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<title>Anim.cell_y — Ludic</title>
<meta name="description" content="The source y (pixels) of a frame on a grid spritesheet.">
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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.cell_y</span></div>
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<span class="kind-badge kind-method">method</span>
<h1 id="top">Anim.cell_y</h1>
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<code class="sig">Anim.cell_y(frame, cols, cell_h) -&gt; int</code>
<div class="desc"><p>Turns a frame index into the top pixel of its cell on a spritesheet laid out as a grid of <code>cols</code> columns: <code>(frame / cols) * cell_h</code>. Pair with <a href="anim-cell_x"><code>Anim.cell_x</code></a> for the full source rectangle of the frame.</p></div>
<div class="params"><h2>Parameters</h2><div class="param" id="param-frame"><code class="pname">frame</code><span class="pdesc">the frame index (e.g. from <a href="anim-frame"><code>Anim.frame</code></a>)</span></div><div class="param" id="param-cols"><code class="pname">cols</code><span class="pdesc">columns in the sheet</span></div><div class="param" id="param-cell_h"><code class="pname">cell_h</code><span class="pdesc">cell height in pixels</span></div></div>
<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Demo {
handler Run phase Update {
let f = Anim.frame(fixed(1), 12, 8)
let sy = Anim.cell_y(f, 4, 16)
print(sy)
}
}</pre></div>
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