest int.">
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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-tween.html">Tween</a> <span>›</span> <span class="here">Tween.round</span></div>
<div class="item-head">
<span class="kind-badge kind-method">method</span>
<h1 id="top">Tween.round</h1>
</div>
<code class="sig">Tween.round(from, to, t) -&gt; int</code>
<div class="desc"><p>Interpolates two <code>int</code> endpoints by amount <code>t</code> and rounds to the nearest integer (half up): <code>from + round((to - from) * t)</code>. The go-to for tweening a pixel position, a channel byte, or any integer field. Combine with <a href="tween-ease"><code>Tween.ease</code></a> for shaped motion.</p></div>
<div class="params"><h2>Parameters</h2><div class="param" id="param-from"><code class="pname">from</code><span class="pdesc">the value at <code>t = 0</code> (an <code>int</code>)</span></div><div class="param" id="param-to"><code class="pname">to</code><span class="pdesc">the value at <code>t = 1</code> (an <code>int</code>)</span></div><div class="param" id="param-t"><code class="pname">t</code><span class="pdesc">the blend amount (a <code>fixed</code>, usually 0..1)</span></div></div>
<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Demo {
property Slide { timer: fixed = 0.0 }
model Card { Slide }
handler Run phase Update {
Slide.timer = Slide.timer + Time.delta()
let t = Tween.progress(Slide.timer, fixed(1))
let x = Tween.round(0, 320, Tween.ease(t, 2))
print(x)
}
}</pre></div>
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