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<!doctype html>
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<title>Anim.frame — Ludic</title>
<meta name="description" content="The looping frame index for an elapsed timer at a given fps.">
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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-anim.html">Anim</a> <span>›</span> <span class="here">Anim.frame</span></div>
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<span class="kind-badge kind-method">method</span>
<h1 id="top">Anim.frame</h1>
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<code class="sig">Anim.frame(timer, fps, count) -&gt; int</code>
<div class="desc"><p>Returns the current frame of a looping clip: <code>floor(timer * fps)</code> reduced modulo <code>count</code>. <code>timer</code> is elapsed seconds as a <code>fixed</code>, <code>fps</code> the clip's frames per second, and <code>count</code> the number of frames. The clip wraps forever — frame <code>count-1</code> is followed by frame <code>0</code>.</p></div>
<div class="params"><h2>Parameters</h2><div class="param" id="param-timer"><code class="pname">timer</code><span class="pdesc">elapsed seconds (a <code>fixed</code>)</span></div><div class="param" id="param-fps"><code class="pname">fps</code><span class="pdesc">frames per second</span></div><div class="param" id="param-count"><code class="pname">count</code><span class="pdesc">number of frames in the clip</span></div></div>
<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Demo {
property Sprite { timer: fixed = 0.0 }
model Hero { Sprite }
handler Run phase Update {
Sprite.timer = Sprite.timer + Time.delta()
let cell = Anim.frame(Sprite.timer, 12, 4) # 4-frame run at 12 fps
print(cell)
}
}</pre></div>
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