36 lines
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2.1 KiB
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36 lines
No EOL
2.1 KiB
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<title>Math.floor — Ludic</title>
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<meta name="description" content="Round a fixed value down to the nearest whole 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-math.html">Math</a> <span>›</span> <span class="here">Math.floor</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.floor</h1>
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</div>
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<code class="sig">Math.floor(x) -> int</code>
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<div class="desc"><p>Takes a <code>fixed</code> value and returns the largest <code>int</code> not greater than it — rounding toward negative infinity, so <code>Math.floor(2.7)</code> is <code>2</code> and <code>Math.floor(-0.2)</code> is <code>-1</code>. This is the fixed-to-int conversion you reach for when turning a smooth position into a whole tile or pixel index. It is the same operation as the bare <code>floor(x)</code>.</p></div>
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<div class="params"><h2>Parameters</h2><div class="param" id="param-x"><code class="pname">x</code><span class="pdesc">the <code>fixed</code> value to round down</span></div></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program TileIndex {
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const TILE_SIZE: fixed = 16.0
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var world_x: fixed = 40.5
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handler Locate phase Update {
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let column = Math.floor(world_x / TILE_SIZE) # 2
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}
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}</pre></div>
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